Specifications

07/02/01
1-7
1.5 Probe/Cable Description
The velocimeter/depth probe, in its standard configuration, is connected to the hand-held control
unit via a low drag (0.27 in. (7mm)), 60-foot (20 m) long, multi-conductor cable. The cable is
designed to withstand the rigors of long use in the field, having an internal Kevlar strength
member and a heavy polyethylene outer jacket. Additional weight may be added to the cable (up
to 25lbs. total) in order to depress the probe in high current conditions. Alternative cable lengths
of up to 100m (328 ft.) can be supplied upon request.
Although great care was taken in the design of the probe to assure maximum strength and
durability, it should not be dropped or otherwise subjected to unusual mechanical stress. All
components in the acoustic signal path are of stainless steel alloys, selected for their corrosion
resistance and low coefficient of thermal expansion. In order to minimize the possibility of
corrosion damaging the probe and cable deterioration, they should be washed down in fresh
water and allowed to dry before storage.
The velocimeter/depth probe is made up of the following 9 individual components:
• Cable penetrator (plus cable strain relief, PC board, and O-rings)
• Probe body (SS tube)
• Transceiver board
• Processor board
• Velocity transducer
• Pressure transducer
• Transducer penetrator (plus O-rings)
• Spacers (3 ea.)
• Reflector plate
Should the DIGIBAR cable require replacement, the penetrator can be removed at the probe and
the cable disconnected at the control unit. Replacement of the cable does not require
recalibration of the instrument. However, removal or replacement of other probe components
should not be attempted since their position and or settings are generally critical to calibration.