Ametek Thermox WDG-VRM, Руководство пользователя

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8-8 | Thermox WDG-V RM
Alarm and Warning Messages
AlArMs
AlArM DesCriPTion Possible Causes
Cell T/C Failure Thermocouple is not connected or is open Bad T/C, Bad connection
Cold Junction Compensator
Failure
The PCB temperature sensor has failed Bad Electronics
Cell Temperature Control A critical overtemperature condition has
occurred
Shorted, open, or Bad
T/C or Failed Temperature
Control Circuit.
Unit must be reset to clear
this alarm
Cell Over Temp Cell temperature is 4 degrees or higher
above the setpoint
Bad Thermocouple, Failed
temperature control circuit
Cell Under Temp Cell temperature is 4 degrees or lower
below the setpoint
Faulty heater, faulty heater
connection, Faulty T/C,
Faulty T/C connection,
Low Power.
Only after warm-up is
complete
Cell Temp Rise Failure Cell heater failed to heat the cell Bad Cell furnace heater,
Bad heater connection,
Shorted T/C, Bad T/C con-
nection.
Unit must be reset to clear
this alarm
Over Temp Relay Tripped The cell over-temperature relay has tripped Open Thermocouple, Over
Temperature condition,
Failed Temperature control
circuit.
Must cycle power to reset
the relay
RTD Failure The Box Temp RTD Failed Open or Shorted RTD
Low Sample Flow Low sample flow detected Loss of sample flow.
Active only after warm-up
time expires
Cell Failure (Open) Cell resistance exceeds the normal limit Bad Cell, Open Cell Con-
nection
Cell Mv Mismatch The cell mv measurement does not match
the real time cell meas
Bad A/D circuit (Bad elec-
tronics)
Analog Output 1 Error The analog output measurement does not
match the setting
Open 4-20mA loop or
failed output or bad read-
back circuit
Cell T/C Measurement Mis-
match
The Redundant temperature measurement
does not match the real time meas
Bad T/C or circuit