Seiko 7T85 Technical Manual page 15

TECHNICAL GUIDE
● Water resistance test
Check the water resistance according to the designated specification of the watch.
Marking on the case back
WATER RESISTANT (WATER RESIST)
WATER RESIST 5 BAR
WATER RESIST 10 BAR
WATER RESIST 15 BAR
WATER RESIST 20 BAR
SCUBA DIVER'S (AIR DIVER'S) 150 m
SCUBA DIVER'S (AIR DIVER'S) 200 m
He-GAS DIVER'S 300 m
He-GAS DIVER'S 600 m
He-GAS DIVER'S 1000 m
● Accuracy test
Measure the rate and make sure the value shows within ±0.50 s/d.
Use 10 seconds gate of the tester.
Water resistance test
Air overpressure test
Wa t e r o v e r p r e s s u r e
test and condensation
test
18.75 BAR = 150 (m) times 0.125
Wa te r- tigh tn e s s and
w a t e r o v e r p r e s s u r e
25 BAR = 200 (m) times 0.125
test and condensation
37.5 BAR = 300 (m) times 0.125
tests before/after water
75 BAR =600(m)times 0.125
overpressure test
125 BAR = 1000 (m) times 0.125
15/17
Applied pressure
3 BAR
5 BAR
10 BAR
15 BAR
20 BAR
Cal. 7T85A