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TP Transmitter Test Fixture
User Manual
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Detcon TP Transmitter Test Fixture User Manual

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Detcon Model TP Transmitter Test Fixture
Operators Instruction Manual
October 15, 2007 * Document 3390 * Revision 1.0
DETCON, Inc.
3200 Research Forest Dr., Building A-1
The Woodlands, Texas 77387
Ph. 713-559-9200 / Fax 281-298-2868
www.detcon.com
Table of Contents
1.0 Description
2.0 Features
3.0 Specifications
4.0 Operation
5.0 Test Fixture Calibration
6.0 Warranty
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1.0 Description
The Detcon Model TP Transmitter Test Fixture is designed to test the operation of Detcon Model TP Series H2S Transmitters. Models covered are series TP-424x, TP­524x, TP-550x, and TP-624x.
2.0 Features
Reference figure 1 below for feature locations.
1 - Internal power supply and power switch 2 - Plug-in connector for TP-424 and TP-524 transmitters 3 - MOS sensor open heater switch (SW2) 4 - Heater voltage digital LED meter 5 - Plug-in connector for TP-550 and TP-624 transmitters 6 - mA output digital LED meter 7 - RS-485 output (TP-550 and TP-624) 8 - Fault and alarm relay output LEDs (TP-550 and TP-624) 9 - PPM H2S range selector switch and open film switch
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3.0 Specifications
Compatible withthe Following Models Model Series TP-424x, TP-524x, TP-550x, TP624x Input Power 100-240VAC, 50 / 60Hz Power Consumption < 17 Watts Digital Current Meter Accuracy: ± 0.3% FS Digital Voltage Meter Accuracy: ± 0.1% FS Warranty Two year Outputs Serial RS-485 Modbus™
4.0 Operation
Before using the test fixture, the technician should first be familiar with the operation of Detcon TP series hydrogen sulfide gas sensors. Review the applicable sensor instruction manual(s) for detailed operating instructions.
The test fixture is designed to verify performance of the Detcon TP series transmitters only. The test fixture circuitry mimics the sensor portion of the complete sensor assembly.
NOTE 1: The test fixture is designed to be used with only one transmitter at a time. Plugging more than one transmitter in the test fixture at the same time (P1 and P2) will cause erroneous readings.
NOTE 2: Reference Figure 1 for location of test fixture components. Before starting verify that SW1 is in the “0” position and that SW2 is in the “NORMAL” position.
4.1 TP-424x Transmitters
Require tools:
Digital Volt-Ohm Meter (DVM) Jewelers screwdriver
1 - Turn the power switch on. Both digital LED meters should illuminate.
2 - Plug the TP-424x transmitter into P1.
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3 - Check the heater voltage. Insert DVM probes into the VOLT “+” and “–“ test points. Adjust the TEMP potentiometer on the transmitter until you achieve a reading of 5.25V. Verify that the bridge voltage LED meter on the test fixture tracks closely with a reading of 5.25V (±0.1V). Verify adjustability to either side of 5.25V.
4 - Check zero signal output. Verify SW1 is in the “0” position. Insert DVM probes into the signal “+” and “–“ test points. Verify a reading of 40mV. Verify a mA output LED meter reading of 4.0mA (±0.1mA).
5 - Perform span cal. Turn SW1 to the “25” position. With the DVM probes in the signal “+” and “–“ test points, adjust the SPAN-COARSE potentiometer on the transmitter until you achieve a reading of 80mV. Verify that the mA output LED meter tracks closely with a reading of 8.0mA. Verify adjustability to either side of 80mV. Do the same with the FINE potentiometer to check adjustability.
6 - Check different ranges. Turn SW1 to the 10 position and verify a signal of 56mV/5.6mA (±10%). Turn SW1 to the 50 position and verify a signal of 120mV/
12.0mA (±10%). Turn SW1 to the 100 position and verify a signal of 200mV/20.0mA (±10%).
