Page 30 Analyzer Q1 Witschi Electronic Ltd
Well-functioning watch with chopping pulses Badly functioning watch with chopping pulses
Well-functioning watch without chopping pulses Badly functioning watch without chopping
pulses
16.6 End Of Life (EOL) Function
Various watches are equipped with a display for the end of the battery life (End Of Life). The step
motor of these watches performs 4 steps every 4 seconds when the battery voltage falls below a
given value (typical 1.25 V). The correct operation of this display can be tested by decreasing the
voltage.
Keep in mind the fact that the EOL function does not react immediately to a voltage change. In most
cases, the module only tests the battery voltage once a minute.
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