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M&C PMA Series, Instruction Manual

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M&C PMA Series Instruction Manual Download Page 23

 

www.mc-techgroup.com 

PMA45K1  |  1.00.01 

23

 

 

17 

MEASURING  

For the first starting up at a new location, all before mentioned steps have to be performed. 

The requirements of precision determine the interval of the new calibration. After having selected the 

desired measuring range, the analyzer is ready for measurement. 

 

 

 

NOTE!

 

The sample gas must be free from all liquid or solid particles, i.e. the dew 

point of the gas has to be below the ambient or instrument temperature 

so that no condensate will occur inside the instrument. If necessary, 

lower the dew point by means of a cooler or dryer. For dust filtration, use 

a filter with 2 micron porosity!  

 

 

We will be pleased to inform you about an optimal gas conditioning!  

 

 

 

18 

CLOSING DOWN  

In case the installation to be controlled is shut down for a short period, the analyzer should stay on 

stand-by. Not further actions are required.  

 

In case of a long term closing down, it is recommended to purge the analyzer with dry and clean inert 

gas (e.g. ambient air) in order to avoid a damage of the measuring cell due to aggressive or corrosive 

humid gases.  

 

 

 

19 

STORAGE  

 

NOTE!

 

 

The storage of the analyzer  should be effected in a protected 

frost-free room! 

 

 

 

 

20 

MAINTENANCE 

Before executing the maintenance works, the specific security measurements relating to the installa-

tion and the process have to be observed!  

 

 W A R N I N G !  

 

   

Dangerous tension. Before executing the maintenance works, the 

analyzer and all external electrical circuits in connection with the 

analyzer have to be switched off from tension.  

 

For use in explosive areas, the EX directives have imperatively to 

be observed!  

 

 

NOTE!

 

 

It is important to use only the original spare parts that correspond 

to the M&C specification! 

 

Summary of Contents for PMA Series

Page 1: ...Oxygen Analyzer Series PMA PMA 45K1 Instruction Manual Version 1 00 01 ...

Page 2: ...don t hesitate to contact M C or your M C authorized distributor You will find all the addresses in the appendix of this manual For additional information about our products and our company please go to M C s website www mc techgroup com There you will find the data sheets and manuals of all our products in German and English This Operating Manual does not claim completeness and may be sub ject to...

Page 3: ...trical connection 14 14 3 Determination of the two measuring ranges to be selected on the instrument 15 15 Starting up 16 16 Calibration 17 16 1 Zero point adjustment 17 16 1 1 Cross sensitivities 19 16 1 2 Consideration of cross sensitivities 20 16 2 Sensitivity adjustment 21 17 Measuring 23 18 Closing down 23 19 Storage 23 20 Maintenance 23 21 Annexe 24 List of Illustrations Figure 1 Dimensions ...

Page 4: ...installation and maintenance work All necessary information a skilled staff will need for appropriate use of this product are given in this operating manual 2 DECLARATION OF CONFORMITY CE Certification The product described in this operating manual complies with the following EU directives RoHS Directive The requirements of the RoHS2 Restriction of Hazardous Substances 2 directive 2011 65 EU and i...

Page 5: ...Before opening the equipment it must be switched off and hold no voltages This also applies to any external control circuits that are connected The device is only to be used within the permitted range of temperatures and pressures The device must not be used in hazardous areas Check that the location is weather protected It should not be subject to either direct rain or moisture Installation maint...

Page 6: ...e spective safety measures are not fulfilled C AU T I O N Without the warning triangle means that a material damage may occur in case the respective safety measures are not met AT T E N T I O N This means that an unintentional situation or an unintentional status may occur in case the respective note is not respected NOTE These are important information about the product or parts of the operating ...

Page 7: ... inlet dew point of the gas must not exceed 40 C The features of the analyzer are operation reliability preciseness stability of the measurement and a small need of maintenance The measurement is based on the physical magneto dynamic measuring principle and is one of the most precise methods to determine the volumetric content of oxygen in the gas phase within the measuring range of 0 100 vol O2 T...

Page 8: ...uence up to 50 C Influence of barometric or outlet pres sure The O2 indication varies proportionally to the barometric or outlet pressure Influence of the sample gas quantity Variation between 0 60Nl h air will cause a change of indication 0 2 vol O2 Sample gas quantity Max 60 Nl h Flow alarm Thermal conductivity sensor in measuring cell outlet Pressure resistance Operating pressure max 0 6 bar ac...

Page 9: ...16 bar as well as a guaranteed leak tightness with a leak rate of less than 10 6 mbar x l s The transmitter is set to a temperature of 55 C The temperature regulator is constructed such as the low voltage device and the 115 230 V power part are separated via an opto isolator with no volt age switch A non reversible overpressure fuse avoids that the transmitter is overheated above 72 C The great su...

Page 10: ...rument 2 Here the oxygen value is shown within a range of 0 100 00 vol with a definition of 0 01 vol The measuring range switch over is made via the selector switch 4 The selected measuring range is indicated via a respective LED 11 on the front plate of the PMA 45K1 The selection of the measuring range can also be effected externally The LED 12 on the front plate of the analyzer in connection wit...

