M&C TechGroup PMA 10S Data sheet - Manual

M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
[email protected] • www.mc-techgroup.com • Fon +49 2102 935-0 • Fax +49 2102 935-111
13.2
Embracing Challenge
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Discontinuous oxygen purity measure-
ment within the expanded range of 99
to 100 volume % O2
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Portable and rugged instrument, light-
weight
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Analogue and digital linear
indication
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Physical measuring principle
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Small dead volume, fast response time
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High accuracy and reliability
Special Features
Oxygen Analyser Series PMA®
Portable version PMA 10S
for oxygen purity measurement
PMA 10S
Application
Due to the extremely fast response time of
the patented M&C magneto-dynamic meas-
uring cell with no stagnant volume as well
as the negligible cross sensitivity from other
sample gas components, the portable M&C
oxygen analyser PMA 10S does not normally
limit its use for a wide variety of applica-
tions where oxygen purity measurements are
essential.
Description
The PMA 10S oxygen purity analyser, being an
extended version of the PMA 10, is provided
with an electronic suppression system which
enables oxygen purity measureents within
the expanded 99-100 vol.% range.
This measuring range is displayed on the
analogue meter whilst the digital indicator
remains for the 0-100% reading.
The electronic zero suppression system may
be selected by means of a push button switch
which is located on the control panel of the
instrument.
The PMA 10S analyser can normally be used
also for its standard PMA10 functions. Oxygen
purity measurements could only be made
discontinuously. The measuring accuracy of
the analyser can be maintained when calibra-
tion of the instrument with a certified gas
takes place before the measurement proce-
dure in order to avoid influence of ambient
temperature and pressure. A measurement of
1 vol.% can be easily realized whilst the maxi-
mum value remains at 100 vol.%. Other meas-
urement within this range can be performed.
– Further technical data see leaflet PMA10,
13.1. –
Measuring principle of M&C ox-
ygen analyser
The PMA 10S utilises the paramagnetic
principle of operation to measure oxygen
concentrations. The analyser measures the
paramagnetic susceptibility of the oxygen
in the sample gas by means of the M&C
magneto-dynamic measuring cell. The physi-
cal propertys which distinguishes oxygen
from other gases is its paramagnetism. It is
significantly higher comparing to other com-
mon gases. This operation principle is one of
the most accurate and reliable procedures
to determine the oxygen concentration in a
gas mixture from 0 to 100 Vol.%. The robust
M&C cross-flow cell has no stagnant volume.
Advantages are the fast response time, the
flow rate up to 60 l/hr, the small volume of
2 ml, the extremely low drift, the absolute
linearity and the negligible cross sensitivity
against other sample gas components. With
a proper sample conditioning and pressure,
the M&C cell will never need replacing. The
dumbbell with a small mirror at its centre is
mounted in a strong inhomogenous magnet-
ic field. The paramagnetic oxygen strength-
ens the forces on the diamagnetic dumbbell
and causes a shifting which is detected by
a system consisting of light beam, mirror
and a photo cell. A compensation current is
induced via the feedback coil on the dumb-
bell and leads to a reset of the dumbbell into
its zero-position.
The required current is linearly proportional to
the oxygen concentration.
Technical specifications and illustrations are without
obligation, subject to modifications. 05.97/12.06