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Cond(s)/pH extension - which port is which?
Hopefully a simnple question - as per subject heading I'm wondering which port in my Cond(s)/pH extension card is which? They both take bnc fittings. I took my housing apart as I upgraded my IIex to a IIIex and when trying to calibrate one of my pH probes it only reads 10.5 no matter how many times I recalibrate in the lower port and I don't want to try the upper port in case that can damage it (I was "fairly" sure I had it in the right one).
Any advice?
thanks
Mark
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