Returns; Disposal - Endress+Hauser TMT122 Operating Instructions Manual

9 Trouble-shooting

Returns

Disposal

28
Application faults for TC connection
Fault
≤ ≥
Fault current
( 3.6 mA or 21 mA)
Measured value incorrect/inaccurate
9.4 Returns
Please follow the return Authorization Policy at the end of these instructions.
9.5 Disposal
Due to its construction, the DIN rail transmitter cannot be repaired. When disposing of the DIN rail
transmitter please take note of the local disposal regulations.
Cause
Sensor incorrectly connected
Defective sensor
Programming
Incorrect 2 wire connection (current
loop)
Defective DIN rail transmitter
Faulty sensor installation
Heat conducted via sensor
Transmitter programming faulty (scale) Change scale
Incorrect thermocouple setup
Incorrect cold junction setup
Offset incorrectly set up
Fault on the thermowell welded
thermo wire (coupling of interference
voltages)
Temperature DIN rail transmitter
Action/cure
Connect sensor correctly to
terminal plan (polarity)
Replace sensor
Sensor type 'RTD' setup; set up cor-
rect thermocouple
Connect the cables correctly (see
connection diagram)
Replace DIN rail transmitter
Install sensor correctly
Take note of sensor installation
length
Change parameter 'Sensor type'
See chapter 'Operation' and 'Techni-
cal data'
Check offset
Use sensor where the thermo wire is
not welded
Endress+Hauser