Perform Loop Tests Using The Display - Emerson Micro Motion SGM Series Configuration And Use Manual

Troubleshooting
14.4.1

Perform loop tests using the display

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.
2.
3.
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Test the mA outputs.
a. Choose OFFLINE MAINT > SIM > AO1 SIM or OFFLINE MAINT > SIM > AO2 SIM, and
select a low value, e.g., 4 mA.
Dots traverse the display while the output is fixed.
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. At the transmitter, activate Select.
d. Scroll to and select a high value, e.g., 20 mA.
Dots traverse the display while the output is fixed.
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. At the transmitter, activate Select.
Test the discrete outputs.
a. Choose OFFLINE MAINT > SIM > DO SIM, and select SET ON.
Dots traverse the display while the output is fixed.
b. Verify the signal at the receiving device.
c. At the transmitter, activate Select.
d. Scroll to and select SET OFF.
e. Verify the signal at the receiving device.
f. At the transmitter, activate Select.
Test the TPS output.
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Micro Motion Gas Specific Gravity Meters (SGM)