M&C PMA Series Instruction Manual
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Summary of Contents for M&C PMA Series
- Page 1 Oxygen – Analyser Series PMA ® PMA 20 Instruction Manual Version 1.00.01...
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Page 2: Table Of Contents
Content General information ........................4 Declaration of conformity ......................4 Safety instructions ........................5 Warranty ............................5 Used terms and signal indications .................... 6 Introduction ..........................7 Serial number ....................... 7 Application ..........................7 Technical data ..........................8 Description ..........................9 Front panel ......................... - Page 3 Dear customer, we have made up this operating manual in such a way that all necessary information about the product can be found and understood quickly and easily. Should you still have any question, please do not hesitate to contact M&C directly or go through your appointed dealer.
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Page 4: General Information
HEAD OFFICE M&C TechGroup Germany GmbH Rehhecke 79 40885 Ratingen Germany Telephone: 02102 / 935 – 0 Fax: 02102 / 935 – 111 E - mail: info@mc-techgroup.com www.mc-techgroup.com GENERAL INFORMATION The product described in this operating manual has been examined before delivery and left our works in perfect condition related to safety regulations. -
Page 5: Safety Instructions
SAFETY INSTRUCTIONS Please take care of the following basic safety procedures when mounting, starting up or operating this equipment: Read this operating manual before starting up and use of the equipment. The information and warnings given in this operating manual must be heeded. Any work on electrical equipment is only to be carried out by trained specialists as per the regula- tions currently in force. -
Page 6: Used Terms And Signal Indications
USED TERMS AND SIGNAL INDICATIONS This means that death, severe physical injuries and/or important ma- terial damages will occur in case the respective safety measures are not fulfilled. D AN G E R ! This means that death, severe physical injuries and/or important material damages may occur in case the respective safety measures are not fulfilled. -
Page 7: Introduction
INTRODUCTION The M&C oxygen analyser PMA 20 is a temperature controlled instrument which has been de- signed for continuous measurements of oxygen concentrations in particlefree and dry sample gas. SERIAL NUMBER The type plate with the serial number is in the lid of the analyser. Whenever you call M&C regarding questions or orders for the spares please give us the serial number of your PMA 20. -
Page 8: Technical Data
TECHNICAL DATA Version PMA 20 Oxygen analyser Series PMA Part No. 02A1000 = 230V 50Hz, 02A1000a = 115V 60Hz Measuring ranges selectable for 0-3, 0-10, 0-30 and 0-100 vol.% O , linear Indication analogue meter with a scale of 0-30 and 0-100% for each selected range analogue meter with a scale of 0-30 and 0-100% for each selected range, digital meter, 3 1/2 digit 9 mm high... -
Page 9: Description
DESCRIPTION The PMA 20 is a reliable and easy-to-operate instrument. It is built into a compact wall mounting housing. The transducer unit maintains a constant operating temperature of 50 °C and a flashing LED on the control panel indicates the proper operating temperature of the analyser. The four measuring ranges are displayed on the analogue meter with 30/ 100% scale. -
Page 10: Front Panel
FRONT PANEL Analog indication Flow meter Zero potentiometer Needle valve 7 - 70 Nl/hr Span potentiometer Measuring range selector switch LED - heating control Figure 2 Front panel PMA20 GAS FLOW DIAGRAM OF THE ANALYSER PMA 20 Fine filter Measuring cell ... -
Page 11: The Measuring Principle
THE MEASURING PRINCIPLE Oxygen is a gas with a significant paramagnetic susceptibility. The molecules of oxygen are at- tracted much more strongly by a magnetic field than the molecules of other gases. The measuring principle shown in the following is benefitting from these characteristics of the ox- ygen. -
Page 12: Receipt Of Goods And Storage
Every change of the oxygen concentration produces a lineary proportional change of the compen- as oxygen value on the display . sation current and can be read directly in % O Due to its very small stagnant volume (2 cm ) and the direct flow of the M&C measuring cell, an extremely fast response time (T -time) of 1 second for a high gas flow can be realized. -
Page 13: Connection Of Sample Gas Inlet And Sample Gas Outlet
12.1 CONNECTION OF SAMPLE GAS INLET AND SAMPLE GAS OUTLET The sample gas inlet and outlet are placed at the bottom side of the analyser and have tube con- nections DN4/6mm. Connect the sample gas inlet (rear connection) with a corresponding gas conditioning with e.g. -
Page 14: Electrical Connection
ELECTRICAL CONNECTION The electrical connection is done at the terminals in the connection box below the analyser: Loosen the two screws of the lid end remove it. False supply voltage can damage the equipment. When connect- C AU T I O N ! ing the equipment, please ensure that the supply voltage is iden- tical with the information provided on the model type plate! Power... -
Page 15: Calibration
After approximately 30 min. the LED in the indication instrument starts flashing. After 12 hours the transmitter has reached a temperature balance and the analyser is ready for cal- ibration. CALIBRATION The accuracy of an analyser mainly is dependent on its calibration. Before calibration it has to be assured that the calibration conditions cor- respond to the conditions during measurement. - Page 16 Check output signals at 0,0% O Output signal Measurement 0-1 V 0-20 mA 0 mA 4-20 mA 4 mA If a gas mixture is analysed, the single gas components have to be checked concerning potential cross sensitivity and regarded for zero calibration. (see chapter 16.1.1 and 16.1.2).
