Pyromation Series 441 - Manual (Page 4)

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4 of 4 441-D
Problem Possible Cause Remedy
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
(number of wires).
Change the Connection type device.
Device programming is incorrect
(scaling).
Change scaling.
Incorrect RTD configured Change the Sensor type device function.
Sensor connection. Check that the sensor is connected correctly.
The cable resistance of the sensor
(2-wire) was not compensated.
Compensate the cable resistance.
Offset incorrectly set. Check offset.
Failure current (≤ 3.6 mA or
≥ 21 mA)
Faulty sensor. Check the sensor.
RTD connected incorrectly Connect the connecting cables correctly (terminal diagram).
Incorrect device programming (e.g.
number of wires).
Change the Connection type device function.
Incorrect programming
Incorrect sensor type set in the Sensor type device function. Set the correct
sensor type.
Application errors for RTD sensor connection
Problem Possible Cause Remedy
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 the Sensor type device function.
Incorrect comparison measuring point
set.
Set the correct reference junction.
Interference via the thermocouple wire
welded in the thermowell (interference
voltage coupling).
Use a sensor where the thermocouple wire is not welded.
Offset incorrectly set. Check offset.
Failure current (≤ 3.6 mA or
≥ 21 mA)
Faulty sensor. Check the sensor.
Sensor is connected incorrectly. Connect the connecting cables correctly (terminal diagram).
Incorrect programming
Incorrect sensor type set in the Sensor type device function. Set the correct
sensor type.
Application errors for TC sensor connection