Using Sensor Simulation For Troubleshooting; Check Power Supply Wiring - Emerson Micro Motion 2700 Configuration And Use Manual

Troubleshooting
10.9

Using sensor simulation for troubleshooting

When sensor simulation is enabled, the transmitter reports user-specified values for basic
process variables. This allows you to reproduce various process conditions or to test the
system.
You can use sensor simulation to help distinguish between legitimate process noise and
externally caused variation. For example, consider a receiving device that reports an
unexpectedly erratic density value. If sensor simulation is enabled and the observed
density value does not match the simulated value, the source of the problem is likely to be
somewhere between the transmitter and the receiving device.
Sensor simulation requires an Enhanced Core and a communication device.
Important
When sensor simulation is active, the simulated value is used in all transmitter outputs and
calculations, including totals and inventories, volume flow calculations, and concentration
calculations. Disable all automatic functions related to the transmitter outputs and place the loop in
manual operation. Do not enable simulation mode unless your application can tolerate these effects,
and be sure to disable simulation mode when you have finished testing.
10.10

Check power supply wiring

If the power supply wiring is damaged or improperly connected, the transmitter may not
receive enough power to operate properly.
Prerequisites
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•
Procedure
1.
2.
3.
188
You will need the installation manual for your transmitter.
When using DC power, a minimum of 1.5 amps of startup current is required.
Use a voltmeter to test the voltage at the transmitter's power supply terminals.
• If the voltage is within the specified range, you do not have a power supply
problem.
• If the voltage is low, ensure that the power supply is adequate at the source, the
power cable is sized correctly, there is no damage to the power cable, and an
appropriate fuse is installed.
• If there is no power, continue with this procedure.
Before inspecting the power supply wiring, disconnect the power source.
CAUTION!
If the transmitter is in a hazardous area, wait five minutes after disconnecting the
power.
Ensure that the terminals, wires, and wiring compartment are clean and dry.
Micro Motion Model 2700 Transmitters with Intrinsically Safe Outputs