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TECHNICAL GUIDE
IV.
VALUE CHECKING
● Coil block resistance
Coil block (A) (4002 700)
Coil block for chronograph second (4002 700)
Coil block for chronograph minute (4002 711)
Coil block for chronograph 1/100 second (4002 711)
● Upconverter coil resistance :
● Current consumption
For the whole movement
For the circuit block alone
● How to measure the current consumption
1. To measure the current consumption for the circuit block alone or for the whole move-
ment, connect the each tester of S-860 to the appropriate positive (+) or negative (-) input
terminal of the circuit block.
* When measuring the current consumption using the SEIKO Multi-Tester S-860, select the measure-
ment range as follows:
For the whole movement:
Use the range of 40 µ A of SUPPLY V (= 1.55 V) & GATE TIME (2 S)
For the circuit block alone:
Use the range of 4 µ A of SUPPLY V (= 1.55 V) & GATE TIME (2 S)
* When measuring the current consumption for the circuit block alone, be careful not to damage or de-
form the pattern of the circuit block.
2. Connect the AC component to the positive terminal for 2 seconds until a short circuit oc-
curs to reset the integrated circuit.
3. After the integrated circuit is reset, wait approximately for 10 seconds until a stable meas-
urement is obtained, and then read the measurement.
* When measuring the current consumption for the circuit block alone, be sure to protect the integrated
circuit from light.
* Refer to the illustration below to measure the current consumption for the circuit block alone.
150 Ω ~ 180 Ω
Less than 1.10 µ A (with 1.55 V supplied from a battery)
(when the STOPWATCH is not used)
Less than 0.30 µ A (with 1.55 V supplied from a battery)
24/26
2.10 KΩ ~ 2.70 KΩ
2.10 KΩ ~ 2.70 KΩ
1.80 KΩ ~ 2.40 KΩ
1.80 KΩ ~ 2.40 KΩ
Cal. 7T82A
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