Emerson Rosemount 3814 - 1.5 MeterLink software

Figure 1-3: Trend log collection
This is important since many diagnostics change slowly over time. Trending the
maintenance logs helps identify these changes and makes problems much more
obvious than merely viewing a single inspection report. The Trending feature
is integral to MeterLink which allows all important parameters to be trended.
MeterLink supports trending files in a Microsoft
®
Excel
®
workbook from multiple
3814 meter maintenance logs. Some parameters like gain, signal level, and noise
level may show a shift over time which can be useful in detecting changes in the
meter and the installation.
Maintenance logs or Trend files to be trended must all have matching column
headings. This means the logs must be in the same units (i.e. U.S. Customary or
Metric), must have the same pressure type (i.e. gauge or absolute), and must have
the same time base (1/second, 1/minute, 1/hour, 1/day). If not, an error message
will be displayed stating the column headings do not match and the file will not be
added to the Workbook to trend list.
Archive log collection
Archive logs that may be collected and the options include:
• Daily log - generated every 24 hours on the Contract Hour.
• Hourly log - generated every hour at the top of the hour.
• Event log - collects the alarm and event log records.
Maintenance and Troubleshooting Manual Routine Maintenance
00809-0100-3814 January2023
Rosemount 3814 Liquid Ultrasonic Flow Meter 9