Teledyne 300M, Instruction Manual, Page: 60 / 123

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A
Table 5-2: I/O Signals (Continued)
# Signal Control Description
8 WHEEL_HTR YES Shows the status of the filter wheel heater. This has
the same function as the LED in the power supply
module.
9 DARK_CAL YES Turns off the detector input to the Sync/Demod board
for electronics calibration.
10 ELEC_TEST YES Activates the Electric Test diagnostic circuitry
11 BROWNOUT_RESET YES Resets the DISP_BROWNOUT circuitry described
above
12 ST_CONC_ALARM_1 YES Status Bit - gas alarm 1
Logic high = M300M in alarm 1 mode
Logic low = Not in alarm 1 mode
13 ST_CONC_ALARM_2 YES Status Bit - gas alarm 2
Logic high = M300M in gas alarm 2
Logic low = Not in alarm 2 mode
14 ST_FLOW_ALARM YES Status Bit - Flow alarm
Logic High = Sample flow out of spec
Logic Low = Flows within spec
15 ST_TEMP_ALARM YES Status Bit - Temperature alarm
Logic High = One or more temps out of spec
Logic Low = Temps within spec
16 ST_DIAG_MODE YES Status Bit - In Diagnostic mode
Logic High = M300M in Diagnostic mode
Logic Low = Not in Diag mode
17 ST_POWER_OK YES Status Bit - Power OK
Logic High = Instrument power is on
Logic Low = Instrument power is off
18 ST_PRESS_ALARM YES Status Bit - Flow alarm
Logic High = Sample pressure out of spec
Logic Low = pressure within spec
(table continued)
5-4