Model 3526-B Digi-Probe Multimeter CAUTION: Read, understand and follow all Safety Rules and Operating Instructions in this instruction manual before using this product. 84-797 Rev A
The Model 3526-B has been designed with your safety in mind. However, no design can completely protect against incorrect use. Electrical circuits can be dangerous and/or lethal when lack of caution or poor safety practices are used. Read the Manual Read this Instruction manual carefully and completely. Voltages and currents within the capability of this multimeter can be hazardous. Follow the instructions in this manual for every measurement. Read and understand the general instructions before attempting to use this meter. Do not exceed the limits of this meter. Safety Check Double check the switch setting and lead connections before making measurements. Are you following all of the instructions? Disconnect the meter or turn off the power before changing switch positions. Do not connect to circuits with voltage present when switch is in any ohms or current position. When replacing fuses, use only specified type fuses and insert in correct fuse holder. Do Not Touch Do not touch exposed wiring, connections, or other "live" parts of an electrical circuit. If in doubt, check the circuit first for voltage before touching it. Turn off the power to a circuit before connecting test probes to it. Be sure there is no voltage present before you touch the circuit. Do not use cracked or broken test leads. High Voltage is Dangerous Always start with the power off. Be sure there is no voltage present before making connections to the circuit. Do not touch the meter, its leads, or any part of the circuit while it is on. Before disconnecting the meter, turn the circuit off and wait for the meter to "zero". Distribution Circuits Pack A Punch In high energy circuits such as distribution Transformers and bus bars, dangerous arcs of explosive nature can occur if the circuit is shorted. Do not use this meter in circuits of this type. Only use a meter with a Category III rating at the appropriate voltage.
MODEL 3526-B SPECIFICATIONS Safety Is No Accident! Ranges Resolution Accuracy DC Voltage 300mV, 3V 30,300, 500V 100μV +(1.5% reading + 5 digits) +(1.0% reading + 2 digits Input Impedance 10MΩ Max Input 500V AC/DC AC Voltage 3, 30, 300, 500V 1mV +(1.5% reading + 8 digits) AC Freq. Response: DC Current 30, 300mA 10μA +(1.5% reading + 3 digits) 40Hz to 400Hz AC Current 30, 300mA 10μA +(2.0% reading + 5 digits) Average responding Resistance 300,3k,30k,300kΩ 3MΩ 30MΩ 0.1 ohms +(1.5% reading + 5 digits) +(2.0% reading + 8 digits) +(3.0% reading + 10 digits) Overload Protection: 250VAC rms Open ckt. V: 0.6V - 1.2V Continuity Buzzer sounds for resistance less than 20 ohms (approximately) Logic <1V Logic low, 1V to 2V Indeterminate, >2V Logic High, 3V reference, 220KΩ input impedance Operating Temp. 32 o F to 122 o F (0 o C to 50 o C) Storage Temp. -4 o F to 140 o F (-20 o C to 60 o C) Relative Humidity <70% operating, <80% storage Operating Altitude 2000 meters (7000ft.) maximum Safety For indoor use and in accordance with Overvoltage Category II, Pollution Degree 2. Category II includes local level, appliance, portable equipment, etc., with transient overvoltages less than Overvoltage Category III. Power supply Two 1.5V AAA batteries Dimensions/Wt. 1x7.5x1.9 (26x191x40mm) / 3.9oz (120gm)
DC, DCV Ω DCA Logic AC, ACV Ω ACA Logic FUNCTIONAL DESCRIPTION 8 9 1 2 4 3 5 6 10 7 1. Data Hold Button 8. Positive Test Probe 2. Range Hold Button 9. Battery & Fuse Door 3. DC/AC / Button 10. LCD Display & Bargraph 4. Function Switch 5. Green LED 6. Red LED 7 Common Terminal Function Switch Settings Switch Button V Ω A Logic Product Description The Model 3526-B Digi-Probe Multimeter with Logic is a handheld, battery operated meter that is designed and tested according to international safety standards. It provides all the basic measurements: AC and DC voltage, AC and DC Current, and Resistance. A diode and continuity test is also included for quick checks of switched, wiring, and semiconductors. A logic test function further extends the measurement capability of the DMM. Autoranging For user convenience, ranges are automatically set to the appropriate range. Most users will find this the easiest way to take a measurement. Manual range selection can also be made via the RANGE HOLD button. A short press will hold the present range. "R-H" will be displayed on the LCD. Subsequent short presses will advance the range. To return to autoranging mode, press and hold the RANGE button for 2 seconds. Continuity Beeper
