Forma Scientific 3546 - 3.14 Connecting the Optional Gas Guard

Forma Scientific, Inc.__________________________________________Installation/Start-up
3-12
Figure 3-5
Rear view of control panel,
Using the gas guard
1
3.14 Connecting the Optional Gas
Guard (Refer to Figure 3-5)
a. Connecting the Outlet of the Gas
Guard to the Incubator's Gas Inlet
Before connecting the gas supply tanks,
connect a piece of supply tubing between the
outlet fitting and the gas inlet on the back of
the incubator. The gas outlet is located
between Tank 1 and Tank 2 inlet fittings.
Check the connections for leaks.
b. Connecting The CO
2
Supply Tanks
Note: Output pressure from the tanks
must be regulated with a dual stage
pressure gauge set at 15 PSIG. Liquid
substances must be supplied in tanks
without siphon tubes to ensure that only
gas enters the incubator.
The high pressure gauge should have an
indicating range of 0 to 2000 PSIG to
monitor tank pressure. The low pressure
gauge should have an indicating range of 0
to 30 PSIG to monitor actual input pressure
to the incubator injection system. A suitable
two-stage pressure regulator is available
from Forma Scientific, Inc., Stock #965010.
Supply pressure lower than 13.5 PSIG
will cause improper operation of the gas
guard and may cause nuisance alarms.
Pressure higher than 15 PSI will damage the
CO
2
control system.
Securely attach the gas lines from the
supply tank to the barbed fittings located on
the back of the unit. The fittings are labeled.
Check the connections for leaks.