Oxygen Analyser Series PMA®
3Pages

Embracing Challenge Oxygen Analyser Series PMA®Version PMA 100 Microprocessor based, 19"-rack unit or table version PMA 100 Special Features ■ Safe in operation ■ High accuracy and reliability ■ Physical measuring principle, linear measuring ranges ■ Fast response time ■ Transducer unit temperature controlled at +55 °C ■ Solid 19" metal housing ■ Large LCD- indicator with background lighting ■ Selectable time constant for noise damping if needed for unstable process conditions ■ 4 free selectable O2 measuring ranges, incl. zero suppression, lowest span 1% ■ Manual, automatic or remote range control ■ User friendly menu control corresponding to NAMUR recommendations ■ Isolated output signal 0/4-20mA ■ 4 configurable MIN. or MAX. oxygen level alarms ■ 4 free configurable isolated binary inputs, for example: alarm confirmation, measuring range control, autocal. start ■ Process pressure measuring and compensation ■ Analogue signal memory during adjusting and calibration ■ Manual / automatic calibration ■ 3 code levels, access to 2 code levels only with release code ■ Interface RS 232 type ■ Flow alarm monitoring ■ 4 free configurable potential free relay contact outputs, for example: oxygen level alarm ■ option: interface RS 485 type Technical specifications and illustrations are without obligation, subject to modifications.05.97/01.07 Application Due to the extremely fast response time of the patented M&C magneto-dynamic measuring cell with no stagnant volume as well as the negligible cross sensitivity from other sample gas components, the M&C oxygen-analyser PMA 100 has a wide variety of applications. The analyser is a suitable and reliable instrument for monitoring oxygen concentrations in various gas analytical process control applications including flue gas measurements, inert gas installations, fermentation processes and laboratory process control installations. Description The M&C oxygen analyser PMA 100 is a temperature controlled instrument which has been designed for continuous measurements of oxygen concentrations in particle-free and dry sample gas. The PMA 100 is a reliable and easy-to-operate instrument. It is built into a housing for 19 inch rack mounting / table version. The transducer unit maintains a constant operating temperature of 55 °C. The programmable measuring ranges are displayed on the LCD display. Sample gas connections as well as connectors for incoming power supply and all output/input signals are located at the rear side of the analyser. The sample gas enters the analyser via an external protective fine-filter. The required flow rate can be adjusted at the flow meter with needle valve, mounted on the front panel upstream the M&C measuring cell and the flow chamber with flow alarm sensor and also with process pressure sensor. The internal tubing is made of PTFE and PVDF. The PMA 100 has got nearly the same design as the PMA 100-L. There are only a few differences: the PMA100 is aditionnally equipped with a pressure sensor, i.e. a pressure compensation. Furthermore, there is an interface type RS 232 and the possibility to drive 3 external solenoid valves for an automatic calibration. Measuring principle of M&C oxygen analyser The PMA 100 utilises the paramagnetic principle of operation to measure oxygen concentration. 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 propertys 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. 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

Gas flow diagram PMA 100 1. External fine filter 2. Flowmeter with needle valve 3. Oxygen measuring cell PMA 4. Flow alarm sensor and process pressure sensor Dimensions Side view Front view Select Enter 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 specifications and illustrations are without obligation, subject to modifications. 05

Technical Data 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 specifications and illustrations are without obligation, subject to modifications. 05.97/01.07 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-