Installation
Cary 100/300/4000/5000/6000i/7000 Spectrophotometers User’s Guide 35
Nitrogen purging
Cary 100/300
The sample compartment of the Cary 100/300 can be nitrogen purged
if the Extended Sample Compartment is fitted. The nitrogen supply
should be attached to the inlet tubes beneath the Extended Sample
Compartment.
Refer to the Extended Sample Compartment operating instructions
in the Help for further information.
Cary 4000/5000/6000i/7000
The nitrogen purging system is NOT supplied by Agilent, but the
following items are available from appropriate commercial suppliers:
Nitrogen
Ultra-high purity liquid nitrogen, for example Nitrogen 5.0, (in
conjunction with a heat exchanger) is recommended because it is less
expensive than compressed nitrogen and is usually of better quality.
If compressed nitrogen must be used, the gas must be dry, oil-free
and uncontaminated.
CAUTION
Never use compressed nitrogen from a supplier who uses oil or water in the
compression process. Such processes invariably leave fine particles of oil
suspended in the nitrogen, which will form an oily deposit on optical surfaces.
Use nitrogen from a supplier who fills containers from immersion pumps
lubricated with liquid nitrogen.
NOTE
The instrument warranty will be void if damage is caused by the use of
unsatisfactory nitrogen.
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