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^ M <br />teeter to soun(L This Point is UsuallY dearly vVible on the probe. If it is not visible it should c <br />located by dipping the probe into a water conminer where tlxcontact,can be clearly seezz, then <br />Iced. he totallc of the water level meter should carr nd with c length of the <br />measuring tape, In addition, the individual on the mble should commpond <br />with the <br />correct footage. If the cable does not match the meastiring 6pe them the differcricc Of consistent) <br />should be calculated as a petage, (U., 100 foot cible rntasures 102, feet '�0 . All ' <br />measurements `th a le should -then 1)0 MWtiPliOd bY 0.98 to corrict for the aror. if the <br />individual footage marks are not placed correctly and am not oonsistent in their deviatio,4 the <br />instrument stiould be iqlaced. <br />If the water level indicator is constructod of a cable then calibration will be perfomed once per <br />Y:them is at feu ! .. #the conversionY marked directly <br />Water level • ors construacd, of <br />every 6 months and marked with the appropriate convasiom <br />Catibr tion data for each instmment vnUbe.: corded tia-a .binder at the office kr-futurc-. <br />ceA mostmccatcalibr2donxtsuilts will also be recorded in the xecimicians field notes.. <br />erc .is no spocific form for Vater level indicator Calibration. <br />�H cier . <br />1PissOject to #t X -x Y:variationsdue to temp=z=rbuffering cqncityof-the" wr and <br />h! r Y#:.: i drifL, Forthis reasonpHYY :# ## :: : r ! .,.. r # a - Yv <br />ampling on w. <br />!. » 2ndatleastonce wortduring , day. a cahibrale a # mtter ther # it! w! t «.x s !. <br />g is <br />Standardsolutionsam #Y.ow./ fiesh, acwrdmg to packAgikstructiOcil.,•:: eachsampyng,tyclat <br />Standard solutionsor powdasforpH " ! iam cOmmatiAr,. ! These <br /># t #. ! '+ t .rx # . sem! aftar shelfhas «rThr-t <br />k;pvrf Y Y x on the <br />bra�d of standards used, If pte-prepared solution is used, the cxpirzfion daft of d�e _jolutiori Will <br />be noted on the calibration log. <br />Although durs=t brands of PH mets vary, callbrati0a prOccdUrCS are similar for all of them. <br />A gencial&d calibrationrtt are ftIio <br />1. Turn on the instrument, d=k the battery. and allow to warm up if atcessary., <br />234V&49_FO1k23 J 8325 July 14,200 <br />ickr. im- <br />