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iTEMP TMT182B
Endress+Hauser
Problem
Application errors without status messages for TC sensor connection
Problem
Measured value is incorrect/
inaccurate
Failure current (≤ 3.6 mA or
≥ 21 mA)
9.2
Diagnostic information via communication interface
Status signals
Letter/
Event
Meaning
1)
symbol
category
F
Operating
An operating error has occurred.
error
C
Service mode
The device is in the service mode (e.g. during a simulation).
S
Out of
The device is being operated outside its technical specifications (e.g. during
specification
startup or cleaning processes).
M
Maintenance
Maintenance is required.
required
N -
Not
categorized
1)
As per NAMUR NE107
Possible cause
RTD connected incorrectly.
Device programming is incorrect (e.g.
number of wires).
Incorrect programming.
Possible cause
Incorrect sensor orientation.
Heat conducted by sensor.
Device programming is incorrect
(scaling).
Incorrect thermocouple type (TC)
configured.
Incorrect reference junction set.
Interference via the thermocouple
wire welded in the thermowell
(interference voltage coupling).
Offset incorrectly set.
Faulty sensor.
Sensor is connected incorrectly.
Incorrect programming.
Diagnostics and troubleshooting
Remedy
Connect the connecting cables correctly
(terminal diagram).
Change the Connection type device
function.
Incorrect sensor type set in the Sensor
type device function. Set the correct
sensor type.
Remedy
Install the sensor correctly.
Observe the installed length of the
sensor.
Change scaling.
Change the Sensor type device function.
Set the correct reference junction.
Use a sensor where the thermocouple
wire is not welded.
Check offset.
Check the sensor.
Connect the connecting cables correctly
(terminal diagram).
Incorrect sensor type set in the Sensor
type device function. Set the correct
sensor type.
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