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What is the time accuracy for Sepam 20, 40, 80 without time synchronization.

Here is some information about the RTC (Real Time Clock) used inside Sepam (whatever the series - 20, 40 or 80):
      * The global accuracy of Sepam RTC is 5 ppm at 25°C
      * The used quartz has an accuracy of 20 ppm at 25°C
      * This leads to a global accuracy error of 25 ppm
So, the time accuracy drift of a Sepam relay will be equal to 25 ppm * 3600 * 24 = 2.16 seconds per day.
Consequently, the drift per year will be about 14 minutes under normal temperature conditions.
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