Operating Instructions SECUTEST S2 N+w Test Instrument with Automatic Test Sequences for IEC 60974-4 and Draft IEC 62638 3-349-630-03 5/8.13 Figure shows device with optional SI module optional test adapter SECULOAD
10 9 8 7 6 5 4 Connection of Standard Probe 1 Insert the probe s double plug into sockets 4 and 5 such that the plug with the white ring makes contact with socket 5 (vertical bar). 11 12 13 RS232 IOIOI 23 18 22 14 15 PROBE 5 4 PROBE 20 19 18 17 16 3 Max. 250 V 2 Max. 10 V 1 L N PE! Page 8 Connection of Probe 2 (for Test per IEC 60974-4/VDE 0544-4) Insert the probe s double plug into sockets 2 and 3 after being prompted to do so. Note Contact problems with exposed conductive parts when using the standard probe with test tip In order to assure good contact, surface coatings must be removed from devices under test with special tools at a suitable location. The tip of the test probe is not suitable for scratching away paint, because this may impair its coating and/ or mechanical strength. The Z745G brush probe may be more suitable than the test prob e in certain individual cases. Scope of delivery: 1 SECUTEST S2N+w test instrument 2 Probe cables with test probe 1 Plug-on alligator clip for test probes 3 Plug-on quick clips 1 Calibration certificate per DAkkS 1 Set operating instructions 1 Carrying strap Up-to-date PC software (free starter program or demo software for data management, as well as report and list generation) can be downloaded from our website. SECUTEST S2N+w Protective conductor resistance measurement: Test current of 200 ma DC or 10 A AC 21 These operating instructions describe an instrument with firmware version 8.6.5 2 GMC-I Messtechnik GmbH
Upper Left Figure 1 Jack for protective conductor at device under test 2 Jack for neutral conductor at device under test (test per VDE 0544-4:2009-06: connect to measurement output at the SECULOAD* adapter) Jack for connecting probe 2 3 Jack for phase conductor at device under test (test per VDE 0544-4:2009-06: connect to measurement output at the SECULOAD* adapter) Jack for connecting probe 2 4 Jack for connecting probe 1 5 Jack for connecting probe 1 6 Function Selector Switch VDE- : Automated test sequence per selected standard Off: Instrument is switched off (no disconnection from mains) Menu: Setup : Configure device parameters (see section 8) R PE : Individual measurements (see section 9) Function test: Function test (see section 10) 7 key for selecting menus and parameters 8 key for selecting menus and parameters 9 LCD panel 10 Socket connector for RS232 interface for SI module SECUTEST SI+, SECUSTORE memory adapter, barcode scanner or RFID reader) 11 Signal lamp for mains connection error 12 key for entry, for starting test sequences and for finger contact 13 i help key (context sensitive) 14 Key next to the symbol for switching test voltage to the test socket (only possible if symbol LED is blinking) 15 Signal lamp for the function test Lower Left Figure 16 Push-buttons (left and right) for releasing the handle from its snap-in position 17 Standard outlet socket (test socket) for connecting the device under test (see section 7) 18 Push-buttons (left and right) for releasing the lid 19 Compartment for probe and accessories 20 Lid 21 Probe with test tip (accessory probe with SK2W coil cable (Z745N)) 22 Carrying handle and tilt stand 23 Cover or SI module (accessory: SECUTEST PSI or SECUTEST SI+) Overview of Available Probe Types Probe Type Article No. Applications Special Features Standard probe 1(cable with Test current: max. 25 A Probe with straight cable test probe and alligator clip) Probe 2 (cable with test probe) Test current: max. 25 A Probe with straight cable SK2 (accessory) Z745D Test current: max. 25 A Probe with straight cable, 2m long SK2W (accessory) Z745N Test current: max. 25 A Test probe with coil cable, 2 m long Option SK5 (accessory) Z745K Testing of several protective conductor connections Brush probe (accessory) Can be plugged onto all above listed probes and test probes! Z745G Leakage current, protective conductor resistance Special probe in combination with automatic recognition of measuring point change function (see page 13). For contacting devices under test with rotating, vibrating, exposed conductive parts Note Use of probes other than those specified above: Cables plugged into jacks 4 and 5 must be short-circuited in order to perform the probe test, either by plugging the cable ends together or by means of a conductive surface at the device under test (4-wire measurement). Remove any corrosion from the device under test. Data Backup Measurement data, report data and user entries are stored to RAM at the SI module (accessory), as long as the respective battery supplies the required amount of voltage. Save your data to a PC on a regular basis in order to prevent any loss of data at the SI module. We assume no responsibility for any data loss. Up-to-date PC software (free starter program or demo software for data management, as well as report and list generation) can be downloaded from our website. * Accessory, Z745V (not included in scope of delivery) GMC-I Messtechnik GmbH 3
Contents Page Contents Page 1 Applications...6 1.1 Table: Types of DUTs Tests Regulations...6 1.2 Table: Individual Measurements and Regulations...6 1.3 Table: Leakage Current Types...7 2 Safety Features and Precautions...7 3 Initial Start-Up...8 3.1 Connection to the Mains (230 V, 50 Hz)...8 3.2 Automatic Recognition of Mains Connection Errors...9 4 General Notes...10 4.1 Prompting...10 4.1.1 Changing the User Interface Language...10 4.1.2 Automatic Protection Class Selection...10 4.1.3 Manual or Automatic Operating Sequences...10 4.2 Help Function...10 4.3 Adjusting Contrast...11 4.4 Configuring Device Parameters, Setting Date and Time...11 4.5 Configuring Measurement and Sequence Parameters...11 4.6 Setting Standard-Specific Limit Values (not in DIN EN 60974-4)...11 4.7 Saving Settings...11 5 Classification of Devices Under Test...12 5.1 Protection Classes...12 6 Abbreviations...12 7 Connecting the Device Under Test...13 8 Configuring Device Parameters...15 9 Individual Measurements...16 9.1 Measuring Protective Conductor Resistance... 16 9.2 Insulation Resistance R ISO.... 17 9.3 Measuring Leakage Current... 19 9.3.1 Touch Current I T (welding circuit leakage current)... 19 9.3.2 Protective Conductor Current (primary leakage current), Differential Current Method (I DI )... 19 9.4 Equivalent Leakage Current... 20 9.5 Probe Voltage U probe Max. 300 V... 22 9.6 Alternating / Direct Voltage U AC/DC Max. 253 V (open circuit voltage U 0 )... 22 9.7 Resistance R... 23 9.8 Measurements with Accessories... 23 9.8.1 Alternating Current I Z with Current Clamp... 23 9.9 Protective Conductor Resistance R PE via Current Clamp... 24 9.9.1 Temperature T with Pt100/1000 Sensor... 24 10 Function Test...26 11 Measurements Switch Position: Standard (VDE...)...28 11.1 Test Sequences... 28 11.2 Setting Up Test Sequences... 29 11.3 Configuring Measuring Parameters... 29 11.4 Testing Extension Cables in Accordance with DIN VDE 0701-0702... 30 11.5 Testing Devices per DIN VDE 0701-0702 Passive... 32 11.6 Testing Devices per DIN VDE 0701-0702 Active... 34 11.7 Testing Devices per DIN VDE 0701-0702 EDP... 36 11.8 Test per DIN EN 60974-4 (VDE 0544-4:2009-06)... 38 12 Saving Data to the SI Module (accessory) and Database Operations...40 12.1 Saving Measurement Data to the SI Module (accessory)... 40 12.2 Storing Test Results to the SECUTEST S2N+w... 40 4 GMC-I Messtechnik GmbH
Contents Page 13 Storing Test Results to the Test Instrument and Printing them in Report Form... 41 14 Characteristic Values... 42 15 RS232 Interface... 45 15.1 Transmission of Measurement Results to the SI Module...45 15.2 PC Connection...45 15.2.1 Software Evaluation of Measurement Results...45 15.2.2 Instrument Control via Interface Commands...45 15.3 Interface Configuration and Protocol...45 16 Appendix... 46 16.1 Evaluation of Measured Values for Individual Measurements as well as for Calculated Quantities...46 16.2 Evaluation of Measured Values for Leakage Current Measurements (Automatic Test Sequence in Accordance with the Standard)...46 16.3 Index...47 17 Maintenance Recalibration... 48 17.1 Housing Maintenance...48 17.2 Recalibration...48 17.3 Safety Inspections...49 17.4 Return and Environmentally Sound Disposal...49 18 Repair and Replacement Parts Service Calibration Center and Rental Instrument Service... 50 19 Product Support... 51 GMC-I Messtechnik GmbH 5
1 Applications 1.1 Table: Types of DUTs Tests Regulations Testing after Repairs / Periodic Testing DUTs to be tested in accordance with the following regulations Electrical equipment for measurement, control and laboratory use Voltage generating devices Electrical tools Electrical heaters Devices with electric motors Light fixtures Consumer electronics, IT equipment and communications electronics Cable reels, extension cables and device connector cables Data processing equipment and office machines Arc welding equipment! Draft IEC 62638 / VDE 0701-0702 IEC 60974-4 / VDE 0544-4 Attention! The test instrument may not be used for measurements within electrical systems! 1.2 Table: Individual Measurements and Regulations Individual Measurements per Regulation Key Specified test Test Current [A] Draft IEC 62638 / VDE 0701-0702 IEC 60974-4 / VDE 0544-4 Protective conductor resistance 0.2 Insulation resistance Equivalent leakage current Equivalent (device) leakage current Differential current Protective conductor current Primary leakage current Touch current Absence of voltage (exposed conductive parts) Patient leakage current Device leakage current Welding circuit leakage current 6 GMC-I Messtechnik GmbH
