CIRAS-3 Operation Manual V. 1.09 183 support@ppsystems.com
Air Filters
The internal optics and gas circuit are protected by a total of 5 internal air filters located inside the main
console.
• 2 Ea. Air filters for Reference and Analysis air (5 micron)
• 2 Ea. Air filters for Gas Blender air (25 micron)
• 1 Ea. Air filter for Air Supply Unit air (25 micron)
The blue air filters (Gas Blender, Reference and Analysis) and Air Supply Unit Hydrophobic Filter is held
in place by the gas tubing and can easily be changed by separating from the gas tubing. We recommend
that for optimal operation that these filters are changed regularly per the following schedule:
Air Supply Unit Hydrophobic Filter
• Heavy use (daily) in clean environments – Every 3 months
• Heavy use (daily) in dirty or dusty environments – Every 1 month
• Minimal use (once or twice per week) – Every 6 months
• Minimal use (once or twice per week) in dirty or dusty environments – Every 3 months
Blue Reference and Analysis Air Filters (5 micron)
• Once every year.
Gas Blender Air Filters (25 micron)
• Should not require replacement.
Reference & Analysis Filters
- Blue (5 micron)
Air Supply Unit Hydrophobic
Filter (white plastic)
Filters- Blue
(25 Micron)
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