使用说明书手册SD7000

☑SensorexPRODUCT INSTRUCTION SHEETSD7000CD Series DifferentialpH/ORP Electrode InstructionsIntroductionCongratulations on your purchase of your Sensorex SD7000CDFIG.1pH or ORP true differential electrode.Please follow instruc-tions and tips to get the maximum life out of your electrode.Electrode Care and Use Tips1.The SD7000CD pH and ORP electrodes are shipped with a capcontaining a solution of pH 4 buffer and potassium chloride.The cap should remain on the electrode until it is used.If theelectrode is used infrequently the cap and its solution shouldbe saved and the electrode stored in it.Store pH and ORPelectrodes in pH 4 buffer if soaking solution is discarded.Before using the electrode remove the soaker cap as shownin FIG 1.2.Sensorex true differential electrodes have a 1 year warrantyfrom the date etched in the electrode body as shown in FIG 2.Electrodes in inventory should be rotated so that the olderelectrodes are used first.The date code is stamped on eachelectrode by fiscal week and year(Example:4613 week 2 ofNovember 2013).3.After exposure to a sample,buffer or rinse solution,carryovercan be minimized by blotting-never by wiping-the elec-trode with a clean non-abrasive paper or a clean cloth towel.Do not use a brush on pH glass.4.As a rinse solution,measure and use a portion of the nextFIG.2sample or buffer.This action will minimize carryovercontamination.5.When calibrating pH electrodes,use a buffer close in value tothat expected from the sample for one-point calibrations or asthe second buffer for two-point calibrations (See below).Thisaction will minimize span errors.ORP electrodes are typicallynot calibrated.However,a solution to verify electrode perfor-mance should be used periodically.225mV solution,Zobell'sSensorexsolution (Part no.B225),is a good choice for single point465verification.Parts covered by this product data sheet include:SD7000CD,SD7000CD-ORPPage 1 of 8Fom:InstrSD7000-04B [Rev:2015-12-14]2014 Sensorex Corportion