1.3 Table: Leakage Current Types Draft IEC 62638 / IEC 60974-4 / VDE 0701-0702 VDE 0544-4 Equivalent leakage current Touch current / current measurement for absence of voltage Protective conductor current with differential current method Welding circuit leakage current Primary leakage current during operation, direct measurement Primary leakage current during operation, differential current method Key NC = Normal conditions PE = Potential earthing, mains protective conductor DPE = Protective conductor of the device under test The following is measured: PROBE (connected to protective conductor) to L & N Probe to PE Protective conductor to PE Protective conductor interrupted, probe to PE See section 9.3.2 2 Safety Features and Precautions This instrument fulfills all requirements of applicable European and national EC directives. We confirm this with the CE mark. The relevant declaration of conformity can be obtained from GMC-I Messtechnik GmbH. The SECUTEST S2N+w test instrument has been manufactured and tested in accordance with the following safety regulations: IEC 61010-1 / DIN EN 61010-1 / VDE 0411-1, DIN VDE 0404, DIN VDE 0413, parts 2 and 4 The safety of the user, the test instrument and the device under test (electrical equipment) is only assured when the instrument is used for its intended purpose. Read the operating instructions carefully and completely before placing your test instrument into service. Follow all instructions contained therein. Make sure that the operating instructions are available to all users of the instrument. Tests may only be performed by a qualified electrician, or under the supervision and direction of a qualified electrician. The user must be instructed by a qualified electrician concerning performance and evaluation of the test. Observe the following safety precautions: The instrument may only be connected to a 230 V/240 V mains system that complies with the applicable safety regulations (e.g. IEC 60346, VDE 0100) and is protected with a fuse or circuit breaker with a maximum rating of 16 A. Measurements within electrical systems are prohibited. Be prepared for the occurrence of unexpected voltages at devices under test (for example, capacitors may be dangerously charged). Make certain that the measurement cables are in flawless condition, e.g. no damage to insulation, no cracks in cables or plugs etc. If a probe with coil cable (SK2W) is used: Grip the test probe firmly, for example during insertion into a jack socket. Tensioning at the coil cord may otherwise cause the test probe to snap back resulting in possible injury. Measurement of Insulation Resistance and Equivalent Leakage Current: Testing is conducted with up to 500 V. Current limiting is utilized (I < 3.5 ma), but if the terminals (3 or 2) are touched, electrical shock may occur which could result in consequential accidents. If the DUT is connected via jacks 1 through 3, special care must be taken to avoid contact with open cables. Leakage Current Measurement: It is absolutely essential to assure that the device under test is operated with line voltage during performance of the leakage current measurement. Exposed conductive parts may conduct dangerous contact voltage during testing, and may not under any circumstances be touched (mains power is disconnected if leakage current exceeds approx. 10 ma).! Attention! The function test may only be performed after the DUT has successfully passed the safety test! GMC-I Messtechnik GmbH 7
Switching Loads Be sure to adhere to the sequence specified below when switching DUTs which are subjected to a load. Excessive wear of the mains relay in the test instrument is avoided in this way. Start the measurement: 1) DUT: Turn the DUT off with its own switch. 2) SECUTEST S2N+w: Switch line voltage to the test socket. 3) DUT: Turn the DUT on with its own switch. End the measurement: 4) DUT: Turn the DUT off with its own switch. 5) SECUTEST S2N+w: Disconnect line voltage from the test socket. Measurement at Jacks 1 2 3 First start the respective measurement and contact the measuring point. No more than 10 V nay be applied between jacks 1 and 2. Up to 250 V nay be applied between jacks 2 and 3. Attention: Jacks 2 and 3 are short-circuited during all measurements conducted at the test socket (exception: see section 9.6)!! The measuring and test instrument may not be placed into service: If external damage is apparent With damaged connector cables, measuring cables or patient ports If the instrument no longer functions flawlessly After extraordinary stresses due to transport In such cases, the instrument must be removed from operation and secured against unintentional use. Meaning of Symbols on the Instrument The symbols on the instrument have the following meanings:! Warning regarding dangerous electrical voltage Warning concerning a point of danger (attention: observe documentation!) Test socket 3 Initial Start-Up This device may not be disposed of with the trash. Further information regarding the WEEE mark can be accessed on the Internet at www.gossenmetrawatt.com by entering the search term WEEE. 3.1 Connection to the Mains (230 V, 50 Hz) Ð Connect the mains plug at the test instrument to the mains power outlet. The function selector switch can be set to any position. If a mains outlet (earthing contact outlet) is not available, or if only a 3-phase outlet is available, the adapter socket can be used to connect the phase conductor, the neutral conductor and the protective conductor. The adapter socket has three permanently attached cables and is included with the KS13 cable set. Opening of Equipment / Repair The equipment may be opened only by authorized service personnel to ensure the safe and correct operation of the equipment and to keep the warranty valid. Even original spare parts may be installed only by authorized service personnel. In case the equipment was opened by unauthorized personnel, no warranty regarding personal safety, measurement accuracy, conformity with applicable safety measures or any consequential damage is granted by the manufacturer.! Attention! If connection is not possible via an earthing contact outlet: Shut down mains power first. Then connect the cables from the coupling socket to the mains using pick-off clips in accordance with the diagram. Disconnection of the test instrument from mains power is only possible with the mains plug. 8 GMC-I Messtechnik GmbH
U L N = 230 V green-yellow green-yellow L1 N PE L1 L2 L3 N PE L1 L2 L3 N Type of Mains Connection Error Phase conductor L at protective conductor PE to finger contact ( key) 1 Protective conductor PE and phase conductor L reversed and/or neutral conductor N interrupted Contact voltage at protective conductor PE to neutral conductor N Message Condition Measurement Text at LCD panel! lamp lights up Text at LCD panel! Press key U 100 V Voltage at PE >65V U 50 V Disabled Impossible (no supply power) Disabled, although disabling can be deactivated 1 Line voltage Possible under certain circumstances U too low L-N < 180 V lamp lights up Switch position: Setup menu: Test Sequence parameter: IT system Mains Connection green-yellow 3.2 Automatic Recognition of Mains Connection Errors The device automatically recognizes mains connection errors if the conditions in the following table have been fulfilled. The user is informed of the type of error, and all measuring functions are disabled in the event of danger.! Attention! If you discover during the protective conductor potential test that the mains protective conductor is charged with voltage (in accordance with the two cases mentioned first), you may no longer perform any measurements with your test instrument. Voltage is actually present at the exposed earthing contacts of the standard socket (17) and may be dangerous to you. Disconnect the test instrument from the mains immediately and see to it that the defect at the mains connection is repaired. Note Voltage at the electrical system s protective conductor PE may result in distorted measurement values during testing for the absence of voltage, or during leakage voltage measurements. GMC-I Messtechnik GmbH 9
4 General Notes 4.1 Prompting Integrated online instructions inform the user regarding all required connections, necessary work steps, operator errors, measurement results and more in all measuring modes. Information and test results appear at the dot matrix LCD in plain text. 4.1.1 Changing the User Interface Language If you would like to change the user interface language, the desired language can be uploaded to the test instrument with the help of the SECU- Up update and enabling program. The software can be downloaded from the Internet at: www.gossenmetrawatt.com (Products > Software for Testers > SECU-Up). After installing the program and starting it at your PC, select the Update menu and then the desired language: Deutsch, English, Français, Italiano, Only one language can be loaded to the test instrument at any given time, and the previous language is overwritten.! Attention! Under no circumstances may the test instrument or the PC be disconnected from supply power during data transmission. No other programs may be running in Windows during the update! 4.1.2 Automatic Protection Class Selection Depending upon the type of mains plug or the connection configuration for the device under test, the test instrument recognizes the respective protection class and recommends its use for the measurement to be performed. 4.1.3 Manual or Automatic Operating Sequences Depending upon selections made in the setup menu (switch position: VDE..., menu: setup..., menu: Sequence..., parameter: Manual Sequence ), the next measurement is started automatically after the current measurement has been completed, or can only be started after manual acknowledgment. The integrated online instructions are adequate for most tests and measurements. However, the contents of these operating instructions should nevertheless be read and observed. 4.2 Help Function Online help can be queried and displayed at the LCD for all measuring and test functions, and for almost all settings. Schematic diagrams which illustrate proper connection of devices under test to the test instrument can be displayed as well. Ð Press the following key in order to query online help: Ð Press the same key again in order to exit online help. Note Online help can be queried during measurement by pressing and holding the help key. 10 GMC-I Messtechnik GmbH
