Thermo Scientific Heracell Vios 160i CR, Operating Instructions Manual

Page: 161 / 216

9
Maintenance
Replacing the HEPA Filter in the Workspace
Thermo Scientific
Heracell Vios 160i / 250i CR
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 in the Workspace
The HEPA filter in the workspace is installed under a plastic airbox at the bottom of the workspace,
right before the rear wall.
Steps for replacing the HEPA filter:
1. Power down the unit, shut off the gas supply and allow the workspace to vent.
2. Remove the center and bottom shelves 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.