Introduction
22
Agilent 700 Series ICP Optical Emission Spectrometers User’s Guide
Cryogenic Liquids
Cryogenic liquid gases are stored under pressure at very low
temperatures in Portable Liquid Cylinders (PLCs).
WARNING
Extreme Cold Hazard
Contact with the super-cold liquid, gas or pipe surfaces can cause severe
skin damage. The PLCs should be located in a shielded position, and all
piping should be routed or covered to prevent skin contact.
For high gas flow rates and/or low ambient temperatures, it may be
necessary to obtain the gas by passing the liquid through an external
evaporator rather than use the internal pressure building facility of
the PLCs.
Liquid argon and liquid nitrogen may
not
be stored for extended
periods and often have special storage requirements. Contact your
local authorities and cryogenic gas supplier for more detailed
information on storage requirements and boil-off rates for local types
of PLCs.
Water Cooling System
Agilent ICP-OES instruments require a source of cooling water. Refer
to the Site Preparation Guide for compatible water cooling systems.
NOTE
The operation manual, mounting and assembly hardware for the cooling system
are included in the water cooler packaging. Care should be exercised to locate all
of these articles before the pack is discarded.
NOTE
Pressure regulation is recommended for supplies where the cooling water
pressure may be subject to fluctuations. Pressure regulation is necessary for
supplies that may exceed the maximum permissible pressure of 310 kPa (45 psi).
