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Configuration and Use Manual 75
Testing and Moving to Production
Operation AppendicesMaintenance and TroubleshootingCommissioning
7.3 Loop testing
A loop test is a means to:
• Verify that the mA output is being sent by the transmitter and received accurately by the
receiving devices
• Determine whether or not you need to trim the mA output
Note the following:
• During the loop test, the transmitter’s mA output will not report process data.
CAUTION! Do
not use the mA output for process control while you are performing the loop test.
• If you are using ProLink II or the Communicator, enter the fixed value in the scale that you
specified for the mA measurement point. If you specified “Don’t Know”:
- If you are using ProLink II, enter the desired value in one scale and the tool will display
the equivalent value in the other scale.
- If you are using the Communicator, you must specify the mA measurement point before
you can continue.
• The mA reading does not need to be exact. You will correct differences when you trim the mA
output. See Section 7.4.
To perform a loop test:
• Using the display, see Figure 7-4.
• Using the Communicator, see Figure 7-5.
• Using ProLink II, see Figure 7-6.