Thermo Scientific HERACELL VIOS 160i, User Manual

Page: 149 / 200

9
Maintenance
Replacing the HEPA-filter
Thermo Scientific
HERA
CELL VIOS
160i
/
250i
9-7
Figure 9-5. CO
2
calibration procedure
4. Enter the measured value (target value):
The targeting value can be increased or reduced in increments; if you keep the + key or the – key
depressed, the function switches to a rapid increase/reduction; after approx. 3 seconds, another
increase/reduction occurs.
To increase the targeting value:
• Press the + key.
To reduce the set value:
• Press the - key.
5. Accept and save the target value:
• Press the
Enter
key.
• Press the
Save
key.
• The system returns to the main menu. The CO
2
display shows the actual value currently measured
in the workspace.
Replacing the HEPA-filter
The HEPA-filter is mounted under a plastic airbox at the bottom of the rear wall in the workspace.
Steps for replacing the HEPA-filter:
1. Power down the unit, shut off the gas supply and allow the workspace to vent.
2. Take the center and bottom insert out of the workspace.
Note
Excessive CO
2
content:
Excessive CO
2
content after the calibration can be reduced by leaving the device doors open for
approx. 30 seconds.
Value reset:
If the value isn’t changed within the next 30 seconds, the system automatically exits the menu, and
the most recently confirmed value is preserved.