Introduction
20
Agilent 700 Series ICP Optical Emission Spectrometers User’s Guide
Other Connections
IEEE 488
NOTE
Basic insulation is provided for single fault protection on the IEEE connector.
Gas Supplies
The installation of compressed or liquid gas supplies must comply
with the rules and/or regulations imposed by the local authorities
responsible for such use in the workplace.
Liquid or gaseous argon and nitrogen may be used with Agilent
ICP-OES spectrometer systems. Agilent recommends the use of liquid
gases, which are more pure, more convenient and cheaper per unit
volume.
The main gas supply requirement is argon for supply to the plasma,
nebulizer and optics interface purge. Gas is also required to purge
the polychromator assembly, and this may be either argon or
nitrogen. A separate gas line connects internally to the argon supply
unless the optional nitrogen purge kit is fitted (either factory or field
fitted).
Table 1.
Gas requirements
Argon
Nitrogen
Purity
99.996% 99.996%
Oxygen
<5 ppm
<5 ppm
Nitrogen (argon only)
<20 ppm
-
Water vapor
<4 ppm
<4 ppm
Permissible pressure range
400–600 kPa (57 to 88 psi)
Recommended pressure
550 kPa (80 psi) regulated
