Hanna Instruments HI 110 - Manual (Page 12)

12
THREE- (HI 110, HI 111) / FIVE-POINT (HI 112,
HI 113) CALIBRATION
• Immerse the pH electrode and the temperature probe
approximately 4 cm (1½”) into a buffer solution and
stir gently. The temperature probe should be close to
the pH electrode.
• Press CAL. The “CAL” and “
BUF
” tags will appear
and the “7.01” buffer will be displayed on the
secondary LCD.
• 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.
• The calibrated value will be displayed on the primary LCD
and the second expected buffer value on the secondary
LCD.
• 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.
• The calibrated value is then displayed on the primary
LCD and and the third expected buffer value on the
secondary LCD.
• 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.
BUFFER pH
2 BUF
pH CAL
BUFFER pH
1
BUF
pH CAL