4.3 Adjusting Contrast Select any switch position except for Function Test or Off. Access the Setup... menu. Enter Activate contrast adjustment. Press and hold the key. Adjust contrast. Return to the Setup menu. 4.4 Configuring Device Parameters, Setting Date and Time Device parameters and functions which are valid for all selector switch positions can be activated or deactivated in the Setup... menu with the selector switch in the Menu position (see section 8 on page 15). 4.5 Configuring Measurement and Sequence Parameters Measurement and sequence parameters, as well as functions, can be activated or deactivated in the Setup menu (switch position: VDE...) for the respective test regulation. Refer to section 11.3 on page 29 for the significance of the various parameters. 4.6 Setting Standard-Specific Limit Values (not in IEC 60974-4) Upon delivery, the limit values set forth (at the point in time of issue) in applicable national and international standards are stored to the test instrument. Limit values for each of the respective standards can be queried and changed if required with the Setup > Limit Values menu (with the selector switch in the VDE... position), but changes can only be made which result in even stricter testing than is required by the respective standard. Newly entered limit values become effective immediately. However, these are only stored to memory permanently after activating the Store function in the Setup menu for the respective standard. If the limit values set forth in the standards for certain protection classes need to be restored despite individualized settings, the All Values per Standard menu function in the Limit Values submenu must be selected and acknowledged with the Enter key. If the limit values set forth in the standards are changed, the instrument s device software can be updated via the RS232 port. 4.7 Saving Settings All of the settings and changes which have been entered to the Sequence and Limit Values menus (switch position: VDE...), and the Zero Point menu (temperature measurement) (switch position: Menu), as well as the selected contrast setting are retained until the selector switch is turned, or the test instrument is disconnected from mains power. If settings and changes should be retained even after mains power has been interrupted, they must be saved in the Setup menu for the respective test regulation or selector switch position (acknowledge the Save function). Store the contrast setting to permanent memory with the save function. GMC-I Messtechnik GmbH 11
5 Classification of Devices Under Test 5.1 Protection Classes Devices assigned to all of the following protection classes are equipped with basic insulation, and provide for protection against electrical shock by means of various additional precautions as well. Protection Class I Devices Exposed, conductive parts are connected to the protective conductor so that they are not charged with voltage if the basic insulation should fail. Protection Class I + II Devices Same as protection class I, except that they also include accessible conductive parts which are not connected to the protective conductor. Protection Class I + III Devices Same as protection class I, except that they also include protection class III features, e.g. battery operation or safety extra-low voltage (SELV/PELV). Protection Class II Devices These devices are equipped with double insulation or reinforced insulation. Protection Class II + III Devices Same as protection class II, except that they also include protection class III features, e.g. battery operation or safety extra-low voltage (SELV/PELV). Protection Class III Devices These devices are powered with safety extra-low voltage (SELV). Beyond this, no voltages are generated which exceed SELV. These devices may not be connected to the mains. Note: The DUT may only be connected to jacks 1 through 3 at the test instrument. Only visual inspection, insulation resistance measurement or line voltage measurement can be conducted (see parameter PC III U V on page 29). Parameter Classification (Draft IEC 62638 / VDE 0701-0702 with active mains) (in Sequence... menu) The SECUTEST S2N+w always tests in accordance with the strictest limit values of the respectively selected protection class. The test is failed if this limit value is exceeded. However, devices under test exist for which higher limit values are allowable. If parameter classification is activated (= x), the user is asked if higher limit values are permissible for the DUT. If Yes is entered, reevaluation ensues and the DUT may pass the test. Examples If the insulation resistance test is failed, or if interference suppression capacitors have been replaced, equivalent leakage current measurement must be performed on DUTs with heating elements in accordance with Draft IEC 62638 / VDE 0701-0702. The test is failed by a DUT with 300 k if the classification function is deactivated (= _), but it is passed with activated classification function (= x) if the question is answered accordingly. If the DUT is connected via the jacks instead of the test socket, other limit values apply because higher power consumption is possible in this case (e.g. part 1 specifies a limit value of 1 ma per kw for equivalent leakage current). See also table: Maximum Allowable Limit Values for Equivalent Leakage Current in ma on page 20. 6 Abbreviations E Electrical energy (during function test) I Differential current, residual current (during function test) I max Maximum residual current (during function test) I LC, I DL, I Probe Leakage current (differential, probe or touch current) I DI Differential current (protective conductor current during the test sequence) I DI wc Worst case differential current I EL, I-EL Equivalent leakage current I EDL, I-EDL Equivalent device leakage current (protective conductor current) I EPL, I-EPL Equivalent patient leakage current I HL, I-HL Housing leakage current (probe or touch current) I PE Protective conductor current IT system The IT system has no direct contact between active conductors and grounded parts: bodies within the electrical system are grounded. (Maximum) load current (during function test) I V(max) 12 GMC-I Messtechnik GmbH
I C L N NC P PELV PE PF R R ISO, R-ISO R-ISO NL-PE R-ISO NL-PE R-ISO LN-W R-ISO W-PE R PE, R-PE R-PE Mains S SELV U AC/DC U REF U ISO, U-ISO U LN, U-LN U MEAS Clamp current Phase conductor terminal at the DUT Neutral conductor terminal at the DUT Normal conditions Active power (during function test) Protective extra-low voltage with grounded secondary side Protective conductor of the device under test Power factor (during function test) Resistance Insulation resistance Insulation resistance: neutral conductor to PE Insulation resistance: neutral conductor to protective conductor Insulation resistance: LN to welding circuit W Insulation resistance: welding circuit W to protective conductor PE Protective conductor resistance Protective conductor resistance limit value for +mains: DUT with mains power cable -mains: DUT without mains power cable (protective conductor resistance limit value for mains power cable only = 0.1 Apparent power (during function test) Safety extra-low voltage, secondary side not grounded Alternating/direct voltage Reference voltage: voltage to which all leakage voltages make reference (as a rule nominal line voltage) Test voltage for insulation measurement Line voltage Voltage with which testing was executed. Displayed for all leakage current measurements. Probe voltage On-time (during function test) U probe t T, Temp Temperature ZVEH General Association of German Electricians 7 Connecting the Device Under Test Ð Connect the DUT in accordance with the schematic diagrams included in the online help function. Connection of the DUT to the test instrument depends upon: Type of connection: With plug ( to test socket parameter), applies to EL1 adapter as well Without plug, single or multi-phase connection ( to jacks parameter) No connection at tester ( permanent connection parameter) Whether or not an adapter is used (= parameter connection type): AT16-DI/AT32-DI (also for AT3-II S and AT3-III E for tests in selector switch position VDE 0544-4, see note on the following page) AT3-med to socket, adapter for devices which are equipped with 5-pole, 16 A CEE plugs AT3-IIIE to socket, adapter for devices which are equipped 5-pole, 32 A CEE plugs; See AT3-III operating instructions regarding the test sequence (for tests with AT3-III E in selector switch position VDE 0544-4, choose AT16-DI/AT32-DI) EL1 to probe, adapter for single-phase devices with earthing contact plug VL2E to socket, adapter for devices which are equipped with 5-pole, 16 or 32 A CEE plugs. Its protection class (I, II, III, I + II, I + III or II + III) (see section section 5.1 for meanings). Note The DUT must be switched on for all tests. Switches, relays, temperature regulators etc. must all be taken into consideration. The test instrument automatically recognizes whether or not the DUT is connected to jacks 1 through 3. The test instrument also detects whether or not a DUT has been connected to the test socket. As a default setting, the program sequence assumes that the plug from the DUT has been connected to the test socket. Note Protection Class II Devices with Protection Class I Mains Plug: If the device under test is equipped with a protection class I plug although it complies with protection class II, protection class I is recognized by the test instrument. If this is the case, switch from protection class I to protection class II in the initial menu. GMC-I Messtechnik GmbH 13
