Analyzer Qma 250; Fig. 3: System Overview; Fig. 4: Analyzers With Transport Protection - Pfeiffer Vacuum PrismaPro QMG 250 Translation Of The Original

Product description
1
QMA 250
Fig. 3:
1 Ion source
2 Mass filter
3 Faraday detector
4 Secondary electron multiplier (EM)
3.2.2 Analyzer QMA 250
The analyzer is made up of the following components:
● Ion source
● Quadrupole mass filter
● Ion detector
There are 2 variants of ion detectors:
● Analyzer QMA 250 F with Faraday cup
● Analyzer QMA 250 M with combination of Faraday cup and secondary electron multiplier (EM)
1
Fig. 4:
1 Analyzer QMA 250 F
2 Transport protection
3 Analyzer QMA 250 M
The secondary electron multiplier (EM) is a current amplifier working under high-vacuum conditions. An-
alyzers with EM are used for residual gas and trace gas analysis at very low total pressure and applica-
tions in which a high measuring speed is required.
Analyzers with Faraday detector provide a residual gas analysis in the total pressure range > 10
Pfeiffer Vacuum supplies the analyzer QMA 250 F with Faraday cup in the open ion source version on-
ly. The QMA 250 M is optionally available with open ion source, cross beam ion source, or grid ion
source.
20/86
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2
4
System overview
and intermediate piece DN 40 CF-F (116 mm in length)
2
3
Analyzers with transport protection
5
QME 250 IO 250
SP 250
DI
8
5 Connection to PC (Ethernet) with PV MassSpec
6 Gauges
7 Additional inputs and outputs (analog / digital)
8 Voltage supply
5
4
4 Intermediate piece
5 Transport protection
AI DO AO
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6
-7
hPa.