Emerson 3051S Specifikace Strana 73

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63
Reference Manual
00809-0100-4001, Rev JA
Section 3: Configuration
November 2012
Configuration
Field communicator
To initiate a loop test, perform the following procedure:
1. 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
out
terminal.
2. From the HOME screen, enter the fast key sequence “Loop Test” to verify the output of
the transmitter.
3. Select OK after the control loop is set to manual (see “Setting the loop to manual” on
page 40).
4. 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.
a. 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).
b. If you are performing a loop test to verify alarm levels, enter the value representing an
alarm state (see Tables 3-3, 3-4, and 3-5 on page 61).
5. Check that the reference meter displays the commanded output value.
a. If the values match, the transmitter and the loop are configured and functioning
properly.
b. If the values do not match, the meter may be attached to the wrong loop, there may be
a fault in the wiring or power supply, the transmitter may require an output trim, or the
reference meter may be malfunctioning.
After completing the test procedure, the display returns to the Loop Test screen to choose
another output value or to end loop testing.
Traditional 4-20 mA Fast Keys
1, 2, 2
Traditional 1-5 Vdc Fast Keys
1, 2, 2
Device Dashboard Fast Keys
3, 5, 1
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