Oakton 35631-00 Operating Instructions Manual

Oakton 35631-00 Operating Instructions Manual Manual pdf 22 page image

43428. TroubleshootingProblem Cause SolutionPower on but a) Batteries not in place. a) Check that batteries are inno display place and making goodcontact.b) Batteries not in correct b) Reinsert batteries withpolarity (+ and –). correct polarity.c) Weak batteries. c) Replace batteries.Not responding a) HOLD mode in operation. a) Cancel HOLD mode.to key press b) Damaged key pad. b) Return to dealer.c) Internal program error. c) Reset all internal programsby reinserting batteries.Unstable a) Air bubbles in probe. a) Tap probe to remove bubbles.readings b) Dirty probe. b) Clean the probe andrecalibrate.c) Probe not deep c) Make sure sample entirelyenough in sample. covers the probe sensor(s).d) External noise pickup d) Move or switch offor induction caused by interfering motor.nearby electric motor.e) Broken probe. e) Replace probe. See page 46.“OR” on upper a) Probe is shorted. a) Test probe. Make sure probedisplay is fully connected to meter.b) Probe is in an b) Use different solution.out-of range solution.c) Broken probe. c) Replace probe. See page46.Temperature reading a) Temperature of solution a) Heat or cool solution.erratic or lower is out of rangedisplay reads “OR”Slow response a) Dirty/Oily probe. a) Clean probe. See "ProbeCare & Maintenance",pages 41-42.pH electrode activation (for glass bodied electrodes only)WARNING: Only qualified persons proficient with the safe handling of dangerouschemicals should perform the procedure below. Provide proper containers, fumehoods, ventilation, and waste disposal. Safety goggles and protective clothing mustbe worn while performing this procedure. If possible, replace with another electrodeinstead of performing this reactivation procedure.1. Dip or stir the pH electrode in alcohol for 5 minutes.2. Leave the electrode in tap water for 15 minutes.3. Dip and stir the electrode in concentrate acid (such as HCl or H2SO4) for 5 minutes.4. Repeat step 2.5. Dip and stir in strong base (NaOH) for five minutes.6. Leave for 15 minutes in distilled or deionized water.7. Now test with standard calibration buffer solutions to see if the electrode yieldsacceptable results. You may repeat step 3 through 6 up to three times for betterresponse. If the response does not improve, then your electrode is no longerfunctioning. Replace with a new electrode—call your OAKTON Distributor for moreinformation.Conductivity/TDS probe careKeep the conductivity/TDS probe clean. Rinse the probetwice, and gently swirl it while you take readings. Forbest accuracy, soak a dry probe for at least 5 to 10 min-utes or longer before calibration. Rinse the probe withdeionized or tap water before storing. Never scratch theplatinum portions with a hard substance. Do not strikethe probe against any hard surface.Do not make continuous contact with your solutions.Readings will rise over aperiod of time while you soak your probe.Do not immerse the probe in oily solutions. Clean theelectrode thoroughly by stirring it in a mild detergentbath or isopropyl alcohol. Wipe the probe with a soft tis-sue paper. Rinse thoroughly in tap water and then indeionized water. Recalibrate the meter after cleaning theprobe.The conductivity/TDS probe included with your meterfeatures a removable probe guard to make cleaning easy.To remove probe guard:1. Grip yellow probe guard and twistclockwise. The locking notch will release.2. Slide probe guard off end of probe.lockingnotchtwist probeguardclockwiseto removeProbe modelWD-35608-507.2