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2. Rinse the pH p . robe and tternpemture probe- with dtionized water then place in the PH 7 <br />Solution. <br />3. Adjust the meter for the appropriate temperature thed read the pH. <br />4. If required use the "calibrate" adjustment on the meter to correct the insth=ent <br />pH 7. to read <br />Rinse the pH and,tempwature probes with deionized.water and place in the . pJ4 '10 <br />solution (note: at FOrwwd LIndMI grotmdv,�Iter PH is USualfY abi've 7 th=-fore it is <br />appropriate to use the Ph 10 swndard_ If the pH is. below 7 then the pH 4 standard. should <br />be usied) <br />6. Use the "slope" adjustment to correct the meter to properly read pH 10. <br />7. Repeat steps 2 to 6 until the meter reads pH.7 and 10 as closely as possible_ <br />The calibration pmccss will be recorded on a pH calibration log, Copies of calibration logs for <br />eakh Individuid.insIrment ire kept in a binderAi th' office The logs are <br />=Viewed peziodically <br />to assess whether the inswment -is becoming -more difficult to r+. •, and therecom.needs. <br />Adjustment by the manufactureror ifnew probes are rieq� <br />Conductivity Meter <br />Condxmdvit drM <br />.y meastirtment is su1ject to varladons due to temperature and figgrument VOT <br />ffiis reason conductNity meters must be ealibr;:ted before and afl�er sarnplmg on each day and at <br />least once more during the day- To calibrate a coMuctivitY meter the hLVn=,=t reading is <br />acVusted to read con=dy far solutious -with a standard conductilfity. <br />Stmdard conduc&Ity solutions -are mixed fi=k according to paclmgc fin=c(or ns, for each <br />samplinnt S=dard solutions for condmovity of 100. 1000, or 1.0,000 urnhdsMter, ar6 <br />Oxnm=,dally available I hese standards purcbased fi=h and discarded aler shelf ffe has <br />CvfiTCL Shelf lives vary de -pending on the brandof s=dards usa if <br />pre -prepared s6lution is <br />a the expiration' date ofthe soludon will bo noted on the calibradon log. <br />2Qoo .tae. <br />My 14,200 <br />