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PMA 10
Embracing Challenge
Oxygen Analyser Series PMA®
Portable version PMA 10
for mobile oxygen measurement
Special Features
Portable and rugged instrument, light-
weight
Analogue and digital linear indication
Physical measuring principle
Small stagnant volume, fast response
time
High accuracy and reliability
Approved according to DIN EN 14181
resp. to 13th and 17th BImSchV and TÜV
certicate TA-Luft as option
Application
Due to the extremely fast response time
of the M&C magneto-dynamic measuring
cell with no stagnant volume as well as the
negligible cross sensitivity from other sample
gas components, the portable M&C oxygen
analyser PMA 10 has a wide variety of applications. The analyser is a suitable and reliable
instrument for monitoring oxygen concentrations in various gas analytical control applications including flue gas-, inert gas-, fermentation processes-, food packing machines-,
ambient air- and laboratory process control
measurements.
Description
The portable M&C oxygen analyser PMA 10 is
an non-thermostated instrument which has
been designed for continuous and discontinuous measurement of oxygen concentrations
in dry and particle-free sample gases.
The PMA 10 is a reliable and easy-to-operate
instrument and immediately operable. The
light-weight instrument is built into a portable housing. The four measuring ranges
are displayed on the analogue meter with
30%/100% scale and the 100% O2 range
also on the digital meter. One output signal
0-1V is available as standard. Sample gas
connections as well as a connector for the
output signal are located on the front panel
of the analyser. The connectors for incoming
power supply and optional O2 alarm contact
are located at the rear panel. The sample gas
enters the analyser via an internal protective fine-filter. The required flow rate can be
adjusted at the flowmeter with needle valve,
mounted on the front panel upstream the
M&C measuring cell.
Options: mA-output signal, O2 alarm,
rechargeable battery, internal pump and TÜV
certificate.
Measuring principle of M&C oxygen analyser
The PMA 10 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 physical property which distinguishes oxygen from
other gases is its paramagnetism. It is significantly higher comparing to other common
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 magnetic field. The
paramagnetic oxygen strengthens 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 dumbbell and leads to
a reset of the dumbbell into its zero-position.
The required current is linearly proportional to
the oxygen concentration.
Technical specications and illustrations are without
obligation, subject to modications. 05.97/08.09
M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
info@mc-techgroup.com • www.mc-techgroup.com • Fon +49 2102 935-0 • Fax +49 2102 935-111
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Gas flow diagram PMA10
1 2 4 3
O -Analyser
PMA 10
2
Alarm
Output
30
10
3
100
0
Span
Zero
0
0
Vol.% O
2
30
10
5
20
15
40
20
60
25
80
100
20,9
OutIn
Gas
202
150
260
1. Fine filter
2. Flowmeter with needle valve
3. Oxygen measuring cell PMA
4. Option internal pump
Dimensions
Dimensions in mm
Front View
Side View
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M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
info@mc-techgroup.com • www.mc-techgroup.com • Fon +49 2102 935-0 • Fax +49 2102 935-111
Technical specications and illustrations are without
obligation, subject to modications. 05.97/08.09
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Technical Data
Version PMA 10 portable oxygen analyser
Part No. 01A1000 : PMA 10, power supply 230V 50Hz, output signal 0-1 V; 01A1000a = 115V 60Hz
Measuring ranges selectable for 0-3, 0-10, 0-30 and 0-100 vol.% O2, linear
Indication analogue / digital meter:
analogue meter selectable for each range with a scale of 0-30 and 0-100%
digital meter, 3
Output signal 0-1V DC, non-isolated, load > 100 KΩ, for each selected range;
option: 0-20mA* or 4-20mA* for each selected range, non-isolated, max. load 300Ω Part no. 01A9000
Response time for 90% FSD < 3 seconds at 60 Nl/hr air
Accuracy after calibration analogue = ± 1% of span / digital = ± 0,1 vol.% O2 error of precision
Reproducibility analogue = < 1% of span / digital = ± 0,1 vol.% O2 error
Influence of ambient temperature zero point ± 0,02 vol.% O
Influence of barometric pressure The oxygen reading varies in direct proportion to changes of the barometric pressure.
Influence of sample gas flow variation in gas flow between 0-60 Nl/hr air will cause a difference of < 0,1 vol.% O
Sample gas inlet pressure 0,01 up to 1 bar g, (PMA 10 required admission pressure for competent flow rate, no pump inside)
option: PMA 10 with internal pump, capacity 0,9 Nl/min. without pressure, Part no. 01A9100
Sample gas outlet pressure Outlet of analyser must discharge freely into atmosphere.
Flow rate of sample gas max. 60 Nl/hr air, adjustable with needle valve on the flowmeter 7-70 Nl/hr
Temperature of sample gas -10 °C up to +40 °C, dry gas
Analyser temperature according to ambient temperature, non heated version
Ambient temperature -10 °C up to +55 °C
Storage temperature -20 °C up to +60 °C, relative humidity 0-90% RH
Power supply
internal power unit for 230VAC standard or 115VAC available (a)* +/-10%, 40-60Hz, 8VA
option: rechargeable battery, recharged by the internal power unit, Part no. 01A9050
battery capacity 10 hr, recharge time of battery 14 hr with instrument off
Electrical connections mains supply: 3-pole chassis plug with 2m of cable; signal: 3-pole plug
Materials in contact with sample gas Platinum, Glass, Polypropylene, Stainless Steel 316, FPM, Epoxy resin
Sample gas connection PP-hose nipple for DN 11-4 mm tube
Protection / electrical standard IP 41 EN 60529 / EN 61010
Housing / colour portable plastic housing / gray
Dimension / weight height 150 mm, width 202 mm, depth 260 mm / approx. 3 kg
Alarms
option: O2 alarm low* or high* adjustable 0-100% O2, relays contact NC/NO Part no. 01A9150
additional with acoustic signal and auto reset after 30 sec. Part no. 01A9155
additional with acoustic signal and manual reset, Part no. 01A9156
Certificate option: approved according to DIN EN 14181 resp. to 13th and 17th BImSchV and TA-Luft,
Part no. 01A9160
* Please specify with order.
In case the options alarm and pump are both required, a rechargeable battery is automatically obliged.
In case the option “acoustic alarm” required, the option “O2 alarm” is obliged.
Option “TÜV approved” includes 0*/4*-20mA signal output, as further options only rechargeable battery and internal pump available.
1
/
digit 9 mm high LCD for 0-100 % O2 reading, selectivity 0,1 vol.% O
2
/ °C; sensitivity ± 0,1 vol.% O
2
/ °C
2
2
.
2
W A R N I N G ! I M P O R T A N T !
An external fine filter must always be used at the gas inlet of the analyser.
Depending on the composition of the sample gas, it may be necessary to use a
sample conditioning system. Without precautions, the analyser is only suitable for
measuring of non-hazardous gases or gasmixtures in non-hazardous areas.
Technical specications and illustrations are without
obligation, subject to modications. 05.97/08.09
M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
info@mc-techgroup.com • www.mc-techgroup.com • Fon +49 2102 935-0 • Fax +49 2102 935-111
13.1
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