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Teledyne API – Model T300/T300M CO Analyzer
Troubleshooting and Service
239
Table 11-1: Warning Messages - Indicated Failures
WARNING
MESSAGE
FAULT CONDITION
POSSIBLE CAUSES
BENCH TEMP
WARNING
The optical bench temp is
controlled at 48
±
2
°
C.
Bad bench heater
Bad bench temperature sensor
Bad relay controlling the bench heater
Entire relay board is malfunctioning
I
2
C bus malfunction
BOX TEMP
WARNING
Box Temp is
< 5
°
C or > 48
°
C.
NOTE: Box temperature typically runs ~7
o
C warmer than ambient
temperature.
Poor/blocked ventilation to the analyzer.
Stopped exhaust-fan
Ambient temperature outside of specified range
CANNOT DYN
SPAN
Dynamic Span operation failed
Measured concentration value is too high or low.
Concentration slope value to high or too low
CANNOT DYN
ZERO
Dynamic Zero operation failed
Measured concentration value is too high.
Concentration offset value to high.
CONFIG
INITIALIZED
Configuration and Calibration data
reset to original Factory state.
Failed disk on module
User erased data
DATA INITIALIZED
Data Storage in DAS was erased
Failed disk on module
User cleared data
PHOTO TEMP
WARNING
PHT DRIVE is
>4800 mVDC
Failed IR photo-detector
Failed sync/demod board
IR photo-detector improperly attached to the sample chamber
Bench temp too high.
REAR BOARD NOT
DET
Motherboard not detected on power
up.
Warning only appears on serial I/O com port(s)
Front panel display will be frozen, blank or will not respond.
Massive failure of motherboard
RELAY BOARD
WARN
The CPU cannot communicate with
the Relay Board.
I
2
C bus failure
Failed relay board
Loose connectors/wiring
SAMPLE FLOW
WARN
Sample flow rate is < 500 cm
3
/min
or > 1000 cm
3
/min.
Failed sample pump
Blocked sample inlet/gas line
Dirty particulate filter
Leak downstream of critical flow orifice
Failed flow sensor/circuitry
SAMPLE PRES
WARN
Sample Pressure is <10 in-Hg or
> 35 in-Hg
Normally 29.92 in-Hg at sea level
decreasing at 1 in-Hg per 1000 ft of
altitude (with no flow – pump
disconnected).
If sample pressure is < 10 in-hg:
Blocked particulate filter
Blocked sample inlet/gas line
Failed pressure sensor/circuitry
If sample pressure is > 35 in-hg:
Pressurized sample gas. Install vent
Blocked vent line on pressurized sample/zero/span gas supply
Bad pressure sensor/circuitry
06864D DCN7562
Содержание T300
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