Emerson Micro Motion 1600 - 16.27 Checking process variables

generate a strong electromagnetic field. Several methods to reduce RFI are available. Use one or more of the
following suggestions, as appropriate to your installation.
Procedure
• Use shielded cable between the output and the receiving device.
— Terminate the shielding at the receiving device. If this is impossible, terminate the shielding at the cable
gland or conduit fitting.
— Do not terminate the shielding inside the wiring compartment.
— 360-degree termination of shielding is unnecessary.
• Eliminate the RFI source.
• Move the transmitter.
16.27 Checking process variables
Micro Motion suggests that you make a record of the process variables listed below, under normal operating
conditions. This list will help you recognize when the process variables are usually high or low.
• Flow rate
• Density
• Temperature
• Tube frequency
• Pickoff voltage
• Drive gain
For troubleshooting, check the process variables under both normal flow and tubes-full no-flow conditions.
Except for flow rate, you should see little or no change between flow and no-flow conditions. If you see a
significant difference, record the values and contact customer service for assistance.
Unusual values for process variables may indicate a variety of different problems. The following table lists
several possible problems and suggested remedies.
Table 16-6: Process variables problems and remedies
Symptom Cause Suggested remedy
Steady non-zero flow rate
under no-flow conditions
Misaligned piping
(especially in new installations)
Correct the piping.
Open or leaking valve Check or correct the valve mechanism.
Bad sensor zero Rezero the flow meter. See Zero the meter.
Configuration and Use Manual Troubleshooting
MS-00809-0200-1600 May2024
Configuration and Use Manual 215