Water Pressure Tester And Hot Plate - Casio PRT-40C Repair Manual

10-3 Water Pressure Tester and Hot Plate

Waterproof inspections are inherently performed using this method.
In addition, differing from the water resistant tester and air leak checker, since this instrument allows
pressurization up to 20 bar, this instrument is used to perform inspections in the case of inspecting the
inherent level of water resistance of the G-Shock and Diver's Watch models. (Professional diver's
watches must always be inspected with this instrument.)
However this instrument is also expensive and the inspection itself requires a relatively long time (at
least 15 minutes).
And determination of locations of defective water resistance in watches must be performed with a
water resistant tester.
Furthermore, since this is a destructive inspection, the modules of watches having defective water
resistance are destroyed as a result of performing inspections with this instrument.
It is therefore recommended to inspect waterproof using an air leak checker or water resistant tester to
confirm the absence of serious water resistance defects before using this instrument.
Tool used
NO. Code No.
1 1904 5225 Water resistant tester
2 Water pressure tester
3 1904 5345 Hot plate (100 V)
4-1 1901 9725 Power transformer (100 V to 120 V)
4-2 1901 9723 Power transformer (100 V to 220 V)
4-3 1901 9724 Power transformer (100 V to 240 V)
1) Open the valve screw and the cap.
2) Turn the press giving handle to anti-clockwise to the end.
3) Pour the water up to top of the water pressure tank.
4) Place the watch on the watch setting table which is a accessory of the water pressure tester. And
set them in the water pressure tank. If some bubbles are remained in the tank, remove them.
5) Close the cap without the valve screw. On this time water will be overflowed from the small holes of
the cap. (Even a small amount of the air should not be remained in the tank.)
Use the closing rod for the final tightening of the cap.
6) Close the valve screw.
7) Turn the pressure giving handle to clockwise. Then the water pressure value will begin to rise.
Note: In case the water pressure value do not rise, open the cap and valve screw, and turn the
pressure giving handle to clockwise and anti-clockwise for several times, and lean the water
pressure tester with pressure gauge side down.
Then small bubbles will be appeared from the small hole in the tank. After that close the cap
and valve screw again to give the water pressure by turning the pressure giving handle.
8) Stop to turn the pressure giving handle at inherent water resistant point of each watches. (The
tank should be pressurized by 1 bar for every 10 meters of water resistance.)
9) Leave the water pressure tester for 10 minutes without any operation.
10)After 10 minutes has passed, turn the pressure giving handle to anti-clockwise to release the water
pressure.
11)Open the valve screw, and then open the cap.
12)Take out the watch setting table from the water pressure tank.
13)Take the watch from the watch setting table and wipe the water on the watch with dry cloth.
Tool name
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