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. .r•L <br /> 'Although different brands of conductivity meters vary, calibration procedures are similar for <br /> a�j' <br /> of them. A generalized calibration procedure follows: i <br /> l: Turn on the instrument,check the battery,and allow to warm up if necessary <br /> 2. Rinse the eotiductivity probe and temperature.probe with d6onized water then place in <br /> the standard solution. At Forward Landfill conductivities are usuallywithin 500 to 1540 <br /> umhosn,therefore the 1000 umhosll solation 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 use.the "calibrate" adjustmezit on the meter to correct.the instrument to read <br /> the correct conductivity. - <br /> The calibration process will be.recorded on a conductivity calIbzation-109: Copies of calibration'- . <br /> logs for each individual-instrument arc-kept in-a:binder-at-the-of cc.- The logs-amreviewed- <br /> periodically <br /> eviewedperiodically to assess whether the.instrument is becoming more difficult to calibrate and <br /> therefore needs adjustment by the manufacturer,or if new probes are-required, <br /> Turbidity Meter <br /> Turbidity measurement is subject to vadaxions 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 dxy. - To calibrate a turbidity meter-the instrument-reading is adjusted to read con-ectly for _ <br /> solutions with a standard turbidity. - <br /> Standard turbidity solutions arc mixed fresh, according to package instructions, for each. - <br /> sampling evenL Standard solutions for turbidity err coruznercially available. These standards <br /> are purchased fresh and discarded.after shelf life has expired. Shelf lives vary depending on the <br /> bread of standards used. if preVrepated solution is used,the expiration date of the solution will <br /> be noted on the calibration log. <br /> Although different breads of turbidity meters vary, calibration procedures are'similar for all of <br /> them- A generalised calibration procedure follows: <br /> 1. Turn on the instrument,check the battery,and allow to warm up if necessary,- <br /> Z3-483949-POM3 IOR323 A4 .1uty 14,2WO <br /> Corr,&2644 Kkkfctda,1W_ <br />