How often to calibrate?

Brassmusic · 06-24-2011, 05:48 AM

How often do people typically calibrate thier PH meters?

Brass

farmergiles · 06-24-2011, 06:07 AM

Once very few months, lol I should almost definitely do it more often.

A lot of people do it every week.

If you start to get unexpected readings or the readings drift you should check it immediately.

Also if you're doing hydro pH is more critical- there is no pH buffering from the medium.

Brassmusic · 06-24-2011, 06:24 AM

Quote:

Originally Posted by farmergiles

Once very few months, lol I should almost definitely do it more often.

A lot of people do it every week.

If you start to get unexpected readings or the readings drift you should check it immediately.

Also if you're doing hydro pH is more critical- there is no pH buffering from the medium.

lol yeah! Just upped nutes to 50% veg lastnight & like normal the PH spiked. So I ajusted, waited about 30m & retested. Again, ajusted... Did this about 4 times before a nice 5.8.

After it all, I calibrated (last cali was about a week before), retested & the ph was 5.8 still. It just made me wonder how often I should be calibrating. Some reads I get say to cali before every testing, others weekly to monthly.

Brass

fenderbender · 06-24-2011, 01:07 PM

when we used them in class they were kept calibrated with a neutral solution.

Why not just keep a neutral solution like a checked bottle of water and calibrate it before each use?

Captain Cannabis · 06-24-2011, 01:18 PM

whenever i used them in a lab i calibrated before every reading

06-24-2011, 05:48 AM	#1 (permalink)
Brassmusic YaHookan Join Date: Jun 2011 Location: ... with "Jumpy" & an unnamed Dwarf. Posts: 20 Thanks: 8 Thanked 6 Times in 4 Posts	How often to calibrate? How often do people typically calibrate thier PH meters? Brass __________________ Every herb blooms in it's own sweet time. Than you pick it!

06-24-2011, 06:07 AM	#2 (permalink)
farmergiles Yahookan Join Date: Sep 2006 Location: Sick of the hatred and the lies Posts: 7,807 Thanks: 2,285 Thanked 3,750 Times in 2,554 Posts	Once very few months, lol I should almost definitely do it more often. A lot of people do it every week. If you start to get unexpected readings or the readings drift you should check it immediately. Also if you're doing hydro pH is more critical- there is no pH buffering from the medium. __________________ Cultivate a stoic calmness *Fuck the Monkeys* Every Kind of Vice

06-24-2011, 01:18 PM	#5 (permalink)
Captain Cannabis safety word: more Join Date: Jul 2001 Location: m.i.a. Posts: 13,922 Thanks: 2,705 Thanked 3,174 Times in 1,812 Posts	whenever i used them in a lab i calibrated before every reading __________________ fuck the monkeys

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