Emerson Rosemount 3410 Series Maintenance And Troubleshooting Manual page 10

Maintenance
April 2022
from the original installation of the meter, or over time. Looking at a single inspection
report, that is either collected monthly or quarterly, can give you an indication of the
meter's health.
Figure 1-3: Trend log collection
This is important since many diagnostics change slowly overtime. 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
trending files in a Microsoft
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. gage 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 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
10
™
which allows all important parameters to be trended. MeterLink supports
® ®
Excel
Maintenance and Troubleshooting Manual
workbook from multiple 3410 Series meter
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