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Troubleshooting and Service
Teledyne API – Model T300/T300M CO Analyzer
258
Table 13-1: Warning Messages – Indicated Failures (cont.)
WARNING
MESSAGE
FAULT CONDITION
POSSIBLE CAUSES
SAMPLE TEMP
WARN
Sample temperature is < 10
o
C or >
100
o
C.
Ambient temperature outside of specified range
Failed bench heater
Failed bench temperature sensor
Relay controlling the bench heater
Failed relay board
I
2
C bus
SOURCE WARNING
Occurs when CO Ref is <1250
mVDC or >4950 mVDC.
Either of these conditions will result
in an invalid M/R ratio.
GFC Wheel stopped
Failed sync/demod board
If status LEDs on the sync/demod board ARE flashing the cause is
most likely a failed:
IR source
Relay board
I
2
C bus
IR photo-detector
SYSTEM RESET
The computer has rebooted.
This message occurs at power on. If you have not cycled the power
on your instrument:
5 VDC power,
Fatal error caused software to restart
Loose connector/wiring
WHEEL TEMP
WARNING
The filter wheel temperature is
controlled at 68
±
2
°
C
Blocked cooling vents below GFC Assembly. Make sure that
adequate clear space beneath the analyzer.
Analyzer’s top cover removed
Wheel heater
Wheel temperature sensor
Relay controlling the wheel heater
Entire relay board
I
2
C bus
12.1.2.
FAULT DIAGNOSIS WITH TEST FUNCTIONS
Besides being useful as predictive diagnostic tools, the test functions viewable from the
front panel can be used to isolate and identify many operational problems when
combined with a thorough understanding of the analyzer’s Theory of Operation (see
Section 13).
The acceptable ranges for these test functions are listed in the “Nominal Range” column
of the analyzer
Final Test and Validation Data Sheet
(T300, P/N 04307 and T300M,
P/N 04311) shipped with the instrument. Values outside these acceptable ranges
indicate a failure of one or more of the analyzer’s subsystems. Functions whose values
are still within the acceptable range but have significantly changed from the
measurement recorded on the factory data sheet may also indicate a failure.
Note
A worksheet has been provided in Appendix C to assist in recording the
value of these test functions. This worksheet also includes expected
values for the various test functions.
06864B DCN6314
Содержание T300
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