Specifications

Channel Master Operation Manual
page 36 RD Instruments
a. Place the Channel Master on its side with the vertical beam facing down
and the pressure sensor port facing up. Use a soft pad to protect the
Channel Master.
b. Use a straight-slot screwdriver to remove the copper port screw on the
pressure sensor. Do not remove the pressure sensor cover.
c. A plastic bottle with silicone oil (part number 75BK6004-00) is included
in the spare parts kit. Place the tip of the bottle over the screw hole.
Ensure the plastic bottle tip is not inserted into the screw hole. Slowly
administer the oil into the cavity through the hole. Allow time for the
air to escape as you fill. Once the oil level is up into the port screw
hole, then stop filling.
d. Install the copper port screw slowly, allowing time for the oil to pass
through the port screw orifice. Tighten the screw “finger tight”
(0.226 N-m, 2 lbf-in). Do not over tighten the screw or you may strip
the threads on the plastic cover disc. If this happens, return the Channel
Master to RDI for repair.
NOTE. The Pressure sensor cavity should be checked and if needed
refilled between deployments. Only remove the copper port screw for this
inspection and re-fill.
Figure 23. Filling the Pressure Sensor Cavity with Oil