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Operational procedures
63
850-165186 / Rev.B
How to replace the sacrificial water switch
All PI and PS sensors are equipped with a water switch, and two
different types are used. If your sensors are equipped with a
brass screw, observe the following procedure for replacement.
1
Turn the sensor upside down, and locate the brass screw.
2
Inspect the screw for wear and tear. If required, replace
the screw.
A standard commercial brass screw is used. Local supply will
normally be available, but the following specifications must be
met:
Brass, Size M5x10, DIN85A, rounded head
Before a new screw is inserted,
Aqua Shield
(or a similar
underwater lubricant) must be applied. Due to the size of the
tube, we recommend that the grease is applied from a syringe.
1
Apply
Aqua Shield
to the screw threads.
2
Insert the screw, mount firmly, but not too hard.
3
Use maximum torque 1.5 NM
A pack with ten screws and a tube of
Aqua Shield
can be
ordered from Simrad as a spare parts kit.
Aqua Shield
is manufactured by D.A.Stuart, Warrenville,
Illinois, USA (www.d-a-stuart.com).