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3.3.1
It is important that the Series 4000 Sonar System be well grounded to minimize
potential hazards to the operator and electrical interference from other equipment.
A good ground for the system is a low impedance, well conducted path to sea
water. Always check the quality of the electrical ground by verifying that the AC
power source ground has no voltage potential with respect to the vessel hull.
3.3.2
The main AC power input line is protected by a switch/circuit breaker in both the
TPU and the SonarPro Workstation. The one on the TPU is located on the front
panel on the far right as shown in Figure 3-5 on page 3-18. The one on the
SonarPro Workstation is located on the pack panel just to the right of the AC
INPUT connector as shown in Figure 3-3 on page 3-10. To reset a switch/circuit
breaker, switch it to ON.
3.4
Towfish Setup
Towfish setup encompasses attaching the stabilizer fins and connecting the tow
cable. Before connecting the tow cable to the towfish, check that the retaining
bolts securing the towfish nose cone and tail cone are tight.
3.4.1
To attach the stabilizer fins:
Using a 17-mm box wrench, loosen the tail cone retaining bolt.
1.
Pull the tail cone slightly away from the towfish housing.
2.
Insert the two stabilizer fins into the slots in the tail cone.
3.
Tighten the tail cone retaining bolt.
4.
3.4.2
An armored coaxial tow cable and a winch are optionally supplied. A deck cable is
included with a TPU, and a lightweight coaxial tow cable is included with an SP-
III TPU. When connecting the tow cable, refer to Figure 3-1.
To connect the tow cable:
Verify that the supplied deck cable is not connected to the TPU or the tow
1.
cable connected to the SP-III TPU.
Attach the loop of the Kellems grip to the shackle and attach the shackle to the
2.
forward most hole in the tow bracket. Secure the shackle bolt with seizing
wire or a cable tie.
Grounding
TPU and SonarPro Workstation Circuit Breakers
Attaching the Stabilizer Fins
Connecting the Tow Cable
Towfish Setup
3-3
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