MAX300-RTG : Hardware Manual Hardware Maintenance
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MAX300-RTG Hardware Maintenance
Overview
The MAX300-RTG, quadrupole process mass spectrometer, is designed for
operation by users with no previous mass spectrometer experience. The analyzer
performs the ionization, mass filtering, and detection of specified gas and vapor
components. The enclosure includes vacuum pumps (both mechanical and
turbomolecular), the quadrupole controller (QC), and the vacuum chamber. The
onboard computer operates the mass spectrometer, calculates derived values,
and manages external communications.
The vacuum chamber has five all metal sealed high vacuum ports to connect
components to the chamber. The ionizer assembly, detector, and turbomolecular
pump use 4-1/2 inch flanges to connect to the chamber. The RF (electrical)
connection for the quadrupole is a 3-3/8 inch flange on the top of the chamber. A
port for the vacuum gauge is on the chamber side, in line with the turbo pump. To
ensure proper operation, maintenance of the mass spectrometer hardware is
required.
Venting the Vacuum System
Required Tools
(1) Flat blade screwdriver, ¼ inch
To perform maintenance on the pumps or components within the vacuum
chamber, the system must be cooled down and vented.
1. With the control software, choose Control Parameters under the
Configuration Tab
2. To turn off the Filaments, Multiplier, and Ion Gauge, remove the
check in the boxes next to them
3. Under Ionizer, note the original temperature and set the Temperature
Set Point to 0
o
C
4. Set the sample inlet valve to a stream not containing condensable
components. The zero gas is usually suitable.
5. On the transfer line heater control panel, switch off the transfer line
heater
6. Unplug the heater, which is bolted to the ionizer flange and plugged
into a plastic connector directly behind the ionizer, Figure 27, page
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