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Glossary
SNR
[Signal to Noise Ratio]. Represents a measure of SNR of the digitized acoustic
receive signal. Higher is better, typically values above 20 are desirable.
Status
Error code that is triggered by instantaneous acoustic signal problems. A
"Measurement" Status indicates that the meter is satisfied with the acoustic receive
signal and producing proper flow measurement readings.
Up and Dn
Indicates the upstream or downstream direction of acoustic signal transmission. Also
represents placement of flow sensors relative to flow direction for the purpose of identifying
“Forward” and “Reverse” flow directions.
VFmax
The flow rate that would create exactly 1-cycle (360°) of phase shift between the Upstream
and Downstream receive signals. This value is useful for the setting of the “HF” parameter
in gas applications, as it is necessary to do so at a flow rate that is higher than VFmax.
VoS
Velocity of Sound in the fluid medium. Shown in meter-selected measurement units of
either Feet/second (FPS) or Meters/second (M/S).
FS2
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