Erratic drive gain
Possible causes and recommended actions for erratic drive gain
Table 12-5:
Possible cause
Recommended actions
Two-phase flow
Check for two-phase flow. See
.
Polarity of pick-off reversed or
polarity of drive reversed
Applicable for a 9-wire sensor. Check the wiring between the sen-
sor and the transmitter.
Foreign material
caught in sensor tubes
•
Purge the sensor tubes.
•
Replace the sensor.
12.28.1
Collect drive gain data
Drive gain data can be used to diagnose a variety of process and equipment conditions.
Collect drive gain data from a period of normal operation, and use this data as a baseline
for troubleshooting.
Procedure
1.
Navigate to the drive gain data.
2.
Observe and record drive gain data over an appropriate period of time, under a
variety of process conditions.
12.29
Check the pickoff voltage
If the pickoff voltage readings are unusually low, you may have any of a variety of process
or equipment problems.
To know whether your pickoff voltage is unusually low, you must collect pickoff voltage
data during the problem condition and compare it to pickoff voltage data from a period of
normal operation.
Drive gain and pickoff voltage are inversely proportional. As drive gain increases, pickoff
voltages decrease and vice versa.
Troubleshooting
190
Micro Motion Model 2500 Transmitters with Configurable Input/Outputs
Содержание Micro Motion 2500
Страница 8: ...Contents vi Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 10: ...Getting started 2 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 18: ...Quick start 10 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 20: ...Configuration and commissioning 12 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 124: ...Complete the configuration 116 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 130: ...Set up the Weights Measures application 122 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 132: ...Operations maintenance and troubleshooting 124 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 140: ...Transmitter operation 132 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 216: ...Using ProLink III with the transmitter 208 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 226: ...Default values and ranges 218 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Страница 237: ...NE 53 history Configuration and Use Manual 229 ...