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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
9.1.3.1 Signal I/O Diagnostic
Table 9-9-4: 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 (01086) 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 M200A 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 M200A to
enter the Span Calibration mode. Use to check
external contact closure circuitry.
3 SPAN_VALVE YES Switches the IZS Zero/Span valve. Use this bit to test
the valve function.
4 CAL_VALVE YES Switches the IZS Sample/Cal valve. Use this bit to
test the valve function.
5 NOX_VALVE YES Switches the NO/NO
x
valve. Use this bit to test the
valve function.
6 RCELL_HEATER YES Shows the status of the reaction cell heater. This has
the same function as the LED in the Power Supply
Module.
7 IZS_HEATER YES Shows the status of the IZS permeation tube heater.
This has the same function as the LED in the Power
Supply Module.
8 ELEC_TEST YES Turns on electric test bit in preamp. Should be used
for troubleshooting Preamp logic lines.
We recommend you use the ELEC TEST button in
the DIAG menu to operate electric test.
9 OPTIC_TEST YES Turns on optic test bit in preamp. Should be used for
troubleshooting Preamp logic lines.
We recommend you use the OPTIC TEST button in
the DIAG menu to operate optic test.
(table continued)
9-13
PRINTED DOCUMENTS ARE UNCONTROLLED