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Page 17: Cross Sensitivities
16.1.1 CROSS SENSITIVITIES The following table shows the cross sensitivities of the most important gases at 20°C and 50°C. All values are based on a zero calibration with N and a span calibration with 100 Vol.% O . The deviations are each valid for 100 Vol.% of the respective gas. Molecular formula 20°C 50°C... -
Page 18: Consideration Of Cross Sensitivities
16.1.2 CONSIDERATION OF CROSS SENSITIVITIES The selectivity of the above mentioned measuring principle is based on the high susceptibility of oxygen to other gases (see table). The following examples shall show how cross sensitivities can be considered for the zero calibra- tion. -
Page 19: Span Calibration
The correction factor is calculated as follows: Correction factor (100 – O -concentration) It is incidental: = 1,0526 (100 – 5) For the gas mixture the rectified sum cross sensitivity then is calculated in good approximation : 1,0526 x -0,1123 Vol.% = -0,1182 Vol.% The rectified sum cross sensitivity with change of sign now can be used for the correction of the zero calibration. - Page 20 Connect the hose end of the instrument air or check gas bottle connection to the gas inlet of the analyser. Open the pressure reducer valve slowly, to avoid pressure peaks. Adjust the flow rate to 50 Nl/hr at the flow meter. Always calibrate at the flow rate that is adjusted for the measurement too.
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Page 21: Measuring
MEASURING For the first starting up at a new location, all steps in chapter 16 and 17 have to be performed. By the requirements of precision the interval of the new calibration can be carried out daily or weekly. The sample gas must be free from all liquid or solid particles, i.e. the dew C A U T I O N ! point of the gas has to be below the equipment temperature so that no condensate will occur inside the equipment. -
Page 22: Spare Parts List
SPARE PARTS LIST Wear, tear and replacement part requirements depend on specific operating conditions. The recommended quantities are based on experience and they are not binding. Oxygen analyser PMA 20 (C) Consumable parts (R) Recommended spare parts (S) Spare parts Recommended quantity being in operation [years] C/R/S... -
Page 23: Figure 7 Circuit Diagram Pma 20
Figure 7 Circuit diagram PMA 20 www.mc-techgroup.com PMA20 | 1.00.01... -
Page 24: Figure 8 Circuit Diagram Oxygen Transducer Unit Pma1.02.0
Figure 8 Circuit diagram oxygen transducer unit PMA1.02.0 PMA20 | 1.00.01 www.mc-techgroup.com... -
Page 25: Figure 9 Components List Circuit Diagram Pma1.02.0
Figure 9 Components list circuit diagram PMA1.02.0 www.mc-techgroup.com PMA20 | 1.00.01... -
Page 26: Figure 10 Components List Circuit Diagram Pma1.02.0
Figure 10 Components list circuit diagram PMA1.02.0 PMA20 | 1.00.01 www.mc-techgroup.com... -
Page 27: Figure 11 Temperature Sensor Resistance Dependent On Temperature
Figure 11 Temperature sensor resistance dependent on temperature www.mc-techgroup.com PMA20 | 1.00.01... -
Page 28: Figure 12 Installation Provisions And Spare Parts Positions
Figure 12 Installation provisions and spare parts positions PMA20 | 1.00.01 www.mc-techgroup.com...