Model 332 Differential Pressure Transmitter

Transcription

1 Model Differential Pressure Transmitter USERS GUIDE Please read carefully before using. Manufactured by: FURNESS CONTROLS LIMITED Beeching Road, Bexhill, East Sussex, TN9 LJ, England. Telephone (044) 706 Fax: (044) Web Site:

2 TABLE OF CONTENTS TABLE OF CONTENTS... REVISION RECORD... SAFETY NOTES AND RECOMMENDATIONS...4 INTRODUCTION...5 GENERAL DESCRIPTION...5 ENCLOSURE...5 INSTALLATION...6 MOUNTING...6 PNEUMATIC...6 ELECTRICAL...7 COMMISSIONING... CALIBRATION... SPECIFICATION... DIMENSION DRAWINGS...4 BASIC INSTRUMENT...4 PIPE MOUNTING KIT...4 FLUSH MOUNTING KIT...5 PANEL MOUNTING KIT...5 Model Users Guide Issue 8 Page

3 REVISION RECORD Issue Date Summary of changes 5/0/00 Addition of 0.4 to V -wire range 8/0/0 Relay wiring connections added /0/0 Typical wiring configurations and relay ratings added and model range amended a 08/0/0 Clarification added regarding relay states and keypad use. b 8//0 Relay and delay options added to manual. 4 8/04/0 Moved menu description to 00 Series Supplement 5 /0/06 Added info on 0.5 V output options and Auto Zero hardware option. Changed calibration service from NAMAS to UKAS. 6 9/07/06 Added wiring drawings for all o/p options & auto/remote zero 7 7/05/09 Remote Zero switch timing 8 4/0/0 Dimension drawings added. Specification updated. Calibration interval added. Page Model Users Guide Issue 8

4 SAFETY NOTES AND RECOMMENDATIONS PLEASE READ CAREFULLY. Read these instructions and this users guide carefully.. All electrical supplies to the equipment must be externally fused with an appropriately rated fuse for safety.. Always unplug the equipment from the supply before carrying out any servicing. 4. The air supply must be turned off before carrying out any work on the pneumatic system. The air supply must not exceed that specified on the instrument or in the Test Certificate. 5. If in doubt about any aspect of safety with the equipment then contact Furness Controls BEFORE proceeding. Model Users Guide Issue 8 Page 4

5 INTRODUCTION This guide should be read in conjunction with the 00 Series Supplement General Description The FCO is a fully configurable, industrial differential pressure transmitter. The pressure cell is based on the unique Furness Controls capacitive sensor of proven reliability. A microprocessor is used to control all functions of stability, such as temperature correction and linearity. The output can be scaled as a linear or square root function to facilitate the use of Pitot Static Tubes or other primary flow elements. The FCO is suitable for industrial applications of control, measurement and monitoring. Features include: Optional large character liquid crystal 4½ digit display Linear or square root output 0: range adjustment using Model 0 interface Optional Configurations: -Wire 4 to 0mA Current output -Wire Voltage output 0 to 0.5V, 0 to V, 0 to V, 0 to 5V, 0 to 0V, 0. to 0.5V, 0. to V, 0.4 to V, to 5V, to 0V 4-Wire Voltage output 0 to 0.5V, 0 to V, 0 to V, 0 to 5V, 0 to 0V, ±0.5V, ±V, ±V, ±5V, ±0V 4-Wire Isolated 4 to 0mA Current output 4-Wire Isolated Voltage output 0 to V, 0 to V, 0 to 5V, 0 to 0V, ±0.5V, ±V, ±V, ±5V, ±0V Remote Zeroing Function Zero the FCO with an externally fitted button, or suitable electronic circuitry. Available to instruments with the necessary hardware option fitted. Auto Zeroing Function Adjustable delay between 0 and 4.0 Hours with 0. hour resolution. Available to instruments with the necessary hardware option fitted. Typical applications include: Combustion pressure measurement and control of industrial furnaces Air pressure measurement and control of dryers, kilns and ovens Air flow measurement in conjunction with pitot static tubes, orifice plates or venturi Enclosure The instrument is housed in an IP54 rated ABS enclosure. Pneumatic connections (fitted as standard) are for 4mm i/d push on tubing. Optional pneumatic connections are: /8 BSPP(f) threaded adaptor, and /4"BSPP(f) threaded adaptor Page 5 Model Users Guide Issue 8

