Chapter 1 Installation and setup
12
Anoxomat Mark II CTS User’s guide
1.10 Standard gas mixture
The standard gas mixture could have a composition as
specified in the line “Primary gas supply” in Table 2
below, along with the resulting jar mixture using the
standard recipes.
You must use the primary gas connection (gas #1) for
your anaerobic gas mixture cylinder. Normally, the
secondary gas connection (gas #2) is used for the 100%
CO cylinder, and the third gas connection (gas #3) is
used for the H mixture cylinder.
WARNING: Gas mixtures with hydrogen greater
than or equal to 14% is considered flammable.
Gas mixtures with concentrations of oxygen above the
normal 21% atmospheric significantly increases the risk
of ignition and fire. Never use such hazardous gas
mixtures with the Anoxomat.
For other jar composition results, see Additional Gas
Connection section.
Hydrogen gas at 14% is considered flammable, therefore
it is recommended that any gas mixture should not be
purchased above such limit.
High concentrations of oxygen are a potential fire
hazard for operators. It is not recommended to use
Oxygen above 21% atmospheric air.
The Anoxomat processes the recipes independent of
the gases or gas mixtures used.
Gas composition O
2
CO
2
H
2
N
2
Primary gas supply (alternative 1) – 10.0% 10.0% 80.0%
Standard microaerophilic recipe 6.0% 7.1% 7.1% 79.8%
Standard anaerobic recipe 0.0% 10.0% 10.0% 80.0%
Primary gas supply (alternative 2) ˜ 10% 5% 85%
Standard microaerophilic recipe 6.0% 7.1% 3.6% 83.3%
Standard anaerobic recipe 0.0% 10.0% 5.0% 85.0%
Table 1.2: Gas supply mixtures and jar composition results
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