Tp 43: Fpd Gain Setting - ABB PGC2000 Operation And Service Manual

9. Loosen the four screws that retain the front cover of the heater box.
10. Request an analysis for the stream in question. At stream step the stream will begin to purge as
indicated on the background screen. Connect voltmeter leads across the stream switch soleniod
valve (process) or the calibration solenoid valve (calibration). The voltage to the solenoid valve
should measure 110 VDC when the valve is on and zero volts when the valve is off. If the voltage
is being applied, yet the valve is not switching, replace the solenoid valve.
11. If no voltage is present, remove power and disconnect both solenoid valve leads.
12. Connect an ohmmeter between the two solenoid valve coil leads. If open, (extremely high
resistance), replace the solenoid valve or coil.
13. Reconnect solenoid valve coil leads.
14. Apply power to analyzer and switch D.C. solenoid driver using procedure in step 8.
15. If voltage does not switch, replace D.C solenoid valve driver PCB.
16. If voltage does not switch, replace Chroma I/O board.
17. Reconnect and tighten all loose or disconnected fittings, and check for and repair any leaks.
18. Close and secure all doors and all covers.
19. Apply purge air and power.
20. Allow temperature to equilibrate.
21. Perform an analysis and verify analyzer operation.

TP 43: FPD GAIN SETTING

This test procedure is not normally required, unless the photomultiplier tube is
changed.
1. Stop Analysis at the end of the current analysis and make no injection until this procedure is
completed.
2. On the Background screen press the F2 (Manual Control) soft key.
3. On the Manual Control Mode screen press the F2 (Detector and Graphics) soft key.
4. On the Chroma Board screen press the F3 (Manually Zero Baseline) soft key. The Detector
Reading should change to a value of 2.00 mV ±0.05 mV.
5. On the Chroma Board screen note the Hardware Zero, Software Zero, and Detector Reading
values. The hardware zero should be 20 to 80 mV typical. On a clean system it should be 15 to
50 mV.
6. If the hardware zero reading is less than 15 mV, adjust potentiometer R71 on the FPD
Electrometer PCB clockwise slightly.
7. Repeat steps 4, 5 and 6 until the hardware zero reading in step 5 is 20 mV.
2000-OSM, F1
NOTE
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