6 INSTALLATION Mounting The recommended mounting position of the FCO is with the pressure entry ports facing directly downwards. This helps prevent the ingress of dust and liquid. Due to the sensitivity of lower range instruments, they should not be mounted in areas where they will be subjected to high vibration as this could cause spurious readings. The enclosure has four mounting holes for M4 screws, which are accessible with the cover removed. Pneumatic All pipework should slope downwards from the instrument to make it self draining. When using the instrument to measure pressure at a single point with long pipe runs the reference port should be piped in parallel, with the pipe left open at the process end. Model Users Guide Issue 8 Page 6

7 Electrical Connectors Cable entry is via a right-angled Type C DIN connector with M6 cable gland mounted on the bottom of the instrument. Where optional features are added to the standard FCO (i.e. relay o/p, auto zero, or remote zero) the same right-angled Type C DIN connector is used to provide power and/or to gain access to the various functions provided by that option. A two to four core cable, up to 6.0mmO.D., can be used with the standard socket. The terminals provided with the socket are of the screw type. The socket must first be dismantled, by removing the securing screw and pushing the centre terminal block from the housing. The cable is passed though the gland and housing. Conductors are terminated as detailed below. Each conductor should be stripped free of insulation for a length of -5mm. Securing Screw Aux Relay Relay Remote Zero Circuitry Auto Zero Circuitry Relay Circuitry Housing Transmitter Circuitry Terminal Block FCO System Diagram Page 7 Model Users Guide Issue 8

8 Transmitter Connection Refer to the instruments rating label for power supply requirements and configuration. 4 to 0mA Isolated 4 to Isolated Voltage Output PIN Output 0mA O/P Voltage Output -Wire -Wire 4-Wire 4-Wire 4-Wire -ve n.c. -ve -out -Vout +ve +ve +ve +4Vdc +4Vdc n.c. O/P O/P +out +Vout n.c. 0Vdc 0Vdc 0Vdc 0Vdc Note: the user cannot reassign pin assignments. The diagrams below show typical wiring configurations: wire - 4 to 0mA Output wire - Voltage Output 4 wire - Voltage Output No Connection Vout Vout +Ve -Ve +Ve No Connection Voltage Indicator +Ve -Ve Voltage Indicator ma Indicator No Connection 0V 0V +V 0V Supply 9Vdc to 6Vdc +/-0% +V 0V Supply 4Vdc to 6Vdc +/-0% ma No Load +V 0V -V Supply +/-4Vdc to +/-8Vdc +/-0% ma No Load 4 wire - Isolated 4 to 0mA Output 4 wire - Isolated Voltage Output +maout(iso) ma Indicator +Vout(iso) Voltage Indicator 4V Isolation Barrier -maout(iso) 4V Isolation Barrier -Vout(iso) 0V 0V 4V 0V Supply 4Vdc +/-0% 4mA No Load 4V 0V Supply 4Vdc +/-0% 4mA No Load Model Users Guide Issue 8 Page 8

9 Auxiliary Connection The connector fitted to the top left of the case has terminals for powering the internal circuitry for the relay outputs & auto zero functions, and must be connected to an external 4Vdc power source. The same connector is also used to connect to an external (remote) switch or suitable electronic circuitry for zeroing the transmitter. PIN Remote Auto Relay Zero Zero Outputs RZ(0V) RZ(0V) RZ(0V) RZ(+V) RZ(+V) RZ(+V) 4Vdc 4Vdc 0Vdc 0Vdc Supply Specification Remote Zero power supply 5Vdc to 4Vdc +/-0%, 5mA (min) Switch contact time 0.sec (min) to.0sec (max) Auto Zero power supply 4Vdc +/-0%, 0mA (min) Relay power supply 4Vdc +/-0%, 50mA (min) Note: When the Zero is triggered, the display and output are frozen for.5 seconds while the pneumatic ports are isolated from the process ports. The diagram below shows a typical wiring configuration: NOTE: Remote Zero is an optional feature 4Vdc 4Vdc Supply Remote Zero RZ(+V) RZ(0V) 0V 0V Page 9 Model Users Guide Issue 8