If the test instrument is unable to automatically recognize the type of connection, the recommended connection setup should be double checked and determined manually if necessary. Ð Position the cursor at the second line in the start menu for the test sequence. Ð A selection of possible connection setups can be displayed by activating the key. Ð Select the desired connection setup with the scroll key and acknowledge with the key. Note regarding the application of adapters AT3-II S and AT3-III E in selector switch position IEC 60974-4 / VDE 0544-4 In this switch position it is only possible to perform direct leakage current measurements. Differential current measurements are without function here. For this reason, the measuring cables of the respective adapter may not be connected to jacks 2 and 3 of the SECUTEST S2N+w test instrument. When entering the parameters in the second headline of the start menu (as described above), Adapter 16/32 DI must be selected as measuring connection. The question referring to the selector switch position at the adapter must be answered with no (upward cursor key ). Note regarding connection types EL1 and VL2E: After once selecting connection type EL1 or VL2E, this selection can be specified for all following tests under save in the setup menu for the test sequence in accordance with the standard, until the connection type is once again changed. Skipping the Protective Conductor Test for Fully Insulated Devices Assume that you need to test a fully insulated protection class I device (e.g. a monitor, a submersible pump etc.), which doesn t have a protective conductor which exits the device. Whether or not the protective conductor test can be skipped in this case should be decided by a qualified electrician. The protective conductor test can be skipped by pressing the key as soon as the following prompt appears: Connect the probe to the DUT s protective conductor. Testing Several Protective Conductor Connections using the Automatic Recognition of Measuring Point Change Function with the Switch in the VDE... Position During protective conductor measurement, the test instrument recognizes whether or not the test probe is in contact with the protective conductor, which is indicated by means of two different acoustic signals. This function can be set up with the switch in the Menu position in the Setup... menu with the help of the Auto Measuring Point function in the Test Sequence submenu. Protective Conductor and Insulation Resistance Measurements for Permanently Installed Devices Under Test! Attention! Deactivate the electrical system which supplies power to the device under test before connecting the test instrument! Ð Remove the mains fuses from the device under test and disconnect the neutral conductor N inside the device under test. Measuring Touch Current (absence of voltage) Make sure that the contacted parts are not grounded. 14 GMC-I Messtechnik GmbH
8 Configuring Device Parameters Menu General device parameters can be configured and saved in the Setup submenu with the selector switch in the Menu position. Select submenu and acknowledge. Select a parameter, acknowledge, change and acknowledge the change. Limit values... Settings x / = function activated / deactivated Illumination Background illumination for the LCD. One of three different conditions can be selected with the up and down scroll keys: x: continuously on, : off Numbers 1 through 9: duration in minutes after which illumination is automatically deactivated. Test Time Duration of a single test (0 255 seconds) Reference Voltage Voltage to which leakage current is related (as a rule nominal line voltage) Earth Fault During the short-circuit test, testing is also performed to determine whether or not a connection exists between L/N and PE (short-circuit to exposed conductive part). We assume that a short-circuit to an exposed conductive part exists in the event of leakage current greater than 15 ma from L/N to PE. This value should be increased for some DUTs (in particular high-current consumers), because greater leakage currents are present. Mains Wait Line voltage is initially applied to the test socket. However, testing does not begin until after the number of seconds selected in Mains Wait has elapsed, e.g. in order to suppress measured values during the warm-up phase. Auto-Mode x: Most messages are suppressed for fully automated test sequences. Test Sequence... Settings x / = function activated / deactivated Single-Fault If the single-fault condition has been activated, the test is interrupted as a failure as soon as an error occurs. Auto Class PSI Test results (passed or failed ) for the various selector switch positions are automatically assigned to the 8 statistics channels. With Operating Error Measurement results are compensated by taking operating error into consideration (measuring error). IT System Testing in IT systems can be performed by suppressing tests for U PE-N. The U PE-N test determines whether or not voltage is present at PE. (Leakage current measurement results may otherwise be distorted.) Acst Sig, Seq An acoustic signal is generated for: incorrect connection of the DUT, error in the electrical supply system and the next test step. Acst Sig, Meas An acoustic signal is generated for: measured value fluctuations and test current polarity reversal. Auto Point An acoustic signal indicates whether or not the probe is connected to the protective conductor. The test sequence is run automatically. Rapid signal frequency: probe connected Slow signal frequency: next measuring point Direct Printing See section 13 on page 41. Reports... Reports which have been saved to memory can be selected from a list with an ID number and displayed (see section 13 on page 41). Secustore Optimize the data transfer for the SECUSTORE adapter connection (in this configuration, no data can be saved to the SI module. Neither is a test report signalled to the RS232 interface. Service... Time and date settings (if a SI module is used, the same time and date must also be entered to the SI menu) Service functions (password required) GMC-I Messtechnik GmbH 15
9 Individual Measurements Menu 9.1 Measuring Protective Conductor Resistance Resistance is measured: Between each exposed conductive part of the housing and the earthing contacts at the mains and the device plug (if a removable mains connector cable is used), or the protective conductor terminal for permanently installed devices. As a 4-pole measurement Between the earthing contacts at the mains plug and the earthing contacts at the device plug for device connector cables Between the earthing contacts at the mains plug and the earthing contacts at the coupling socket for extension cables Definition Protective conductor resistance is the sum of the following resistances: Connector cable or device connector cable resistance Contact resistance at plug and terminal connections Resistance of the extension cable if applicable Connecting Protection Class I Devices to the Test Socket When the DUT is connected, resistance is measured between the protective conductor terminal at the test socket or at the PE jack, and the probe connection at the DUT (contact with conductive parts of the housing). Ð In order to measure protective conductor resistance, contact a conductive part of the housing with the probe, which is connected to the protective conductor. During measurement, the connector cable must only be moved to the extent it is accessible during repair, modification or testing. If a change in resistance occurs during the manual test step of the continuity test, it must be assumed that the protective conductor is damaged, or that one of the connector contacts is no longer in flawless condition. Selecting Polarity Test current polarity can be reversed by pressing the key. Selecting Test Current Amperage You can switch back and forth between the two test current amperages (200 ma DC or 10 A AC) by pressing the key. Testing with 10 A Test Current Maximum test time is 30 seconds (fixed value) for the 10 A test current. After this test time has elapsed, the last measured value is frozen and Data hold, measurement stopped appears at the display. If the test instrument heats up, the test cannot be repeated until after a waiting time of 1 minute has elapsed. When the 10 A test current is used, the last measurement can be repeated if the test is not passed. 16 GMC-I Messtechnik GmbH
Testing Extension Cables See section 11.4 on page 30 regarding the test sequence. Note DUT connection: PC I/II is not displayed when the test is performed individually, but rather only during the automatic test sequence. 9.2 Insulation Resistance R ISO. Definition Protection Class I Insulation resistance is measured between short-circuited mains terminals and the protective conductor. With PC II Combined Test Differential Protective Conductor Resistance Zero balancing is also possible for protective conductor measurement. With zero balancing, all subsequent measurements are adjusted with an offset such that 0 is displayed for a selected reference point which is connected to the protective conductor. When test points are contacted with the probe which are electrically connected to this reference point, differential resistance R PE between the reference point and the contacted test point is displayed. The mains enabling key must be activated during measurement in order to perform zero balancing. The acquired value can either be applied (the value remains in memory until the instrument is disconnected from mains power), permanently saved or deleted. Maximum Allowable Limit Values for Protective Conductor Resistance for Connector Cables with Lengths of up to 5 m R Open-Circuit PE R PE Test Standard Test Current Housing Housing Voltage Device Plug Mains Plug Draft IEC 62638 / VDE 0701-0702 IEC 62353:2007 > 200 ma IEC 60974-4 / 10 A~ VDE 0544-4 1 Total protective conductor resistance of max. 1 or 4 V < U L < 24 V 0.2 0.3 + 0.1 1 for each additional 7.5 m Protection Classes II and III Insulation resistance is measured between short-circuited mains terminals and external conductive parts which can be contacted with the probe. Exception for Permanently Installed Protection Class I Devices! Attention! Deactivate the electrical system which supplies power to the device under test before connecting the test instrument! Ð Remove the mains fuses from the device under test and disconnect neutral conductor N inside the device under test. Ð Connect the probe to phase conductor L at the device under test in order to measure insulation resistance. GMC-I Messtechnik GmbH 17
Sequence! Attention! Insulation Resistance Measurement (equivalent leakage current) Testing is conducted with up to 500 V. Current limiting is utilized (I < 3.5 ma), but if the terminals (3 or 2) are touched, electrical shock may occur which could result in consequential accidents. If the DUT is connected via jacks 1 through 3, special care must be taken to avoid contact with open cables. Note All switches at the device under test must be set to the on position during measurement of insulation resistance, including temperature controlled switches and temperature regulators as well. Measurement must be performed in all program steps for devices equipped with program controllers. Note When insulation measurement is first started from the menu, nominal voltage is always set to 500 V. Open-circuit voltage is always greater than nominal voltage. Minimum Allowable Limit Values for Insulation Resistance Test Standard Draft IEC 62638 / VDE 0701-0702 IEC 60974-4 / VDE 0544-4 Test Voltage 500 V LN PE LN Probe R ISO Probe PE PC III Heating 1M 2M 5M 0.25 M 0.3 M * 2M 5M 5M * With activated heating elements (if heating power > 3 kw and R ISO < 0.3 M : leakage current measurement is required) R-ISO Start measurement. Notes Insulation resistance and/or leakage current must be measured at all exposed, conductive parts for protection class II and III devices, as well as for battery powered devices. Batteries must be disconnected during testing of battery powered devices. During the test of the primary side LN to standard probe 1 (jacks 4-5), the protective conductor of the test socket is connected with standard probe 1. If the test is to be conducted without the protective conductor, the test may not be performed via the test socket, but must be performed via a second probe connection at jacks 2 and 3. Nominal voltage is 500 V DC in this case. Nominal voltage can be adjusted within a range of 50 V to 550 V DC. 18 GMC-I Messtechnik GmbH
