Using Sensor Simulation For Troubleshooting; Check The Printing; Check For Two-Phase Flow (Slug Flow) - Emerson Micro Motion 5700 Configuration And Use Manual

Configuration and Use Manual
MMI-20029769

17.29 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.

17.30 Check the printing

Procedure
1. Verify that the printer is powered.
2. Verify the physical connections.
3. Verify the network settings configuration.
4. Verify that the printer is online.
See the printer manual for descriptions of status LEDs.
5. If the printer is offline:
a) Check the paper.
b) Verify the paper cover is closed correctly.

17.31 Check for two-phase flow (slug flow)

Two-phase flow can cause rapid changes in the drive gain. This can cause a variety of measurement issues.
Procedure
1. Check for two-phase flow alerts (e.g., A105).
If the transmitter is not generating two-phase flow alerts, verify that two-phase flow limits have been
set. If limits are set, two-phase flow is not the source of your problem.
2. Check the process for cavitation, flashing, or leaks.
3. Monitor the density of your process fluid output under normal process conditions.
4. Check the settings of Two-Phase Flow Low Limit, Two-Phase Flow High Limit, and Two-Phase Flow
Timeout.
Configuration and Use Manual
Troubleshooting
March 2019
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