Seiko V157A - Water Resistance; Water Resistance Checking Methods; Accuracy Check; Instantaneous Rate Accuracy Check

TECHNICAL GUIDE
Cal. V157A/V158A
18/18
l CHECKING THE WATER RESISTANCE
l CHECKING THE ACCURACY - INSTANTANEOUS RATE
Measure the rate and make sure the value shows within ±0.50 s/d.
Use 10-second gate of the tester.
Marking on the case back Test method Applied pressure
WATER RESISTANT (WATER RESIST)
3 BAR
WATER RESIST 5BAR
5 BAR
WATER RESIST 10BAR 10 BAR
WATER RESIST 15BAR 15 BAR
WATER RESIST 20BAR 20 BAR
SCUBA DIVER'S (AIR DIVER'S) 150 m 18.75 BAR = 150 (m) times 0.125
SCUBA DIVER'S (AIR DIVER'S) 200 m 25 BAR = 200 (m) times 0.125
He-GAS DIVER'S 300 m 37.5 BAR = 300 (m) times 0.125
He-GAS DIVER'S 600 m 75 BAR = 600 (m) times 0.125
He-GAS DIVER'S 1000 m 125 BAR = 1000 (m) times 0.125
Water pressure test
Condensation test
Condensation test
Condensation test
Water pressure test
Air leak test
Check the water resistance according to the designated specification of the watch.
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