Teledyne 200A Teledyne API Model 200A NOX Analyzer Instruction Manual, 02246, Rev. G, DCN 5247 , Table 9-4: Diagnostic Mode - Signal I/O (Continued) , 9-14 PRINTED DOCUMENTS ARE UNCONTROLLED

Teledyne API Model 200A NOX Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
Table 9-4: Diagnostic Mode - Signal I/O (Continued)
No. Signal Control Description
10 BROWNOUT_RST YES Brownout reset works in conjunction with
DSP_BROWNOUT. When DSP_BROWNOUT is
set, the CPU sends a signal to reset the display and
clear the DSP_BROWNOUT.
11 CONV_HEATER YES Shows the status of the Moly heater. This has the
same function as the LED in the Power Supply
Module.
12 O3GEN_STATUS YES Switches ON/OFF power to the ozone generator.
13 AUTO_ZERO_VALVE YES Switches the AutoZero valve. Use this bit to test the
valve function.
14 PREAMP_RANGE_HI YES Switches the preamp(01105) hardware range.
Standard ranges are 2000 and 20,000 ppb. Logic high
= 20,000 ppb; logic low = 2000 ppb. M200A will
reset range to correct value based on user set range
value.
15 ST_RCEL_PRESS YES Status Bit - Reaction Cell Pressure alarm
Logic High = pressure out of acceptable range
Logic Low = pressure inside acceptable range
16 ST_ZERO_CAL YES Status Bit - Zero Calibration mode
Logic High = M200A in Zero cal mode
Logic Low = Not in Zero cal mode
17 ST_SPAN_CAL YES Status Bit - Span Calibration mode
Logic High = M200A in Span cal mode
Logic Low = Not in Span cal mode
18 ST_FLOW_ALARM YES Status Bit - Flow alarm
Logic High = Sample/Ozone flow out of spec
Logic Low = Flows within spec
19 ST_TEMP_ALARM YES Status Bit - Temperature alarm
Logic High = Rxcell, Moly, IZS, Box temps out of
spec
Logic Low = Temps within spec
20 ST_DIAG_MODE YES Status Bit - In Diagnostic mode
Logic High = M200A in Diagnostic mode
Logic Low = Not in Diag mode
(table continued)
9-14
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