Probe calibration problem

[gil716]

I just spent an hour trying to calibrate 3 different ph probes on my ACII and I'm out of ideas. During the "settling phase" for 7.0, it measures in the 6.x range - not unusual. I hit select, place the probe in the 10.0 solution, hit select again and for some reason the probe still settles in the 6.x range.

Again I tried this with three different probes. One of which calibrates correctly on a pinpoint monitor. Anyone else ever experience this?

 

[gil716]

Finally able to do a search at 2 in the morning. Someone mentioned that the temp probe should be in the solution while calibrating, but another post said that this doesn't apply to the ACII. The quest continues.

 

[gil716]

well, looks like that was the issue. recalibrated with the temp probe in the solution and everything calibrated correctly.