Emerson Process Management 3422 User Manual

3-9000-743 Rev S

June 2013

To monitor the health of the Daniel 3400 Series Gas Ultrasonic Flow Meter, and ensure it is 
operating within acceptable specifications, routine diagnostics should be performed. The 
results of these diagnostic checks should be trended to indicate changes 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.

This is important since many diagnostics change slowly over time. Trending helps identify these 
changes and makes problems much more obvious than merely viewing a single inspection 
report. The Trending feature is integral to Daniel CUI (Deluxe Edition) or Daniel MeterLink which 
allows all important parameters to be trended.

Also, it is recommended that a diagnostic log file be collected after an upset in the system, 
where a slug of contaminants may have been introduced into 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).

Best Speed

n/a

5 sec.

300 min (5 hours)

10 sec

600 min (10 Hours)

30 sec.

1800 min (30 hours or 1.25 days)

1 min

3600 min (60 Hours or 2.5 days)

5 min

18000 min (300 Hours or 12.5 days)