Publicidad
Idiomas disponibles
Idiomas disponibles
7.2.3.
END OF THE PROCESS
Press STOP to stop the pump and the refrigerating circuit. Open the air inlet of the valve on the side of the chamber.
The air inlet has to be opened very slowly to avoid the formation of turbulences that will spread about dust in the flasks
or plates. Next, the defrosting function is activated.
At the end of the process, the pump and the refrigerating unit will stop (the compressor stop is delayed in order to
extract all gases from the circuit). Next, a connection valve of the manifold or the venting valve placed at the top cover
has to be opened in order to ventilate the inside of the equipment.
It is necessary to connect a container to the outlet of the outflow pipe. Once this is done the manual outflow valve
placed at the left side can be opened. Start defrosting mode (see chapter 9.4) in order to heat the surface of the
condenser which allows you to extract the ice block in a few minutes. Also it is possible to heat the condenser until the
entire ice block has been defrosted and all the water has been drained through the outflow valve. In both cases it is
advisable to remove the chamber or the manifold to accelerate the defrosting.
Before the start of a new operation, check that the condenser has been totally defrosted, that there are no water traces
in the overflow pipe, and that the overflow valve is closed again.
7.3.
LYOPHILIZATION MODES
There are two possible lyophilisation modes: the AUTOMATIC mode (see chapter 9.3.) and the SEMIAUTOMATIC mode
(see chapter 9.2.). The automatic mode allows you to establish the processes, the parameters and the time by means
of a RECIPE (see chapter 10).
7.4.
SELECTABLE PROCESSES
Freezing: It starts up the refrigerating system and cools the condenser. The cooling system requires a preparation
time (5 minutes approx.) in which the temperature may increase slightly. After this the temperature will quickly
decrease. This step must be longer than 30 min to make sure that the system can reach the minimum temperature.
Cool+Vacuum: It starts up the refrigerating system, cools the condenser and starts up the vacuum unit. The vacuum
begins when the temperature of the condenser is lower than the established parameter (normally -40ºC). The control
of the vacuum level will depend on the Set Point programmed. The system will need a time longer than 20 min to
reach the minimum vacuum level.
Heat plates: It starts up the electrical resistors of the plates. They warm up until the programmed temperature has
been reached. Also it starts up the vacuum unit. The vacuum begins when the temperature of the condenser is lower
than the established parameter (normally -40ºC). The control of the vacuum level will depend on the Set Point
programmed.
Stop: It stops the system.
Each one of the processes may have parameters to set. In the automatic cycle it is also necessary to set the time for
each step. The parameters are the following ones:
Freezing
Cool + vacuum
Heat plates
Stop
When the equipment starts up, the compressor 1 and the refrigerating fans will start up. A few seconds later, the
compressor 2 will also start up (Lyoquest -85).
Depending on the temperature of the condenser probe, the electrically-operated valve of the refrigerating circuit may
take a certain time to start working. For this reason it is probable that the temperature increases some degrees
initially.
The pump starts to work when the Set Point has been reached, and once it works there is a small delay in opening the
vacuum valve.
IM-LYOQUEST-EN-SP-1016a.doc
Semiautomatic
-
Vacuum (mBar)
Vacuum (mBar)
Plates temperature (ºC)
-
Automatic
Time (HH:mm)
Vacuum (mBar)
Time (HH:mm)
Vacuum (mBar)
Plates temperature (ºC)
Time (HH:mm)
-
14 / 80
Publicidad
