Calibrate your testing equipment.

Discussion in 'General Discussions and Advice' started by Tiger eye, 14 Aug 2013.

  1. Tiger eye

    Tiger eye

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    Not calibrating your testing equipment can cost you dearly.

    I upgraded my tank and after the move my corals started sulking and I just figured that it's because of the move but in actual fact it was due to my Refractometer showing my SG being 1, 024 but after 4 weeks and corals dieing I took some water to Dorry to test for me and they found that my SG was actually 1, 030 :eek: so from last night I started doing fresh water water changes (and calibrated my Refractometer) and so far it has come down to 1, 027 and the corals has slowly started opening again :thumbup:.

    So lesson learned.
    Now to see how many corals pull through. Only time will tell.
     
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  3. RiaanP

    RiaanP Moderator

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    eish. Last place to look for a possible cause of issues.
     
  4. Gesiggie

    Gesiggie Challenge accepted

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    Shoh.. That is an interesting one.

    I guess we are too trusty of our equipment to realize that all hardware occasionally also need a tuning / cleaning / calibrating...

    Hope all remaining stock pulls through Christo, thanks for a well needed warning...
     
  5. Reefhead

    Reefhead

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    I'm in the chemical industry
    Certain meters that we use we need to calibrate them 2-3 times a day that's how reliant we are them being as accurate as possible so for me its like drummed in but a lot of people don't think about.
    pH meters for calcium reactors is another one which needs to be calibrated often.
     
    Last edited: 15 Aug 2013
  6. Reefhead

    Reefhead

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    I also don't use any conventional method to measure SG
    I measure it by weighing the salt water but I have access to very accurate scales
     
  7. Tiger eye

    Tiger eye Thread Starter

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    After two days of fresh water water changes my SG is sitting at 1, 024. So far so good;)
     
  8. carlosdeandrade

    carlosdeandrade

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    That's why I hate refractometers, they can so easily give false readings, one bump on the calibration screw and you can be out .006 points, scary thought. Glad you're back to normal.
     
    Last edited: 15 Aug 2013
  9. Tiger eye

    Tiger eye Thread Starter

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    Mine is the digital pen model.

    1376580664240.jpg
     
  10. Dian6430

    Dian6430

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    @Tiger eye where did you get the digital one?
     
    Last edited by a moderator: 26 Nov 2015
  11. Tiger eye

    Tiger eye Thread Starter

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    I bought it from a friend of mine 2 years ago. It was still sealed in the box.
     
  12. Bendor

    Bendor

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    I now calibrate my refractometer with ro before every test after I accidentally increased my SG to 1.030
    Quick, easy and worth it.
     
  13. Nemos Janitor

    Nemos Janitor

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    This looks like a conductivity meter. Does it also give readings in ms?
     
  14. Tiger eye

    Tiger eye Thread Starter

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    No it only gives temperature in Celsius and farenhigh and salinity in ppm and Specific Gravity.
     
  15. Nemos Janitor

    Nemos Janitor

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    Ok. I am almost sure that that is a conductivity meter. If it is, how it works is it measures the electricity flow between the two contacts on the tip of the instrument. These, when calibrated are far more accurate than a refractometer.

    Do you have a calibration fluid to calibrate it with or do you just use RO?
     
  16. Tiger eye

    Tiger eye Thread Starter

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    You're right yes. It did come with a calibration fluid. I was told that because it reeds the temp it ajusts and compensate automatically and therefore its much more accurate.
     
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