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tAlthough different brands of conductivity meters VRIY, calibration procedures axe similarfor 41 , <br /> ofthem. A generalized calibration priocedure follows: <br /> l: <br /> 'rum.on the instrment,check the battery,and allow to warm up if aec- <br /> zary- <br /> 2• Rinse the coriductivity probe and temperature probe with dcio ized water then <br /> place in <br /> the standard solution. At Forward Landf4conductivides are OU <br /> usually within S to 1500 <br /> umhOA therefore the 1000 os/1 solution is appropriate to use. - <br /> 3_ Adjust the•inter for the appropriate conductivity scale and temperature then read the <br /> conductivity. <br /> 4_ If required use,the "calibrate" adjustmtezit on the meter to correct-the u?stzumeni to zeal <br /> the correct conductivity. <br /> The calibration process will be xecorded on a conductivity calf-bration log: Copies of caLbxation~ <br /> Iogs for individual•" ent are-kept in-a: er-at•thewoffice: Tho logs <br /> reviewed <br /> "odically to whether the.instrument is becoming more difficult to calibrate and <br /> th ore needs adjustment by the manuf actum,or if new probes are-requirecL <br /> ktidity Meter <br /> Turbidity measurement is subject to variations due to iastrument drift- For this zeason turbidity <br /> meters must be calx ora and after sampling on each-day and at.least once more during <br /> the day. - To cah'bme a turbidity mctcr•the insaument reading is adjusted to read caaectiy for - <br /> solutions witb a standard turijidity. - <br /> Standard turbidity solutions are mixed a=,ording to paelcige " <br /> 'ons, for 'each. <br /> -sampling event Standard solutions for turbidity are comma=aUy available, 11=0standards - <br /> gre purchased fiesh and discarded.af la shelf life has cx,p4vd. Shelf lives vary depending on the <br /> bmd of standards used. If prejxqmed solution is us4 the expiration date of the solution wf <br /> be noted on the 'on log. <br /> Although different brands of turbidity meters vary, calibratiou procedures arc-Similar for all of <br /> thelm A gereralized calz°bration Procedure follows; <br /> 2. <br /> Turn on the' ent,check the battezy,and allow to warm up if ncressary: _ <br /> E49- OM314R32S A4 <br /> My 14,2000 <br />