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C2b. Press the SUPPLY 3.0V key of the submenu TENSION if the watch is supplied with 3.0 V.
The following screen displays :
D. Measuring the coil resistance
The measuring range is 0 - 20 kΩ.
The voltage of the ohmmeter is 0.2 V during the operation (a higher voltage than this value could corrupt the measurement).
Caution : always remove the battery before measuring. The coil should not receive electrical energy during the measurement.
D1. Press the
COIL
key on the main menu
FLASHTEST
to measure the coil resistance.
The following screen displays :
Display of the sub-submenu
SUPPLY 3.0V
Display of the sub-submenu
COIL
- To reduce the tension, press the key (or the key to increase it), by steps of 0.1 V for a
supply of 1.5 V or 0.2 V for a supply of 3.0 V.
- Identify on the screen the voltage displayed during the movement supply voltage and compare it with the data
of the manufacturer.
The measured resistance values indicate the following problems :
- Broken coil : resistance = > 20.0 kOhm
- Shortcut coil : resistance = 0
- Not suitable coil : when the measured value is different from the one indicated by the manufacturer.
The «not suitable» status generates additional consumption and shorten the battery life. Compare the measured
value to the one specified by the manufacturer.
Use the probes to supply the movement as shown on the sketch below.
Use the probes and place them as shown on the sketch below.
3.00 V
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