96
Reference Manual
00809-0100-4803, Rev GA
Operation and Maintenance
September 2017
Operation and Maintenance
Note
Use a precision resistor for optimum accuracy. When adding a resistor to the loop, ensure that the power
supply is sufficient to power the transmitter to a 23 mA (maximum high alarm) output with the
additional loop resistance.
Analog output loop test
Under the
Analog Output Verify
heading, a loop test can be performed by selecting the
Loop Test
button.
The loop test command verifies the output of the transmitter, the integrity of the loop, and the
operations of any recorders or similar devices installed in the loop.
Analog output diagnostic alerts
Two diagnostic alerts are shown under the
Diagnostics
heading.
The first is
mA Output Fixed
. This alerts the user that the 4–20 mA analog output signal is fixed at a
constant value and is not representative of the HART Primary Variable. This diagnostic alert may also be
triggered if “Loop Current Mode” is disabled, the device is in alarm, or if “Test Calculation” is running.
The second diagnostic is
mA Output Saturated
. This alerts the user that the measured Primary Variable
has exceeded the range points defined for the 4–20 mA analog output signal. The analog output is fixed
at the user-defined high or low saturation point and is not representative of the current HART Primary
Variable.
4.4
Transmitter functional tests
Figure 4-6. Transmitter Functional Tests Screen
Содержание 3051S Series
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