78
Reference Manual
00809-0100-4021, Rev JA
HART Commissioning
April 2017
HART Commissioning
How it works:
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.
Take away: “Sensor Drift Alert detects a degrading sensor.”
Target applications: Redundant measurements, critical measurements, severe 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
“Alarm switch (HART Protocol)” on
.
Configure Sensor Drift in guided setup
Enable Sensor Drift Alert in guided setup: Fast Keys 2-1-6
1. From the
Home Screen
, select
2 Configure
.
2. Select
1 Guided Setup.
3. Select
6 Config Drift Alert.
Summary of Contents for Rosemount 3144P
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Page 16: ...6 Reference Manual 00809 0100 4021 Rev JA Introduction April 2017 Introduction ...
Page 38: ...28 Reference Manual 00809 0100 4021 Rev JA Installation April 2017 Installation ...
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