19
Target Gas Percentage
[%]
Gas flow rate values to be set
[l/min]
Air
CO
2
Air
CO
2
Total
95.00
5.00
0.60
0.03
0.63
95.00
5.00
0.80
0.04
0.84
95.00
5.00
1.00
0.05
1.05
Table 2. 2GF-MIXER flow rate regulation for 5% CO2 concentration.
Note
►
If you need, ask Okolab for other Target Gas Percentage values.
Example:
If the target Air percentage is 95.00% and the target CO2 percentage is 5.00%, there are three
possibilities to realize the desired gas percentage (see Table 2).
Note
►
Values reported in Table 2 have been optimized considering the CO2 consumption, condensation
(normally it decreases if the outlet total gas flow rate increases) and medium evaporation (normally it
decreases if the outlet total gas flow rate decreases).
If the desired outlet total gas flow rate is 0.84 l/min, the air flow rate has to be set at 0.80 l/min and the
CO2 flow rate at 0.04 l/min.
3.
Flow rate regulation means turning the knob until the floating-ball is placed in correspondence of the
desired value (see Figure 19). Notice that the correct position of the floating-ball (black sphere in Figure
19) is having its middle point in correspondence of the desired graduate scale value.
Figure 19. 2GF-MIXER - Graduated scales.
Tip
►
If you use a premixed gas tank supply (95% air and 5% CO2), Okolab suggests that the premixed gas
supply should be connected to the “Air in” connector on the rear panel of the 2GF
-MIXER. The air flow rate
should be set at 0.1 l/min. Make sure that the CO2 valve is totally closed.
