Extech PH220 - Manuals

PH220-EU-EN V3.2 8/12 2 Introduction Congratulations on your purchase of the Extech PH220 waterproof pH/mV meter. This microprocessor-based device with tactile push-buttons is battery operated and ideal for field use. The PH220 simultaneously displays pH and temperature. The rubber holster which pro...

PH220-EU-EN V3.2 8/12 4 Calibration (pH) The sensitivity of a pH electrode degrades over time, it is very important to frequently calibrate the meter to the electrode. pH electrodes can be thought of as batteries in that they run down with time and use. Calibration is performed using standard buffer...

PH220-EU-EN V3.2 8/12 5 Measuring pH Electrodes should always be rinsed before and between samples with distilled or DI (de-ionized) water to remove all traces of storage solution, process media, or previous test solution. 1. Connect the pH electrode to the meter. 2. Turn the meter on using the on/o...