Hanna-instruments HI 84529-01 Manual do Utilizador descarregar pdf (Página 27)

www.hannainst.com

Operational Guide

bu er value will be automatically selected.

14. After the second calibration point has been con rmed, press ESC to exit

without performing the third calibration point.

3 Point Calibration

1. Remove the electrode holder with

electrode from the top of the beaker.

2. Place the third beaker with

calibration bu er in the beaker

holder. Rinse the electrodes in a

beaker containing the third bu er

rinsing solution.

3. Place the electrode holder (with electrodes) on the top of the beaker

and secure it by turning clockwise and press STIR. If necessary press the

ARROW keys in order to select a di erent bu er value.

4. The (unstable measurement) symbol will be shown on the display until

the reading becomes stable.

5. When the reading is stable and close to the selected bu er, the

(unstable measurement) symbol will disappear and the CONFIRM key

will become active.

6. Press CONFIRM to con rm the calibration. The instrument stores the

calibration value and returns to calibration menu, where the date and

time for the pH calibration will be updated.

Note: A bu er con rmed during the calibration process is removed from

the list of available bu ers. If the value measured by the instrument is

not close to the selected bu er, a “Wrong Bu er” error message will

be shown on the display. Check if the correct bu er has been used or

regenerate the pH electrodes by following the Cleaning Procedure. If

necessary change the bu er or the electrode.

If the measured o set isn’t within the preset limits (±45 mV), the meter will

display the message “Bu er Contaminated” alternatively with ”Electrode

Dirty/Broken”.

Electrode

Calibration

Procedure

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 53 54

Sem comentários

Hanna-instruments HI 84529-01 Manual do Utilizador Página 27