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t Although different brands of conductivity meters vary, calibrationmeedures are s' <br /> p filar for <br /> of them- A generalized calibradon procedure follows.- <br /> Turn <br /> ollows:Turn on the instrument,check the battery,and allow to warm up if necessary. <br /> 2, Rinse the conductivity probe and temperature probe with deianlzed <br /> water then pace in <br /> the standard solution. At Forward Landfill'conductivities are usually within ,dap to 1.5()o <br /> umhos/i,therefore the 1000 umbosa 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 use.the "calibrate" adjustment on the meter to correct,the instrument to read <br /> the correct conductivity. <br /> The ealibM. 'On process will be.recorded on a conductivity calibraton log. Copies of calibration. . <br /> logs for each individual-instrument arc-kept in-a:binder.-atrthr.off&ce; The logs—Are reviewed <br /> periodically to assess whether the•instrument is becoming mare difficult to c&-br Ite and <br /> therefarc meds adjustment by the manuficturer,or if new probes an-required, <br /> Turbidily Mster <br /> Turbidity rneasurexnent is subject to variations due to insmiment drift. For this reason turbidity` <br /> meters must be calr'bmted beforc and after sampling on each'day and at-least awe more during <br /> the may. To c ah'br-ate a an-bidity metcr-the irLsaument.reading is adjusted to read convotly for <br /> solutions wfth a turUdity. = <br /> Standard turbidity solutions are mixed fiesh, according to padcige moons, for each. <br /> want. Standard solutions for turbidity are commercially available. These stinditrds <br /> arc aced fiwh and discarded altar shelf life has=Pirc(L Shelf lives vary depending,on the <br /> bCand of sbadards used. If Fn solution is used, the expiration,date of the solution will <br /> be noted on the calibration log. <br /> Although different brands of turbidity meters vary, calibration procedures are•similar for all of <br /> them. A generalized cifbration procedure follows: <br /> 1. Turn on the instrument,check the battery,and allow to warm up if _- <br /> 849-Fot%23 tol3zs A4 <br /> 2004eIn, hdyy 14,2WO <br />