Page 11: ...zer housing Sample gas inlet 8 and outlet 9 with NPT i thread are also placed on the bottom side of the hous ing 10 MEASURING PRINCIPLE Oxygen is a gas with a significant paramagnetic susceptibility The molecules of oxygen are attracted 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 o...

Page 12: ...tion is detected via an optical system consisting of mirror projection LED and photoelectric cell In case the dumbbell is pushed out of the magnetic field the tension of the photoelectric cell is imme diately changed The measuring amplifiers and are producing a respective current which devel ops via the wire coil on the dumbbell an electro magnetic load moment The load moment is resetting the dumb...

Page 13: ...mounting All electrical connections are to be found inside the analyzer housing The correct installation as well as an optimal sample gas conditioning unit mounted upstream if nec essary with an appropriate gas sample probe guarantee a long lasting functioning and a minimum of maintenance CAUTION In case of outdoor operation the analyzer must be protected against sun wind and rain At the installat...

Page 14: ...ICAL CONNECTION W AR N I N G False supply voltage can damage the equipment When connect ing the equipment please ensure that the supply voltage is iden tical with the information provided on the model type plate Take care that the instrument hat got a sufficient connection to earth NOTE Attention must be paid to the requirements of IEC 364 DIN VDE 0100 when setting high power electrical units with...

Page 15: ... may then be selected via a switch on the instrument The selection of measuring range 1 and 2 is made via two jumpers on the below illustrated plate On the photo you can see that for range 1 the 1 measuring range has been selected and for range 2 the 2 5 measuring range The selected measuring ranges refer only to the mA outlet The digital indication is always in the 100 00 vol O2 measuring range V...

Page 16: ...zer shows an oxygen value 21 vol due to the ambi ent air inside the measuring cell The warming up time of the analyzer is indicated by the permanently illuminated temperature con trol LED on the front plate 7 see figure 2 After approximately 30 minutes the PMA 45K1 has achieved its transmitter temperature This is signalized by the twinkling of the temperature control LED NOTE A stable temperature ...

Page 17: ...ration with a respective test gas 16 1 ZERO POINT ADJUSTMENT Connect a flexible PVC or Viton tube with the pressure reducer of the N2 zero gas bottle The pressure reducer should have got an output range of adjustment of max 0 1 5 bar Open the cylinder valve first and then open the closed output valve of the pressure con troller Purge the pressure controller including the tubes for approx 5 seconds...

Page 18: ...sitivities and these have to be con sidered during the zero point calibration see chapter 16 1 1 and 16 1 2 Close the pressure controller output valve and the cylinder valve Remove the tube connection from the analyzer The zero point calibration is finished NOTE After the zero point calibration also the final value has to be calibrated again ...

Page 19: ...0 78 0 88 Ethylene oxide C2H4O2 0 54 0 60 Furan C4H4O 0 90 0 99 HeliumHe 0 29 0 32 n Hexane C6H14 1 78 1 97 Hydrogen chloride HCL 0 31 0 34 Hydrogen fluoride HF 0 12 0 14 Hydrogen sulphide H2S 0 41 0 43 Carbon dioxide CO2 0 27 0 29 Carbon monoxide CO 0 06 0 07 Krypton Kr 0 49 0 54 Methane CH4 0 16 0 17 Methanol CH4O 0 27 0 31 Methylen chloride CH2Cl2 1 00 1 10 Methyl propylene C4H8 0 94 1 06 Monos...

Page 20: ...eason the influence of cross sensitivity can be eliminated without problem by using carbon dioxide CO2 instead of nitrogen N2 for the zero calibration Example 2 Determination of the oxygen content of a gas mixture at 20 C 1 vol C2H6 Ethan 5 vol O2 40 vol CO2 54 vol N2 Zero point calibration with nitrogen N2 The cross sensitivity values of above table are based on 100 vol of the respective gases Th...

Page 21: ...Place the span selector switch to the measuring range in which the sensitivity calibration shall be effected It is recommended to make a calibration with dry and clean air in the range of 25 Place selector switch 4 see figure 2 Connect a flexible PVC or Viton tube with ambient air or instrumental air or if applicable with a pressure reducer of the test gas bottle The pressure reducer shall have an...

Page 22: ...nection on the analyzer Determination of the signal value Se Snp V or mA x gas concentration Vol O2 Measuring range final value Vol O2 Se Final value signal output Snp Zero point signal output Shut the pressure regulator output valve and the bottle valve Remove the tube connection on the analyzer The sensitivity calibration is finished NOTE If during the sensitivity calibration great deviations ha...

Page 23: ...o be controlled is shut down for a short period the analyzer should stay on stand by Not further actions are required In case of a long term closing down it is recommended to purge the analyzer with dry and clean inert gas e g ambient air in order to avoid a damage of the measuring cell due to aggressive or corrosive humid gases 19 STORAGE NOTE The storage of the analyzer should be effected in a p...

Page 24: ...equired The preceding components of the sample gas conditioning unit are to be maintained according to the respective operating manuals The calibration of zero point and measuring range final value are to be executed with the respective test gases according to description 21 ANNEXE Further product information is available on our internet catalogue www mc techgroup com ...

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