9.3 Measuring Leakage Current! Attention! It is absolutely essential to assure that the device under test is operated with line voltage during performance of the leakage current measurement. Exposed conductive parts may conduct dangerous contact voltage during testing, and may not under any circumstances be touched (mains power is disconnected if leakage current exceeds approx. 10 ma). Select the I xx measurement and start. Each time line voltage is applied to the test socket, L and N are reversed, if this function has been selected in the leakage current menu (see section 9.3 on page 19). Frequency response is taken into consideration in accordance with the diagram to the right when leakage current is measured. U(f) U(f=10) Relative Magnitude (db): 9.3.1 Touch Current I T (welding circuit leakage current) Current which flows from housing parts which are not connected to the protective conductor via an A external conductive connection to earth or another part of the housing. Flow of current via the protective conductor is excluded in this case. The current s AC component is measured. The DC component 10 10 2 10 3 10 4 10 5 10 6 Frequency (f) in Hz can also be measured by means of an individual measurement (but not with a test sequence). +20 0-20 -40-60 L 1 N 2 1 Test socket (without protective conductor contact) 2 Device housing 9.3.2 Protective Conductor Current (primary leakage current), Differential Current Method (I DI ) Sum of instantaneous current values which flow via the L and N conductors at the device s mains connection (also known as differential current). Differential current is practically identical to fault current in the event of an error. Fault current: Current which is caused by an insulation defect, and which flows via the defective point. Attention: Differential current includes touch current as well. Maximum Allowable Limit Values in ma Test Standard I PE (I DI ) Draft IEC 62638 / VDE 0701-0702 SC I: 3.5 1 ma/kw * * For devices with heating power of greater than 3.5 kw Note 1: Devices which are not equipped with accessible parts that are connected to the protective conductor, and which comply with requirements for touch current and, if applicable, patient leakage current, e.g. computer equipment with shielded power pack Note 2: Permanently connected devices with protective conductor Note 3: Portable x-ray devices with mineral insulation Key I T Touch current (welding circuit leakage current) I PE Current in the protective conductor (primary leakage current) I T NC 0.5 IEC 60974-4 5 ma 10 ma GMC-I Messtechnik GmbH 19
9.4 Equivalent Leakage Current General Measurement of equivalent leakage current is required for: Draft IEC 62638 / VDE 0701-0702 after passing the insulation test Equivalent Device Leakage Current I EDL. IEC 62353 (VDE 0751-1) Measurement of equivalent device leakage current is required for: Electrical medial devices in accordance with IEC 62353 (VDE 0751-1) Prerequisites A high-impedance power supply is connected between the shortcircuited mains terminals and all exposed metal parts of the housing (which are connected to one another). Measurement Current which flows over the insulation at the device under test is measured. L ma Test socket N Device ~ Under Test ~ ma Probe PE L N PE Probe 4-5 Test socket Test socket Device Under Test 4-5 Test socket Equivalent Patient Leakage Current I I EPL, IEC 62353 (VDE 0751-1) Prerequisites A high-impedance power supply L is connected between respectively short-circuited L, N, PE and PE N the probe. ~ Measurement Measurement is always performed using an AC source with current limiting. Differing mains voltages are taken into consideration. ma Probe Maximum Allowable Limit Values for Equivalent Leakage Current in ma Test Standard Draft IEC 62638 / VDE 0701-0702 IEC 62353: 2007 (VDE 0751-1) I EL I EDL I EPL SC I: 3.5 1 ma/kw 1 PC II: 0.5 I EL Equivalent leakage current I EDL Equivalent device leakage current I EPL Equivalent patient leakage current PE Protective conductor 1 For devices with heating power 3.5 kw PC II 0.2 SC I (PE or parts connected to PE) 1 Permanently connected devices with PE 10 Portable x-ray devices with additional PE 5 Portable x-ray devices without additional PE 2 Devices with mineral insulation 5 Test socket Device Under Test 4-5 Type BF Type CF 5 0.05 20 GMC-I Messtechnik GmbH
Connection Refer to the schematic diagrams included with the online help for connection instructions. Equivalent Leakage Current I EDL Draft IEC 62638 / VDE 0701-0702 / 2 K Connection Exception for Permanently Installed Protection Class I Devices Current is measured between the probe, with which the L and N conductors must be contacted, and the protective conductor terminal PE at the device under test for permanently installed protection class I devices under test.! Attention! Deactivate the electrical system which supplies power to the device under test before connecting the test instrument! Ð Remove the mains fuses from the device under test and disconnect neutral conductor N inside the device under test. Ð Connect the probe to phase conductor L and neutral conductor N at the device under test in order to measure equivalent leakage current. Special Case: Connection of Multiphase Devices Equivalent leakage current measurements is not suitable for multiphase devices. Select and start the I-EL measurement. Equivalent leakage current is measured between short-circuited N and L, and the protective conductor PE. Measuring circuit resistance is equal to 2 k for Draft IEC 62638 / VDE 0701-0702 for simulation of mean body resistance of a human being. Equivalent Device Leakage Current I EDL for IEC 62353 / 1 K Select and start the I-EDL measurement. Equivalent device leakage current is measured between short-circuited N and L, and the probe. Measuring circuit resistance is equal to 1 k1 k for IEC 62353 for the simulation of mean patient resistance. Refer to section 16.2 regarding evaluation of measured values for equivalent leakage current. Equivalent Patient Leakage Current I I EPL IEC 62353 Sequence Current, which would flow during leakage current measurement conducted in accordance with device regulations at nominal voltage, is displayed during this type of equivalent leakage current measurement. Leakage current measurement in accordance with the respective device regulations is frequently not possible, because the device would have to be set up in an electrically isolated fashion, or connected to an earth isolated power supply to this end. Select and start the I-EPL measurement. Equivalent patient leakage current is measured between short-circuited L, N, PE and the probe. GMC-I Messtechnik GmbH 21
9.5 Probe Voltage U probe Max. 300 V Voltage is measured between the mains PE terminal at the test instrument and the probe. In this case the probe can also be used as a phase finder. The DUT must be started up with the key (14) before performing measurement. Start the U Probe measurement. 9.6 Alternating / Direct Voltage U AC/DC Max. 253 V (open circuit voltage U 0 ) Direct, alternating and pulsating voltages of up to 253 V can be measured between connector jacks 2 and 3. Switching amongst minimum, maximum and current measured value is also possible with the key. This is especially useful in combination with the SECULOAD test adapter for welding units (article no. Z745V).! Attention! As of firmware version 8.12, differentiation is made between 2 sequences: Sequence 1 DUT not connected to test socket (permanently connected) Ð Set the selector switch to Menu and select the U AC/DC measurement. Ð Connect the measurement cables to jacks 2 and 3. Ð Contact the measuring point with the test probes. Ð Read the measured values. Ð Remove the test probes from the measuring point and disconnect the measurement cable from jacks 2 and 3. Ð Press the enter key in order to return to the menu. Sequence 2 DUT connected to the test socket The following sequence of test steps must be adhered to: Initially, nothing may be connected to jacks 1 through 3. (Jacks 2 and 3 are shortcircuited for all measurements conducted at the test socket. Exception: The shortcircuit is eliminated as soon as the explicit prompt to connect the measurement cable appears at the display.) Ð Remove any cables which are connected to jacks 1 through 3. Ð Connect the device under test to the test socket. Ð Set the selector switch to Menu and select the U AC/DC measurement. Ð Switch the device under test on (short-circuit test is conducted). Ð Start up the DUT by connecting line voltage to the test socket with the switch (14). Ð It is absolutely essential to observe the following: Do not connect the measurement cable until the following prompt appears at the display: Connect measurement cable to jacks 2 and 3 for voltage measurement. Ð Contact the measuring point with the test probes. Ð Read the measured values. Ð Remove the test probes from the measuring point and disconnect the measurement cable from jacks 2 and 3. Ð Press the enter key in order to return to the menu. 22 GMC-I Messtechnik GmbH
Measurement of Safety Extra-Low Voltage (see Sequence no. 2 on page 22) Voltage can be applied to the DUT via the test socket by pressing the key (14), for example in order to be able to measure safety extra-low voltage at the DUT s output.! Attention! Voltage measured at the DUT s output must be safety extra-low voltage which is electrically isolated from the mains, because an overvoltage protection device included within the installation might otherwise be tripped. 9.8 Measurements with Accessories 9.8.1 Alternating Current I Z with Current Clamp Connection 9.7 Resistance R Resistance of up to 150 k can be measured between jacks 1 and 2. Alternating current can be measured in two measuring ranges (1 ma 10 A ~, 1 A 100 A~) with a current-voltage transformer clamp connected to jacks 2 and 3 (e.g. the WZ12C). Select and start the R measurement. Start the I Z measurement. Select measuring range. GMC-I Messtechnik GmbH 23
