Options - Thermo Scientific VARIOKLAV 25T Operating Manual

minutes.Once the specified sterilizing temperature has been reached, the
sterilizing time will start running. Then the sterilizer is used as a steam pot (set
temperature of 98 °C), no pressure builds up in the sterilization chamber (8).
When the sterilizing time has run out, the sterilizing chamber (8) cools according to
the selected program:
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In the case of the Multiple sterilization special program, the program cycle of
heating, sterilizing, cooling and drying (optional) repeats itself according to the
selected multiple sterilization number.
The sterilization phase display (24) shows the current status of program execution.
When the program has been completed, the acoustic signal will be sound and the
light in the green START/STOP key (19) will flash. Pressing the green
START/STOP key (19) will terminate the program. The door is unlocked, and the
door indicator (20) changes to green again.
The sterilizer is ready for a new cycle immediately after the sterilized items have
been removed and the feed water tank has been filled up (if required) with
deionized water.
4.1

Options

Media temperature control
With this option, the sterilizer is additionally equipped with a flexible
temperature sensor. The flexible temperature sensor measures the media
temperature in a reference flask. In all Liquids programs, the sterilizing timer
is not actuated until the media has reached the sterilizing temperature. The
program is not terminated until the media temperature has dropped below
90 °C. The thermolock prevents the sterilizer from being opened
prematurely. This allows safe removal of liquid sterilizing articles at the end
of sterilization.
Type RM water recooling system
With this option, the sterilizer is additionally equipped with a fast recooling
system. In the Liquids RM program, cooling water is led through a separate
cooling coil within the jacket space during the cooling phase. This cools the
sterilizing chamber from outside, and batch times are shortened.
Type FA exhaust air filtration
With this option, the sterilizer is additionally equipped with a sterile air filter
(FA) (see also Chapter 4.3.1). The exhaust air filtration is effective in all
programs. Once commissioned, it can not be decommissioned. In this way
you can exclude the possibility that contaminated materials are sterilized
without exhaust air filtration. The cycle display (16) now also shows the filter
symbol
03/2007
Instruments program: rapid pressure release to a removal pressure
below 110 kPa .
Waste (Destruction) program: delayed pressure release to a removal
pressure below 110 kPa .
Liquids: slow pressure release. The sterilization cycle is not ended until
the reference temperature has dropped below 90 °C (thermolock).
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4 Function
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