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Reference Manual
00809-0100-4140, Rev AA
January 2017
Terminal voltage
This field shows the current terminal voltage value in volts. The terminal voltage is a
dynamic value and is directly related to the mA output value.
Terminal voltage deviation limit +/-
The Terminal Voltage Deviation Limit should be set large enough such that expected
voltage changes do not cause false failures.
Figure 5-3. Voltage Deviation Limit
Resistance
This value is the calculated resistance of the electrical loop (in
) measured during the loop
characterization procedure. Changes in the resistance may occur due to changes in the
physical condition of the loop installation. Baseline and previous baselines can be compared
to see how much resistance has changed over time.
Power supply
This value is the calculated power supply voltage of the electrical loop (in volts) measured
during the loop characterization procedure. Changes in this value may occur due to
degraded performance of the power supply. Baseline and previous baselines can be
compared to see how much the power supply has changed over time.
Severe changes in the electrical loop may inhibit HART communication or the ability to
reach alarm values. Therefore, Emerson cannot absolutely warrant or guarantee that
the correct failure alarm level (high or low) can be read by the host system at the time
of annunciation.
Summary of Contents for Rosemount 2140
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Page 14: ...4 Reference Manual 00809 0100 4140 Rev AA Introduction January 2017 Introduction ...
Page 112: ...102 Reference Manual 00809 0100 4140 Rev AA Troubleshooting January 2017 Troubleshooting ...
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