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�.A •t Although different brands of conductivity meters vary, calibration procedures are similar for of them. A genet alizcd calibration procedure follows: �' i l: Turn on the instrument,check the battery,and allow to warmup if necessary. 2- the conductivity probe and temperature probe with deiouized water then place in the standard solution. At Forward Landfill conductivities are usually within 500 to 1500 urnhoA thercfott the 1000 umhosll solution is appropriate to use. 3. Adjust the meter for the appropriate conductivity scale and temperature .then read the conductivity. 4_ If required use the "calibrate" ad}ustmerit on the meter to correct.the instrument to read , the correct conductivity. The calibration process will be.recorded on a conductivity c:alibmtion jog_-Copies of cati'bratiou- . logs for each individual ent arc-kept in-a:binder:-atKkte of$ce; Tlie logs-are reviewed periodically tca assess whether the.instrument is becon&g mord dmcult to catt'ba to and therefore needs 4ustment by the manafactum.or ifnew probes are required, Tetrbedaty Mctcr _ - Turbidl-V measurement is subject to variations due to instrument drift For this reason turbidity meters mast be calibrated before and after sampling on each-day and at.least once more deicing the day. ' To calibrate a turbidity meter the insumnent-reading is adjusted to road caarrcctly for - solutions with a standard turbidity. - Standard turbidity solutions are mixed fresh„ according to paskagc instr ions for each- ling event. Standard solutions for turbidity are commercially available. These standards = ara P fresh and ed-a.#tcr shelflifc has cacp'ged, Shelf lives vary depending on the of standards used. If pre red solution is used,the elcphgon date of the solution Will be noted on the caMration log. Although diflerent brands of turbidity meters vary, calibration procedures arc-similar forall of thtin. A generalized calibrationprocedure follows: 1. Turn on the bstrumen4 check the battery,and allow to warm up ifna:essary: _ 1 E49401123IOR32S A4 CorITIJU2oao My 14,2040 .