Trace2O HydroCheck HC1000, Instruction Manual

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5.3 Multi-Point Calibration:
5.3.1 Make sure that you have selected between 2 and to 5 point calibration in the setup menu.
5.3.2 Repeat steps 5.2.2 to 5.2.5 above. When the first calibration point is completed, the
display will
show “CAL2”. The meter prompts to continue with second calibration point.
5.3.3 Rinse the pH electrode with distilled water. Dip the electrode into the next buffer solution
(e.g., pH4.01). The meter automatically senses the current calibration solution and begins
calibrating.
“Calibration” indicator begins flashing.
5.3.4 Wait for the measured value to stabilise;
the display shows “CAL3”. The meter prompts to
continue with third calibration point.
5.3.5 Repeat the steps from 5.3.3
until the display shows “END”. Once calibration is complete,
the meter returns to measurement mode automatically.
5.4 pH Calibration with User-Defined Buffers:
5.4.1 Ensure that the
“USER” option is selected in the setup menu.
N.B. Custom buffer solution values should be at least 1 pH unit apart.
5.4.2 Rinse the pH electrode with distilled water. Immerse the electrode in the custom buffer
solution. Stir the solution gently. The meter shows the current measured value.
5.4.3 Press
▲ or ▼ key to increase or decrease displayed value according to the value of the
custom buffer, and
press ENTER key to confirm. “Calibration” indicator begins flashing.
5.4.4 Wait for the mea
sured value to stabilize, the display shows “CAL2”. The meter prompts to
continue with second calibration point.
5.4.5 Rinse the pH electrode with distilled water. Immerse the electrode in the next custom
buffer solution.