Emerson Rosemount 3814 - Routine Maintenance

The liquid ultrasonic meter pressure containing parts include but are not limited
to the transducer housings. These pressure containing parts are pressure tested
while attached to the meter body as a completed ultrasonic meter assembly. The
hydrostatic test is verification of the pressure containing capability of the liquid
ultrasonic meter pressure containing parts and the seals that seal them.
CAUTION
LEAKAGE OR PRESSURE CONTAINING PARTS FAILURE
Use precautions to eliminate hazards to personnel in the event of leakage or
failure of the liquid ultrasonic meter pressure containing parts or failure of the
test equipment and to prevent over-pressurization during the test procedure.
Failure to comply may result in injury to personnel or cause damage to the
equipment.
1.3 Routine maintenance
Routine maintenance operations requires adherence to all applicable regulations
and laws and safety training for personnel to perform the maintenance
operations. Review your organization’s best practices procedures before
performing routine maintenance.
1.3.1 Maintenance logs and reports
To monitor the performance health of the meter, and ensure it is operating within
acceptable specifications, routine diagnostics should be performed. Collecting a
maintenance log gives you a snapshot of the current health of the meter and
you can compare the inspection reports from previously saved logs. Use the Logs/
Reports menu and click Maintenance Logs and Reports. MeterLink displays the
Maintenance Logs and Reports dialog. Choose the time duration, log format and
collection rate for the output file and click the Start button. You can open the file
immediately after it is generated or view it at a later time. It is recommended that
a Maintenance log be collected after an upset in the system.
In establishing a baseline to be used for the trending of the meter diagnostics,
it is very helpful if a set of log files are collected immediately after the meter
has been installed in the field. Preferably, collect the log files at several velocities
within the operating range of the meter. This helps establish that the flow profile
is relatively constant throughout the meters operating range (except velocities
below 3 ft/sec where the profile may vary).
Maintenance and Troubleshooting Manual Routine Maintenance
00809-0100-3814 January2023
Rosemount 3814 Liquid Ultrasonic Flow Meter 7