Introduction
20 Agilent Microwave Plasma Atomic Emission Spectrometers User’s Guide
Other electrical connections
USB
NOTE
Basic insulation is provided for single fault protection on the USB connector.
Gas supplies
The primary gas used by the MP-AES instrument is nitrogen, which is
the supply gas for the plasma. A small quantity of argon is used in
the plasma ignition cycle. Oil-free compressed air is used for the
pre-optics protection gas. Other gases may be required for future
options and accessories. Use only ‘instrument-grade’ nitrogen with
your MP-AES instrument.
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.
See the Agilent MP-AES Site Preparation Guide for gas pressure
requirements.
Liquid or gaseous argon and nitrogen may be used with the MP-AES
instrument. Agilent recommends the use of liquid gases, which are
more pure, more convenient and cheaper per unit volume.
The main gas supply requirements used with the MP-AES instrument
are:
Nitrogen — for the plasma and nebulizer gas supply
Air — for the pre-optics protection gas
Argon — only required during plasma ignition
Additional gas supply requirements used when the optional External
Gas Control Module (EGCM) or Monochromator Air Purge
accessories are installed are:
Purge gas: nitrogen — for optics purging when analyzing elements
below 185 nm, or air — for optics purging in corrosive
environments
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