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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.
4. Test the discrete input.
a. Set the remote input device to generate a known fixed current.
b. At the transmitter, choose OFFLINE MAINT > SIM, and select READ DI.
c. At the transmitter, activate Select.
d. Verify the signal at the transmitter.
e. Repeat the procedure for the other signal state.
5. Test the mA input.
a. Set the remote input device to generate a known fixed current.
b. At the transmitter, choose OFFLINE MAINT > SIM, and select READ MAI.
c. Verify the current value.
Postrequisites
• If the mA output reading at the receiving device was slightly inaccurate, you can
correct this discrepancy by trimming the output.
• If the mA output reading at the receiving device was significantly inaccurate, or if at
any step the reading was faulty, verify the wiring between the transmitter and the
remote device, and try again.
• If the mA input reading was slightly off at the transmitter, calibrate the mA signal at
the remote input device.
• If the discrete output reading is reversed, check the setting of Discrete Output Polarity.
• If the discrete input reading is reversed, check the setting of Discrete Input Polarity.
10.12.2
Perform loop tests using ProLink II
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
Follow appropriate procedures to ensure that loop testing will not interfere with existing
measurement and control loops.
ProLink II must be running and must be connected to the transmitter.
Troubleshooting
176 Micro Motion
®
9739 MVD Transmitters