Teledyne 300 Instruction Manual page 58

# Signal
0 DISP_BROWNOUT
1 EXT_ZERO_CAL
2 EXT_SPAN_CAL
3 SYNC_OK
4 SPAN_VALVE
5 CAL_VALVE
6 BENCH_HTR
7 WHEEL_HTR
8 DARK_CAL
9 ELEC_TEST
10 BROWNOUT_RST
11 ST_ZERO_CAL
12 ST_SPAN_CAL
P/N 02163G Teledyne API Model 300 CO Analyzer Instruction Manual - Page 52
Contro
l
NO Display brownout is used to keep the
display from getting corrupted during
low line voltage conditions. Circuitry
on the Power Supply board (00015)
senses low line voltage and sets this
bit. The CPU reads this and generates
the BROWNOUT_RST
described below.
NO Shows state of status input bit to cause
the M300 to enter Zero Calibration
mode. Use to check external contact
closure circuitry.
NO Shows state of status input bit to cause
the M300 to enter the Span Calibration
mode. Use to check external contact
closure circuitry.
NO Indicates that demodulation circuitry
on the Sync/Demod Board (00798) is
able to lock-in on the detector signal.
YES Switches the Zero/Span valve. Use
this bit to test the valve function.
YES Switches the Sample/Cal valve. Use
this bit to test the valve function.
YES Shows the status of the optical bench
heater. This has the same function as
the LED in the power supply module.
YES Shows the status of the filter wheel
heater. This has the same function as
the LED in the power supply module.
YES Turns off the detector input to the
Sync/Demod board for electronics
calibration.
YES Activates the Electric Test diagnostic
circuitry.
YES Resets
circuitry described above.
YES Status Bit - Zero Calibration mode
Logic high = M300 in Zero cal mode
Logic low = Not in Zero cal mode
YES Status Bit - Span Calibration mode
Logic high = M300 in Span cal mode
Logic low = Not in Span cal mode
Description
the DISP_BROWNOUT
signal