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PMA 50 EX | 1.01.04

33

23.1

REMOVAL OF THE MEASURING CELL

Figure 7 shows a drawing of the internal analyzer design

PMA 50 EX

.

1

Electrical connections

6

Sample

gas

outlet

2

Transmitter type 1.07.X.

7

Flexible

tube

3

Hex screws

8

Sample gas inlet

4

Flow sensor, stainless steel

9

Front controller board

5

Union nuts sample gas inlet and outlet

10

Power supply and temperature board

Figure 7

Drawing of the internal analyzer design

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Summary of Contents for 1803436

Page 1: ...Oxygen Analyzer Series PMA PMA 50 EX Effective from March 2018 Serial No 1803436 Instruction Manual Version 1 01 04 ...

Page 2: ...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 our products in German and English This instruction manual does not claim completeness and may be subject to technical modifications 04 2022 ...

Page 3: ...1 2 PMA 50 Ex P PD with pressure compensation without SIL certification 15 11 3 Option zero suppression without SIL certification 15 11 4 Option enclosure purging or enclosure ventilation 15 12 Measuring principle 15 13 Gas flow diagram 17 14 Receipt of goods 19 15 Installation 19 16 Supply connections 20 16 1 Sample gas inlet and sample gas outlet 20 16 2 Option purging enclosure or enclosure ven...

Page 4: ...Assembly front board PMA50 EX 42 Figure 12 Circuit diagram mains adapter PMA50 EX 43 Figure 13 Assembly connection mains adapter PMA50 EX 44 Figure 14 Cut out magnification front board for adjustment of temperature alarm TP10 P19 TP11 current temperature und flow alarm threshold P20 45 Figure 15 Cut out magnification front board couple sensor bridge for application of a transmitter without couple ...

Page 5: ... in this instruc tion manual 2 DECLARATION OF CONFORMITY CE Certification The product described in this instruction manual complies with the following EU directives ATEX Directive The product described in this manual is produced in accordance with the EU directive for devices and protection systems for appropriate use in hazardous areas 2014 34 EU appendix II RoHS Directive The requirements of the...

Page 6: ...cal equipment is only to be carried out by trained specialists as per the regulations currently in force Attention must be paid to the requirements of VDE 0100 when setting high power electrical units with nominal voltages of up to 1000 V together with the associated standards and stipulations For use in hazardous area observe the relevant national and international instructions and regula tions C...

Page 7: ... to 21 by volume Higher oxygen concentrations are not covered by the ATEX directive The analyzer has been certified through IBExU authorized company for official approval of electric equipment in the Netherlands Detailed information and a copy of the certificate are attached to this instruction manual Installation and operation of the analyzer has to be done corresponding to the conditions in the ...

Page 8: ...ty measures are not fulfilled Caution This means that minor physical injuries may occur in case the respective safety measures are not fulfilled Caution Without the warning triangle means that a material damage may occur in case the respective safety measures are not met Attention This means that an unintentional situation or an unintentional status may oc cur in case the respective note is not re...

Page 9: ...in and eyes Hot surface Contact may cause burn Do not touch Wear protective gloves Working with chemicals sharp objects or extremely high temperatures re quires wearing protective gloves Wear safety glasses Protect your eyes while working with chemicals or sharp objects Wear safety glasses to avoid getting something in your eyes Wear protective clothes Working with chemicals sharp objects or extre...

Page 10: ...ximum dew point of 5 C 41 F The features of the analyzer are safe operation accuracy and low maintenance The measurement is based on the physical principle of the paramagnetic oxygen measuring cell and is one of the most exact quantitative methods of oxygen determination within the range of 0 100 vol oxygen There is a direct flow against the measuring cell which has got a low volume of only 2 ml s...

Page 11: ...ia potential free contacts max 30 V DC 3 mA DC The function is displayed at the PMA 50 EX via LED Combined analog digital indicator Analog meter with a scale of 0 30 and 0 100 for each selected range digital meter 4 digit 9 mm high LCD indicator for 0 100 O2 reading selectivity 0 01 vol O2 Output signals 0 4 20 mA burden 270 Ω for every measuring range electrically isolated output voltage max 15 V...

Page 12: ... white Dimensions H x W x D 475 535 mm with breathing and draining device x 355 x 200 mm 18 7 535 mm 21 1 with breathing and draining device x 14 x 7 9 Weight Approx 22 kg 48 5 lbs Certificate No IBExU 16 ATEX 1192 IECEx IBE 16 0041 10 1 OPTIONS Part number Options 05A9015 Zero suppression in range of 1 to 97 vol Only in connection with Part No 05A2500 a Externally switchable via potential free co...

