Introduction
22 Agilent Microwave Plasma Atomic Emission Spectrometers User’s Guide
WARNING
Hot Surface
The external vent may become hot during MP-AES instrument operation and
remain hot for some time after the MP-AES instrument has been switched off.
Allow the external vent to cool for at least five minutes before attempting to
remove the exhaust hose. Use heat-resistant gloves.
MP-AES instrument cooling air supply
The MP-AES instrument requires clean, dry, non-corrosive air for
cooling purposes. This is supplied to the MP-AES instrument through
an air supply vent located at the top, rear of the instrument. The vent
has a dust filter, to filter out particulate matter.
The air supply is used to cool the internal mechanical and electronic
components of the MP-AES instrument. Several of these assemblies
contain parts prone to corrosion. The introduction of cooling air
contaminated with high levels of acid vapors or other corrosive
substances may cause damage to the MP-AES instrument.
Due to the corrosive nature of some analytical work, it is
recommended that in applications demanding high usage of corrosive
materials, an external cooling air supply system is provided. It is
required that the cooling air be supplied from an environmentally-
controlled area that is away from the MP-AES instrument exhaust
and any other area where corrosive materials are stored or used. Do
not duct humid, warm air into an MP-AES instrument in a cooled
laboratory environment.
The cooling air system with flue, fan, ducting and supply cowl, must
provide a minimum positive flow of 3 m
3
/min (106 ft
3
/min). The
ducting should be corrosion-resistant and fire-proof.
Drain vessel
The MP-AES instrument needs a drain vessel for disposal of excess
fluids and vapors from the spray chamber. Suitable tubing is
supplied with the MP-AES instrument for use with inorganic
solvents. When using organic solvents, different drain tubing that is
suitable for the solvent in use will be required.
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