SonTek, a Xylem brand
RiverSurveyor S5/M9 System Manual (February 2013)
133
Salinity: Input the water salinity (0 – 34.5 ppt) at the transducer face (freshwater = 0, sea water
= 34.5 ppt).
Figure 118. Salinity
Track Reference: Select either System (default) or Bottom-Track as a track reference
Figure 119. Track Reference
In most cases, because the M9/S5 is stationary during a measurement the System track refer-
ence will be preferred. Selecting Bottom-track as a track reference is also acceptable for dis-
charge calculations; however it will typically be used as a check against the stationary reference
in post-processing for quality assurance purposes. Both System and Bottom-Track reference
data are recorded and can be changed in post-processing if desired.
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