Page 13: ...ler is designed in such a way that the low voltage section and the 230 V power section are separated via an opto coupler with zero voltage switch The large heating elements mounted on the transmitter surface guarantee a fast and even temperature dis tribution The non reversible overtemperature fuse prevents the transmitter from overheating above 72 C 161 6 F For better heat storage and insulation ...

Page 14: ...ntrol The function of the analyzer heating is indicated by LED 13 When the LED flashes the operating tem perature is reached The PMA50 EX has a collective status output as standard This is a potential free changeover contact in Safety First circuit The switching capacity is 200 mA at 48 A DC or 2 A at 250 V AC The status is indicated by the status LED 14 The following status messages are displayed...

Page 15: ...eathing and draining devices The required purge gas quan tity is 10 60 Nl h according to the set sample gas quantity and the purge gas inlet pressure is max 1 1 bar abs For increased inlet pressures from 1 1 bar to max 1 5 bar abs one breathing and draining device is also required in accordance with the Ex certificate see appendix To do this select the option with item no 05A9005 For increased inl...

Page 16: ...lecules are drawn into the magnetic field The field lines on the wedge shaped pole pieces 4 are com pressed and the nitrogen filled diamagnetic hollow spheres are forced out of the magnetic field This causes the dumbbell to rotate The rotation motion is detected by an optical system consisting of mirror 3 projection LED 5 and photocell 6 When the dumbbell is pushed out of the magnetic field the vo...

Page 17: ...fine filter 1 of at least 2 μm filter porosity eg type FP 2T The maximum gas flow of 60 Nl h can adjusted by an externally mounted flow meter 2 with a needle valve The sample gas enters the measuring cell 4 via the inlet breathing and draining device 3 A flow sensor 5 in the outlet of the measuring cell is controlling the gas flow through the cell according to the measuring principle of thermal co...

Page 18: ... 1 2 5 3 10 Sample gas outlet Sample gas Condensate I Atmospheric pressure II Overpressure Max 1 1 bar abs Max 1 1 bar abs 8 1 Gas cooler 7 Pressure display 2 Fine filter 8 Overflow valve 3 Flow meter 6 60 Nl h 9 Condensate pump 4 Sample gas pump 10 Analyzer PMA50 EX 5 Filter 11 Condensate removal 6 Pressure reduction Sample gas outlet 11 Figure 4 Gas conditioning ...

Page 19: ...g delivery and if necessary notify your transport insurance company without delay of any damage discovered Note The oxygen analyzer PMA50 EX must be stored in a weather protected and frost free area 15 INSTALLATION The PMA50 EX analyzer is designed for stationary wall mounting All electrical connecting options are located inside the connection box below the analyzer housing Figure 5 Dimensions for...

Page 20: ... the oxygen measurement The maximum inlet pressure is 1 1 bar abs For the standard device and 1 5 bar abs for devices with enclosure purging or enclosure ventilation The analyzer is suitable for use in explosive atmosphere group II category 2 Equipment with protection II 2G Ex db eb IIC T4 Gb see type plate is suitable to measure explosive gases of group II category 2 The oxygen analyzer PMA50 EX ...

Page 21: ...oyed by corrosion in the event of leaking gas paths Purge gas inlet and outlet or vent equipped with breathing and draining devices type MC95A with 1 4 NPT female connections 3 see Figure 1 are located on the top of the analyzer housing Dry air or nitrogen has to be used for purging the enclosure The purge gas flow rate has to be adjusted between 10 Nl h and 60 Nl h The purge gas inlet pressure is...

Page 22: ...ents of IEC 364 DIN VDE 0100 together with the associated standards and regulations and ElexV Main switch and corresponding fuse must be provided externally by the customer All electrical connections are located in inside the terminal box below the analyzer housing see appendix After loosening the cover screw connection the following terminal connections are freely accessible Figure 6 Electrical c...

Page 23: ...flashing of the heating control LED 13 see Figure 1 Note Calibrate the analyzer after starting up The temperature is stable after approx 3 hours Now the analyzer can be calibrated according to the following instructions To check how stable the status of the analyzer is start another calibration after 24 hours 18 CALIBRATION Before carrying out calibration work the plant and process specific safety...

Page 24: ...le connection to the external flow meter or if available to the external calibration valve Open the outlet valve of the pressure regulator slowly in order to avoid pressure peaks Adjust the zero gas volume flow with the needle valve of the flow meter to max 60 l h The volume flow of the calibration gas should always be adapted to the sample gas volume flow Note Always calibrate at the same gas flo...

Page 25: ...t pressure of max 1 1 bar abs This protects the measuring cell against destruction due to high pressure First open the bottle valve then open the closed output valve of the pressure regulator Purge the pressure regulator and the tubing for about 5 seconds Check adjusted control pressure and reduce to 1 1 bar abs if necessary then shut off the outlet valve of the pressure regulator again Connect th...

