Pressure Control - Infors HT Labfors 5 Operating Manual

4.10 Pressure Control

22 January 2019
For details about technical data, use and maintenance of the pCO2
sensor and transmitter, refer to the separate documentation from
the manufacturer METTLER TOLEDO.
Mounting of the sensor
pCO2 sensors are mounted into a 12 mm / Pg13.5 port in the ves-
sel top plate by the means of an electrode holder. An additional
adapter is necessary for mounting the sensor into a 19 mm port.
For details about the electrode holder see chapter "Accessories",
"Electrode Holder".
The standard equipment is built for pressure-free operation. It is
mandatory to have a pressure control installed, if a cultivation pro-
cess under pressure is foreseen.
WARNING
Overpressure in the glass vessel may cause the vessel to burst
or break. Any build-up of pressure must be avoided without the
pressure control option!
Pressure control consists of a solenoid valve (proportional valve)
and a piezo-resistive pressure sensor with fixed O-ring (the O-ring
is not visible in the picture to the left).
Depending on the equipment configuration, the solenoid valve is
situated next to or below the gassing unit on the right side of the
equipment.
CAUTION
Risk of slight burns when touching the hot solenoid valve!
The solenoid valve heats up when under electric voltage, which
is the case as soon as the equipment is switched on.
The pressure hose for connection to the exit gas filter during oper-
ation i.e. cultivation is installed when the equipment is stalled.
Pressure control is set and activated in the touch screen software
in parameter Pressure. Control is possible up to 400 mbar.
Labfors 5 – Version for Microorganisms
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