TECHNICAL GUIDE | Cal. 5J32A |
●Current consumption
For the whole movement
(while the hands are moving): Less than 0.70 ∝A (with 1.55 V supplied from a battery)
For the circuit block alone | : Less than 0.13 ∝A (with 1.55 V supplied from a battery) |
*The current consumption for the circuit block alone is approximately equivalent to that obtained while the power save function is in operation.
If the duration of charge is shorter than normal while the watch is left untouched, it is necessary to measure the current consumption while the power save function is in operation. In that case, however, measure the current consumption for the circuit block alone instead to decide if the watch is defective or not.
How to measure the current consumption for the whole movement (while the hands are moving)
1.Disassemble unnecessary parts to make the movement ready for the measurement.
Follow the disassembling procedure illustrated in this manual until you remove the rechargeable battery unit, and then, reassemble the oscillating weight. As a result, the rechargeable battery unit, insulator for rechargeable battery and rechargeable battery clamp are removed from the movement.
2.Apply the minus terminal to “a” portion in the illustration and plus terminal to the circuit block cover A, respectively.
“a” portion
Circuit block cover A
3.For a few seconds after the probes of the tester are applied to the movement, the IC is in the quick start mode, and current consumption cannot be measured properly. To switch the IC from the quick start to the normal hand movement mode, move the oscillating weight from side to side continuously for more than three seconds with the tester connected to the movement. The IC will detect the electricity generation and will be switched to the normal hand movement mode.
Note: When moving the oscillating weight from side to side, take care lest the minus terminal of the tester touches the oscillating weight.
Oscillating weight
4.After checking that the IC has been switched to the normal hand movement mode and a stable measurement can be obtained, read the measurement.
If the measurement value remains high or unstable, repeat step “3” above.
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