Emerson Rosemount 3051 Reference Manual page 73

Reference Manual
00809-0100-4001, Rev JA
Field communicator
Traditional 4-20 mA Fast Keys
Traditional 1-5 Vdc Fast Keys
Device Dashboard Fast Keys
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 value representing an
5.
a.
b. If the values do not match, the meter may be attached to the wrong loop, there may be
After completing the test procedure, the display returns to the Loop Test screen to choose
another output value or to end loop testing.
Configuration
a. For 4-20 mA HART output, connect a reference meter to the transmitter by either
connecting the meter to the test terminals on the terminal block, or shunting
transmitter power through the meter at some point in the loop.
b. For 1-5 Vdc Low Power HART output, connect a reference meter to the V
From the HOME screen, enter the fast key sequence "Loop Test" to verify the output of
the transmitter.
Select OK after the control loop is set to manual (see
page 40).
Select a discrete milliamp level for the transmitter to output. At the CHOOSE ANALOG
OUTPUT prompt select 1: 4mA (1 Vdc), select 2: 20mA (5 Vdc), 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 (1 and 5 Vdc).
alarm state (see Tables 3-3, 3-4, and
Check that the reference meter displays the commanded output value.
If the values match, the transmitter and the loop are configured and functioning
properly.
a fault in the wiring or power supply, the transmitter may require an output trim, or the
reference meter may be malfunctioning.
Section 3: Configuration
"Setting the loop to manual" on
3-5 on page 61).
November 2012
1, 2, 2
1, 2, 2
3, 5, 1
terminal.
out
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