Vivitar 786HD User Manual page 15

NOTE:
 A single hair or grain of sand can cause a leak. You can test by closing the case without
inserting the camera. Submerse the case completely in water for about a minute. Remove
the case from the water, dry off its exterior with a towel, and then open the case. If the
entire interior is dry, the case is safe for use under water.
 Before opening the waterproof casing and putting the device in, carefully check whether
the waterproof ring of the casing is flat and smooth.
 After placing the device into the waterproof casing and closing the cover, carefully check
whether the waterproof ring is deformed due to pressure.
 After every use in salt water you will need to rinse the outside of the housing with non-salt
water and dry. Not doing this can eventually cause corrosion of the hinge pin and salt
buildup in the seal, which can cause failure.
 To clean the seal, rinse in fresh water and shake dry (drying with a cloth may cause lint to
compromise the seal). Re-install the seal into the grooves of the housing.
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