MKS HPQ3, Руководство по оборудованию

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MKS Instruments UK Ltd
HPQ3 Hardware Manual – SP101019.101 October 2012
47
7.4 Changing filaments
Changing filaments is the most common maintenance event with quadrupole analysers. For this
reason the HPQ3 analyser has been designed to make this task as quick and easy as possible.
Below is a list of the tools and equipment you will require. We recommend that you assemble the
following items before you start. Remember that the instrument is supplied with a tool kit that
contains some of the things you will need;
small jewelers screwdriver (2mm)
pair of tweezers
small pair of smooth jawed needle nosed pliers
pair of clean cotton gloves
clean bench on which to work
Ohmmeter
clean container in which to put small parts
replacement filament
a method of holding the analyser securely in an upright position, (a small bench vice is
ideal).
pen and paper on which to make notes and sketches
7.4.1 Removing the filaments
1. Remove the analyser from the vacuum system making sure that you do not touch the exposed
internal surfaces and place it on the bench in an upright position.
2. The filaments are located on the very top of the analyser, retained by two M2 x4 pan head
screws. The electrical connections are made via two barrel connectors, one to each filament, see
Fig.1.
3. Hold the barrel connectors highlighted in orange firmly with your pliers and slacken the screws
highlighted in red until the barrel connector can be removed from the filament plate and the
connecting lead, see Fig.2.
4. Remove the two M2 x4 pan head screws highlighted in red holding the filament plate in place,
see Fig.3.
5. Remove the filament plate assembly. Carry out this step carefully so as not to damage the
filaments or source cage, see Fig.4.