Bruker minispec mq20, User Manual, Page: 24 / 86

Introduction
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5.1 Siting Considerations
Place the units on a strong, level, non-magnetic benchtop surface, capable of supporting their
weight (refer to Weights and Dimensions). A minimum distance of 10 cm should be allowed
between the back of the Electronic Control Unit and adjacent objects in order to ensure
sufficient air-cooling.
Since objects containing iron can influence the magnetic field inside the Magnet Unit, do not
locate the Magnet Unit within 1 m of large iron objects or within 2 m of moving metallic
objects.
CAUTION
Accident or material damage hazard from falling or tilting instrument
Instrument may fall down or tilt during installation, retrofitting, dismantling, or while moving
on a cart.
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Use the carrying handles during lifting.
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When a table or cart is used, it should meet the requirements in the pre-installation
manual.
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The instrument should be secured to the cart or table.
5.1.1 Environmental Considerations
The minispec should be used in areas free from direct sunlight, heat sources and power
cables.
A constant temperature is important for field stability and accurate reproduction of
measurement results.
The usual magnet temperature (if not indicated different) is 40°C for all instruments.
These temperatures have been selected because they are well above the expected ambient
(laboratory) temperatures and therefore allow accurate tempering of the minispec unit.
Tempering of the magnet and the console electronics is accomplished with a closed cycle
zero maintenance, air ventilation system, so that no external air is ventilated through the
console or the Analyzer Unit.
In some factory environments where dust may be a problem, it may be desirable to house the
minispec computer in a clean room or ventilated housing, which is protected from dust. The
Analyzer Unit can be placed nearby at a location more convenient for process personnel.
The instrument contains strong magnetic fields, some of which extend beyond the Analyzer
unit housing (see stray field diagram page 14-17). These pose no danger to routine users,
but are hazardous to persons with heart pacemakers or other medical implantations.