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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
Table 10-4: Diagnostic Mode - Signal I/O (Continued)
No. Signal Control Description
19. ST_TEMP_ALARM YES Status Bit - Temperature alarm
Logic High = Reaction cell, PMT, Box temps out of
spec
Logic Low = Temps within spec
20. ST_DIAG_MODE YES Status Bit - In Diagnostic mode
Logic High = M100AH in Diagnostic mode
Logic Low = Not in Diag mode
21. ST_POWER_OK YES Status Bit - Power OK
Logic High = Instrument power is on
Logic Low = Instrument power is off
22. ST_SYSTEM_OK YES Status Bit - System OK
Logic High = No instrument warning present
Logic Low = 1 or more alarm present
23. ST_HVPS_ALARM YES Status Bit - HVPS alarm
Logic High = HVPS out of spec
Logic Low = HVPS within spec
24. PMT_SIGNAL NO Current PMT voltage. Same as PMT voltage in
TEST menu. Bi-polar, typically in 0-5000 mV
range. A constant value of 5000 mV indicates off
scale.
25. RCELL_TEMP NO
Reaction Cell temperature. 3500 mV for 50
°
C.
26. BOX_TEMP NO
Box Temperature. Typically 1800 mV for 25
°
C.
27. PMT_TEMP NO PMT cold block temperature. Typically 1800 mV
for 7
°
C.
28. DCPS_VOLTAG NO DC power supply composite voltage output.
Typically 2500 mV.
29. SAMPLE_PRES NO Sample inlet pressure in mV. Typical sea level
value = 3750 mV for 29.9" HG-A.
30 VACCUM_PRESS NO Reaction cell pressure in mV. Typical value = 750
mV for 6” HG.
(table continued)
10-15