Trace2O AquaSafe WSL25 Plus, Instruction Manual

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pH Calibration:
The HL101 pocket pH/temperature tester allows up to 3 point calibration. We recommend that you
perform at least a 2 point calibration for best accuracy. The unit automatically recognises and calibrates
to the following standard buffer values.
•
USA Standard Buffer Options: pH 4.01, 7.00, 10.01
•
NIST Standard Buffer Options: pH 4.01, 6.86, 9.18
Single point calibration should only be carried out with pH 7.00 or pH 6.86, otherwise the calibration will
not be accepted by the unit.
The unit must be calibrated prior to first use or whenever the electrode is replaced. To ensure optimum
accuracy, regular calibration is recommended. Do not reuse calibration solution after calibration,
contaminants in solution will affect the calibration and eventually the accuracy of the measurement.
SINGLE POINT CALIBRATION:
1.1 Ensure that 1 point calibration is selected in the setup menu.
1.2 Rinse the pH electrode with distilled water. Press CAL key; the unit shows “pH7.00/CAL1” or
“pH6.86/CAL1”.
1.3 Immerse the pH electrode in the pH7.00 buffer solution; the end of the sensor must be completely
submerged in the calibration solution. Stir the solution gently.
1.4 Press ENTER key to confirm. Wait for the measured value to stabilise; the display shows “END”.
Single point calibration is completed.
Cal
Enter