All I know is I have used one for over 2 decades, and made several thousand gallons of CS and it is still going strong.

If you cycle too fast, then the efficiency will decrease. For a second or so after switching ions will be returning to the electrodes, and plating out.

I think you want it to be fast enough that the coatings don't develop on the electrodes. I have not played with that, but if you are seeing them go alternately go black and light grey, it is too slow.

The specs I found on that unit show it to be a power on delay timer, not a cycle timer. Make sure you get one that will cycle.

Marshall

On 4/12/2020 2:12 PM, Gm Gm wrote:
Hi there:
Just wondering if anyone has done any experimenting with the timing for polarity reversal. Not doubting the 1 minute at all. But at that rate, that would be 60 cycles an hour, and 600 cycles for a 10 hour brew. Since I make several brews at a time, that is a lot of wear and tear on the relays. Does anyone know the lifetime cycles those relays can handle before failure? I am going to be using a DH 48S-2Z unit from Amazon.
   Thank you... Regards Grant.


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