OHAUS STARTER 300C Instruction Manual

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Contents

EN-14 STARTER 300C Portable Conductivity Meter7 APPENDIX7.1 Conductivity standardsT(°C) 10 μS/cm 84 μS/cm 1413 μS/cm 12.88 mS/cm5 6.1 μS/cm 53 μS/cm 896 μS/cm 8.22 mS/cm10 7.0 μS/cm 60 μS/cm 1020 μS/cm 9.33 mS/cm15 8.0 μS/cm 68 μS/cm 1147 μS/cm 10.48 mS/cm20 9.0 μS/cm 76 μS/cm 1278 μS/cm 11.67 mS/cm25 10.0 μS/cm 84 μS/cm 1413 μS/cm 12.88 mS/cm30 11.0 μS/cm 92 μS/cm 1552 μS/cm 14.12 mS/cm35 12.1 μS/cm 101 μS/cm 1667 μS/cm 15.39 mS/cm7.2 Examples of temperature coefficients (α-value)Substance at 25 °C Concentration [%] Temperature coefficient α [%/°C]HCl 10 1.56KCl 10 1.88CH3COOH 10 1.69NaCl 10 2.14H2SO4 10 1.28HF 1.5 7.20α-coefficients of conductivity standards for a calculation to reference temperature of 25°CStandard Measurementtemp.: 15°CMeasurementtemp.: 20°CMeasurementtemp.: 30°CMeasurementtemp.: 35°C84 μS/cm 1.95 1.95 1.95 2.011413 μS/cm 1.94 1.94 1.94 1.9912.88 mS/cm 1.90 1.89 1.91 1.957.3 Conductivity to TDS conversion factorsConductivityAt 25 °CTDS KCl TDS NaClppm value Factor ppm value Factor84 μS 40.38 0.5048 38.04 0.4755447 μS 225.6 0.5047 215.5 0.48221413 μS 744.7 0.527 702.1 0.49691500 μS 757.1 0.5047 737.1 0.49148974 μS 5101 0.5685 4487 0.500012.88 μS 7447 0.5782 7230 0.561315 μS 8759 0.5839 8532 0.568880 mS 52.168 0.6521 48.384 0.6048