StreamPro ADCP Operation Manual - global site

StreamPro ADCP Operation Manual9.4.3 Environmental CommandsThe StreamPro uses the following commands to control the environmentaland positional information that affects internal data processing.EC - Speed of SoundPurposeFormatRangeDefaultSets the speed of sound value used for ADCP data processing.ECnnnnnnnn = 1400 to 1600 meters per secondEC1500Recommended Setting. The default setting for this command isrecommended for most applications.DescriptionEC sets the sound speed value used by the ADCP to scale velocitydata, depth cell size, and range to the bottom. TheADCP assumes the speed of sound reading is taken at thetransducer head. See the primer for information on speed ofsound calculations.NOTE. If the EZ Speed of Sound field = 1, the ADCP overrides themanually-set EC value and calculates speed of sound using the valuesdetermined by transducer depth (ED), salinity (ES), and transducertemperature (ET). EZ also selects the source for ED, ES, and ET.ES – SalinityPurpose Sets the water’s salinity value.Format ESnnRange nn = 0 to 40Default ES0Recommended Setting. The default setting for this command isrecommended for most applications.DescriptionES sets the water’s salinity value. The StreamPro uses ES inits speed of sound calculations. The StreamPro assumes thespeed of sound reading is taken at the transducer head.P/N 95B-6003-00 (February 2008) page 47