Leica EM FC7, Operating Manual

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Page 7 Operating Manual Leica EM FC7 01/10
Fig.1.1: When working with LN
2
avoid protective glasses (a), boots (c), walking
shoes (e) and protective gloves (g) out of which the LN
2
cannot easily escape if
entered. LN
2
splashing into the closed protective glasses (a), open boots (c), shoes
(e) or protective gloves (g) evaporates suddenly and can cause serious burns.
Always use protective glasses (b) with side protection which are open at the top and
at the bottom. Only use boots if you have loose (not narrow) trousers coming
outside the boots (d) and completely covering the gap. Wear only open slip-on
sandals (f) in the lab, no walking shoes or court shoes. Always wear cuffless
trousers if you wear slip-on sandals. Never wear protective gloves when pouring
LN
2
or when putting the Dewar head on the Dewar vessel. Just use an open flannel
cloth (h) to protect your hands from the cold. Gloves should be used only to grasp
dry cold parts. They are unsuitable for LN
2
work.