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TECHNICAL GUIDE
Cal. 4F32A, 8F32A, 8F33A, 8F35A
III. VALUE CHECKING
● Coil block resistance
3.6 KΩ ~ 4.0 KΩ
1. Measure the resistance w ith the coil block installed on the main plate.
2. Apply the red and black probes of the tester to the patterns of the coil lead terminal. While doing so,
take care not to touch the end portion of the coil lead term inal, as this w ill break the coil wire.
● Current consumption
For the w hole m ovem ent : Less than 1.3 µA (w ith voltage of 3.0 V supplied from a battery)
For the circuit block alone : Less than 0.9 µA (with voltage of 3.0 V supplied from a battery)
2. Apply the red and black probes of the tester to the circuit block cover and the pattern of the (–) terminal
of the circuit block, respectively.
3. After connecting the tester, contact the “ AC” terminal of the circuit block and the circuit block cover
with conductive tw eezers. Then, after approximately 20 seconds, start measurem ent, checking that
a stable measurem ent is obtained.
Measuring the coil block resistance
1. Check that the crow n is in the norm al (pushed in) position.
Measuring the current consumption for the w hole movement
Measuring the current consumption for the circuit block alone
1. Connect the tester to the input terminals (+) and (–), and contact the “ AC” and (+) term inals w ith
conductive tw eezers. Then, after approximately 10 seconds, start the m easurem ent, checking that
a stable measurem ent is obtained.
* While m easuring current consum ption, be sure to protect the circuit block from light w ith black
cloth or the like, as the light m ay increase the current consum ption, resulting in an inaccurate
measurem ent.
Note: When the current consum ption for the w hole movem ent exceeds the standard value w hile the
current consum ption for the circuit block alone is within the standard value range, a driving pulse
may be generated to com pensate for the heavy load applied on the gear train, etc. In that case,
overhaul and clean the movement parts, and then, measure the current consumption for the whole
movem ent again.
Black probe
Red probe
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