16
FOUR, THREE, TWO or ONE POINT CALIBRATION
• Proceed as described in “FIVE POINT CALIBRATION” section.
• Press
CAL
or
ESC
after the appropriate accepted calibration point. The instruments will return to
measurement mode and will memorize the calibration data.
FIRST POINT MODE
Two
SETUP
options are available to determine how the previous calibration will be affected by a
subsequent one point calibration. These options are replace or offset.
If the
Replace
option is selected, the slopes between current buffer and nearest lower and higher
buffers will be recalculated.
If the
Offset
option is selected, an electrode offset correction is performed keeping unchanged the
existing slopes.
ERROR SCREENS
Wrong buffer
The calibration cannot be confirmed.
The pH reading is not within range of the selected buffer. Select another buffer using the / keys
or change the buffer.
pH CALIBRA
TION
Electrode Dirty/Broken
alternatively with
Buffer Contaminated
The calibration cannot be confirmed.
The offset of the electrode is not in the accepted range. Check if the electrode is broken or clean it
following the Cleaning Procedure (see page 45). Check the quality of the buffer. If necessary, change
the buffer.
