2.1.2 Environmental Requirements
Indoor use
Altitudes of up to 2000 meters (6600’)
Up to 90% relative humidity – non-condensing
Temperature between 15
O
C - 32
O
C (59
O
F - 90
O
F)
Note: Recommended operating temperature is 25
o
C (77
o
F).
Must be installed in room with sufficient ventilation. The room ventilation should be a technical
ventilation that is in accordance with the requirements of ZH 1/119 (Guidelines for laboratories) or
some other suited ventilation system with appropriate capacity.
2.1.3 Power Requirements
Designed for 230 VAC 50Hz 1Φ electrical rating
An unobstructed dedicated power outlet which is not shared with other appliances.
Installation Category: II
Note: Installation category (over voltage category) defines the level of transient over voltage which the
instrument is designed to withstand safely. It depends on the nature of the electricity supply and its over voltage
protection means. For example, in CAT II, which is the category used for instruments in installations supplied from
a supply comparable to public mains such as hospital and research laboratories and most industrial laboratories,
the expected transient over voltage is 2500 V for a 230 V supply and 1500 V for a 120 V supply.
Performance criteria B in voltage dips & short interruptions immunity test.
Note: During the voltage dips & short interruptions immunity test, flicker of the fluorescent light was observed
when the voltage dips and short interruption were being applied on the AC mains port of the equipment and self-
recovered after the test.
It is recommended that the voltage fluctuation doesn't exceed ±10% of the nominal voltage at all
times, or else an electrical power stabilizer can be installed.
UPS is recommended for better protection. If UPS is not used and there is a power failure, the
operator must take immediate action to prevent the danger of potential warm-up.
2.2 Installation
2.2.1 Unit Leveling
It is important that the equipment is properly leveled by positioning a bubble level on the middle shelf of the
freezer. The freezer has built in leveling feet for adjustment. To raise a corner with a leveling foot, use a cross
wrench to turn the leveling leg that appears to be in a low position in the counterclockwise direction.
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