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UF V (E3) 10/2020 Page 17/119
2. Chamber description
The ULTRA.Guard™ ultra-low temperature freezers UF V were produced with great care using the latest
tools for development and production. They were optimized for safe long-term storage of samples in the
ultra-low temperature range. You can operate the freezer in a temperature range from -90 °C / -130 °F up
to -40 °C / -40 °F.
The UF V-UL chambers are regularly equipped with the advanced voltage booster AVC (option for UF V).
The freezers are available for several different voltages.
Door access system (option):
The freezers are optionally available with an electromechanical door locking and electronic access control
via NumPad, permitting personalized access control.
A pushbutton permits opening the electromechanical door locking without using your hands. A pull-tight
function automatically closes the outer door when slightly open.
Lockable protective flap for the main power switch (option)
An additional locking system with key for the freezer’s main power switch is optionally available.
Controller
The efficient RD4 chamber controller is equipped with a multitude of operating functions, in addition to
recorder and alarm functions. Set-point entry is easily accomplished directly via the chamber controller and
is also possible directly with a computer via Intranet in connection with the APT-COM™ 4 Multi Manage-
ment Software (option, chap. 22.2).
Temperature setting is accurate to a tenth of a degree. The controller is mounted at the optimal height for
operation.
The controller offers an error diagnostics system generating audible and visual warning and alarm mes-
sages.
Chambers with the option “battery-buffered alarm system”: During power failure, alarm function and control
remain active during 72h. The controller provides password protection for the setting menus.
The controller monitors ambient temperature and issues an alarm if it exceeds an adjustable value.
Housing
The inner chamber and the inside of the insulated outer door are made of stainless steel (German material
no. 1.4016, US equivalent AISI 430). The housing including all corners and edges is RAL 7035 varnished.
The inner surfaces are smooth and therefore easy to clean. Easy front access permits filter cleaning without
tools. Two 28 mm access port serve to introduce a sensor cable of a measuring device, the upper one also
to connect the optional CO
2
emergency cooling.
The buildup of ice in the door area is minimal due to perfect closing of the inner and outer doors. Precise
spatial distribution of the cold in the interior ensures storage of all samples at an identical storage temper-
ature. The prevention of thermal bridges protects against defrosting. The combination of vacuum insulation
panels (V technology) and CFC-free polyurethane foaming maximizes the cold storage capacity.
The freezer has two compartment doors. You can insert stainless steel shelves are make optimum use of
the interior. You can flexibly arrange the shelves to use the interior in a variable and optimum manner.
Inventory racks (stainless steel storage racks with cryo boxes, chap. 23) are optionally available.
Castors with locks serve to move the freezer.
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