Klein 4000 Series Operation And Maintenance Manual page 3

Klein Marine Systems, Inc. recommends all troubleshooting be
done by a trained technician. Some circuits in the Sonar
Transceiver and Processing Unit have voltages as high as 240 volts,
and some circuits in the sonar towfish have 1500 volts. You should
familiarize yourself with the location of these voltages before you
attempt any troubleshooting. Failure to observe these warnings
could result in injuries to personnel.
Serious damage to the sonar electronics may occur if the sonar
towfish is operated out of the water for periods longer than
15 minutes. Let the sonar cool 15 minutes or longer between
operations. Protect the sonar towfish from direct exposure to the
sun prior to and during operation in high temperature climates.
The depth rating on the transducers is 2000 meters (6562 ft).
Operations at deeper depths may damage the transducers.
When the towfish is close to the sea floor, the 400-kHz bottom
tracking (altitude) performance is not exact. Klein Marine Systems,
Inc. advises extreme caution when operating the towfish at altitudes
of less than 4 meters (13 feet).
WARNING
CAUTION
CAUTION
CAUTION
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