ARCHIVED REPORTS_2009_13 - Laserfiche WebLink

Home Browse Search

2- Rinse the pH probe and dempera probe-with dcionized water thenlace in solution. P the pH 7 3. Adjust the meter for the appropriate tem rature then read the pH. 4. If required use the "calibrate" adjWtment on the meter to correct the went to read PH 7- S. Rinse the pH and-temperature probes with deionized .water and place in the pH IO solution (note: at Forward landfill groundwArer pH is usually above 7 therefore it is appropriate to use the Ph 10 standarcL If the PH is below 7 then the pH 4 standard should be used) 6. Use the "slope"adjustment to correct the meter to properly read pH 10. 7. P epeat steps 2 to 6 until the meter reads pli.7 and I0 as closely as possible. The calibration process will be recorded on a pH calibration log, Copies of calibration logs for e akh Individual Instrument are kept in a binderAt the office The logs are reviewed periodically to assess whether the int=ent is.becoming more difficult to calibrate and therefore needs - adjustment by the mmufactnrar,.or ifnew probes are re Conduciiviy Meter Conductivity measbrement is subject to vmiations due to z=pw&u=and k truntent drift. por d2is reason conductivity,meters must be calx ore and after sampling on each day and at least once more during the day_ To calibrate a WnductivkY meter the went reading is to read correctly for solutions with a standard conductivity. Standard c onductivity solutions arc mixed fmh, according to package instructions, for each sanqding$ e v<nt, Standard solutions for conduopdvity of 104, 1404, or 1.0,000 umhostliter,arc 4MnInenciaIty available. These standaazds-are purchased A=h and discarded afire shelf life has sxpircd. Shelf.lives vary depending on the brand of standards used: If pre�n,�ared.solution is used,-the expiration date of the solution will be noted on the cah*br4on log. - .0 23-M349-RIM IOR325 A-3 CQP!'�kM 2M K1e a.toe. b*I4,Z400