Application Errors Without Messages - Endress+Hauser iTEMP HART TMT142 Manuel De Mise En Service

TMT142
Endress+Hauser
9.3

Application errors without messages

9.3.1 Application errors in general
Error pattern
No communication
9.3.2 Application errors for RTD connection
Pt100/Pt500/Pt1000/Ni100
Error pattern
Error current
(≤ 3.6 mA or ≥ 21 mA)
Error pattern
Measured value is incorrect/
inaccurate
Cause
No power supply via the
2-wire line
250 Ω communication resistance missing
Supply voltage too low (<11 V or 8 V
without display with jumper J3)
Interface cable defective
Interface defective
Device defective
Cause
Sensor defective
Incorrect RTD connection
Incorrect 2-wire line connection
Faulty device programming (number of
wires)
Programming
Device defective
Cause
Orientation of the sensor is incorrect
Heat conducted by sensor
Faulty device programming (number of
wires)
Faulty device programming (scaling)
Incorrect RTD configured
Sensor connection (2-wire)
Line resistance of sensor (2-wire) was not
compensated
Offset incorrectly configured
Trouble-shooting
Action/cure
Connect connecting cables correctly in
accordance with terminal plan (polarity)
See Section 4.3.1 "Connecting HART
Check power supply
Check interface cable
Check interface of your PC
Replace device
Action/cure
Check sensor
Connect connecting cables correctly
(terminal plan)
Connect connecting cables correctly in
accordance with terminal plan (polarity)
Change SENSOR CONNECTION device
function
Incorrect sensor type configured in the
SENSOR TYPE device function; change to
correct sensor type
Replace device
Action/cure
Install sensor properly
Observe face-to-face length of the sensor
Change SENSOR CONNECTION device
function
Change scaling
Change SENSOR TYPE device function
Check sensor connection
Compensate line resistance
Check offset
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