12
TECHNICAL GUIDE
Cal. 5M42A, 5M43A
Duration of charge
Number of swings
400
Approx. 2 days
10 seconds
700
Approx. 4 days
20 seconds
Quick movement of the second hand
when the power reserve indicator function
is activated
100
Approx. 6 hours
5 seconds
1,100
Approx. 7 days
30 seconds
2) Close the case back temporarily, and swing the watch from side to side approximately 100 times
rhythmically (at a rate of 2 to 3 times a second) with a snap of the wrist as shown in the illustration.
3) Remove the case back, and measure the voltage of the capacitor unit in the same manner as in step
1) above.
4) If the voltage obtained has increased more than 0.1V from the initial voltage assuming that the initial
voltage is within the range between 0.5V and 1.0V, the automatic generating system is operating
normally.
* To recheck the automatic generating system, leave the watch untouched for more than 5 minutes,
and then repeat steps 1) to 3) above.
Note:
If the voltage of the capacitor unit fluctuates, the movement of the second hand may not indicate the
actual power reserve. To check the relationship between the number of swings and the duration of
charge, use the power reserve indicator more than one hour after swinging the watch the number
of times specified in the above table, and then check if the watch keeps operating for the indicated
duration of charge.
Cal. 5M42A and 5M43A are so designed that the capacitor can be charged up to 2.2V. Even if the
watch is fully charged, however, the power reserve indicator can only indicate that the capacitor
voltage is more than 1.55V, which corresponds to 7 days of duration of charge, with the second hand
showing 30 seconds of quick movement. The actual duration of charge is more than 7 days when
the watch is fully charged.
Recharging information:
Number of swings required and the duration of charge until the watch stops
operating
Cal. 5M Series watches are equipped with a power reserve indicator. The current
power reserve can be checked using the second hand at the press of the button
at the 2 o’clock position.
(The table below assumes that the initial voltage of the capacitor unit is 0.5V.)
95-10
Printed in Japan