22
If you use this procedure, you can identify any flasks that might leak. This
procedure also prevents rapid pressure increases, which might cause
flasks to fall off of the drying accessory.
•
If there appears to be a leak, check that the drain valve is fully closed and
all seals are clean. If the ModulyoD continues to leak, contact your
Thermo
Electron
distributor.
4.6
DRYING (cont’d)
CAUTION:
If using a manifold assembly, do not admit air into the ModulyoD
through the drain valve until all flasks have been removed, otherwise the flasks
may fall off of the manifolds.
Look at the pressure shown on the pressure gauge and the appearance of the product
and consult data gathered from previous freeze drying operations to determine when
the freeze drying process has finished. Note that the pressure shown on the gauge will
fall significantly when vapor is no longer being released from the sample.
Once the process has finished, shut down the ModulyoD as follows:
1.
If you use a manifold accessory, use the manifold valves to vent each
flask in turn. Remove and seal each flask.
2.
Switch the vacuum pump off by pressing the ‘Pump’ button.
3.
If you use other accessories, slowly open the drain valve to admit air to
the system.
4.
Remove the sample when the pressure shown on the pressure gauge
has reached atmospheric pressure (‘Hpr’).
5.
Press the ‘Fridge’ button to shut down the refrigeration system.
6.
Remove the drying accessory.
4.7
SHUT DOWN
Summary of Contents for ModulyoD
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