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#1

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01/09/2008, 08:52 AM

kzickovich kzickovich is offline

kzickovich is offline

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Join Date: Sep 2007

Posts: 138

Hanna tester owners

How often do you have to calabrate your testers, I have a hanna hand held tester that reads ph tds and orp. I bought it and a ro/di unit about three months ago and the tester was saying that my tds was at 28 ppm already. So I bought calabration solution and it was way out.

#2

Old

01/09/2008, 01:22 PM

kzickovich kzickovich is offline

kzickovich is offline

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Join Date: Sep 2007

Posts: 138

bump

#3

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01/09/2008, 04:59 PM

halcyon_diver halcyon_diver is offline

halcyon_diver is offline

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Join Date: Apr 2007

Location: N41.48070-W72.65107

Posts: 100

i test mine monthly, i have a tds meter as well as their ph meter

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