Filter
Top Products
Model T101 Instruction Manual Troubleshooting & Service
215
WARNING
MESSAGE
FAULT CONDITION POSSIBLE CAUSES
IZS TEMP
WARNING
On units with IZS
options installed: The
permeation tube
temperature is Sample
chamber temperature
is
< 45°C or > 55°C
Bad IZS heater
Bad IZS temperature sensor
Bad relay controlling the IZS heater
Entire relay board is malfunctioning
I
2
C buss malfunction
Failure of thermistor interface circuitry on motherboard
PMT DET
WARNING
PMT detector output is
> 4995 mV
Failed PMT
Malfunctioning PMR preamp board
A/D converter circuitry failure
PMT TEMP
WARNING
PMT temperature is
Sample chamber
temperature is
< 2°C or > 12°C
Bad PMT thermo-electric cooler
Failed PMT TEC driver circuit
Bad PMT preamp board
Failed PMT temperature sensor
Loose wiring between PMT temperature sensor and PMT Preamp board
Malfunction of analog sensor input circuitry on motherboard
RCELL TEMP
WARNING
Sample chamber
temperature is
< 45°C or > 55°C
Bad reaction cell heater
Bad reaction cell temperature sensor
Bad relay controlling the reaction cell heater
Entire relay board is malfunctioning
I
2
C buss malfunction
Warning
Message
Fault Condition
Possible Causes
REAR BOARD
NOT DET
Mother Board 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 mother board.
Relay BOARD
WARN
The CPU cannot
communicate with the
Relay Board.
I
2
C buss failure
Failed relay board
Loose connectors/wiring
SAMPLE FLOW
WARN
Sample flow rate is <
500 cc/min or > 1000
cc/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
1
If sample pressure is < 10 in-hg:
o Blocked particulate filter
o Blocked sample inlet/gas line
o Failed pressure sensor/circuitry
If sample pressure is > 35 in-hg:
o Blocked vent line on pressurized sample/zero/span gas supply
o Bad pressure sensor/circuitry
SYSTEM RESET The computer has
rebooted.
This message occurs at power on.
If it is confirmed that power has not been interrupted:
Failed +5 VDC power,
Fatal error caused software to restart
Loose connector/wiring
UV LAMP
WARNING
The UV lamp intensity is
< 600mV or > 4995 mV
UV lamp is bad
Reference detector is bad
Motherboard analog sensor input circuitry has failed.
Fogged or damaged lenses/filters in UV light path
A/D converter circuitry failure
1
Normally 29.92 in-Hg at sea level decreasing at 1 in-Hg per 1000 ft of altitude
(with no flow – pump disconnected).
07266B DCN6485