Emerson Micro-Motion 2400S, Configuration And Use Manual, Page: 155 / 198

Configuration and Use Manual 147
Troubleshooting
Meas
ure
m
ent P
e
rf
ormance
Defaults
T
rou
b
le
s
ho
oti
n
g
Compensa
tion
Pocket ProLink
Pocket ProLink II v1.2 or later is required. To check the version of Pocket ProLink:
1. Start Pocket ProLink.
2. Tap the Information icon (the question mark) at the bottom of the main screen.
11.16 Checking the output wiring and receiving device
If you receive an inaccurate frequency or mA reading, there may be a problem with the output wiring
or the receiving device.
• Check the output level at the transmitter.
• Check the wiring between the transmitter and the receiving device.
• Perform a loop test.
• If appropriate, trim the mA output.
• Try a different receiving device.
• Perform output simulation to locate the problem. See Section 11.10.
11.17 Checking slug flow
A slug flow alarm is posted whenever the measured process density is outside the configured slug
flow limits (i.e., density is higher or lower than the configured normal range). Slug flow is typically
caused by gas in a liquid process or liquid in a gas process. See Section 8.8 for a discussion of slug
flow functionality.
If slug flow occurs:
• Check the process for cavitation, flashing, or leaks.
• Change the sensor orientation.
• Monitor density.
• If desired, enter new slug flow limits (see Section 8.8).
- Raising the low slug flow limit or lowering the high slug flow limit will increase the
possibility of slug flow conditions.
- Lowering the low slug flow limit or raising the high slug flow limit will decrease the
possibility of slug flow conditions.
• If desired, increase slug duration (see Section 8.8).
11.18 Checking the sensor tubes
Corrosion, erosion, or damage to the sensor tubes can affect process measurement. To check for these
conditions, perform the meter verification procedure. See Chapter 10.
11.19 Checking output saturation
If an output variable exceeds the upper range limit or goes below the lower range limit, the transmitter
produces an output saturation alarm. The alarm can mean:
• The process is outside normal operational limits.
• Sensor flow tubes are not filled with process fluid.
• Sensor flow tubes are plugged.