palintest ChloroSense CS 100 Instructions Manual

Contents

palintest ChloroSense CS 100 Instructions Manual Manual pdf 18 page image

18TECHNICAL INFORMATIONOperating PrincipleThe ChloroSense uses the electrochemical techniqueknown as chronoamperometry. Chronoamperometryinvolves applying a fixed voltage to a working electrodeand recording the resulting current-time dependence.The magnitude of the current is directly proportional tothe concentration of chlorine in the test sample.ChloroSense sensors have two working electrodes, onethat measures free chlorine and one that measures totalchlorine. The voltage has been selected so that free andtotal chlorine can be measured simultaneously.Once the sensor is inserted, the analysis is fullyautomatic and operator independent. The ChloroSenseprecisely controls the sensor cycle, and captures andcollates thousands of signal readings. The processorinterprets these readings to identify free and totalchlorine, and determines the exact concentration. Theinstrument display gives a direct reading of the testresult in mg/l.No user calibration is required, because each sensorbatch is assigned a 60 digit calibration code duringmanufacture. This code is used to construct a calibrationcurve that exactly matches the sensor batch. Apre-programmed, plug-in calibration chip is provided witheach pack of sensors to automatically enter thecalibration code into the instrument.