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t Although different brands of conductivity meters vary, calibration procedures are similar for <br /> of them. A generalized calibration procedure follows: <br /> all <br /> i <br /> 1: Turn on the instrument,check the battery,and allow to warm up if necessary. <br /> 2. Rinse the conductivity probe and temperature.probe with deioriized water then place in <br /> the standard solution., At Forward Landfill conductivities are usually within 500 to 1500 <br /> umhosll,therefore the 1000 umhos/I solution is appropriate to use. <br /> 3. Adjust the-meter for the appropriate conductivity scale and temperature then read th <br /> conductivity. <br /> 4. If required use.the "calibrate" adjustment on the meter to correct.the instn=enL to read <br /> the correct conductivity. <br /> The calibration process will be.recorded on a conductivity calibration-log:.Copies of Galz`bzation . <br /> logs for each individual•iustrument are-kept in-a:binder.-at•thr of$ee; ?bc logs-asp reviewed <br /> periodically to assess whether the.insaumeut is becoming more difficult to catr-brate and <br /> therefore needs adjustment by the manufacturer,or if neer probes are-required. <br /> Turbidity Metef _ <br /> Turbidity measurement is subject to variations due to .instrument drift. For this reason turbidity <br /> meters must be caliibzated before and after sampling on each-&y and at.least once more duffing ; <br /> the day. To calt'brate a turbidity meter-the instrument-reading is dusted to read correctly for - <br /> solutions with a standard turbidity. - <br /> Standard turbidity solutions arc mixed fresh, according to package instructions, for 'each. <br /> samp&8 eve- Standard solutions for turbidity are commercially available. These standards - <br /> are purchased fresh and discarded.after shelf life has=pined. Shelf lives vary depending on the <br /> brand of standards used. If pre jmpared solution is used,t& expiration date of the solution Will <br /> be noted on the calt'bration jog. <br /> Although different brands of turbidity meters vary, calibration procedures arc"similar foralI of <br /> them. A generalized calibration procedure follows: <br /> l. Turn on the instrument,check the battery, and allow to warm up if Accessary- <br /> '23 <br /> -493849-POIA23 <br /> ecessary:23-483849-POIA23 IOR3Z A4 <br /> July 14,2400 <br /> 2000 KkkfdA r,tree <br />