KH Director PH Probe won't calibrate

carjeff87

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I posted this on the ghl website forum see below

I originally had an internal leak so I opened up a 4 day old unit and fixed the pin hole leak in the tubing. The board got damaged so GHL wanted a 50 dollar inspection fee, since I opened the unit up and I figured they would deny my warranty anyways so that's why I opened up the unit. So instead of sending the unit in I ordered a new replacement board, this time I applied a protective conformal coating to protect the board from future saltwater damage. Everything went well for 1 whole day. The next day the Ph Probe lost calibration and read 0 and ever since then It's just a fancy Paper weight all other functions work even the unit says calibration was successful except it reads 0? Anybody have any Idea what else I can do before I throw this unit in the trash and go back to another solution?
 
When you do the calibration of the probe does the Acd1 or acd2 value change.
 

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Not anymore, it did when I was able to calibrate the probe.
 
When you do the calibration of the probe does the Acd1 or acd2 value change.
I forgot to reply to your post, no It doesn’t change.
 
Maybe an idiotically question - have you test to disconnect the BNC connection and afterwards connect it again? The second idiotically question - have you test to disconnect the KH director from power and after around 30 sec connect it again?

Sincerely Lasse
 

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