2
Operation
Apply power to the Ultrasonic Processor.
Troubleshooting
No Readings
• Is the ultrasonic insert installed in the housing and connected to
the Ultrasonic Processor?
• Is power being supplied to the Ultrasonic Processor? The
power must be within the correct voltage range. At a voltage
lower than 9VDC, performance is degraded and the unit will
shut down.
• Is the ultrasonic
insert
oriented with the arrow on the top
pointing forward toward the bow? If the insert cannot be seated
in the housing with the arrow pointing forward, check that the
arrow on the flange of the housing is pointing forward. If this is
not the case, the housing needs to be reinstalled with the
proper orientation.
Inaccurate Speed Readings
• If the ultrasonic speed sensor is ‘ON’ when the boat is
stationary, you may see a speed readout of a fraction of a knot
because of water movement under the hull.
• If the speed reading is consistently the same percentage higher
or lower than the true speed, the speed function within the
instrument needs to be re-calibrated. Follow the instructions in
your instrument owner’s manual.
Inaccurate Depth Readings or Speed Readings Above 10knots
• The sensor is installed in turbulent water. The cause may be
water intake or discharge openings, strakes, fittings, hull
irregularities upstream of the sensor, or the shape of the hull in
that area. The sensor must be reinstalled in another location.
• The ultrasonic insert is covered with aquatic growth. Clean the
active face of the sensor with a dull putty knife, being careful to
avoid scratching the surface (Figure 1 or 2). If fouling is severe,
lightly wet sand the active face with fine grade (#320) wet/dry
paper.
• Aerated water is flowing under the sensor because the boat is
designed to pull air under the hull. The sensor will not work on
this type of boat.
Replacement Parts
The information needed to order a replacement part is printed on
the unit and cable tags. Do not remove tags. When ordering,
specify the part number and date. For convenient reference,
record this information on the top of page one.
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco
USA
Tel: 803-693-0777
email: [email protected]
Airmar EMEA
Europe, Middle East, Africa
Tel: +33.(0)2.23.52.06.48
email: [email protected]
Figure 2. UST800, UST850 cables
(UST800 shown)
sensor
Copyright © 2016 – 2017 Airmar Technology Corp.
DeviceNet cable
33-565-04
screw (4)
active face
ultrasonic processor
Figure 1. UDST800 cables
sensor
Copyright © 2017 – 2020 Airmar Technology Corp.
DeviceNet cable
33-565-04
screw (4)
Copyright © 2016 – 2020
Airmar Technology Corp. All rights reserved.
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
•
www.airmar.com
active face
ultrasonic processor