Endress+Hauser easytemp TSM 470 F, Operating Instructions Manual

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Trouble-shooting Compact RTD transmitter
14 Hauser
9 Trouble-shooting
9.1 Trouble-shooting instructions
If faults occur after commissioning or during measurement always start any fault finding
sequence using the following checklists. The user is guided to the possible fault cause
and its removal by question and answer.
9.2 Application errors without messages
9.2.1 General application errors
9.2.2 Application errors for RTD connection (Pt100)
Error Cause Action/cure
No communication
4 wire connection incorrect Re-connect correctly (see connection
diagram)
No power supply on the 2-wire
connection Check the current loop
Power supply too low (< 10 V) Check power supply
Defective interface cable Check interface cable
Defective interface Check PC interface
Defective device Replace device
Error Cause Action/cure
Fault current
(
≤
3.6 mA or
≥
21 mA)
No power supply on the M12x1
micro-connector Check current loop; the supply
should be > 10 V
Defective device Replace device
Error Cause Action/cure
Measured value incorrect/
inaccurate
Faulty sensor installation Install sensor correctly
Heat conducted by sensor Take note of sensor installation point
Transmitter setup faulty (number of
wires) Change device function ’Connection
mode’
Transmitter setup faulty (scale) Change scale
Offset incorrectly set Check offset