Mryon L DS pDS Techpro and Ultrameter are factory calibrated with NIST traceable standard solutions having specific conductivity/TDS values. Myron L Company Standard Solutions are made under strictly controlled conditions using reagent grade salts. These are mixed with deionized water having a resistivity of at least 5 megohm-cm purity. Myron L Company Standard Solutions are accurate within 1.0% of potassium chloride reference solutions. These solutions are traceable to National Institute of Standards of Technology Primary Solutions. The following conductivity standard solution and pH buffers are used for factory calibration. Regular use of these solutions is recommended for greatest instrument accuracy. Frequency of conductivity recalibration depends upon use but once every three months should be sufficient for an instrument used daily. pH models should be recalibrated with pH 7 buffer every 1-2 weeks with 4 and 10 buffers every 6-80 weeks. pH buffers and standard solutions available in quart and gallon plastic bottles ready to use.