9.9 Protective Conductor Resistance R PE via Current Clamp Connection 9.9.1 Temperature T with Pt100/1000 Sensor Connection Protective conductor resistance can be determined with the WZ12C current clamp transformer. P: potential conductor for 4-pole measurement The potential conductor must be connected to the outgoing protective conductor in the distributor. Without potential conductor P, conductor resistance is measured from the DUT to the test instrument. This value may differ greatly from actual protective conductor resistance, because the supply line including test instrument installation is measured as well. With the potential conductor, resistance is measured from the probe connection to contact point P at the protective conductor. Select and start the R SL measurement. Temperature can be measured within a range of -200 C +850 C with a Pt100 or Pt1000 sensor (default setting) connected to jacks 1 and 2. Select and start the Temp measurement. Select Pt100 or Pt1000 with the select measuring range function key. The temperature unit of measure can be selected in the TEMPERATURE setup menu. Selection can be made amongst C (Celsius), F (Fahrenheit) or Kelvin. Zero balancing is also accessible via the TEM- PERATURE setup menu. 24 GMC-I Messtechnik GmbH
Zero Balancing Sensor cable resistance can be compensated with this function: Ð Short circuit the ends of the sensor leads and determine resistance as shown below. Zero Point The determined value can be stored directly ( key) or changed first. The data entry menu is opened with the key. Ð Change the measured value manually with the help of the and keys. Ð Press the key in order to acknowledge the selected value, and to display other menu functions at the bottom of the window. Save the selected value by activating the store value key ( ), before exiting the balancing function with the key. The delete value command can only be accessed via the change value menu. The no zero balancing setting is saved at the same time by activating the key. GMC-I Messtechnik GmbH 25
10 Function Test Function Test The device under test can be subjected to a function test with line voltage via the integrated test socket. In addition to testing with the selector switch in the function test position, or with the Function parameter in the Menu position, a function test can also be performed immediately after safety testing has been passed in accordance with the selected standard (not possible for protection class III devices).! Attention! The function test may only be performed after the DUT has successfully passed the safety test. Note Each time line voltage is applied to the test socket, phase conductor L and neutral conductor N are automatically reversed, if the mains polarity reversal function has been activated (= x). Switch position: VDE... > menu: Setup... > menu: Sequence... > parameter: Polarity Reversal or > menu: Limit Values... > parameter: Polarity Reversal. Note The function test is only possible if the device under test has been connected to the test socket (21). Measurement The function test includes the following measurements: Voltage U LN between the L and N conductors Differential current I (corresponds to fault current between L and N) Load current I L Active power P Apparent power S (calculated) Power factor PF (cos calculated, display > 10 W) Electrical energy W On-time t for U LN at the socket (21) The following values are also displayed for all selector switch positions except for Menu and Setup, after the function test has been completed: Maximum residual current I max Maximum load current I Lmax Maximum active power P max Power factor is calculated from active power and apparent power. Power factor corresponds to cos for sinusoidal quantities (line voltage and load current).! Attention! Starting the Function Test For reasons of safety*, the device under test must be switched off before the function test is started. This precaution prevents inadvertent start-up of a device under test which may represent a hazard during operation, e.g. a circular saw or a disc grinder. Ending the Function Test After completion of the function test, devices under test must be turned off with their own switch especially devices with relatively high inductivity. * And to avoid increased wear of the mains relay in the test instrument 26 GMC-I Messtechnik GmbH
Short-Circuit Test 1 Test for shorts between conductors N and L 2 Test to determine whether or not the N or L conductors are shortcircuited to the protective conductor The test socket can be rendered voltage-free with the key (14), or the function test can be ended with the key (12). Note A short-circuit at the device under test is recognized automatically by the test instrument. A message appears at the display (9), and the function test is disabled. If the lamp blinks (15), line voltage can be switched to the test socket with the key (14), and the measurement can be started. If the lamp (15) is lit continuously, line voltage is present at the test socket. GMC-I Messtechnik GmbH 27
11 Measurements Switch Position: Standard (VDE...) If measurements need to be performed in accordance with given standards which require specific tests, and if results need to be documented with a test report, an automatic test sequence is advisable instead of individual measurements. Ð Connect the SECUTEST S2N+w to mains power. A mains connection test is initialized (see section 3.2 on page 9). Ð Connect the DUT to the test socket at the SECUTEST S2N+w (see section 7 on page 13). The test instrument initializes connection type recognition. Ð Set the selector switch to the appropriate standard. If the test instrument has been connected via the test socket, protection class checking is executed. Otherwise, the protection class must be specified manually. Move the cursor up into the third line in the initial window with the key, and acknowledge with the key. A protection class can now be selected with the and keys and acknowledged with the key. Ð The test sequence can be configured in the Setup menu, limit values can be changed if necessary and database options can be selected. Ð The test sequence is started by selecting Start test and acknowledging with the key (see following chapter, Test Sequences ). Tests which have already been included in chapters 9 through 14 are not described here again. 11.1 Test Sequences Test sequences for the various standards are always run in the same order, assuming that the device under test has been properly connected and the mains connection test has been passed. The test sequence can be run step by step with manual activation of each subsequent step if this function has been specified, or automatically. Step by step manual operation can be selected if Manual Sequence has been activated under Sequence in the setup menu in the initial window. Visual inspection: If Visual Inspection has been activated under Sequence in the setup menu in the initial window. If a part is recognized as defective by the user, it must be identified as such by selecting it with the cursor and acknowledging with the key. Protective conductor measurement (for SC I devices under test only) Note If protective conductor connection is not possible, the measurement can be skipped by pressing the key (when connect probe to protective conductor appears at the display). Evaluation of protective conductor testing Measure insulation resistances IEC 60974-4: Only insofar as insulation resistance measurements have been selected in the initial window Draft IEC 62638 / VDE 0701-0702: only if R-ISO LN-PE is activated in the initial window Evaluation of insulation test Leakage current measurement Evaluation of each individual leakage current measurement (see also section 16.2) Evaluation of the overall test Perform function test if required: The function test can be performed each time a safety test has been successfully completed. The blinking signal lamp indicates that the function test should be started. Beyond this, the function test can also be started from the Function Test selector switch position. See section 10 on page 26 regarding performance of the function test. Display test results (the worst measured values for the test sequence). Save test results and print if required. 28 GMC-I Messtechnik GmbH
11.2 Setting Up Test Sequences All possible sequence settings for all of the regulations are listed below. Select the Sequence... menu and acknowledge. Select the Setup... menu from the initial program window and acknowledge Repair tests, periodic testing Save All of the settings in the setup menu, i.e. configuration of measuring parameters and current limit values, can be saved with this command. These values remain active even after setting the selector switch to a different position, and after disconnection from mains power. Sequence See below Limit values See section 4.6 on page 11 Database Start with ID no. x: Before each measurement is started, an entry prompt appears requesting entry of an ID no. An individual number can be entered here (max. 20 characters) via the keypad at the SI module (option) or read in with a barcode scanner (option), or the type of DUT can be selected directly from a list. In case of incorrect entry: Only deletion of complete lines is possible, and only be means of the key at the test instrument. ID no. = test sequence (DBmed option) See section 12 on page 40. Select a parameter, acknowledge, change and acknowledge the change. Sequence (general parameters) Visual Inspection This menu appears at the very beginning of the test sequence. Manual Sequence Each test step must be acknowledged with the key (see test sequence in section 8 on page 15 regarding test duration for automatic sequence). Auto-Store After testing is finished, test data are automatically stored to the SECUTEST S2N+w (Dbmed option), or to the SI module (accessory). Polarity Reversal Test with mains: L an N are reversed each time line voltage is applied to the test socket. Classification Test with mains: Questions regarding classification appear if limit values are exceeded (see section 5 on page 12). PC III U V Supply voltage is measured instead of insulation resistance for active devices under test. R-PE AC > 10 A The protective conductor test is conducted with 10 A AC. No Leakage Current No leakage current measurements are performed. 11.3 Configuring Measuring Parameters Depending upon the test regulation, various measuring parameters can be configured for the test sequence (settings: x / = function activated / deactivated). All possible parameters for all of the regulations are listed below. The Sequence... menu is accessed via the setup parameter in the initial program window for the respective regulation. GMC-I Messtechnik GmbH 29
