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Fault with ph20

Hi , Purchased an Apera ph20 this week , on the main screen it comes up r 1.0 can anyone tell me what this means please .
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I believe that this is just a "software version number" that shows when the meter is turned on.  It is in no way an error message or a fault with the meter. It momentarily displays on the LCD when you turn the meter on before it goes into the measurement mode. I hope that this helps.

I have same issue and cannot clear this reading on the machine. Did you find a solution? Thank you.
When I attempt to calibrate in the 7.0 solution the meter reads 5.3 and doesn’t move up nor down.
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