Aeotec Smart Switch 6

I have a scene that looks at the smart energy switch my washer is connected to. Whenever the washer completed, i.e. the consumtions falls below 5 watts, it sends me a TTS via imperihome saying “your clothes are washed”. But: if my washer washes the laundry, it seems to stop several times and the consumtion drops each time below 5 watts, alway triggering the TTS… if that happend 3 to 5 times (depending on the chosen program) the washer is ready.
So here is my question: how can i trigger the scene if the consumtion falls below 5 watts for at least 10 minutes? (the gaps in consumption are mostly 5 to 7 minutes, definetively not longer than 10min)

Thanks a lot in advance!