Using The Diagnostic Signal I/O Function; Table 11-1: Test Functions - Possible Causes For Out-Of-Range Values - Teledyne 200E Instruction Manual

Model 200E Instruction Manual
The acceptable ranges for these test functions are listed in Appendix A-3. The actual values
for these test functions on checkout at the factory were also listed in the Final Test and
Validation Data Sheet, which was shipped with the instrument. Values outside the
acceptable ranges indicate a failure of one or more of the analyzer's subsystems. Functions
with values that are within the acceptable range but have significantly changed from the
measurements recorded on the factory data sheet may also indicate a failure or a
maintenance item. A problem report worksheet has been provided in Appendix C (T-API
part number 04503) to assist in recording the value of these test functions. The following
table contains some of the more common causes for these values to be out of range.

Table 11-1: Test Functions - Possible Causes for Out-Of-Range Values

Test Function
NOx STB
SAMPLE Fl
OZONE FL
PMT
NORM PMT
AZERO
HVPS
RCELL TEMP
BOX TEMP
PMT TEMP
IZS TEMP (option)
MOLY TEMP
RCEL (pressure)
SAMP (pressure)
NOX SLOPE
NOX OFF
NO SLOPE
NO OFFS
Time of Day

11.1.3. Using the Diagnostic Signal I/O Function

The signal I/O parameters found under the diagnostics (DIAG) menu combined with a
thorough understanding of the instrument's theory of operation (Chapter 10) are useful for
troubleshooting in three ways:
• The technician can view the raw, unprocessed signal level of the analyzer's critical
inputs and outputs.
044100102 Rev A
Unstable concentrations; leaks
Leaks; clogged critical flow orifice
Leaks; clogged critical flow orifice
Calibration off; HVPS problem; no flow (leaks)
AutoZero too high
Leaks; malfunctioning NONOx or AutoZero valve; O
exhausted
HVPS broken; calibration off; preamp board circuit problems
Malfunctioning heater; relay board communication (I
Environment out of temperature operating range; broken thermistor
TEC cooling circuit broken; relay board communication (I
supply
Malfunctioning heater; relay board communication (I
Malfunctioning heater; disconnected or broken thermocouple; relay board
2
communication (I Z bus); relay burnt out; incorrect AC voltage configuration
Leak; malfunctioning valve; malfunctioning pump; clogged flow orifices
Leak; malfunctioning valve; malfunctioning pump; clogged flow orifices;
sample inlet overpressure;
HVPS out of range; low-level (hardware) calibration needs adjustment; span
gas concentration incorrect; leaks
Incorrect span gas concentration; low-level calibration off
HVPS out of range; low-level calibration off; span gas concentration incorrect;
leaks
Incorrect span gas concentration; low-level calibration off
Internal clock drifting; move across time zones; daylight savings time?
Troubleshooting & Repair
Indicated Failure(s)
air filter cartridge
3
2
C bus); relay burnt out
2
C bus); 12 V power
2
C bus); relay burnt out
191