Discovery DSC™ Getting Started Guide
Page 6
Electrical Safety
You must unplug the instrument before doing any maintenance or repair work; voltages as high as
120/240 VAC are present in the instrument.
Handling Liquid Nitrogen
Some of the cooling accessories use the cryogenic (low-temperature) agent, liquid nitrogen, for cooling.
Because of its low temperature (–196°C [–321°F)]), liquid nitrogen will burn the skin. When you work
with liquid nitrogen, use the following precautions:
1
Wear goggles or a face shield, gloves large enough to be removed easily, and a rubber apron. For extra
protection, wear high-topped, sturdy shoes, and leave your pant legs outside the tops.
2
Transfer the liquid slowly to prevent thermal shock to the equipment. Use containers that have satisfactory
low-temperature properties. Ensure that closed containers have vents to relieve pressure.
3
The purity of liquid nitrogen decreases when exposed to air. If the liquid in a container has been open
to the atmosphere for a prolonged period, analyze the remaining liquid before using it for any purpose
where high oxygen content could be dangerous.
DANGER: Risk of electric shock. High voltages are present in this instrument. Maintenance and
repair of internal parts must be performed only by TA Instruments or other qualified service per-
sonnel.
DANGER: Risque de choc électrique. Présence de tensions élevées dans cet instrument. La
maintenance et la réparation des pièces internes doivent être effectuées uniquement par TA
Instruments ou tout autre personnel d'entretien qualifié.
WARNING: Protective earthing is provided through the mains power cord. Use of a grounded
mains power outlet is required.
AVERTISSEMENT: Mise à la terre de protection est assurée par le cordon d'alimentation secteur.
Utilisation d'une prise d'alimentation secteur terre est nécessaire.
WARNING: Liquid nitrogen boils rapidly when exposed to room temperature. Be certain that
areas where liquid nitrogen is used are well ventilated to prevent displacement of oxygen in the
air.
AVERTISSEMENT: L'azote liquide bout rapidement lorsqu'il est exposé à la température ambi-
ante. Assurez-vous que les zones où l'azote liquide est utilisé sont bien aérées pour éviter le
déplacement de l'oxygène dans l'air.
