jonas503 Posted March 1, 2017 Share Posted March 1, 2017 Just got this today and did the calibration with the distilled water they gave me. Then when I test my water it comes up as this. Obviously if it was that everything would be dead. What am I doing wrong? Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Bevo5 Posted March 1, 2017 Share Posted March 1, 2017 So you bottomed it out to zero, or did you use the 35 solution? Either way you shouldn't be that far off. I'd mix up little bit of salt water in a bucket and measure that to just as a test. Add a bit of salt and then more salt and make sure it's reading the increase. But this is a pretty basic tool - if you're getting the right reading on the calibration fluid then it should be working and ready to go. Do you have any other way of measuring the salinity at the moment? Maybe borrow another one or something to double test it. Who knows...I've seen crazier things. Quote Link to comment Share on other sites More sharing options...
WingRider62 Posted March 1, 2017 Share Posted March 1, 2017 Ive always used RO water to calibrate. Quote Link to comment Share on other sites More sharing options...
jonas503 Posted March 1, 2017 Author Share Posted March 1, 2017 Found out they sent me wrong calibration fluid so I used rodi and was fine. Thanks Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
xmas_one Posted March 2, 2017 Share Posted March 2, 2017 Contrary to popular belief, you do not use RO, or distilled water to calibrate a refractometer. Here's more than you ever wanted to know about refractometers: http://reefkeeping.com/issues/2006-12/rhf/index.php 4 Quote Link to comment Share on other sites More sharing options...
Flash21 Posted March 2, 2017 Share Posted March 2, 2017 Ive always used RO water to calibrate. I'm with Wing always DI water to calibrate it and never fails me! Some local shops do the same. I use to buy water from local store tested theres and read the same... Quote Link to comment Share on other sites More sharing options...
Higher Thinking Posted March 2, 2017 Share Posted March 2, 2017 Calibration fluid costs just a few dollars and lasts you forever. Not sure why you'd forego that. DI is potentially problematic. 1 Quote Link to comment Share on other sites More sharing options...
milesmiles902 Posted March 2, 2017 Share Posted March 2, 2017 Calibration fluid costs just a few dollars and lasts you forever. Not sure why you'd forego that. DI is potentially problematic. **and calibrating a home-made DI/table salt solution against a known calibration fluid means you'll never have to buy one again. Quote Link to comment Share on other sites More sharing options...
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