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10.9 Temperature measurement problems
Temperature measurement problems and recommended actionsTable 10-4:
Problem Possible causes Recommended actions
Temperature reading
significantly different
from process temper-
ature
• RTD failure
• Incorrect compensation factors
• Line temperature in bypass does not
match temperature in main line
• Verify that the temperature compensation
factors match the value on the sensor tag
or calibration sheet.
• If Alert A004, A016, or A017 is active, per-
form the actions recommended for that
alert.
Temperature reading
slightly different from
process temperature
• Sensor temperature not yet equalized
• Sensor leaking heat
• If the error is within the temperature speci-
fication for the sensor, there is no prob-
lem. If the temperature measurement is
outside the specification, contact
Micro Motion.
• The temperature of the fluid may be
changing rapidly. Allow sufficient time for
the sensor to equalize with the process flu-
id.
• Install thermal installation, up to but not
over, the transmitter housing.
• The electrical connection between the RTD
and the sensor may be damaged. This may
require replacing the sensor.
Inaccurate tempera-
ture data from exter-
nal device
• Wiring problem
• Problem with input configuration
• Problem with external device
• Problem with input configuration
• Verify the wiring between the transmitter
and the external device.
• Verify that the external device is operating
correctly.
• Verify the configuration of the tempera-
ture input.
• Ensure that both devices are using the
same measurement unit.
10.10 API referral problems
Problem Possible causes Recommended actions
No referred density
reading
• Line pressure, line temperature, or line
density is outside the range of the config-
ured API table
• Check process conditions.
• Ensure that the API referral application is
configured correctly for your process fluid.
See Section 4.7.
Troubleshooting
Configuration and Use Manual 175