Users Manual Henkovac 04-serie V2019
10.0 Further Explanation of Packaging Concepts
10.1 Sensor-Based Control
The actual air pressure in the chamber is measured by a sensor. The result of this measurement is digi-
tally indicated on the LCD display.
Normal air pressure is about 1000 mbar. The vacuum pump of the machine reduces this to about 2-5
mbar. Depending on the program, the pressure by which certain functions need to take place can be
programmed. Examples are MAP gassing and Soft-Air.
The air pressure in time-controlled machines is indicated by the analog vacuum gauge.
10.2 Time-Based Control
The standard control of a One-Program machine, as well as a Ten-Program machine, is time-based
The Ten-Program time based machine can be converted into sensor-based operation by
ordering the optional sensor kit
A time-controlled machine is programmed with a time value in seconds, according
to which a desired vacuum is reached. The vacuum measurement is indicated by the
analog vacuum gauge. The reading of the analog vacuum gauge is less accurate than
the digital reading of a sensor-controlled machine.
The Ten-Program machine can be retro-fitted with a sensor kit at a later date. The control system
recognizes the sensor and will automatically switch over to sensor-based operation
In case the sensor should fail, the machine will automatically switch over to time-based operation
10.3 P H
2
O Program for Liquid Products
Only for Ten-Program machines with sensor-based control
Specially designed for the packaging of cooled liquid products like sauces and soups at tempera-
tures < 15
0
C (60
0
F)
Under normal air pressure (1000 mbar), water boils at 100
o
C. At that point, water transfers rapidly
from a liquid phase to a gas phase. At lower air pressure, boiling starts at a lower temperature as well
as rapid evaporation. To avoid product loss through evaporation and spillage, the P H
2
O program de-
tects the point of boiling and initiatese sealing function in the cycle. Since air is replaced by water va-
por at this point, the oxygen content in the package will be very low.
10.4 Vacuum Plus (seconds)
Only for Ten-Program machines with sensor-based control
Can be turned on or off in the Settings menu
After reaching a programmed vacuum pressure, the sealing function may be delayed by adding a pro-
grammable number of seconds to the vacuum process. This enables any air to escape from porous
products.
10.5 MAP Gassing (option)
Only for Ten-Program machines with sensor-based control
Can be turned on or off in the Settings menu
After reaching a programmed vacuum pressure, the package is filled with an
inert gas, such as CO2, nitrogen, oxygen, or a mixture thereof. This feature is
either time or pressure-controlled.
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