The Continuity mode provides a means to determine if a low resistance (continuity) exists between two points without having to constantly watch the display. It provides an audible beep when continuity is detected. There will be no sound until a low resistance is measured. Bargraph To watch for rapid fluctuations in the reading, a 32 segment bargraph is provided. This bargraph responds much faster than the digital display, allowing the user to better judge the stability or instability in the digital reading. For example, it will always read to the right for inputs of +1.0 volt and -1.0 volt. Data Hold It is often not possible to view the display and touch the probes to the circuit being tested. In these situations, this meter provides a data hold feature which function is to take and hold the reading. The Data Hold feature is available in all functions. To use this feature, simply press and release the DATA HOLD button. D-H will be displayed on the LCD. Press the DATA HOLD button again to cancel. Low Battery Indicator Internal circuitry continuously monitors the battery voltage and will inform the user by activating the BAT annunciator on the display. Replace the batteries immediately to ensure accurate readings. Sleep Mode If left on for 10 minutes, the meter will power down to save batteries. To turn the power back on, simply press any button or move the Function switch. Self Storing Tip The Test Tip is self storing for safety and convenience. Turn the red collar in a counter clockwise fashion to loosen the tip, remove it, turn it over, and re-insert it into the red collar. Turn the collar clockwise to tighten. Before You Use This Meter Before using the Model 3526-B, familiarize yourself with the instrument and this manual. READ AND REVIEW THIS MANUAL FREQUENTLY. Each time the meter is used, inspect it for mechanical defect. Also, inspect the test lead. Only after all tests have passed should the meter be used. DO NOT USE THE METER IF ANY OF THESE TESTS FAIL. Battery and Fuse Replacement 1. Disconnect any test leads connected to the meter and place the Function Switch in the OFF position. Remove the Battery Cover by removing the screw. 2. Remove the two AAA batteries and replace with fresh ones.
3. The fuse may be replace at this time by removing it from its holder. Replace only with a fuse of the same type and rating specified. 4. Place the Battery Cover back into place and reinstall the screw. High Voltage Measurements CAUTION: Always observe the following rules and procedures when making measurements in high voltage circuits. Voltages greater than 40 VDC or 25 VAC may create a serious shock hazard. Never use this meter on circuits with voltages higher than 500 VAC RMS or VDC. Treat any unknown voltages as though they were high voltages. DO NOT USE THIS METER ON 480VAC POWER OR OTHER CIRCUITS THAT ARE CATEGORY III PER UL-3111-1. For maximum safety, turn the equipment or voltage source off before connecting the test leads. Make certain that no capacitors in the circuit being tested remain charged to a high voltage. Set the meter to Autorange. NEER CHANGE THE POSITION OF THE FUNCTION SWITCH WITH POWER APPLIED TO THE CIRCUIT. Touch the test probe tips to the circuit being measured and take the required reading. Using the Model 3526-B Measuring AC and DC Voltage 2. Set the Function Switch to the V position 3. Select either DC or AC measurements by pressing the DC/AC button. When AC is selected, the AC annunciator will be visible on the display. 4. Connect the meter across the circuit to be measured. 5. Read the voltage on the display. For DC voltage measurements, the Negative Sign annunciator indicates that the Tip is negative with respect to the COM Jack. Measuring AC and DC Current 2. Set the Function Switch to the ma position 3. Select either DC or AC measurements by pressing the DC/AC button. When AC is selected, the AC annunciator will be visible on the display. 4. With power to the circuit off, connect the test leads in series with the circuit to be measured. 5. Apply power to the circuit and read the current on the display. For DC current measurements, the Negative Sign annunciator indicates that the Tip is negative with respect to the COM Jack.
