Emerson Rosemount 3051S Series, Reference Manual

Page: 68 / 240

Reference Manual
00809-0100-4801, Rev FA
October 2010
Rosemount 3051S Series
3-26
Loop Test
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 v3.3
To initiate a loop test, perform the following procedure:
1. 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.
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 3-2).
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.
a. If you are performing a loop test to verify the output of a transmitter,
enter a value between 4 and 20 mA.
b. If you are performing a loop test to verify alarm levels, enter the
milliamp value representing an alarm state (see Table 3-1,
Table 3-2, and Table 3-3 on page 3-18).
5. Check the reference meter installed in the test loop to verify that it
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 current meter may be attached to the
wrong loop there may be a fault in the wiring, 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.
AMS v7.0
Right click on the device and select “Diagnostics and Test,” then “Loop test”
from the menu
.
1. 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.
2. Click
Next
after setting the control loop to manual.
3. Select desired analog output level. Click
Next
.
4. Click
Next
to acknowledge output being set to desired level.
Traditional Fast Keys
1, 2, 2
Device Dashboard
Fast Keys
3, 5, 1