Using The Diagnostic Signal I/O Functions; Table 5-4. Dashboard Functions - Indicated Failures - Teledyne T200 User Manual

Table 5-4. Dashboard Functions - Indicated Failures

DASHBOARD
FUNCTION
Stability
Sample Flow
O3 Flow
PMT
Norm PMT
Auto Zero
HVPS
Rx Cell Temp
Box Temp
PMT Temp
IZS Temp (option)
Moly Temp
Rx Cell Press
Sample Pressure
NOx Slope
NOx Norm Offset
NO Slope
NO Norm Offset
U
SING THE
The signal I/O functions in the Utilities>Diagnostics menu allows access to the digital and
analog I/O in the analyzer. Some of the digital signals can be controlled through the Setup
menu. These signals, combined with a thorough understanding of the instrument's
principles of operation (Section 6), are useful for troubleshooting in three ways:
• The technician can view the raw, unprocessed signal level of the analyzer's critical
inputs and outputs.
• Many of the components and functions that are normally under algorithmic control of
the CPU can be manually exercised.
• The technician can directly control the signal level Analog and Digital Output signals.
This allows the technician to observe systematically the effect of directly controlling these
signals on the operation of the analyzer. Use the Utilities>Diagnostics menu to view the
raw voltage of an input signal or the Setup menu to control the state of an output voltage
or control signal.
083730200A DCN7962
Unstable concentrations; leaks
Leaks; clogged critical flow orifice
Leaks; clogged critical flow orifice
Calibration off; HVPS problem; no flow (leaks)
Auto Zero too high
Leaks; malfunctioning NO, NO
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
Malfunctioning heater; relay board communication (I
Malfunctioning heater; disconnected or broken thermocouple; relay board communication
(I 2 C 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
D S
IAGNOSTIC IGNAL
Teledyne API T200 NO/NO
INDICATED FAILURE(S)
or Auto Zero valve; O air filter cartridge exhausted
x 3
2 C bus); relay burnt out
2 C bus); 12 V power supply
2 C bus); relay burnt out
I/O F
UNCTIONS
/NO Analyzer with NumaView™ Software
2 x
137