Specifications

Channel Master Operation Manual
P/N 95B-6001-00 (January 2005) page 25
8.4.2 Housing Assembly Replacement
a. Set the Housing assembly on its end on a soft pad.
b. Make sure all printed circuit boards, spacers, cables, and screws have
been installed.
c. Inspect, clean, and lubricate the O-ring on the housing (see “O-Ring In-
spection and Replacement,” page 24).
CAUTION. Follow all the steps for O-Ring Inspection and Replacement.
The watertight integrity of the Channel Master depends on this seal.
d. Connect the internal I/O connector to the plug on the top PC Board.
e. Install two fresh bags of desiccant just before closing the Channel Mas-
ter (see “Desiccant Bags,” page 31).
f. Gently lower the transducer head assembly into the housing assembly,
aligning the mating holes and the making sure that the I/O cable connec-
tor pins on the housing are facing the vertical beam on the transducer
head. When mating the housing with the transducer head flange try to
apply equal pressure to all parts of the O-ring. Make sure the face O-
ring remains in the retaining groove.
CAUTION. Check that no wires or any other object is pinched between the
transducer head assembly and the housing. Use rubber bands to hold the
wiring in place as necessary. If the O-ring is not in the groove or if a
wire or other object is pinched, the Channel Master will flood.
NOTE. Make sure the I/O cable connector pins are facing the vertical
transducer beam.
g. Examine the titanium housing assembly bolts, split washer, and flat
washers (M6) for corrosion: replace if necessary. Figure 16, page 23
shows the assembly order of the transducer mounting hardware. All
hardware items are needed to seal the Channel Master properly.
h. Install all four sets of hardware but leave the housing hardware loose
enough to not make an airtight seal. You should be able to see a gap be-
tween the housing and transducer head. Slide a small wedge (a folded
piece of paper or credit card) between the housing and transducer head
to maintain the gap. Be careful not to dislodge the O-ring from the O-
ring groove.