15
TUBE-C
GF-REGULATOR
FL
OW
D
IR
EC
TI
ON
FL
OW
D
IR
EC
TI
ON
Humidifier
Not Supplied
Premixed Gas
TUBE-A
Figure 13. UNO-T-H-PREMIXED - Gas connection.
Tip
►
Make sure to push the tubes all the way into the connectors thus avoiding any gas leak.
The GF-REGULATOR provides an easy output gas flow rate regulation in the range 0.17
–
0.41 l/min,
thanks to its calibrated orifice. Regulate the pressure of the GF-REGULATOR to obtain the desired gas flow rate.
Table 1 shows the relation between pressure and the gas flow rate for the GF Regulator.
Pressure
[barg]
Gas Flow Rate
[l/min]
0.2
0.17
0.4
0.22
0.6
0.27
0.8
0.32
1.0
0.37
1.2
0.41
Table 1. GF-REGULATOR- Pressure vs Gas Flow Rate.
Tip
►
If the desired gas flow rate is 0.27 l/min, the pressure of the GF-REGULATOR has to be set at 0.6 barg
(8.7 psig).
Tip
►
Okolab suggests setting the gas flow rate in the range 0.3
–
0.4 l/min. If the total control volume is
Figure 14 shows how to use the GF-REGULATOR correctly:
A.
Pull the knob up to release the lock.
B.
Rotate the knob until the pressure reaches the desired value (clockwise/counterclockwise to
increase/decrease the pressure).
C.
Push the knob down to lock it.
