• Always validate the CO
2
concentration after calibration by performing several
measurements.
• It is not possible to calibrate the CO
2
concentration in excess of +/- 2%. If you attempt to
calibrate the concentration more than this as compared with your starting point, the control
panel will display when you press the button and the up/down arrow
simultaneously. This e.g. means that if you have once calibrated the concentration by
+ 0.5%, the maximum CO
2
increase during your next calibration will be + 1.5%. The
maximum CO
2
reduction will then be - 2.5% (2% + 0.5%).
5.6 Incubator O
2
concentration
5.6.1 Changing the O
2
set point
1. In the set point menu, verify that the display shows the O
2
concentration. If this is not the
case, navigate to the O
2
menu item by pressing either the right or the left arrow until
the O
2
concentration is displayed: . (O
2
menu item – the set point is: 5.0).
2. Press and hold the button. The display will now alternate between showing
. (O
2
menu item – the set point is: 5.0) and . (set point menu is active
– the set point is: 5.0). This indicates that you are about to change the O
2
set point.
3. While still holding the button, press the up or the down arrow to increase or
decrease the O
2
set point. Each time you press the up or down arrow once, you will either
increase or decrease the set point by 0.1%.
4. Release the button to save the new setting.
5.6.2 Validating the O
2
concentration
To validate the O
2
concentration, follow the procedure in section 5.5.2.