Troubleshooting (continued)Table 2-1:
Error Recommended action(s)
Sound velocity is outside defined limits • The meter's measured average sound veloci-
ty is outside the defined limits.
- Verify that all chords are measuring the
same Speed of Sound within about
0.15%. Look for alarms that indicate
transducer problems and resolve any of
these issues. This could include failing
transducers, debris buildup on transduc-
ers, or incorrectly entered path lengths
in the configuration.
- If the chords agree, adjust the SSMin or
SSMax using the Edit/Compare Config
utility in Daniel MeterLinkTM so the me-
ter's average speed of sound falls within
these limits.
- Collect a Maintenance log using Daniel
MeterLink and contact your Daniel serv-
ice representative.
Waveform contains an excessive amount of
noise
Use the Daniel MeterLink Meter>Signal An-
alyzer to increase the StackSize until noise
level decreases (settings can be 1 (none) 2, 4, 8,
or 16). If increasing the StackSize is not success-
ful, try turning on the filter or consult with Dan-
iel Customer Service if you are unsure of how
stacking a signal can affect the meter's opera-
tion.
2.2.1 Meter maintenance
The Monitor (Summary) includes the direction of flow measurement, velocity rate, units of
measurement, uncorrected or corrected flow (if applicable for your meter) and a bar graph
for a visual comparison between the velocities for each chord. This is the default view
displayed when you select Meter|Monitor from the toolbar.
Troubleshooting
26 Gas Ultrasonic Flow Meters
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