Kendro HERAcell 150, Operating Instructions Manual

Page: 25 / 251

CO
2
Incubator HERAcell ® 150 Operating Instructions
25
4. Description of the device
4.8 Switchbox with supply interface
All supply connections are installed in the switchbox at the rear
of the device.
Gas connection:
The gas supply line between the device and the gas supply
system is connected using the supplied connecting hoses. Fig.
9 shows the connection of a device with combined CO
2
/O
2
/
N
2
connection. Further optional connections are described in
Section 5.3.
O
2
/N
2
, and CO
2
are supplied to the device through separate
connecting sleeves [1] and [2].
All process gases must be supplied to the device at a fixed
pressure that has been preset within a range of 0.8-1.0 bar and
must remain unchanged.
Befire the gases are fed into the work space, they flow through
a sterile filter with a separation rate of 99.97 % for a particle
size of 0.3 µm (HEPA filter quality).
Gas guard:
The devices can be equipped with an optional gas guard. The
gas guard allows the connection of a secondary gas supply
system and automatically controls the gas supply when the
primary gas container becomes empty.
Devices with gas guard have an additional distributor for the
connection of an additional CO
2
incubator so that several
devices can be supplied by one central gas supply system.
Label:
Fig. 9: The label [3] contains information about gas supply, an
alarm contact terminal legend, and notes about the electrical
fusing of the device.
RS 232 interface:
Fig. 9: Via the RS 232 interface [4], the incubator can be con-
nected to the serial interface of a PC. This connection allows
the computer-aided acquisition and documentation of the major
operating parameters (temperature, CO
2
/O
2
concentration,
failure codes, etc.).
Fig. 9
Supply interfaces