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• After the second calibration point is accepted, immerse the pH electrode and the tempera-
ture probe approximately 4 cm (1½”) into the third buffer solution and stir gently. The
temperature probe should be close to the pH electrode.
• If necessary, press the UP and DOWN arrow keys to select a different buffer value.
• The “WAIT” tag will blink on the LCD until the reading is stable.
• When the reading is stable and close to the selected buffer, the “READY” and “ACCEPT” tags
will blink on the LCD.
• Press the GLP/ACCEPT key to confirm calibration.
• The instrument stores the calibration values and returns to normal measurement mode.
Notes
Notes
Notes
Notes
Notes:
•The instrument automatically skips the buffers already used for the previous calibration points
to avoid erroneous procedure.
•If the value measured by the instrument is not close to the selected buffer, “WRONG BUFFER”
and “WRONG PROBE” messages will blink alternately. In this case, check if the correct buffer
has been used or regenerate the electrode by following the Cleaning Procedure (see page
33). If necessary, change the buffer or the electrode.
•If “WRONG BUFFER” and “Old” messages on the secondary LCD are displayed blinking, an
inconsistency between new and previous (old) calibration is detected. Clear calibration
parameters by pressing the LOG/CLR key and proceed with calibration from the current
calibration point (the instrument will keep all confirmed values during current calibration).
•The “WRONG BUFFER” message and the temperature value blink if temperature reading is
out of the defined temperature range for the buffer. Calibration cannot be confirmed in this
situation.
•Press the RANGE key to display the temperature reading during calibration.
•To clear a previous calibration and return to the default values, press the LOG/CLR key at any
time after entering calibration mode. The LCD will show “CLr CAL” for one second, and then
the meter will return to normal measurement mode.
