Teledyne 9110AH - Nitrogen oxides analyzer - Manual (Page 128)

TELEDYNE Model 9110AH NO
X
Analyzer Operator Manual, 01620, Rev. F
9-12
9.1.3.1 Signal I/O Diagnostics
Table 9-4: Diagnostic Mode - Signal I/O
No. Signal Control Description
0 DSP_BROWNOUT NO Display brownout is used to keep the display from
getting corrupted during low line voltage conditions.
Circuitry on the Status/Temp board senses low line
voltage and sets this bit. The CPU reads this and
generates the BROWNOUT_RST signal described
below.
1 EXT_ZERO_CAL NO Shows state of status input bit to cause the M9110AH
to enter Zero Calibration mode. Use to check external
contact closure circuitry.
2 EXT_SPAN_CAL NO Shows state of status input bit to cause the M9110AH
to enter the Span Calibration mode. Use to check
external contact closure circuitry.
3 EXT_LOW_SPAN NO Shows state of status input bit to switch the low span
concentration valve in the zero/span valve option
4 REMOTE_RANGE_HI NO Shows state of status input bit to switch the remote
range control from low to high range.
5 SPAN_VALVE YES Switches the Span valve. Use this bit to test the valve
function.
6 CAL_VALVE YES Switches the Cal valve. Use this bit to test the valve
function.
7 NOX_VALVE YES Switches the NO/NO
x
valve. Use this bit to test the
valve function.
8 RCELL_HEATER YES Shows the status of the reaction cell heater. This has
the same function as the LED in the PSM.
9 BLOCK_HEATER YES Shows the status of the sample flow orifice block
heater. This has the same function as the LED in the
PSM.
10 ELEC_TEST YES Turns on electric test bit in preamp. Should be used for
troubleshooting Preamp logic lines. We recommend
you use the ET button in the DIAG menu to operate
electric test.