Emerson Rosemount 848T Reference Manual page 46

Troubleshooting
September 2019
Table 6-1: Device Status with Recommended Actions
Device status
Sensor Failure
Process Sensor
Out of Limits
Process Sensor
Saturated
Sensor High
Alert
Sensor Low Alert The temperature measurement has
Process Sensor
Excessive EMF
Cold Junction
Temperature
Out of Limits
Electronics
Temperature
Out of Limits
46
Description
The process temperature sensor cannot
be read.
The process temperature sensor is out of
the allowed operating range.
The process temperature value has
saturated and can no longer track the
actual process temperature
measurement.
The temperature measurement has gone
above the high alert configured by the
user. The alert is active.
dropped below the low alert configured
by the user. The alert is active.
There is excess voltage on the process
temperature sensors.
The cold junction compensation
temperature is outside of the allowed
operating limits.
The electronics temperature is outside of
the operating range of the transmitter.
Reference Manual
00809-0100-4848
(continued)
Recommended actions
1. Check the sensor wiring connections
and configuration.
2. Replace the temperature sensor.
3. Contact a service center if the
condition persists.
1. Verify that the appropriate sensor is
selected for the application.
2. Replace the temperature sensor
with an appropriate sensor type for
the process temperature range.
3. Contact a service center if the
condition persists.
1. Verify that the process temperature
is within the valid operating limits of
the temperature sensor and device.
2. Replace the temperature sensor.
3. Contact a service center if the
condition persists.
1. Check the process sensors and
process conditions.
2. Check the user configured alerts.
1. Check the process sensors and
process conditions.
2. Check the user configured alerts.
1. Check the sensor wiring and
connections.
2. Replace the process sensor.
3. Contact a service center if the
condition persists.
1. Verify that the electronics temperature
is within the device operating range.
2. Contact a service center if the
condition persists.
1. Make sure the device is installed in
an environment within the device
operating temperature range.
2. Contact a service center if the
condition persists.
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