Instruction Manual

10
 The   tag will blink on the LCD until the reading is
stable.
 When the reading is stable and close to the selected buffer, the
READY tag will be displayed and the CFM tag will blink.
 Press CFM to confirm calibration.
 The calibrated value will be displayed on the primary LCD
and the second expected buffer value on the secondary
LCD.
 Press CAL to quit calibration. The instrument will return
to measurement mode and will memorize the one-point
calibration data.
TWO-POINT CALIBRATION
Any two of the 7 memorized buffers can be used for this purpose. However, it
is recommended that pH 6.86 or 7.01 to be chosen as first calibration point
and pH 4.01 (acidic) or pH 9.18/10.01 (alkaline) as second calibration point.
 Proceed as described in One-point calibration section, but do not quit
calibration by pressing CAL at the end.
 After the first calibration point is confirmed, immerse the pH electrode and
the temperature probe approximately 4 cm (1½) into the second buffer
solution and stir gently. The temperature probe should be close to the pH
electrode.
 If necessary, press the ARROW keys to select a different buffer value.
 The   tag will blink on the LCD until the reading is
stable.
 When the reading is stable and close to the selected buffer, the
READY tag will be displayed and the CFM tag will blink.
 Press CFM to confirm calibration.
 Press CAL to quit calibration. The instrument will return
to measurement mode and will memorize the one-point
calibration data.
THREE TO FIVE-POINT CALIBRATION
Any of the unused buffers in previous calibration can be used for this purpose.
 Proceed as described in Two-point calibration section, but do not quit
calibration by pressing CAL at the end.
 After the second calibration point is confirmed, immerse the pH electrode
and the temperature probe approximately 4 cm (1½) into the next
buffer solution and stir gently. The temperature probe should be close to
the pH electrode.
CAL
BUF
pH
BUFFER pH