Specifications

Channel Master Operation Manual
page 56 RD Instruments
10.4 Environmental Commands
The Channel Master uses the following commands to control the environ-
mental and positional information that affects internal data processing.
10.4.1 Standard Environmental Commands
This section lists the most often used Environmental commands.
EC – Speed of Sound
Purpose Sets the speed of sound value used for Channel Master data
processing.
Format ECnnnn
Range nnnn = 1400 to 1600 meters per second
Default EC1500
Recommended Setting. The default setting for this command is
recommended for most applications.
Description EC sets the sound speed value used by the Channel Master to
scale velocity data, cell size, and range to the bottom. The
Channel Master assumes the speed of sound reading is taken
at the transducer head. See the primer for information on
speed of sound calculations.
Note If the EZ Speed of Sound field = 1, the Channel Master over-
rides the manually-set EC value and calculates speed of sound
using the values determined by transducer depth (ED), salinity
(ES), and transducer temperature (ET). EZ also selects the
source for ED, ES, and ET.
ED – Depth of Transducer
Purpose Sets the Channel Master transducer depth.
Format EDnnnnn
Range nnnnn = 0 to 65535 decimeters (meters x 10)
Default ED00000
Recommended Setting. Use the EZ-command (set by WinHADCP).
Description ED sets the Channel Master transducer depth. This measure-
ment is taken from sea level to the transducer faces. The
Channel Master uses ED in its speed of sound calculations.
The Channel Master assumes the speed of sound reading is