Unit installation

FS 70 Installation Instructions
974-24007001/4.1 45
on the “200VDC” setting and approximately 60 volts if on “TEST”
setting. The current meter should read approximately 0.15 – 0.7
amps.
3. Next turn on the display monitor, and then turn on the processing
unit. The system will start up automatically.
4.3.5 Power-Up Configuration
For the system to operate properly the trawl unit configuration must
be selected correctly. In addition, modification of these power-up
configuration parameters is done in a special mode selected after
power-up of the Processor unit.
The following sections describe the process of configuring these
parameters. These steps must be followed only when the system is
powered-up for the first time or when you have to replace the
Processing unit or the TTM Module assembly.
4.3.6 Selecting the Trawl Output Voltage
You must select the proper trawl voltage in accordance with the
under water trawl unit system you are using,
In the “OFF” position, no voltage is applied to the trawl cable.
In the “TEST” position, 60 VDC will be provided to the trawl cable.
Note: The “TEST” position is provided for the old FS 3300, 1000
meter sonar head. You must connect the test cable supplied with the
system to the front panel connector of the TTM marked “TEST
CABLE” and position the Trawl/Test switch located on the front
panel of the TTM module to “TEST”.
In the “120 V” position, 120 VDC will be provided to the trawl
cable. The 120 VDC is provided to run all FS3300, 1800 meter sonar
head. The same procedure should be used to test an FS3300 1800
meter head.
In the “200V” position, 200VDC will be provided to the trawl cable.
The 200VDC is provided to run all TS10, TS15, TS15S and the FS70
sonar heads.
NOTE: To test a TS10, TS15, TS15S and FS70 sonar head
position the trawl voltage switch to 120 VDC, connect the test
cable supplied with the system to the front panel connector
marked “TEST CABLE” and position the Trawl/Test switch
located on the front panel of the TTM Interface Unit to
“TEST”.
WARNING: Make sure you have selected the trawl voltage for
the appropriate sonar head before turning power ON.