6. Turn power to the circuit off. Disconnect the test leads from the circuit under test. Measuring Resistance 2. Set the Function Switch to the Ω position. 3. With the leads open, the display should display the Over- Range indication. Short the leads together. The display should indicate <0.3 ohms. 4. Connect the leads to the circuit or component under test. 5. Read the resistance on the display. For resistances above approximately 1MΩ, it is normal for the reading to take several seconds to settle. There may also be additional digit bounce due to noise pickup. Diode Test 2. Set the Function Switch to the Diode/Continuity ( ) position. Press the DC/AC button so that the symbol appears in the display. 3. Connect the test leads across the diode under test. The Tip attaches to the anode and the black lead attaches to the cathode. 4. Read the forward voltage drop on the display. The displayed value is in volts. If the Over-Range indication is displayed, then the diode is either open, or the leads are connected backwards. Continuity Test 2. Set the Function Switch to the Diode/Continuity ( ) position. Press the DC/AC button so that the symbol appears in the display. 3. Connect the test leads across the circuit under test. If the resistance is less than approximately 20Ω the beeper will sound. NOTE: The polarity of the positive test probe is "+" Logic Test 2. Set the Function Switch to the LOGIC position 3. Connect the black test lead to the common terminal of the circuit to be tested. Connect the test probe to the point to be tested. a) If the measured voltage is below the low reference threshold the GREEN LED will light, indicating a logic 0. b) If the measured voltage is above the high reference threshold the RED LED will light, indicating a logic 1.
c) If the measured voltage is between the reference limits, neither LED will light, invalid state. 4. The LCD will display the measured voltage. Accessories, Parts & Service Model 3526-B 3526 Black Test Lead 79-771 Replacement Tip 79-772 Fuse 800mA/250V fast blow 3207-122 Users Manual 84-797 Carrying Case 10-4249 Calibration A one year calibration interval is recommended. Refer to qualified service personnel. DO NOT ATTEMPT TO SERVICE THIS UNIT. TAKE IT TO A QUALIFIED TRIPLETT SERVICE CENTER. ANY ATTEMPT TO SERVICE BY AN UNQUALIFIED PERSON MAY BE DANGEROUS AND/OR LETHAL AND WILL VOID YOUR WARRANTY 1) Call 1-800-TRIPLETT to obtain a Return Material Authorization (RMA) number from Customer Service. 2) Enclose a copy of the original sales receipt showing date of purchase. 3) Clearly print the RMA number on the outside of the shipping container. 4) Return to: Triplett Corporation One Triplett Drive Bluffton, OH 45817 ATTN: Repair Dept. Be sure to include a full description of the problem, and a telephone number, street address, or email address, where you can be contacted, and a return address where the meter can be shipped to upon repair. TRIPLETT PRODUCT RETURN INSTRUCTIONS In the unlikely event that you must return your Triplett equipment for repair, the following steps must be taken. Triplett One Year Limited Warranty
The Triplett Corporation warrants instruments and test equipment manufactured by it to be free from defective material or workmanship and agrees to repair or replace such products which, under normal use and service, disclose the defect to be the fault of our manufacturing, with no charge within three years (one year on calibration) of the date of original purchase for parts and labor. If we are unable to repair or replace the product, we will make a refund of the purchase price. Consult the Instruction Manual for instructions regarding the proper use and servicing of instruments and test equipment. Our obligation under this warranty is limited to repairing, replacing, or making refund on any instrument or test equipment which proves to be defective within three years from the date of original purchase. This warranty does not apply to any of our products which have been repaired or altered by unauthorized persons in any way so as, in our sole judgment, to injure their stability or reliability, or which have been subject to misuse, abuse, misapplication, negligence, accident or which have had the serial numbers altered, defaced, or removed. Accessories, including batteries and fuses, not of our manufacture used with this product are not covered by this warranty. To register a claim under the provisions of this warranty, contact Triplett Corporation's Customer Service Department for a Return Authorization Number (RMA) and return instructions. No returned product will be accepted without an RMA number. Upon our inspection of the product, we will advise you as to the disposition of your claim. ALL WARRANTIES IMPLIED BY LAW ARE HEREBY LIMITED TO A PERIOD OF THREE YEARS (ONE YEAR ON CALIBRATION) FROM DATE OF PURCHASE, AND THE PROVISIONS OF THE WARRANTY ARE EXPRESSLY IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED. The purchaser agrees to assume all liability for any damages and bodily injury which may result from the use or misuse of the product by the purchaser, his employees, or others, and the remedies provided for in this warranty are expressly in lieu of any other liability Triplett Corporation may have, including incidental or consequential damages. Some states (USA ONLY) do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. No representative of Triplett Corporation or any other person is authorized to extend the liability of Triplett Corporation in connection with the sale of its products beyond the terms hereof. Triplett Corporation reserves the right to discontinue models at any time, or change specifications, price or design, without notice and without incurring any obligation. This warranty gives you specific legal rights, and you may have other rights which vary from state to state. Triplett Corporation One Triplett Drive, Bluffton, OH 45817 PH: 419-358-5015 FAX: 419-358-7956 1-800-874-7538 www.triplett.com