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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
10.3.4.1 PSM Diagnostic Procedures
The Linear Power Supply board can be tested by checking the DCPS - TEST function on the
front panel. It should read 2500 mV ± 200 mV. If the value is outside this range, individual
output voltages can be tested on connector P3, see Schematic in the Appendix for pinouts.
The Switching Power Supply output can be tested by observing the temperature of the PMT cold
block using the PMT TEMP - TEST function. The temperature should be constant ± 1°C. The
output voltage can be observed on J10 of the Switch Board. It should be 15VDC ± 0.5.
The Switch Board can be tested by observing the diagnostic LEDS along the top edge of the
board. The following Table 10-8 describes the typical operation of each LED.
Table 10-8: Power Supply Module LED Operation
No. Function Description
1. High Span Valve Should switch ON when CALS-HIGH-ENTR button sequence
pressed. High span gas input to analyzer.
2. Zero Valve Should switch ON when CALZ button pressed. Zero gas input to
analyzer.
3. Sample/Cal Valve Should switch ON when CALS or CALZ buttons are pressed.
ON when in calibrate mode.
4. Low Span Valve Should switch ON when CALS-LOW-ENTR button sequence
pressed. High span gas input to analyzer.
5. UV LAMP Turns on the UV lamp power.
6. Spare
7. Spare
8. Reaction Cell Heater Should cycle ON-OFF every to control constant temp.
10-44