Hanna Instruments HI 84529-01 - Manual (Page 26)

www. hannainst .com 26 Operational Guide
1 Point Calibration
1.
The 8.30 buff er will be selected by default. If necessary, press the
ARROW keys in order to select a diff erent
buff er value.
2.
The (unstable measurement)
symbol will be shown on the display until
the reading becomes stable.
3.
When the reading is stable and close
to the selected buff er, the (unstable
measurement) symbol will disappear and
the CONFIRM key will become active.
4.
Press CONFIRM to confi rm the
calibration or ESC to exit calibration.
5.
After the calibration point has been
confi rmed, press ESC to exit without
performing the second calibration point.
2 Point Calibration
6. After pressing CONFIRM in step 4 of
1 point calibration procedure of the
calibrated value will be shown on
the display and the second expected
buff er value will be displayed.
7. Remove the electrode holder with
electrodes from the top of the beaker.
8. Place the second beaker with calibration buff er in the beaker holder.
Rinse the electrodes in a beaker containing the second buff er rinsing
solution.
9. Place the electrode holder (with electrodes) on the top of the beaker
and secure it by turning clockwise and press STIR.
10. If necessary, press the ARROW keys in order to select a diff erent buff er
value. The (unstable measurement) symbol will be shown on the
display until the reading becomes stable.
11. When the reading is stable and close to the selected buff er, the (unstable
measurement) symbol will disappear and the Confi rm key will become active.
12. Press CONFIRM to confi rm the calibration.
13. The calibrated value will be shown on the display and the third expected
Electrode
Calibration
Procedure