Specifications

Channel Master Operation Manual
page 58 RD Instruments
ES – Salinity
Purpose Sets the water’s salinity value.
Format ESnn
Range nn = 0 to 50 parts per thousand
Default ES00
Recommended Setting. Set using WinHADCP. The default setting for
this command is recommended for most applications.
Description ES sets the water’s salinity value. The Channel Master uses
ES in its speed of sound calculations. The Channel Master as-
sumes the speed of sound reading is taken at the transducer
head.
ET – Temperature
Purpose Sets the water’s temperature value.
Format ET±nnnn
Range ±nnnn = -5.00 C to +40.00 C
Default ET2100
Recommended Setting. Use the EZ-command.
Description ET sets the temperature value of the water. The Channel Mas-
ter uses ET in its speed of sound calculations (see the primer).
The Channel Master assumes the speed of sound reading is
taken at the transducer head.
Example Convert temperatures of +14 C and -3.5 C to ET-command
values.
ET = 14.00 × 100 = 1400 = ET1400 (+ is understood)
ET = -3.50 × 100 = -350 = ET-0350
Note If the EZ Temperature field = one, the Channel Master over-
rides the manually set ET value and uses temperature from the
transducer’s temperature sensor. If the sensor is not available,
the Channel Master uses the manual ET setting.