Oakton pH 5+ Instruction Manual

Also see for Ion 6+: Instruction manual Instruction manual

Contents

Oakton pH 5+ Instruction Manual Manual pdf 19 page image

Instruction Manual pH 5+, pH 6+, Ion 6+5. TROUBLESHOOTINGProblem Cause SolutionNo display Batteries absent orinstalled incorrectly Insert batteries using correct polarity“LO” Low battery Replace batteries.“ - - - ” ondisplay Ion 6+ requires calibration Perform either 2 or 3 point ion calibrationUnstablereadinga) Dry electrodeb) Dirty electrodec) Temperature changinga) Hydrate / soak pH electrodeb) Clean electrodec) Allow time for electrodes and solution to stabilizeNot able tocalibratea) Display freezesb) Faulty electrodec) Inaccurate buffera) Release reading by pressing .b) Replace electrode.c) Use fresh buffer solutions mV out of range Check the probe/ solution Buffer value is out oftoleranceUse new calibration solution & recalibrate. Ensurecorrect pH buffer group was selected. Ion calibration exited after1 point calibrationPerform at least 2 point ion calibration beforeexiting. (Ion 6+) ISE slope not within thespecified toleranceRe-calibrate. Check Ion Selective Electrode & referto ISE manual (Ion 6+) Ion calibration points arenot 1 decade apartPerform calibration with consecutive values. Forexample, use 1, 10, & 100 , not 1 & 100 (Ion 6+)Upon exit of calibrationmode, a 1-pointcalibration was attemptedwith a pH buffer otherthan 7.00 or 6.86.Repeat pH calibration using one or more pointswhich include either 7.00 (USA) or 6.86 (NIST)standards. Over range: readingexceeds maximum value Under range: readingexceeds minimum valueEnsure that the value being measured is within therange of the selected mode. Confirm thatelectrode(s) are connected and working properly.16