79
Reference Manual
00809-0200-4728, Rev SA
Troubleshooting
July 2018
Troubleshooting
Sensor degraded
(1)
WARN
SNSR 1
DEGRA
SNSR 1
WARN
SNSR 1
DEGRA
SNSR 1
The resistance of the
thermocouple loop has
exceeded the configured
threshold. This could be
caused by excess EMF.
1. Check terminal connections on the 644
terminal screws for corrosion.
2. Check the thermocouple loop for any
signs of corrosion in terminal blocks, wire
thinning, wire breaks, or faulty
connections.
3. Verify the integrity of the sensor itself.
Harsh process conditions may cause
long-term sensor failures.
Calibration error N/A N/A
The value entered for the user
trim point was not acceptable.
1. Re-trim the device, make sure the user
entered calibration points are close to the
applied calibration temperature.
Sensor out of
operating limits
(1)
SAT
SNSR 1
XX.XXX
°C
SAT
SNSR 1
XX.XXX
°C
Sensor # readings are outside
the sensor's specified range.
1. Verify the process temperature is within
the specified sensor's range. Use the
Sensor Information button to compare
with the process temperature.
2. Verify the sensor is properly wired and
connected to the terminals.
3. Verify the integrity of the sensor and
sensor lead wires. If the sensor is faulty,
repair or replace the sensor.
Terminal
temperature out of
operating limits
SAT
TERM
DEGRA
WARN
SAT
TERM
DEGRA
WARN
The terminal temperature is
outside the on-board RTD
specified operating range
1. Verify the ambient temperature is within
the device specified operating range using
the Terminal Temperature Information
Button.
1. Sensor 1 is used here as an example. If Dual Sensors are ordered this alert can apply to either sensor.
Alert name LCD screen LOI screen Problem Recommended action
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