Heracell 150i/240i 50115191_C_01-2018 155 Thermo Scientific
Chapter 10 Maintenance
Measurement example:
•CO
2
set value: 5 %
Reference temperature: 5.6 %
1. Press the CO
2
DISPLAY key [1].
The CO
2
menu is displayed.
2. To exit the CO
2
menu:
Press the END key [3].
3. To enter the Calibration submenu:
Press the CALIBRATION key [2].
4. To enter the measured value (targeting value):
The targeting value can be increased or reduced in increments; if you keep the + key [4] or the
– key [6] 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 [6].
To reduce the set value:
Press the – key [4].
5. To accept and store the targeting value:
Press the ENTER key [5].
The system returns to the main menu. The temperature display shows the current actual
value measured in the CO
2
display.
10.9. Replacing the gas inlet filter
The gas inlet filter (CO
2
-/O
2
-/N
2
supply) has plastic threads and is screwed by hand into the
threaded hole at the control box.
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.