10 Relay Connections (Option) The FCO can optionally incorporate a pair of relays for triggering auxiliary equipment such as alarms. Two connectors for the relays are located on the top right of the case. The middle connector is for the relay contacts. The right-hand connector is for the relay contacts. The relays do not feature any contact suppression. Relay Relay Relay Connectors PIN Relay NO NO NC NC Relay unused unused COM COM Relay states are shown for the instrument switched off. Relay contact ratings 55Vac/0Vdc (non inductive load) NOTE: refer to the 00 Series Supplement for setting the relay trigger levels. The diagram below shows a typical wiring configuration: No Connection No Connection nc no nc no com Relay com Relay Model Users Guide Issue 8 Page 0

11 COMMISSIONING Make the electrical and pneumatic connections as recommended. Turn on the power supply. Configuration settings (such as range, display settings, etc.) may be changed using the FCO0 utility cable, refer to the 00 series supplement for further details. Check that either the auxiliary current sensing or voltage-measuring device that is being used is registering. If not, check the supply voltage is within specified limits and inspect for poor connections. After fixing the instrument in position, allow at least one hour before commencing the final commissioning. After commissioning, allow the instrument to reach ambient temperature for at least 0 minutes. With no pressure applied, check the output is correct for zero input. If not:- press the zero button (indicated below) activate the remote zero (if fitted) or enable the auto zero function (if fitted), the delay time may have to be temporarily set to 0.hour (refer to the 00 series supplement for further details). Zero Button NOTE: if the auto zero valve is fitted, pressing either the zero button or the remote zero will force an auto zero cycle. In the unlikely event an error message is displayed, refer to the 00 series supplement for further details. The instrument is now ready for operation. Page Model Users Guide Issue 8

12 CALIBRATION Furness Controls recommend that all pressure transmitters and flow devices are recalibrated annually. For critical applications, it is advisable to check the calibration more frequently. All calibration of the FCO is performed through a PC using the FCO0 interface unit and software. Refer to the 00 Series Supplement for further information regarding the recalibration of the FCO. Contact our Furness Controls UKAS accredited calibration laboratories for further information. Model Users Guide Issue 8 Page

13 SPECIFICATION Features Models/Ranges Output Options Display (Optional) Adjustable Damping Square Root function Trip Level Relays Zero Control Pneumatic Ports Model: ±50Pa Model: ±50Pa Model: ±500Pa Model4: ±500Pa Model5: ±0kPa Model6: ±0kPa High pressure ranges available on request wire 4 0mA wire voltage: 0 VDC to 0 0VDC full scale 4 wire voltage: 0 VDC to 0 0VDC full scale 4 wire voltage: ± VDC to ±0 VDC full scale 4 wire isolated: any of the ma or voltages above Most common differential pressure, volumetric flow, mass flow, and velocity units 0.0 to 60.0 seconds Optional Optional: relays, rated 55Vac, 0Vdc Optional: Automatic or Remote Barbs with locknuts for 6mm OD x 4mm ID for flexible tubing ⅛ BSPF ¼ BSPF Performance Enhanced 0 C Standard 0 C Span Adjustment Long Term Drift Temperature Coefficients 0% to 00% range: < ± (0.5% reading + digit) Note: Unipolar span only, standard 0 to 0% range: < ± (0.05% range + digit) accuracy applies to bipolar span. 0% to 00% range: < ± (0.5% reading + digit) 0 to 0% range: < ± (0.05% range + digit) 0% to 00% of range Note: Span can be set anywhere within instruments range. For span < 0% of range, accuracy is reduced to the standard specification Typically 0.% per annum Standard Zero: < 0.%/ C Range: < 0.4%/ C Working Temperature 0 to 60 C Minimum Step Response 00ms Output Update 50ms Output Resolution Better than 0.0 % Span Overload 0 x DP range Static Pressure ± bar Gauge Enhanced Zero: < 0.0%/ C Range: < 0.0%/ C Construction Enclosure Dimensions Materials in Contact With Media Media Compatibility Weight IP54 rated ABS Choice of mounting options 0 x 80 x 58mm Copper, brass, nickel, mica & PVC Air and non corrosive gases max 95% humidity non condensing 0.5kg Page Model Users Guide Issue 8

14 Basic Instrument DIMENSION DRAWINGS Pipe Mounting Kit Model Users Guide Issue 8 Page 4

15 Flush Mounting Kit Panel Mounting Kit Page 5 Model Users Guide Issue 8