Sammic SU Series, Руководство пользователя

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11
EN
observed in the exhaust.
COMMENTS
If, when the machine is in the vacuum cycle,
the sensor detects that the vacuum pressure
does not reach the programmed setpoint, after
a waiting time the cycle is stopped and changed
to the decompression process.
If, upon initiating the decompression process,
the lid does not open, after a time the
decompression electro-valve disconnects to
prevent damage to the valve or to the electronic
board.
Other important information:
- This machine is not designed for use by people
(including children) with reduced physical,
sensory or mental capabilities or lacking the
necessary experience or knowledge, unless
they have received supervision or instructions
from someone responsible for their safety.
- Children must be supervised to ensure that
they do not play with the device.
Vacuum is a method of natural food preservation
that consists in removing air from the pack,
eliminating oxygen, the principal food spoilage
agent.
Advantages of vacuum-packing
1- Maximum reduction of product wastage.
2- Maximum return from labour hours by making
good use of any idle times occurring within
the week in order to speed up work and to
quicken the process flow in the kitchen.
3- Rational storage of products in cold rooms:
- Odors will not mix up.
- Products can be labelled, which facilitates
the turnover of raw materials.
- Improvement of inventory control, since
anything to be purchased at a given time
can be determined with greater accuracy.
4- Exploitation of the best-to-buy days:
- Shopping can be made when prices are
lower.
- Less travels are needed.
5- Less washing-up.
Packing of cured products (sausages,
hams, etc.)
These per se durable products can see their
shelf-life at least doubled when vacuum-
packed. Vacuum-packing also prevents them
from drying up or losing weight, which would
entail an economic loss. Except for some that
are fragile in texture, these products require no
gas injection.
Packing of cooked food
This concerns such food as roast meats, stews,
cannelloni, etc. Once cooked, these products
must be cooled down to the core from +65ºC to
+10ºC in less than two hours, in order to prevent
microorganisms from developing.
Vacuum-packing is perhaps the most practical
method of maintaining traditional cooking with
these advantages:
- Easy food processing, without risk of product
spoilage.
- Longer product life.
Cooking of vacuum-packed food
Put food into a tight and heat-resistant
container. Remove any air from the inside, seal
the container and heat it to cook the food inside.
Cooking is done at low temperatures (65ºC to
100ºC), producing a pasteurising effect. This
process has many advantages. Indeed, among
others:
- it maintains the nutritional values.
- It safeguards hygiene, as there is less handling.
-
It reduces weight loss, by preventing
evaporation and drying.
- It allows rational work planning. Food
processing and cooking outside service hours;
preparation of banquets in advance, etc.
- It increases the storage time.
Food must be cooled down immediately after
cooking, in order to stop the cooking process
and to prevent the growth of microorganisms.
Cooling is achieved with a temperature reducer.
Refrigerated foods: Temperature at the core of
the product must descend from +65ºC to +10ºC
in less than 2 hours.
Frozen foods: Temperature at the core of the
product must descend from +65ºC to -18ºC in
less than 4.5 hours..
Thereafter, food is to be kept at a temperature
of 0ºC to 3ºC as for refrigerated dishes and of
-18ºC if frozen.
When so-packed food is to be prepared to be
savoured, the reconstitution process must
start immediately after taking the pack out of
the fridge or freezer. Basically, there are three
reconstitution techniques: the low-pressure
steam oven, a bain-marie, and a microwave
oven. In the first two cases, food can be
reconstituted within their packing, while the bag
must be perforated or removed for reconstitution
in a microwave oven, so that steam can escape
without the bag bursting.
Any reconstituted product that is not consumed
may not be stored again.
Refrigerated food should not be stored for more
than 6-21 days.
Gas-packing
The process consists in replacing the air
surrounding food in a bag by a gas mixture in
a proportion different to the air quantity, with a
double objective:
- to prolong the life of food without additives
or preservatives, by inhibiting degradation
processes that develop during storage; and
- to prevent the crushing of products like salads,
bread rolls, etc.
Mainly three gases or their mixtures are
used: O2, CO2 and N2. As a general guide,
it can be assumed that a greater (controlled)
concentration of CO2 increases the product
life, while a given amount of N2 prevents the
container of quick metabolising food from
breaking and a small quantity of O2 ensures that
some types of food keep their good condition
and aspect.
It is recommended that specialist gas
manufacturers should be consulted on what
combination of gases is adequate for a given
product.
Freezing of vacuum-packed food.
Conventional freezing techniques allow keeping
the product, but not all of its qualities. Freezing
vacuum-packed food has many advantages:
- No external frostbiting
- No surface frosting
- No loss of taste or aroma
- No drying
- No oxidation of fats
THE BASICS OF VACUUM-PACKING TECHNOLOGY