Trace2O HydroCheck HC1000, Instruction Manual

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5.1 pH Calibration
The HC1000 allows up to a 5 point calibration in the pH mode. We recommend performing at
least a 2 point calibration for more accurate measurement. The meter will automatically
recognise and calibrate to following standard buffer values.
USA Standard Buffer Options pH 1.68, 4.01, 7.00, 10.01, 12.45
NIST Standard Buffer Options pH 1.68, 4.01, 6.86, 9.18, 12.45
DIN Standard Buffer Options pH 1.09, 4.65, 6.79, 9.23, 12.75
If you selected the user-defined option in the setup menu, the meter will allow only 2 point
calibration.
Single point calibration should only be carried out with buffers of pH 7.00, 6.86 or 6.79,
otherwise calibration will not be accepted.
Ensure that the meter is calibrated when attaching a new electrode or before first use. DO NOT
use visibly dirty calibration solution; contaminants in solution will affect the calibration and
eventually the accuracy of the measurement.
5.2 Single Point Calibration:
5.2.1 Ensure that 1 point calibration is selected in the setup menu.
5.2.2 Rinse the pH electrode with distilled water.
5.2.3 Ensure the display shows the pH indicator, and press CAL key, the meter shows
“pH7.00/CAL” (or “6.86/CAL”, “6.79/CAL”).
5.2.4
Immerse the pH electrode in the pH7.00 (or 6.86, or 6.79) buffer solution. The tip of
the electrode must be completely submerged in the calibration solution. Stir the solution
gently to ensure homogeneity.
5.2.5
Press ENTER key, “Calibration” indicator begins flashing. Wait for the measured
value to stabilize; the display shows
“END”. The meter returns to measurement mode
automatically.
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