BINDER UF V 500 - Manual (Page 20)

UF V (E2+E2.1) 03/2013 page 20/112
Cooling system
The powerful, energy-efficient and low-noise refrigerating machine uses the refrigerants R404a and
R508b. They are completely free of HCFCs (hydrochlorofluorocarbons) and CFCs (chlorofluorocarbon)
and not inflammable.
Control of the two-stage refrigerating machine: The 1
st stage cooling immediately turns on. In addition, the
2 nd stage cooling turns on depending on the temperature.
Safety
Thanks to the standard overtemperature safety device, the set temperature is maintained also in case of
a controller failure.
In case of power failure at -80 °C / -112 °F, a temperature of -60 °C / -76 °F will not be exceeded in an
empty freezer for at least 3 hours, in a loaded freezer (measured with a 30 kg / 66 lb water load) for ap-
prox. 7 hours.
The freezer is equipped with a rechargeable battery (12 V, 7.2 Ah). Battery voltage is regularly monitored.
An alarm indicates too low battery voltage. You can check battery voltage in the “USER” menu.
The advanced voltage booster provides automatic voltage compensation through a buck/boost converter
(standard with UF V UL, option for UF V, chap. 4.7).
An error diagnostics system monitors the unit functions and generates audible and visual warning and
alarm messages. The door is monitored for being closed.
The CO
2
emergency cooling (option, chap. 11) offers additional refrigeration, i.e., following introduction of
a heat load, in case of a power failure or failure of the cooling system.
Data monitoring and recording
The freezer is regularly equipped with a zero-voltage relay alarm output (chap. 10.10) and with an analog
output (chap. 12.3) for integration into customer systems. An additional independent Pt100 temperature
sensor with output on Lemo socket is available (option, chap. 12.4). The freezer can be optionally
equipped with an Ethernet interface (option, chap. 12.1) for computer communication, enabling monitor-
ing via a network. The BINDER communication software APT-COM™ 3 DataControlSystem (option,
chap. 12.2) permits networking of up to 30 units and connection to a computer, as well as recording and
representing temperature data.
A circular chart recorder (option for UF V UL, chap. 12.5) or a data logger with USB port that is inde-
pendent from the chamber controller (standard with UF V UL, option for UF V, chap. 12.6) serve to inde-
pendently record the temperature values, data given out in compliance with FDA guideline 21 CFR part
11.