HND-R106
HND-R106 K09/0422
page 15
9.5.2
How to carry out calibration
Please note: the calibration can only carried out at a temperature range of 0
- 60°C !
If you have not yet done so set device to measuring mode ’pH’. Make sure that
either the 1-, 2- or 3- point calibration (whichever is required) and desired buffer
series (PHL, GPH, dIn or Edit) the has been activated (further information in
chapter 7 „Configuration“).
Carefully remove electrode safety cap (Attention! Contains 3 mol KCl!).
Rinse electrode with distilled water and dry it carefully.
How to start calibration: press
key for 2 seconds.
The display will prompt you to measure the first calibration solution. You can
abort calibration at any time by pressing
key. In such a case the last
calibration before this one remains valid.
1. Calibration point 1: ‘Pt. 1’
Place electrode and temperature probe (if any) in the neutral
solution stirring gently.
(For 1-point calibration: solutions with arbitrary pH value (e.g. pH
4) can be used)
As soon as the measured pH value got stable the next calibration
step will be displayed.
*1)
No temperature sensor: manual input of temperature of buffer 1
Use
or
to enter the temperature of the buffer solution.
Use
to confirm the value; the next calibration step is
displayed.
If 1-point calibration is chosen the calibration is already done at
this point, the bar graph display on the left shows the electrode’s state rating.
2. Rinse electrode in distilled or deionized water, dry electrode
3. Calibration point 2: ‘Pt. 2’ (only for 2- or 3- point calibration)
Place electrode and temperature probe (if any) in the second
buffer solution (e.g. for standard series this is: pH 4.0 or pH 10.0)
and stir gently.
As soon as the measured pH value got stable the next calibration
step will be displayed.
*1)
