Ph Probe Calibration Help

[Madreefer]

kind of frustrating as both my probes are fairly new. I've gone through 4 packs of the solution today already and have no more 7 left. Begining to think that it may be either a problem with the monitor or the controllor. Has anyone had issues with the Pinpoint products? My Pinpoint thermometer went for crap after 2 years.

[mark]

Only have one probe (got a while back from Aqua Digital) on a Milwakee monitor. I use 7 and 10 solutions and just go back and forth between them a few times, rinsing in rodi between solutions. Settles after about 3 cycles.

How's the battery on your monitor?

[Jason McK]

you should always use 7 and 10 for your Tank PH and 4 and 7 for your Reactor PH.

You will find differences if you switch the 2 that is normal. You need to calibrate to the closest numbers to what your measuring.

[MikeInToronto]

More precisely, you need to choose buffer solutions that bracket your target pH. Salt water is ~ pH 8.2 so you'd choose pH 7 and pH 10 as your buffers. Your calcium reactor has ~ pH 6.5 I think and that would be pH 4.01 and 7 buffers.