NexSens WQ-ORP Sensor User's Manual - Geotech Environmental ...

NexSens Technology, Inc.1.1.2 Making ORP Sensor MeasurementsPreparing ORP Sensors for Measurement1. WQ-ORP sensors are shipped with the ORP bulb kept moist. Prior to using yourWQ-ORP sensor for the first time, follow these three steps to condition yourelectrode:2. Remove the electrode from the protective storage container. Rinse the electrodetip with distilled or deionized water. (Note: Keep the protective cap or boot foruse later during storage).3. Shake the electrode down (like a thermometer) to eliminate any air bubblesinside the electrode.4. Place the electrode tip in a beaker containing 4.0 pH buffer or 4.0 M KCl. Soak for20 minutes.5. After conditioning the electrode for 20 minutes, rinse the electrode with distilledor deionized water. The electrode is now ready for calibration and to measureORP.Note: When handling ORP electrodes, rinse the electrodes with distilled water before andafter measuring a sample. Blot the end of the electrode with lint-free cloth to removeexcess water. Never wipe the electrode to remove excess water Wiping can create staticcharges that interfere with correct measurements.WQSensors User’s Manual 4