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r wr •L <br /> t Although different brands of coaductivity meters vary, calibration procedures are similar for aI, <br /> of them. A generalized calibration procedure follows: } <br /> 1: Turn on the instrument,check the battery,and allow to warm up if nee. <br /> 2- the conductivity probe and temperature probe with deio ' d water then place <br /> in <br /> the standard solution. At ForNard Landfill conductivides are usually within 500 to 1500 <br /> utnha3/1,the=fbre the 1000 umhos/l solution is appropriate to use, <br /> 3. Adjust the-meter for the appropriate conductivity scale and temperate then read the <br /> conductivity_ <br /> 4. If required use.the "calibrate" adjustment on the meter to.correct the instrument to read <br /> the correct conducxiviry. <br /> The calibm. ion process will be.rccorded on a conductivity c:alr-bxation log.-Copies of calibration'" <br /> logs for each individual-" eut4 arc-kept in•a:binder:-at-thr-offcc; The lossarcreviewed <br /> PeziOdical].Y to assess whether the.instrument is becoming more difficult to catt'brate and <br /> thercfore needs adjustment by the manufactctrer,or if new probes are-requirecL <br /> Turbidity Metcr <br /> Turbidity measurement is subject to variations due to instrument drift. For this zeason turbidity <br /> must be calibrated before and after sampling on each'day and at.lFast Dace more during <br /> the dAY. • To calibrate a turbidity metcr-the instnunent.reading is adjusted to read correctly for <br /> solutions with a standard tutUdity. <br /> Standard turbidity solutions arc mixed according to Package instructions, for each. <br /> saulpling event. Standard solutions for Uirbidity arc commmemUy available_ These stindards <br /> an purchased fi=h and dis life bas expired, Shelf lives vary ' g on the <br /> brand of standards use& If prcIrepared solution is used,dit acgiration date of the solution will <br /> be noted on the calibration log. _ <br /> Although different brands of turbidity meters vary, calibration procedures an,similar for all of <br /> them_ A generalized calibration procedure follows: <br /> f. Turn on the instrument,check the battery,and allow to warm up if aecessary: <br /> _ $49-FOM3 I OR325 A-4 My 14,2000 <br /> 2000 ,tic, <br />