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Old 03-05-2014, 07:55 PM   #11
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Originally Posted by Ilan34 View Post
Sorry, not to challenge you or anything, but do you have a source on the distilled water thing? I was under the impression that you can rinse the probe in between readings with distilled. And why would tap water be OK to store the probe?

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Not a good scientific source, just the instruction booklet that came with my last 2 meters. 1 was a Hannah Checker (pen style) that I got for about 32$. My new one is a Bluelab (brick and probe style) and was closer to 170$. For the price, I'm not willing to object to their maintenance recommendations. You may be fine, as a previous poster has said, with a quick dip. But if storage in RO or DI water is not good for it, it stands to reason that it's not great in the short term either. This is why I rinse in between applications with tap water as recommended by the manufacturer. Your probe has a life span and will go bad over time regardless of what you do but if i can squeeze any more time out of it by being cautious, I'm going to try.
But I'm probably just being overly paranoid. I can't imagine it makes a huge deal.

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Old 03-05-2014, 09:29 PM   #12
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Originally Posted by IslandLizard View Post
I don't really understand why the OP's pH meter needs calibration at pH 6.86. 4, 7 and 10 are the more typical benches.
I think he answered his own question when he said cheap PH meter from China in regards to calibration being unclear....
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Old 03-05-2014, 09:29 PM   #13
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Both the Chemistry and Microbiology dept. at my old work place rinsed the probe with DW and use blotting paper to remove the excess.

You store the probe in electrode store solution.

You don't touch the probe

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