60 Agilent Restricted Agilent 5110/5100 ICP-OES Service Manual
3 General Information
Air Cooling
Air Cooling
Air cooling forms part of the instrument thermal extraction system to remove excess heat and
maintain a stable instrument operating temperature.
Primary heat extraction is for the RF system with a plasma running. ~1400 Watts of thermal
energy is ducted from the instrument through the exhaust chimney.
A 230 Volt rotary fan controlled by the Mains Power Module is used to duct filtered air into the
instrument creating a positive pressure environment within the instrument to minimise the entry
of corrosive contaminants.
The cooling fan uses variable speed control running at ~60% of maximum speed to remove
heat/gases with plasma on and 30% speed with plasma off to minimise ambient noise in idle
state but still provide cooling for the instrument electronics.
Air flow is monitored by a flow sensor mounted in the extraction chimney assembly and
instrument temperature is monitored by a number of sensors mounted on various modules
throughout the instrument.
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