11.4 Testing Extension Cables in Accordance with Draft IEC 62638 / VDE 0701-0702 x: Single and multi-phase extension cables or connector cables which are longer than 5 m can also be tested with the help of adapters, either separately or in combination with a device. EL1: Adapter for single-phase extension cables VL2E, AT3-IIIE: Adapter for single and 3-phase extension cables with and without CEE connection The following measurements can be performed in accordance with the above mentioned standard: Protective conductor resistance R PE Part 1: Test current: 200 ma DC Appendices: Test current: 10 A AC Insulation resistance measurement R ISO Extension Cables up to 5 m Long Protective conductor resistance between the earthing contact at the mains plug and all exposed metal parts may not exceed 0.3 for protection class I devices. Extension and Connector Cables Longer than 5 m Per Draft IEC 62638 / VDE 0701-0702, additional cable resistance of 0.1 is permissible for each additional 7.5 m as of a length of 5 m, but is limited to a maximum of 1. Resistance testing for cables longer than 5 m is thus advisable (see also limit values on page 17). For cables with a rated current of greater than 16 A, wire cross-section must be taken into consideration during measurement (use of 3-phase adapter only, not EL1). Connecting the Extension Cable or the Multiple Outlet Device Under Test = PROBE 5 4 Extension cable (21) EL1 SECUTEST Test socket Cable Reel Features Sequence parameter: Manual sequence must be activated here. Visual inspection: The cable has to be unreeled to this end. Protective conductor resistance measurement: Contact the first outlet with the EL1 adapter. Each time you are ready to contact the next outlet, press the key to repeat the test. Check connection parameters and start test. To Socket This is the default setting. Refer to section 7 on page 13 for other types of connection. Repair Select repair or periodic testing. Class I Extension cables are usually protection class I. For this reason, no selection is possible here. ID No. See parameters database in section 11.2 on page 29. Setup Refer to section 11.2 on page 29 regarding setup of the measuring sequence. For conductors with a rated current of > 16 A, the cross section (Diameter) has to be taken into account during measurement. The cross section is only queried if a 3- phase current adapter has been connected and the connection parameter has been set to VL2E or AT3-IIIE. Upon entering the cross section, the limit value for the protective conductor resistance is recalculated. 30 GMC-I Messtechnik GmbH
Test Sequence per Extension Cable (Draft IEC 62638 / VDE 0701-0702) Start parameter: > select connection, > repair or periodic testing, > PC I device under test (fixed setting) Sequence parameter: > visual inspection yes/no (X/ ), > manual sequence yes/no (X/ ), > 10 A test current: R-PE AC > 10 A yes/no (X/ ) Yes No No No No No Visual inspection Yes/No Short-circuit at DUT? No PC I: RPE Yes RISO Test Yes Continuity, short-circuit** Yes Yes Start function test Switch DUT on > Enter cable length, > and wire cross-section Test Contact all accessible conductive part with the probe. The test can be repeated as often as desired for various protective conductor parts with the manual sequence*. EL1: Insert the probe plug on the EL1 adapter into probe jacks 4 and 5 at the SECUTEST. VL2E: Insert the probe tip which is connected to probe jacks 4 and 5 at the SECUTEST into the PE socket at the VL2E adapter. AT3-IIIE: Select EL1 as correction type. Depending on the type of connection to the attached plug at the AT3-IIIE, contact the appropriate probe socket with the SECUTEST probe tip. Observe the operating instructions for the utilized adapter! Switch line voltage to test socket, start function test Dashed lines: The test is only run if it has been activated in the initial window or in the Setup menu under Sequence... * If it is not clear whether or not all accessible conductive parts are connected to each other or to the protective conductor, testing can be conducted in the manual operating mode. ** When conducting the continuity, short-circuit and reversed wires step for extension cables, the EL1 or VL2E accessory adapter must be used and connection type EL1 or VL2E must be selected instead of test socket. Display results, save/print report GMC-I Messtechnik GmbH 31
11.5 Testing Devices per Draft IEC 62638 / VDE 0701-0702 Passive The following measurements can be performed in accordance with the above mentioned standard: Protective conductor resistance R PE (permanently connected or via plug) Part 1: Test current: 200 ma DC Appendices:Test current: 10 A AC (SECUTEST S2N+10 only) Insulation measurement R ISO (can be deactivated, e.g. if there is any danger of damaging voltage-sensitive components in data processing equipment) Equivalent Leakage Current Part 1 The following safety class I through III appliances and electrical equipment can be tested in this selector switch position, for example: Devices with electric motors Electrical heating devices Electrical tools Light fixtures Appendices (previously part 260) Appendix E: Electric tools Passive Test Sequence The passive test sequence can be used if the device under test does not include any line voltage dependent switching devices. Check connection parameters and start test. To Socket Repair Class R-ISO LN-PE ID No. Setup This is the default setting. Refer to section 7 on page 13 for other types of connection. Here you can specify whether the test is being conducted after completion of repairs or as a periodic test. If the device under test is connected to the test socket, protection class checking is executed (PC I or PC II). Otherwise, the protection class must be specified manually. X: Insulation resistance is measured between the short-circuited L and N conductors, and protective conductor PE. See parameters database in section 11.2 on page 29. Refer to section 11.2 on page 29 regarding setup of the measuring sequence. 32 GMC-I Messtechnik GmbH
Test Sequence per Draft IEC 62638 / VDE 0701-0702 Passive Start parameter: > select connection, > repair or periodic test, > classify DUT (PC I, II or III), > insulation test yes/no (X/ ) Sequence parameter: > visual inspection yes/no (X/ ), > 10 A test current: R-PE AC > 10 A yes/no (X/ ) Yes No No No No No Visual inspection Yes/No Short-circuit at DUT? PC I: RPE RISO IEA Test No Yes Yes Yes Yes Start function test Switch DUT on Test Protection class I only: Contact all accessible conductive part with the probe. The test can be repeated as often as desired for various protective conductor parts with the manual sequence*. Switch line voltage to test socket, start function test Dashed lines: The test is only run if it has been activated in the initial window or in the Setup menu under Sequence... * If it is not clear whether or not all accessible conductive parts are connected to each other or to the protective conductor, testing can be conducted in the manual operating mode. Display results, save/print report GMC-I Messtechnik GmbH 33
11.6 Testing Devices per Draft IEC 62638 / VDE 0701-0702 Active The following measurements can be performed in accordance with the above mentioned standard: Protective conductor R PE (permanent connection or with plug) Part 1: Test current: 200 ma DC Appendices: Test current: 10 A AC Insulation measurement R ISO (can be deactivated, e.g. if there is any danger of damaging voltage-sensitive components in data processing equipment) plus equivalent leakage current or Touch current for protection class II or Differential Current Active Test Sequence The active test sequence is used if the device under test includes line voltage dependent switching devices. Check connection parameters and start test. To Socket Repair Class R-ISO LN-PE ID No. Setup This is the default setting. Refer to section 7 on page 13 for other types of connection. Here you can specify whether the test is being conducted after completion of repairs or as a periodic test. If the device under test is connected to the test socket, protection class checking is executed (PC I or PC II). Otherwise, the protection class must be specified manually. X: Insulation resistance is measured between the short-circuited L and N conductors, and protective conductor PE. See parameters database in section 11.2 on page 29. Refer to section 11.2 on page 29 regarding setup of the measuring sequence. 34 GMC-I Messtechnik GmbH
Test Sequence per Draft IEC 62638 / VDE 0701-0702 Active Start parameter: > select connection, > repair or periodic test, > classify DUT (PC I, II or III), > insulation test yes/no (X/ ) Yes Visual inspection Yes/No Short-circuit at DUT? Switch DUT on Test Dashed lines: The test is only run if it has been activated in the initial program window, or in the Setup menu under Sequence... No No PC I: RPE Yes If any doubts exist about measuring insulation resistance Contact all exposed, conductive parts with the probe. R ISO and I LC No R ISO and I LC OK: Yes No R ISO I LC * U AC/DC Yes/No Start function test I LC * Yes No Voltage measured at the DUT s output must be safety extralow voltage which is electrically isolated from the mains, because an overvoltage protection device included within the installation might otherwise be tripped. Switch line voltage to test socket, start function test * Differential current I DI, touch current (direct) I T Display results, save/print report GMC-I Messtechnik GmbH 35