7 - Check heater fault (open heater). Toggle SW2 to the OPEN position and note the “HET FLT” LED on the transmitter illuminates and the DVM signal reading drops several mV. Also note that the heater voltage LED display indicates a reading of 0.00 and the mA output LED reading tracks with the mV reading. Return SW2 to the NORMAL position.
8 - Check signal fault (open film). Turn SW1 to the OPEN FILM position and note that the “SIG FLT” LED on the transmitter illuminates. The DVM signal reading will also drop several mV. Note that the mA output LED reading tracks with the mV output reading. Return SW1 to the “0” position.
4.2 TP-524x Transmitters
Require tools:
Detcon PN 327-000000-000 MicroSafe™ Programming Magnet
NOTE: These instructions cover testing of the main features of the TP-524x transmitter. See the applicable TP-524x instruction manual for a complete list of program features and detailed operating procedures.
1 - Turn the power switch on. Both digital LED meters should illuminate.
2 - Plug the TP-524x transmitter into P1.
3 - Set the heater voltage.
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a) At the transmitter,enter the programming menu by holding the programming magnet stationary over “PGM 2” for 30 seconds until the display reads “VIEW PROG STATUS”, then withdraw the magnet.
b) Next, scroll to the “Heater @ #.##vdc” listing and then hold the programming magnet over “PGM 1” for 3 seconds. The menu item appears as “Adjust @ #.##vdc”.
c) Use the programming magnet to make an adjustment to “PGM 1” to increase or “PGM 2” to decrease the heater voltage. Set the voltage to 5.25 VDC. Note that the LED meter on the test fixture tracks the reading (±0.1V).
d) Exit to the programming menu by holding the programming magnet over “PGM1” for 3 seconds, or automatically return to the programming menu in 30 seconds.
e) Exit back to normal operation by holding the programming magnet over “PGM 2” for 3 seconds, or automatically return to normal operation in 30 seconds.
4 - Perform a span cal.
a) Enter the calibration menu by holding the programming magnet stationary over “PGM 1” for 3 seconds until the display reads “1-ZERO 2-EXIT”, then withdraw the magnet.
b) From the calibration menu “1-ZERO 2-EXIT” proceed into the span adjust function by holding the programming magnet stationary over “PGM 1” for 3 seconds until the display reads “APPLY 25 PPM H2S” then withdraw the programming magnet. Note that the CAL LED is illuminated and that the mA Output LED meter on the test fixture indicates 2.0 mA.
c) Turn SW1 to the “25” position. The display will change to “AUTOSPAN 25 PPM”. When the sensor signal is stable it will auto span to the requested concentration and the display will change to “SPAN COMPLETE” for two seconds and then “REMOVE GAS”. Turn SW1 back to the “0” position. The display will return to the normal operation menu, “0 PPM H2S”.
5 - Check different ranges. Turn SW1 to each position (0, 10, 25, 50, 100) and verify a matching transmitter display reading (±10%). The 100 position will cause an over-range condition resulting in the display flashing “100PPM H2S”. Also verify an LED mA output reading of 4.0 mA (0), 5.6mA (10), 8.0mA (25), 12.0mA (50), and 20.0mA (100). Return SW1 to the “0” position.
6 - Check heater fault (open heater). Toggle SW2 to the OPEN position and note the “FLT” LED on the transmitter illuminates and the display reads “Heater Fault”. Also note that the heater voltage LED display and the mA output LED display indicate a reading of
000. Return SW2 to the NORMAL position.
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NOTE: The OPEN FILM function of SW1 is not compatible with the TP-524x transmitter.
4.3 TP-550x and TP-624x Transmitters
Require tools:
Detcon PN 327-000000-000 MicroSafe™ Programming Magnet
NOTE: These instructions cover testing of the main features of the TP-550x and TP-624x transmitters. See the applicable TP-550x and TP-624x instruction manual for a complete list of program features and detailed operating procedures.
1 - Turn the power switch on. Both digital LED meters should illuminate.
2 - Plug the TP-550x/TP-624x transmitter into P2.
