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.s <br /> Although different brinds of conductivity meters varY. tafib *n procedures are s° <br /> -ofth A cry' calibration follows: ar for al, <br /> 1. Turn On the instrurnent,check the battery,and allow to warm up ifn; = y <br /> Rinse the codiluctivity probe and temperature <br /> probe with deionized water men plate <br /> the standard IWam At Forward nd 'vit€ usually within Soo to 1.500 <br /> UMh0A thetefem the 1000 umhos4 sohWon is appropriate to <br /> 3_ Ad err for the appropriate conductivity scate and temp=ture thenreadthe <br /> cosy <br /> If required use the " ibrate" 4ustment on the meter to con=t.the instru eur. to read <br /> the correct conductivity, <br /> The calibration process wiH be recorded on a cry 'cin log..C pies of <br /> low &I-42ch individual-iare-kept in-a-binderw-thcrofffmaThe' logs-areare reviewed. <br /> PcTiOdicW�y to assess whed2er the instrv=wl is becoming rn<mt dIfficult to <br /> therefo by the manuflicon-er.or if u <br /> e s <br /> Tuibidity measurement is subject to variations due to insaument_ dn& For this zeasm turbidity_ <br /> met=must be cabibrated befbre and after sampfing an each day and,aLksSt once more due-Mg <br /> the y. ` ` o calibrate a turbidity t=Wing is 4usted to read conecdy for <br /> a standard turbidity, _ <br /> Standard birbidity saa$t dons are wed ftvsti, according to Pic instmatio s, for e h <br /> sampling "'ent. Standard solutions for tmbiditY 3= cOmmadaffy available. These startriiirds <br /> purcLased fivsh gad discarded af ter shelf life Hve s Tary dq=ding on the <br /> brand of standards used. If prelrepared solution is used,tho opiraflon date of the solution Va <br /> be noted on the caffhration lob. <br /> Although difterents-of u#idity ratters a calibrationfor 4adl of <br /> 1« <br /> TUM on the instrututnt,cbeck the battery,and allow to Wam up ifn <br /> 23 -0 1 R.3 -4 MY14,2000 <br /> c4rof&2M . <br />