MIRI
®
II-12 Multiroom IVF incubators User Manual Rev. 4.0
72
local distributor for further guidance.
36.4 CO
2
gas pressure check
The MIRI
®
II-12 multiroom IVF incubator requires a pressure of 0.4 – 0.6 bar on the input
CO
2
gas line. This gas pressure must be held stable at any time.
For safety reasons, this unit has a built-in digital gas pressure sensor control that monitors
the incoming gas pressure and alerts the user if any drop is detected.
It is recommended to check the CO
2
gas pressure in the menu by inspecting the value for an
item called ‘CO2 P’ (CO
2
pressure).
PASS
: The value must be 0.4 – 0.6 bar.
Please refer to the “16.1 CO
2
gas pressure” section for more information.
36.5 N
2
gas pressure check
The MIRI
®
II-12 multiroom IVF incubator requires a pressure of 0.4 – 0.6 bar on the input
N
2
gas line. This gas pressure must be held stable at any time.
For safety reasons, this unit has a built-in digital gas pressure sensor control that monitors
the incoming gas pressure and alerts the user if any drop is detected.
It is recommended to check the N
2
gas pressure in the menu by inspecting the value for an
item called ‘N2 P’ (N
2
pressure).
PASS
: The value must be 0.4 – 0.6 bar.
Please refer to the “16.2 N
2
gas pressure” section for more information.
36.6 pH check
Validating the pH of the culture media should be a standard procedure. It can never be
accurately predicted what will be the media pH at a certain CO
2
level.
CO
2
is pressure-dependent and thus, at different altitudes, higher concentrations of CO
2
are
needed to maintain the same pH. Even changes in barometric pressure under standard
weather systems will affect CO
2
levels.
The MIRI
®
II-12 multiroom IVF incubator is equipped with a high-grade pH measuring
system.
