Rosemount 1151GP - Testing the Equipment and the Loop

Reference Manual
00809-0100-4360, Rev BA
August 2008
Rosemount 1151
3-6
TESTING THE
EQUIPMENT
AND THE LOOP
Test functions verify that the transmitter, the communicator, and the loop are
in good working order. Testing is recommended whenever component failure
or a problem with loop performance is suspected.
Communicator Test
A communicator test is performed to ensure the communicator is working
properly. The HART Communicator performs a self-test after being turned on.
If a problem is detected, the communicator will list a diagnostic message.
Transmitter Test
Although the Rosemount 1151 Smart Pressure Transmitter performs
continuous self-diagnostics, a more extensive diagnostic routine can be
initiated with the transmitter test function. The transmitter test routine can
identify an electronics failure.
If the transmitter test detects a problem, messages to indicate the source of
the problem are displayed.
Loop Test
The loop test allows verification of the output of the transmitter, the integrity of
the loop, and the operation of any recorders or similar devices. If
commissioning the transmitter on the bench, repeat this test after the
transmitter has been installed in the field.
A reminder appears to set the loop to manual. Do so and proceed. The next
display selects a discrete milliampere transmitter output level. To command
the transmitter to output 4 mA, for example, select 4 mA. Check the current
meter installed in the test loop to verify that it reads 4 mA. If so, end the loop
test. If the output is not 4 mA, then the receiving meter is malfunctioning or the
transmitter requires a digital trim as described on page 4-4.
Review Configuration Data
Review of the transmitter factory configuration data is recommended.
Checking the Transmitter Output
Process variable readings can be obtained in engineering units and
milliamperes. If the milliampere display does not agree with the actual loop
reading given by a multimeter, a 4–20 mA trim is required.
The last step of start-up and commissioning is to check the transmitter output.
Obtain process variable readings in engineering units and milliamperes. If this
display does not agree with the actual loop reading given by a multimeter, a
4–20 mA trim is required (see page 4-10).
Range Points
The Rosemount 1151 Smart 4 and 20 mA range points can be viewed and
edited with these fast key sequences.
HART Comm. Fast Key Sequence 1, 2, 1, 1
HART Comm. Fast Key Sequence 1, 2, 2
HART Comm. Fast Key Sequence 1, 5
HART Comm. Fast Key Sequence 2
HART Comm. Fast Key Sequence 1, 3, 3