Emerson Rosemount 4600 Reference Manual page 23

Reference Manual
00809-0100-4022, Rev GA
2.9.1 Loop Test
Fast Keys
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.
Field Communicator
To initiate a loop test, perform the following procedure:
1.
2.
3.
4.
a.
b. If you are performing a loop test to verify alarm levels, enter the milliamp value
5.
a.
b. If the values do not match, the current meter may be attached to the wrong loop, there
After completing the test procedure, the display returns to the loop test screen to select
another output value or to end loop testing.
Configuration
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1, 2, 2
Connect a reference meter to the transmitter by shunting transmitter power through
the meter at some point in the loop.
From the Home screen, enter the Fast Key sequence below Loop Test to verify the
output of the transmitter.
Select OK after the control loop is set to manual (see
page 4).
Select a discrete milliamp level for the transmitter to output. At the Choose Analog
Output prompt select 1: 4mA, select 2: 20mA, or select 3: Other to manually input a
value.
If you are performing a loop test to verify the output of a transmitter, enter a value
between 4 and 20 mA.
representing an alarm state (see Tables 2-1and
Check the reference meter installed in the test loop to verify that it displays the
commanded output value.
If the values match, the transmitter and the loop are configured and functioning
properly.
may be a fault in the wiring, the transmitter may require an output trim, or the
reference meter may be malfunctioning.
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Configuration
September 2016
"Setting the loop to manual" on
2-2 on page 12).
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