Endress+Hauser iTEMP TMT84 - Application Errors Without Messages

TMT84 Troubleshooting
Endress+Hauser 43
9.4 Application errors without messages
9.4.1 Application errors for RTD connection
Sensor types,  Page 46.
9.4.2 Application errors for TC connection
Sensor types, see page  ä 46.
Symptoms Cause Action/cure
Measured value is incorrect/
inaccurate
Incorrect sensor orientation Install the sensor correctly
Heat conducted by sensor Observe the face-to-face length of the
sensor
Device programming is incorrect (number
of wires)
Change SENSOR_CONNECTION device
function
Device programming is incorrect (scaling) Change scaling
Incorrect RTD configured Change SENSOR_TYPE device function
Sensor connection (two-wire), incorrect
connection configuration compared to
actual connection
Check the sensor connection/
configuration of the transmitter
The cable resistance of the sensor (two-
wire) was not compensated
Compensate the cable resistance
Offset incorrectly set Check offset
Sensor, sensing head defective Check sensor, sensing head
RTD connection incorrect Connect the connecting cables correctly
( ä 13)
Programming Incorrect sensor type set in the
SENSOR_TYPE device function; change to
the correct sensor type
Device defective Replace device
Symptoms Cause Action/cure
Measured value is incorrect/
inaccurate
Incorrect sensor orientation Install the sensor correctly
Heat conducted by sensor Observe the face-to-face length of the
sensor
Device programming is incorrect (scaling) Change scaling
Incorrect thermocouple type (TC)
configured
Change SENSOR_TYPE device function
Incorrect comparison measuring point set See chapter 11
Offset incorrectly set Check offset
Interference via the thermocouple wire
welded in the thermowell (interference
voltage coupling)
Use a sensor where the thermocouple wire
is not welded
Sensor incorrectly connected Connect the connecting cables correctly
(observe polarity,  ä 13)
Sensor, sensing head defective Check sensor, sensing head
Programming Incorrect sensor type set in the
SENSOR_TYPE device function; set the
correct thermocouple (TC)
Device defective Replace device