Teledyne 100AH PSM Diagnostic Procedures, Power Supply Module LED Operation, 10-44

Teledyne API Model 100AH SO2 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 10-8describes 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.

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