Eppendorf Galaxy CO2 Sensor - Manual (Page 73)

Equipment options
Galaxy ® 170 R/170 S CO
2
Incubators
English (EN)
73
4. After the incubator has been humidified and left overnight to stabilize, select the USER menu; then,
using the or direction key, select OXYGEN SENSOR-REF TO ATMOSPHERE (see Fig. 12-2 on
p. 73) and follow the onscreen instructions to automatically calibrate the oxygen sensor to atmospheric
oxygen levels. The oxygen reading is automatically adjusted to 19.7 %, which is the true reading taking
into account the relative humidity level.
Abb. 12-2: Selecting OXYGEN SENSOR-REF TO ATMOSPHERE
Fig. 12-2: Selecting OXYGEN SENSOR-REF TO ATMOSPHERE
5. Enable the oxygen control: (a) press the USER function key, (b) using the or direction key, select
MANUAL DISABLE (see Fig. 12-3 on p. 73), (c) press the ENTER function key, (d) select ENABLE for
Oxygen Control using the or direction key, then (e) press the ENTER function key.
Abb. 12-3: USER SETTINGS Screen
Fig. 12-3: USER SETTINGS Screen
6. Navigate to the PROG screen to set the required Oxygen level.
7. The Alarm levels are automatically set to ± 0.5 % above or below the programmed value, but you can
modify them in the ALARM screen. Re-arming the alarm can be delayed until the programmed value is
achieved: select the relevant option in the ALARM screen.
If the programmed O
2
level is close to the ambient oxygen, it may be necessary to reduce the
cylinder pressure below 1 bar to stop the oxygen level from undershooting the programmed
value.
Both inner and outer doors must be open.