11.7 Testing Devices per Draft IEC 62638 / VDE 0701-0702 ICT Testing protection class I and II data processing equipment and office machines as individual devices and in combination with one another. The following measurements can be performed in accordance with the above mentioned standard: Protective conductor R PE (permanent connection or with plug) Test current: DC 200 ma Touch current and differential current (direct measurement and differential current method) According to DIN VDE 0701, the device s protective conductor must be tested after maintenance, repair or modification of data processing equipment and office machines, and exposed, conductive parts must be tested for the absence of voltage. This applies to: Protection class I devices for all exposed, conductive parts which are accessible to the user, and which are not connected to the protective conductor Protection class II devices (totally insulated devices) for all exposed, conductive parts which are accessible to the user - With the mains plug poled in both directions Setting Up the Test Sequence See section 11.5 regarding the test sequence. Special Parameters Combined Testing Protection class I and II devices can be tested individually or in combination. All protective conductor connections are tested first for interconnected safety class I devices, and then as is also the case for interconnected safety class II devices all exposed, conductive parts. Connecting the Device Under Test Ð Connect the test instrument and the DUT as described below: Connect both devices to separate mains outlets. The outlets to which the test instrument and the safety class I DUT are connected must share a common protective conductor! Or connect the test instrument to the mains and the DUT to the test socket at the test instrument. Data Processing / Office Machines Permanently connected or with plug To test socket at the test instrument The requirement for testing with the mains plug poled in both directions can be fulfilled by connecting the DUT to the test socket at the instrument, and by activating mains polarity reversal under Setup Sequence in the setup menu. Each time the key (14) is activated, phase conductor L and neutral conductor N are reversed at the test socket.! Attention! Testing with mains polarity reversal or with the mains plug poled in both directions results in interruption of supply power to the affected data processing equipment or office machine. This test may thus only be conducted with the consent of the operator of the data processing equipment or office machine. If the DUT is defective, the electrical system s RCCB may be tripped during testing which would also result in interruption of supply power to the affected equipment or office machine. The manufacturer of the test instrument assumes no liability for loss of data or other damage which results from use of the test instrument. 36 GMC-I Messtechnik GmbH
Test Sequence per Draft IEC 62638 / VDE 0701-0702 Symbol ICT Start parameter: > select connection, > classify DUT (PC I, II or III), > combined test X/ (yes/no) Yes Visual inspection Yes/No Short-circuit at DUT? Switch DUT on Test Dashed lines: The test is only run if it has been activated in the initial program window, or in the Setup menu under Sequence... No No PC I: RPE Yes Contact all accessible conductive part with the probe. The test can be repeated as often as desired for various protective conductor parts with the manual sequence*. * If it is not clear whether or not all accessible conductive parts are connected to each other or to the protective conductor, testing can be conducted in the manual operating mode. No IL Yes Switch line voltage to test socket, start measurement. Reverse mains polarity, perform measurement again. No Start function test Switch line voltage to test socket, start function test Display results (for combination testing: additional display of differential resistance), save/print report GMC-I Messtechnik GmbH 37
11.8 Testing Welding Equipment per IEC 60974-4 The following measurements can be performed in accordance with the above mentioned standard: Protective conductor resistance R PE Test current: 200 ma DC Insulation measurements (can be additionally activated) R-ISO LN-PE (insulation resistance LN to protective conductor PE) LN at test socket to probe 1 at jacks 4-5 Check connection parameters and start test. R-ISO LN-W (insulation resistance, LN to welding circuit W) Probe 2 at jacks 2-3 to probe 1 at jacks 4-5 R-ISO W-PE (insulation resistance: welding circuit W to PE Probe 1 at jacks 4-5 to PE (test socket) Primary leakage current Touch current Measurement of open circuit voltage with the SECULOAD* test adapter Leakage current is recalculated to reference voltage (see limit values, section 8 on page 15). Reference voltage must be matched to the supply voltage range. * Accessory, Z745V (not included in scope of delivery) Setting of limit value for open circuit voltage Before measuring the open circuit voltage, the setpoint value of the open circuit voltage specified in the name plate of the DUT can be adopted. AT16/32 to Socket Test Type Class R-ISO LN-PE R-ISO LN-W R-ISO W-PE ID No. Setup This is the default setting. Refer to section 7 on page 13 for other types of connection. Periodic testing or repair If the device under test is connected to the test socket, protection class checking is executed (PC I + III or PC II + III). In all other cases, or if it is not clear whether or not all exposed, conductive parts are connected to one another or to the protective conductor, the protection class can be selected manually. X: Insulation resistance is measured between the short-circuited L and N conductors at the test socket and protective conductor PE (probe 1 at jacks 4-5). X: Insulation resistance is measured between the short-circuited L and N conductors (probe 2 at jacks 2-3), and welding circuit W (probe 1 at jacks 4-5). X: Insulation resistance is measured between welding circuit W (probe 1 at jacks 4-5) and protective conductor PE (test socket). See parameters database in section 11.2 on page 29. Refer to section 11.2 on page 29 regarding setup of the measuring sequence. 38 GMC-I Messtechnik GmbH
Test Sequence per IEC 60974-4 Start parameter: > select connection, > periodic test or repair > classify DUT (PC I + III or PC II + III) > DUT with (X) / without ( ) R-ISO LN-PE Yes No No Visual inspection Yes/No Short-circuit at DUT? No PC I: R PE Yes (R PE < 0.3 ) R ISO Yes (I < 10 ma) Ð Classify DUT Test Ð Contact all accessible conductive parts with the probe. The test can be repeated as often as desired for various protective conductor parts with the manual sequence*. Insulation resistance measurements if R-ISO... = X Dashed lines: The test is only run: If it has been activated in the initial program window, or in the Setup menu under Sequence... or If at all possible * If it is not clear whether or not all accessible conductive parts are connected to each other or to the protective conductor, testing can be conducted in the manual operating mode. 1) Test without using the probe (R ISO > 2.5 M ). 2) Ð Contact L and N at DUT s mains plug with probe 2, and welding circuit with probe 1 (R ISO > 5 M ). 3) Ð Contact welding circuit connections, one after the other, with probe 1 (R ISO > 2.5 M ). No I Ð Start up the DUT Ð switch the DUT on. 1) I-L, primary circuit ( I method) (I ): primary leakage current 2) I-L, welding circuit (I ): contact each welding circuit connection with probe Ð switch DUT off. Ð Start up DUT with reversed mains polarity Ð switch DUT on. 3) I-L, primary circuit ( I method) (I ): primary leakage current 4) I-L, welding circuit (direct method) (I ): Ð contact each welding circuit connection with probe. No Display results, save/print report U~ U U Yes (I < 10 ma) Ð Connect measurement input at the SECULOAD test adapter to welding circuit output. Ð Connect measurement output at SECULOAD test adapter to jacks 2 and 3 for voltage. Measurement of open circuit voltage: momentary supply voltage, PC III Ð Remove measurement cable from jacks 2 and 3 Ð switch the DUT off. GMC-I Messtechnik GmbH 39
12 Saving Data to the SI Module (accessory) and Database Operations 12.1 Saving Measurement Data to the SI Module (accessory) After a measurement has been completed test passed / not passed is displayed the measurement data can be saved to memory at the SI module. Ð Press the STORE key on the SI module to this end. An entry field appears. Ð You can enter a comment for the measurement here, and/or an ID number. Ð Press the STORE key once again in order to save the measurement data along with your comment. Saving data... appears at the display. A complete description is included in the operating instructions for the SI module in the section entitled Displaying, Printing and Storing Reports. 12.2 Storing Test Results to the SECUTEST S2N+w If a SI module has not been connected, up to 125 test reports are saved to the test instrument (without function test values or entries regarding the DUT). The reports can be viewed as required at the instrument and can be printed out, for example with the help of a terminal program. The reports are sorted by time and date and are displayed with the ID number. If no ID number was assigned, date and time are automatically saved instead. 40 GMC-I Messtechnik GmbH
13 Storing Test Results to the Test Instrument and Printing them in Report Form Connect the SECUSTORE memory adapter to the test instrument via the RS232 port. The SI module may not be connected. Direct Printing After completion of each test (individual test or at the end of a test sequence), test results are read out directly via the RS232 port. If a SECUSTORE memory adapter has been connected, the test results are saved to memory in the SECUSTORE. In this operating mode no results can be saved to the internal memory or the SI module. You can switch from any of the displayed test results (1 st page) to the Report menu with the help of the key. Measurement results for the momentary test can be stored to memory at the test instrument, the results of the momentary test can be printed out to the corresponding report form, previously stored test results can be queried (scroll: DBmed option, see section 12) and all saved measurement results can be printed out from this menu. The matching report form is automatically selected for the standard chosen with the rotary switch. GMC-I Messtechnik GmbH 41