LaMotte POCKETESTER EC/TDS/SAL TRACER Manual

Contents

LaMotte POCKETESTER EC/TDS/SAL TRACER Manual Manual pdf 12 page image

CALIBRATIONMeter accuracy verification should be performed on a periodic basis asneeded. If calibration is required, the meter must be in the conductivitymode to perform the calibration. The meter can perform a calibrationand store the data for each of the three ranges – low, medium and high.The automatic calibration recognition procedure will recognizeconductivity standards of 84mS (Low), 1413mS (Medium) or 12,880mS(12.88mS) (High). (See Page 5). Always calibrate in the range closest tothe expected measurement value. For salinity samples within the rangeof 1.00 to 9.99 ppt salinity, calibrate with a 12,880 mS calibrationstandard.1. Fill a sample cup to 20 mL line with a conductivity standard.NOTE: The meter allows for a 1, 2, or 3 point calibration. Ifcalibration is done for more than one point, the lowestconcentration should be done first to obtain the best accuracy.2. Insert the electrode into the standard.3. Press and hold the CAL button for approximately 5 seconds untilthe display begins to flash.4. The meter will automatically recognize and calibrate to theconductivity standard. The display will briefly indicate “SA”, ENDand then return to the measurement modeNOTE: “SA” will not appear if the calibration fails.5. The calibration range indicator will appear on the display for eachrange that is calibrated during a power on cycle.L Low Range, 84 mSM Medium Range, 1413 mSH High Range, 12.88 mS (12,880 mS)NOTE: Each time the calibration mode is entered all calibrationrange indicators will be cleared, but only the calibration data for thecurrently selected range will be replaced. The calibrations for theother two ranges will be saved even though the indicators for thoseranges are no longer displayed. Calibration of all three ranges mustbe performed during one power on period for all three calibrationrange indicators to be displayed.12