17.26 Check grounding
A sensor and the transmitter must be grounded. If the core processor is installed as part of the transmitter or
the sensor, it is grounded automatically. If the core processor is installed separately, it must be grounded
separately.
Prerequisites
You will need an:
• Installation manual for your sensor
• Installation manual for your transmitter (remote-mount installations only)
Procedure
Refer to the sensor and transmitter installation manuals for grounding requirements and instructions.
17.27 Perform loop tests
A loop test is a way to verify that the transmitter and the remote device are communicating properly. A loop
test also helps you know whether you need to trim mA Outputs.
Prerequisites
• Before performing a loop test, configure the channels for the transmitter inputs and outputs that will be
used in your application.
• Follow appropriate procedures to ensure that loop testing will not interfere with existing measurement
and control loops.
Related information
Perform loop tests using the display
Perform loop tests using ProLink III
Perform loop tests using the Field Communicator
17.27.1 Perform loop tests using the display
Procedure
1. Test the mA output(s).
a) Choose Menu > Service Tools > Output Simulation and select the mA output to test.
b) Set Simulation Value to 4.
c) Start the simulation.
d) Read the mA current at the receiving device and compare it to the transmitter output.
The readings do not need to match exactly. If the values are slightly different, you can correct
the discrepancy by trimming the output.
e) Choose New Value.
f) Set Simulation Value to 20.
Configuration and Use Manual Troubleshooting
MMI-20025166 March 2019
Configuration and Use Manual 291
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