Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Lee GLS on July 23, 2011, 09:51:46 pm

Title: make your own calibration solution??
Post by: Lee GLS on July 23, 2011, 09:51:46 pm: anyone tried THIS (http://www.rollitup.org/hydroponics-aeroponics/328966-do-yourself-homemade-tds-calibration.html)
Title: Re: make your own calibration solution??
Post by: Jeff Brimble on July 23, 2011, 10:25:05 pm: No but triple vodkas is good, serious.
Title: Re: make your own calibration solution??
Post by: Nathanael Jones on July 23, 2011, 10:40:07 pm: Quote from: Jeff Brimble on July 23, 2011, 10:25:05 pm
No but triple vodkas is good, serious.

What's the TDS of Smirnoff again Jeff? ;D
Title: Re: make your own calibration solution??
Post by: Jeff Brimble on July 24, 2011, 07:32:29 am: Three fingers ;D
Title: Re: make your own calibration solution??
Post by: A & J Owen Window Cleaning on July 24, 2011, 07:36:29 am: waste of good vodka that :D
Title: Re: make your own calibration solution??
Post by: Jeff Brimble on July 24, 2011, 11:09:14 am: Dont waste any ::) cheers ;D
Title: Re: make your own calibration solution??
Post by: L.J.Thorpe on July 24, 2011, 05:03:41 pm: Quote from: Lee GLS on July 23, 2011, 09:51:46 pm
anyone tried THIS (http://www.rollitup.org/hydroponics-aeroponics/328966-do-yourself-homemade-tds-calibration.html)
what you doing on that site anyway ;D
lot more money in that than window cleaning,hours are better too
Title: Re: make your own calibration solution??
Post by: Lee GLS on July 24, 2011, 06:49:34 pm: Quote from: L.J.Thorpe on July 24, 2011, 05:03:41 pm
Quote from: Lee GLS on July 23, 2011, 09:51:46 pm
anyone tried THIS (http://www.rollitup.org/hydroponics-aeroponics/328966-do-yourself-homemade-tds-calibration.html)
what you doing on that site anyway ;D
lot more money in that than window cleaning,hours are better too

I just looked as I didn't know what you were on about, but now I do :o, how embarrassing, I only typed in on google was diy calibration solution at that was one of the first pages :D
Title: Re: make your own calibration solution??
Post by: L.J.Thorpe on July 24, 2011, 07:31:09 pm: yeah right.....did you type rockwool ,uv lighting,aluminium wall covering and extractor fans as well???? ;D ;D ;D
Title: Re: make your own calibration solution??
Post by: john stracey on July 24, 2011, 07:43:11 pm: sounds a bit involved to me
Title: Re: make your own calibration solution??
Post by: Lee GLS on July 24, 2011, 08:01:00 pm: Quote from: L.J.Thorpe on July 24, 2011, 07:31:09 pm
yeah right.....did you type rockwool ,uv lighting,aluminium wall covering and extractor fans as well???? ;D ;D ;D

:o :o :o

How dare you !!! :D

Why would you need to know the TDS of water for marijuana growing?
Title: Re: make your own calibration solution??
Post by: Seymour Sunshine on July 24, 2011, 10:26:44 pm: Why would you want to do this?

You are only interested in the meter being fairly accurate in the 000 to 040 range - and it isn't really that important even then, is it?

Imagine having a meter ruler that is, say, 10% too long. If you're only interested in measuring things a few millimeters long and to the nearest millimeter, 10% error is not important.

And the other point is how are you going to ensure that the amount of salt that you weigh out is going to be accurate? Do you have an accurate chemical balance?

It's an interesting thing to think about, but quite impractical and unnecessary.