The Temp probe really does not need calibration, if you do an initial calibration make sure your reference is within .3 deg F accuracy or you might be making the accuracy worst. I calibrated mine only once in 11 years and a recent test shows it's still dead on. The salinity probe needs calibration only about once every 6 months and even then it will only be off by a very small amount.
pH and ORP require cleaning and calibration once every two months if they are kept in a low flow dark area. If not every month is better.
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05-08-2016, 09:38 AM
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