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10.8 Use sensor simulation for troubleshooting
When sensor simulation is enabled, the transmitter reports user-specified values for mass
flow, temperature, and density. 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 flow value. If sensor simulation is enabled and the observed flow rate
does not match the simulated value, the source of the problem is likely to be somewhere
between the transmitter and the receiving 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.
For more information on using sensor simulation, see Section 7.1.
10.9 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
You will need the installation manual for your transmitter.
Procedure
1. 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.
2. Verify that the correct external fuse is used.
An incorrect fuse can limit current to the transmitter and keep it from initializing.
3. Ensure that the power supply wires are connected to the correct terminals.
4. Verify that the power supply wires are making good contact, and are not clamped to
the wire insulation.
5. Inspect the voltage label on the inside of the field-wiring compartment.
The voltage supplied to the transmitter should match the voltage specified on the
label.
Troubleshooting
192 Micro Motion
®
Model 1700 Transmitters with Analog Outputs