Liebherr WTes 5872 Vinidor - Manual (Page 14)

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8,0 °C
7,5 °C
7,0 °C
6,5 °C
6,0 °C
5,5 °C
5,0 °C
4,5 °C
4,0 °C
3,5 °C
3,0 °C
2,5 °C
2,0 °C t1 t2 t3 t4 t5 t6 t7 t8 t9
Cal. 5.0°C +0.5°C
+0.5°C
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Storage of explosive and
highly fl ammable substances
Laboratory refrigerators and freezers with Comfort electronic controller and spark-free interior
T he range of laboratory appliances with Comfort electronic
controllers comprises two refrigerators and two freezers with
spark-free interior for storing explosive and highly fl ammable
substances - for instance in the chemical industry or in special
laboratories. The interiors of the appliances are in compliance with
the safety requirements of the EU Directive 94/9/EC (ATEX 95) and
have been tested to the EN 1127-1, IEC 60079-0 and IEC 60079-15
standards by electro-suisse – SEV (Swiss Association for Electrical
Engineering, Power and Information Technologies), the ATEX
conformity evaluation organisation.
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The Comfort electronic controller
The precision Comfort electronic controller with digital temperature display enables temperatures to be
set accurately. Symbols indicate the operating status of the appliance at all times. To satisfy laboratory
hygiene requirements, the Comfort electronic controller is fl ush-mounted and has an easy-clean
membrane keypad.
Certifi ed to ATEX 95
All laboratory refrigerators and freezers with spark-free interior are tested according to the 94/9 EC
(ATEX 95) Directive. Rated as II 3G Ex nA II T6, these appliances are suitable for storing explosive and
highly fl ammable substances in sealed containers.
Maximum temperature stability and temperature consistency
In conjunction with the precision Comfort electronic controller, the forced-air cooling system of the
laboratory refrigerators and the static cooling system of the laboratory freezers with spark-free
interior ensure maximum temperature stability and high temperature consistency. The laboratory
refrigerators are equipped with a secondary safety thermostat to prevent temperatures below +2°C in
case of a fault. All the laboratory appliances with Comfort electronic controllers are tested according
to the NF X 15-140 standard with regard to maximum temperature stability and optimal temperature
consistency.
Integrated alarm systems
A visual and audible temperature alarm alerts the user if temperature deviation limits are
exceeded. The parameters for the temperature alarm can be individually set. In addition, a visual
and audible door alarm is activated if the door is open for longer than 1 minute. The door-open alarm
delay can be adjusted between 1 and 5 minutes. Furthermore, the laboratory appliances with
Comfort electronic controllers have a visual power failure alarm when mains power returns and
a sensor defect alarm.
Integrated data memory with min/max temperatures
The Comfort electronic controller has an integrated data memory. It logs the maximum and minimum
internal temperatures that occurred once the set temperature was reached, the last three temperature
alarms and power failures, together with the time, date and duration of the alarm. The respective data
can be recalled using the AlarmLog function and read on the display panel.
1-point calibration
The laboratory appliances with Comfort electronic controllers provide 1-point calibration for accurate
temperature control. This permits compensation between the set temperature and the actual internal
temperature. Positive or negative changes to the correction value can be made in steps of 0.1K.
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