How do I set the temperature and operating time on my Silvercrest Sead 1800 A1 Electric Fruit Preserver And Jam Maker?

Press and turn the rotary knob for temperature (6) to the desired temperature, with increments of 1 °C; signals sound every 5 °C. Then select the operating time using the minute's rotary knob (7), also in increments of 1 min; signals sound every 5 minutes.

From the official Silvercrest Sead 1800 A1 Electric Fruit Preserver And Jam Maker manual, page 8

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