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Although different brands of conductivity meters vary, calibration procedures are similar for ail <br /> of them. A generalized calibration procedure follows: t <br /> 1: Turn on the instrument, check the battery, and allow to waren up if necessary. <br /> 2. Rinse the conductivity probe and temperature,probe with deionized water then place in <br /> the standard solution. At ForWard Landfill conductivities are usually within Sao <br /> to 1500 <br /> umhos/l,therefore the 1000 urnho&4 solution is appropriate to use, - <br /> 3. Adjust the meter for the appropriate conductivity scale and temperature then read the <br /> conductivity. <br /> 4. If required usc,the "calibrate" adjustment on the meter to correct.the instnunenL to read <br /> the correct conductivity. ' <br /> The calibration process will be,recorded on a conductivity calibration-log: Copies of calibration <br /> logs for each individual-instrument arckcpt in-a:binder.-at-thc•office,- <br /> 711,6 109S'am reviewed- <br /> periodically <br /> eviewedperiodically to assess whether the. instrument is becoming more difficult to calibrate and <br /> therefore needs adjustmenf by the manufactures,or if new probes are-required. <br /> Tttrbidity Meter - <br /> Turbidity measurement is subject to variations due to instrument drift_ For this reason turbidity <br /> meters must be calibrated before and after sampling on each-day and at.least once more during <br /> the day. ' To calibrate a turbidity .meter-the instrument.reading is adjusted to read correctly for <br /> solutions with a standard turbidity. <br /> Standard turbidity solutions are mixed fresh, according to pa£kage instructions, for each. <br /> sampling event. Standard solutions for turbidity are commercially available. These standards - <br /> are purdmsed finsh and discarded.af 1cr shelf life has expirad, Shelf lives vary dqmding on the <br /> brand of standards used. If pre ed solution is used,the eViration date of the solution will <br /> be noted on the ealt`w on log. <br /> Although different brands of turbidity meters vary, calibration procedures are'similar for all of <br /> them, A gerieraUud calibration procedure follows: <br /> l. Turn on the' ent,check the battery,and allow to warm up if necessary. _- <br /> 1 <br /> E49-FO I N23 t OR325 A-4 July 14,2000 <br /> CoMilk 2000 KkWeldcr,jW <br />