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25
CALIBRA
TION
If necessary, press the / keys to select a different buffer value.
The “ ” tag is displayed blinking until the reading has stabilized. When the reading is stable
and within range of the selected buffer, the
CFM
functional key is displayed.
7. Press
CFM
to confirm the calibration point. The instrument displays the calibrated value and the
fourth expected buffer.
8. After the third calibration point is confirmed, immerse the pH electrode and the temperature
probe approximately 4 cm (1½”) into the fourth buffer solution and stir gently.
If necessary, press the / keys to select a different buffer value.
The “ ” tag is displayed blinking until the reading has stabilized. When the reading is stable
and within range of the selected buffer, the
CFM
functional key is displayed.
9. Press
CFM
to confirm the calibration point. The instrument displays the calibrated value and the
fifth expected buffer.
10. After the fourth calibration point is confirmed, immerse the pH electrode and the temperature
probe approximately 4 cm (1½”) into the fifth buffer solution and stir gently.