Analyzer Head Maintenance; Enclosed Source - Ametek FlarePro User Manual

Analyzer Head Maintenance

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4-4 FlarePro Process Mass Spectrometer
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The analyzer head requires periodic maintenance. When handling
the analyzer head, follow standard vacuum practices, including:
- Do not touch any parts within the vacuum system with
bare hands. Wear lint-free and powder-free gloves.
- Make sure that the area in which you are performing the
maintenance is clean.
- Do not blow off or dry any parts using compressed air unless
you know that it is moisture-free and oil-free.
- After cleaning, dry the parts in an oven or use a heat gun.
• The entire head can be disassembled with the exception of the Mass Filter
subassembly. Most parts can be replaced if necessary.
• As the analyzer head is used, deposits will form on the Source
parts and on the Mass Filter. The lifetime of the Source parts
varies with application, exposure time, and vacuum pressure.
Do not place the Mass Filter in an ultrasonic cleaner. The filter
parts can become loose during ultrasonic cleaning. This will
significantly degrade analyzer performance. A loosened Mass
Filter must be replaced.
A factory inspection/repair is recommended when poor
sensitivity is observed (e.g. less than 1 x 10-10A for nitrogen in
air).

Enclosed Source

The Source contains a dual-wire Filament so the analyzer can
continue to function if one side of the Filament burns out. The
replacement Filament comes in a protective container and can be
replaced in the field. Refer to "How to Remove the Sensor for Service"
in this chapter to learn how to remove the Sensor from the Main
Electronics to be able to replace parts and clean it.
• The Filament should be replaced soon after its resistance exceeds
1.3 ohms (yttria coated iridium filament) or 2.5 ohms (tungsten
filament), or when it is determined to be half-open (Filament LED
is YELLOW).
• If the analyzer is vented to air repeatedly while the Filament is on,
the Filament can burn out and yttrium oxide and iridium debris
will cover the Source components.