3 - Set the heater voltage.
a) At the transmitter,enter the programming menu by holding the programming magnet stationary over “PGM 2” for 30 seconds until the display reads “VIEW PROG STATUS”, then withdraw the magnet.
b) Next, scroll to the “Heater @ #.##vdc” listing and then hold the programming magnet over “PGM 1” for 3 seconds. The menu item appears as “Adjust @ #.##vdc”.
c) Use the programming magnet to make an adjustment to “PGM 1” to increase or “PGM 2” to decrease the heater voltage. Set the voltage to 5.25 VDC. Note that the LED meter on the test fixture tracks the reading (±0.1V).
d) Exit to the programming menu by holding the programming magnet over “PGM1” for 3 seconds, or automatically return to the programming menu in 30 seconds.
e) Exit back to normal operation by holding the programming magnet over “PGM 2” for 3 seconds, or automatically return to normal operation in 30 seconds.
4 - Perform a span cal.
a) Enter the calibration menu by holding the programming magnet stationary over “PGM 1” for 3 seconds until the display reads “1-ZERO 2-EXIT”, then withdraw the magnet.
b) From the calibration menu “1-ZERO 2-EXIT” proceed into the span adjust function by holding the programming magnet stationary over “PGM 1” for 3 seconds until the display reads “APPLY 25 PPM H2S” then withdraw the
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programming magnet. Note that the CAL LED is illuminated and that the mA Output LED meter on the test fixture indicates 2.0 mA.
c) Turn SW1 to the “25” position. The display will change to “AUTOSPAN 25 PPM”. When the sensor signal is stable it will auto span to the requested concentration and the display will change to “SPAN COMPLETE” for two seconds and then “REMOVE GAS”. Turn SW1 back to the “0” position. The display will return to the normal operation menu, “0 PPM H2S”.
5 - Check different ranges. Turn SW1 to each position (0, 10, 25, 50, 100) and verify a matching transmitter display reading (±10%). The 100 position will cause an over-range condition resulting in the display flashing “100PPM H2S”. Also verify an LED mA output reading of 4.0mA (0), 5.6mA (10), 8.0mA (25), 12.0mA (50), and 20.0mA (100). Return SW1 to the “0” position.
6 - Check heater fault (open heater). Toggle SW2 to the OPEN position and note the “FLT” LED on the transmitter and test fixture illuminate and the display reads “Heater Fault”. Also note that the heater voltage LED display and the mA output LED display indicate a reading of 000. Return SW2to the NORMAL position.
7 - Check signal fault - open film (TP-550 only). Turn SW1 to the OPEN FILM position and note that the “FLT” LED on the transmitter and test fixture illuminate. Return SW1 to the “0” position.
NOTE: The OPEN FILM function of SW1 is not compatible with the TP-624x transmitter.
8 - Check alarm relay outputs. Turn SW1 clockwise until both alarm LEDs on the transmitter illuminate. Verify that both alarm LEDs on the test fixture also illuminate. Return SW1 to the “0” position. If alarms on the transmitter are programmed for latching, swipe the programming magnet over PGM1 or PGM2 to reset.
9 - RS-485 Out (P3). The TP-550x and TP-624x operate as Modbus slave devices. RS­485 operation is checked by connecting to an RS-485 Modbus Master device. Reference the applicable instruction manual for further information.
5.0 Test Fixture Calibration
The TP Transmitter Test Fixture is calibrated at the Detcon factory. SW1 range adjustment potentiometers are factory set and should not be adjusted by the user. If calibration is required, return the test fixture to Detcon for calibration.
6.0 Warranty
Detcon, Inc., as manufacturer, warrants each TP Transmitter Test Fixture for a two year period under the conditions described as follows: The warranty period begins on the date
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of shipment to the original purchaser and ends two years thereafter. Should the test fixture fail to perform in accordance with published specifications within the warranty period, return it to Detcon, Inc., 3200 A-1 Research Forest Dr., The Woodlands, Texas 77381, for necessary repairs or replacement.
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