45
7-3-2. Application errors for TC connection
Sensor types
→
pag 42.
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
measurement point set
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, page
8)
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
