Calibating PH Probe?

Discussion in 'Water Parameters and Additives' started by brentv, 23 Feb 2011.

  1. brentv

    brentv

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    Hi guys, I bought a 2nd hand Aqua Medic Calcium Reactor a few months ago and didn't get manuals. I have set the whole thing up and it's working really well, but I would really like to calibrate my Ph Meter. can I get Ph fluids from a chemist and which ones are right?
     
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  3. LuckyFish

    LuckyFish MASA Contributor

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    I asume you have a Aqua Medic PH controller. This one has to be calibrated with two different PH fluids. Get PH 7 and PH 9 to calibrate it. The manual says, calibrate with PH4 and 7. Which is not good. We want accurate results around PH 8. Right?;)
     
  4. brentv

    brentv Thread Starter

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    Yip Luckyfish it is an Aqua Medic one. can I get fluid from a Chemist or do I have to get from Petshop?
     
  5. rakabos

    rakabos

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    Take it to a LFS to match it to their probes...
     
  6. dallasg

    dallasg Moderator MASA Contributor

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    use can use from chemist, i agree with LuckyFish, 7 and 9 are the best
     
  7. dallasg

    dallasg Moderator MASA Contributor

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    wont work, its the meter - probe relationship and only use calibration fluids for your probe, dont base it on another ph meter reading
     
  8. LuckyFish

    LuckyFish MASA Contributor

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    I am 100% behind you on that.:thumbup:
     
  9. lIghty

    lIghty

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    Brentv, you can buy the fluid from Hanna in Pinetown, perhaps they have an office your side.

    I agree with Luckyfish and Dallas WRT calibrating probe and meter together.

    However if you are going to use the probe in the tank (pH above 7) then use 7 and 10 calibration fluids, but for a reactor where you run the pH below 7 then 7 and 4 is a better option.

    Just remember to calibrate the 7 first.
     
    Last edited: 23 Feb 2011
  10. brentv

    brentv Thread Starter

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    Yip Lighty, you are right for the Calcium reactor so gonna do 7 the 4!
    I stopped in at a swimming pool place they had an electronic PH meter and PH 7 Fluid! what I'm gonna do is take some RO water and run CO2 into it until the meter gives me 4 (guess soda water might work too Haa haa!) then bob's your auntie!

     
  11. lIghty

    lIghty

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    Not with you here, you are going to need to get both 7 and 4 Calibration fluids. don't understand what you going to do with the RO? Remember RO has no buffering ability!

    Are you going to try make your own pH4 solution, this won't work! you may as well as guess where the knob should be!

    Best to get pH4 or near that solution. Have a look in Hennie's corner, I'm sure he posted on making a pH solution.
     
  12. brentv

    brentv Thread Starter

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    So you reckon you can't make your own solution using CO2??
     
  13. lIghty

    lIghty

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    Wasting you time, sorry.

    Try a couple instrumentation shops there, someone should have.
     
  14. brentv

    brentv Thread Starter

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    Lighty sorry man an instrumentation shop??? :blush:
     
  15. lIghty

    lIghty

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    People that do instraments / gauges, or perhaps a company that does water testing etc might be able to help.

    otherwise Henna instraments here will be able to help.
     
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