Eppendorf Galaxy CO2 Sensor - Manual (Page 78)

Equipment options
Galaxy
® 170 R/170 S CO
2
Incubators
English (EN)
78
Abb. 12-6: Hydrophobic filter and holder assembly (exploded view)
Fig. 12-6: Hydrophobic filter and holder assembly (exploded view)
5. Make sure the O-rings (between the cap & filter holder and between the filter holder & oxygen sensor
holder) are undamaged and securely in place.
6. Gently press the filter cap back in.
7. Press fit the filter assembly back onto the oxygen sensor holder.
12.4.9 Troubleshooting the O
2
sensor
If the oxygen sensor fails suddenly, it is very likely that the sensor inlet membrane has become blocked by
condensation. This can be seen on the
DATALOGGER screen as a sudden drop from the programmed value
to nearly zero.
To dry the membrane:
1. Remove the hydrophobic filter holder assembly (see Fig. 12-4 on p. 76) by unscrewing it
(counter-clockwise).
2. Program the incubator for a temperature of at least 37 °C (or higher if you normally operate the
incubator at a higher temperature).
3. Close the door and allow the temperature to recover.
1 Oxygen sensor holder
2 Hydrophobic filter disc
3 Hydrophobic filter holder
4 Hydrophobic filter cap
5 Oxygen sensor
1
5 4
2 3