Klein 3000 Quick Start Manual

Although the Klein 3000 Side Scan Sonar is an extremely reliable system,
because it is used in a physically demanding environment occasional problems
do arise. The most common problem encountered by any Side Scan Sonar
system is the telemetry fault. This would be the communication via coaxial
connections between the TPU and the Towfish. There are different causes and
different degrees of severity of a telemetry fault. The following troubleshooting
steps are recommended for the Klein 3000 Side Scan Sonar in order of
complexity beginning with the most basic fault.
The symptom of a telemetry fault is, with the TPU connected to the
Towfish via the deck cable, winch slip ring and tow cable and with the
and TPU properly
the two yellow LED's on the Demultiplexer PCB stay illuminated after the normal
boot time (approximately one minute). This indicates failure of the data
communication between the TPU and Towfish. If this should happen, de-
energize the TPU and follow the below steps in order:
1) Although the Klein 3000 Side Scan Sonar is a complex electronic device,
the telemetry connection between the Towfish Type N Connector on the
TPU and the 8 pin connector on the Towfish bulkhead is a simple single
conductor with shield 50 ohm coaxial cable connection. Check all of the
connections between the TPU and the Towfish confirming that they are
properly seated. Check the entire length of the cable for damage.
2) If all of the connections are secured, using a DVM measure the DC
Voltage (approximately 200 VDC) at the following points:
a. The Type N Connector on the back of the TPU. Carefully measure
across the center pin and the outside shell. If the 200 VDC is not
present, remove the Towfish Fuse on the back of the TPU and
replace it if necessary. This may correct your problem.
If you measure the 200 VDC at an excessive value
such as 275 VDC and the voltage switch on the
back panel of the TPU is set properly for 115 VAC
or 220 VAC depending on your voltage source,
contact Klein for technical support. Do not run
the equipment if the voltage is more than 10%
above normal operational voltage of 200 VDC.
This symptom indicates a possible failure of the
Klein 3000 Side Scan Sonar
Telemetry Faults
configured, the towfish will not come up. The indication is
Note:
TPU 200 VDC Power Supply.
computer