Oakton 35632-Series Operating Instructions Manual

Oakton 35632-Series Operating Instructions Manual Manual pdf 6 page image

1110For directions on how to calibrate your meter:• See sections 4.2-4.3 on pages 11-13 for pH calibration• See section 4.4-4.5 on page 14-16 for % saturation calibration• See section 4.4 and 4.6 on page 14, 17-18 for mg/l (ppm) calibration• See section 4.7 on pages 19 for Temperature CalibrationPreparing the Meter for pH CalibrationBefore starting pH calibration, make sure you are in the correct measurement mode.When you switch on the meter, the meter starts up in the units last used. Forexample, if you shut the meter off in "pH" units, the meter will read "pH" unitswhen you switch the meter on.Do not reuse pH calibration solutions after calibration. Contaminants in the solutioncan affect the calibration, and eventually the accuracy of the measurements. Seepages 64-65 for information on our high-quality pH calibration solutions.Be sure to remove the protective rubber cap from the pH electrode beforecalibration or measurement. If the electrode has been stored dry, wet the probe intap water for 10 minutes before calibrating or taking readings to saturate the pHelectrode surface and minimize drift.Wash your probe in deionized water after use, and store in electrode storagesolution. If storage solution is not available, use pH 4.0 or 7.0 buffer.The pH/DO 300 meter is capable of up to 5-point pH calibration at pH 1.68, 4.01, 7.00,10.01, and 12.45 to ensure accuracy across the entire pH range of the meter . The meterautomatically recognizes and calibrates to these standard buffer values, which makespH calibration faster and easier.To calibrate at 5 points you must select a 5-pt calibration in SETUP mode program P3.2on page 36. You can select 2, 3, 4 or 5 calibration points for pH calibration.4. CalibrationImportant Information on Meter CalibrationWhen you recalibrate your meter, old calibration points are replaced on a“point by point” basis in pH and completely for % saturation and mg/l (ppm).For example:• pH: if you previously calibrated your meter at pH 4.01, 7.00, and 10.01, and yourecalibrate at pH 7.00, the meter retains the old calibration data at pH 4.01 andpH 10.01.• % saturation and mg/l (ppm): All new calibrations automatically override existingcalibration data.To view current calibration points:• pH: Program P1.0 in the SETUP section, page 32.• % saturation: Program P3.0 in the SETUP section, page 41.• mg/l (ppm): Program P2.0 in the SETUP section, page 49.To completely recalibrate your meter, or when you use replacement probes,it is best to clear old calibration data by resetting the meter.To reset the meter to its factory defaults:• pH: Program P4.0 in the SETUP section, page 38.• % saturation: Program P7.0 in the SETUP section, page 46.• mg/l (ppm): Program P6.0 in the SETUP section, page 55.NOTE: Resetting the meter will set meter to factory defaults.pH, % saturation and mg/l (ppm) must be reset separately.4.24.1