Emerson Rosemount 3144P Reference Manual page 87

Reference Manual
00809-0100-4021
Our solution:
How it works:
Take away:
Target
applications:
Note
Enabling drift alert option warning only will set a flag (through HART Protocol) whenever
the maximum acceptable difference between Sensor 1 and Sensor 2 has been exceeded.
For the transmitter's analog signal to go into alarm when drift alert is detected, select
Alarm in
Configure Sensor Drift in guided setup
Enable Sensor Drift Alert in guided setup: Fast Keys 2-1-6
Procedure
1. From the Home Screen, select 2 Configure.
Reference Manual
In control loops, and especially safety loops this can lead to improper
process control and potential safety hazards.
The sensor drift alert continuously monitors two sensor readings to
detect a drifting sensor. The diagnostic monitors the difference
between the two sensors, and when the difference becomes greater
than a value entered by the user, the transmitter sends an alert to
indicate a sensor drift condition.
Two sensors are connected to a dual-input transmitter where the
difference in sensor readings is continuously being measured. A
threshold is set by the user to determine when an excessive drift (i.e. a
significant delta) occurs between the two sensors. The temperature
delta between the two sensors is calculated by taking the absolute
value of the difference between Sensor 1 and Sensor 2. The user
configures the transmitter to send a digital alert or analog alarm when
the alert has been triggered. The Sensor Drift Alert does not indicate
which sensor is failing. Rather the diagnostic provides an indication of
a sensor drifting. The user should view the individual sensor output
trends on the host to determine which sensor is drifting.
"Sensor Drift Alert detects a degrading sensor."
Redundant measurements, critical measurements, severe
applications.
Alarm switch (HART Protocol).
HART Commissioning
December 2019
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