Remarks On Inspection And Measurement; Value Checking - Seiko 7D56A Technical Manual

Technical guide

REMARKS ON INSPECTION AND MEASUREMENT

l Value checking
How to measure the current consumption for the whole movement
1. Remove the RECHARGEABLE BAT-
TERY UNIT an INSULATOR and the
BATTERY CLAMP WITH SCREWS. and
then reassemble the OSCILLATING
WEIGHT WHEEL and OSCILLATING
WEIGHT, and tighten the SCREW tem-
porary in order to make the movement
ready for measurement.
2. Connect the (-) probe of the tester to
the input terminal (-) of the CIRCUIT
BLOCK and (+) probe to the CIRCUIT
BLOCK COVER A.
* When measuring the current consumption using
the SEIKO digital multi-tester (S-860), use the
range of 40 μ A of SUPPLY V (= 1.55 V) &
GATE TIME (2 S)
3. Swing the OSCILLATING WEIGHT as
the Illustration for more than three
seconds so that the movement detects
the electricity generation and it turns
to the normal hand movement mode.
Note: When swinging the OSCILLATING
WEIGHT, take care so as not to
touch the probes of the tester.
4. Wait for more than 10 seconds until a
stable measurement is obtained, and
then read the measurement.
5. Make sure the read value is less than
0.70 μA.
input terminal(-)
CIRCUIT BLOCK COVER A
Oscillating weight
34/44
Cal. 7D56A
-
+
-
+