Eb - Heading Bias; Ec - Speed Of Sound; Ed - Depth Of Transducer - Teledyne WORKHORSE Operation Manual

May 2015

EB - Heading Bias

Purpose Corrects for electrical/magnetic bias between the H-ADCP heading value and the heading
reference.
Format EB±nnnnn
Range ±nnnnn = -17999 to 18000 (-179.99 to 180.00 degrees)
Default EB+00000
Recommended Setting. Use EB to counteract the effects of magnetic declination at the deployment
site. Set using SurfaceView.
Description EB is the heading angle that counteracts the electrical bias or magnetic declination be-
tween the H-ADCP and the heading source. Use the EA-command to correct for physical
heading misalignment between the H-ADCP and a vessel's centerline.
Examples A bottom-mounted H-ADCP is receiving heading from its internal compass. A navigation
map for the deployment area shows a declination of 10°10'W 1995 (9'E/year). This means
the magnetic offset in the year 2001 at this location is (- (10+10/60) + (9/60*6)) = -
9.26666 degrees. Set the EB command value to EB-926.

EC - Speed of Sound

Purpose Sets the speed of sound value used for H-ADCP 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 H-ADCP to scale velocity data, depth cell size,
and range to the bottom. The H-ADCP assumes the speed of sound reading is taken at the
transducer head. See the primer for information on speed of sound calculations.
If the EZ Speed of Sound field = 1, the H-ADCP overrides 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 H-ADCP transducer depth.
Format EDnnnnn
nnnnn = 0 to 65535 decimeters (meters x 10)
Range
Default ED00000
Recommended Setting. Use the EZ-command.
Description ED sets the H-ADCP transducer depth. This measurement is taken from sea level to the
transducer faces. The H-ADCP uses ED in its speed of sound calculations. The H-ADCP
assumes the speed of sound reading is taken at the transducer head. See the primer for
information on speed of sound calculations.
Page 148
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
WorkHorse H-ADCP Operation Manual