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.
Procedure
1. Test the mA output(s).
a. Choose Service Tools > Simulate > Simulate Outputs > mA Output Loop Test and select 4
mA.
b. 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.
c. Press OK.
d. Select 20 mA.
e. 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.
f. Press OK.
g. Choose End.
2. Test the frequency output(s).
Note
If the Weights & Measures application is enabled on the transmitter, it is not possible to
perform a loop test of the frequency output, even when the transmitter is unsecured.
a. Press Service Tools > Simulate > Simulate Outputs > Frequency Output Test, and choose
the frequency output level.
b. Read the frequency signal at the receiving device and compare it to the
transmitter output.
c. Choose End.
3. Test the discrete output(s).
a. Press Service Tools > Simulate > Simulate Outputs > Discrete Output Test.
b. Choose Off.
c. Verify the signal at the receiving device.
d. Press OK.
Troubleshooting
Configuration and Use Manual 193
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