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2. Rinse the pH probe and ternpewure probe with drionized water then place in theH 7 <br /> solution, p <br /> 3• Adjust the meta for the appropriate t=P=t=thea read the pH. <br /> 4. If required use the "calibrate" adjustment on the meter to correct the instnunent to read <br /> pH 7_ , <br /> S. a the pH and.temg deio ' .water and place in the pH 10 <br /> solution (note: at Forward water pH is usualfy above 7 therefore it is• <br /> appropriate to use the Ph 10 the PH is below 7 thea the pH 4 standard should <br /> be used) <br /> 6. Use the "slope"adjustment to correct the meter to properly read pFi 10. <br /> 7. Repeat steps 2 to 6 until the meter reads plil and 10 w closely as possible. <br /> Mie calibrazion process vnill be recorded on a PH calibration log. Copies ofcabibration logs for <br /> eath ladividuW.kmtrment arc kept in a b' eat Oic,affim The Togs axe <br /> reviewed periodically <br /> ._; <br /> to assess whether the ' eat.is bec=w9nnom diffieult to calibrate and thcrefom-needs - <br /> adjustment by the manufacturcr,yr if new probes are re <br /> Conduc-tivity MeCOnduter <br /> ctivi Y measurement is subject to variations due to tanpazb==<I ' eat drill. For <br /> this reason conductivity mete=.must be cah-brated before and after sampprIng on each day and at <br /> lc= once more during the day_ To caliluate a coliductiVitY Metcr the _ ent reading is <br /> to read c==dy for sohtd=with a standsed <br /> con ' 'ty <br /> Standard condudiviq soMons 81'Cnibmd fiesh, to e 1II5ttuChoaS, for each <br /> sampling event Standard soluxions for conduptivity -of 100, JOW. or 1.0, are <br /> y.availAble. These standards are 13=hased Awh and discardea dter shelf life has <br /> Shelf Uvts vary dopending on the brand o 1fpre-prepared.solution is <br /> the expiration date of the solution will be noted on the cafibration log. <br /> 849-Fo1123 toR32$ July 14,2400 <br /> zM KkWckkr,roe, <br />