Page 26: ...ignal Signal to be measured with full scale value 30 100 0 20 mA 13 95 mA 4 19 mA 4 20 mA 15 16 mA 7 35 mA Note The mA signal depends on the set measuring range Therefore it is important to check the correctness of the selected measuring range Shut off the output valve of the pressure regulator and the bottle valve and disconnect the tube connec tion to the analyzer The full scale value calibratio...

Page 27: ... the analyzer is ready for measurement Danger The sample gas must be free of all components in liquid and solid form i e the dew point of the sample gas must always be considerably lower than the instru ment or ambient temperature so that condensation does not occur in the instru ment If necessary lower the dew point using a cooler or dryer For dust filtration connect a filter with 2 μm filtration...

Page 28: ...e glycol CH2OH 2 0 78 0 88 Ethylene oxide C2H4O2 0 54 0 60 Furan C4H4O 0 90 0 99 Helium He 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 sulfide H2S 0 41 0 43 Carbon dioxide CO2 0 27 0 29 Carbon monoxide CO 0 06 0 07 KryptonKr 0 49 0 54 Methane CH4 0 16 0 17 Methanol CH4O 0 27 0 31 Methylen chloride CH2Cl2 1 00 1 10 Methyl propene C4H8 0...

Page 29: ... the influence of cross sen sitivity can be eliminated without problem by using carbon dioxide CO2 instead of nitrogen for the zero calibration Example 2 Determination of the oxygen content of a gas mixture at 20 C 68 F 1 vol C2H6 Ethane 5 vol O2 40 vol CO2 54 vol N2 Zero point calibration with nitrogen N2 The cross sensitivity values of the table above are based on 100 vol of the respective gases...

Page 30: ...be used for correction during zero calibration In this example the zero point would have to be adjusted in good approximation to 0 12 vol Neglecting the cross sensitivities in this example would mean a relative error of approx 2 Note After zero calibration the full scale value has to be calibrated too If the full scale value is not calibrated with 100 vol oxygen a correction of the cross sensitivi...

Page 31: ...analyzer is to be shut down for a long period of time it is recommended to purge the analyzer with dry clean inert gas e g ambient air to avoid damage to the measuring cell due to aggressive and corrosive humid gases 22 STORAGE AND TRANSPORT Note The analyzer should be stored in a protected frost free area 23 MAINTENANCE Before carrying out any maintenance work the safety requirements specific to ...

Page 32: ...nts The preceding components necessary for the sample gas conditioning are to be maintained according to the respective instruction manuals The calibration of zero point and full scale value must be carried out with the corresponding test gases ac cording to the instructions Recommended interval of calibration for standard applications 1 x per week ...

Page 33: ...yzer design PMA 50 EX 1 Electrical connections 6 Sample gas outlet 2 Transmitter type 1 07 X 7 Flexible tube 3 Hex screws 8 Sample gas inlet 4 Flow sensor stainless steel 9 Front controller board 5 Union nuts sample gas inlet and outlet 10 Power supply and temperature board Figure 7 Drawing of the internal analyzer design ...

Page 34: ...ransmitter unit Warning Hot transmitter surface up to 55 C 131 F Touching may lead to burnings Wear safety gloves Loosen the threaded tube couplings 5 of the sample gas inlet and the sample gas outlet see Figure 7 Warning Strong magnetic field Before dismounting the transmitter unit remove all sensi ble parts eg wrist watch etc Pull off the green 2 3 and 4 pole plug in connections on terminal X1 X...

Page 35: ...als mark the cables accordingly Disconnect the tubing for the sample gas outlet and sample gas inlet Loosen the fastening screw of the measuring cell with a screw driver and pick carefully the cell Exchange only with measuring cells of the same type Turn the transmitter as shown in Figure 9 and loosen the fastening screw of the photocell Install the measuring cell in reverse order make sure the du...

Page 36: ...g display signalizes that the required operating temperature has been reached Set the potentiometer for zero point and full scale value in the middle position you can do this by turning the potentiometer with a screw driver fully to the left and then turn it five turns back to the right Charge the analyzer with a zero gas volume flow of approx 40 l h With a precise adjustment of the zero point the...

Page 37: ...A0020 Zero potentiometer span potentiometer 5K S 90A0079 Digital analog panel Typ PMA30 50 4 1 2 digit 9 mm high LCD indicator S 90A1002 Digital analog panel Typ PMA30 50 4 1 2 digit 18 mm high LCD indicator 90A0010 Measuring cell PMC 1 S 90A0009 Special measuring cell PMC 1 LB solvent resistent with O rings Kalrez S 90A0006 Special measuring cell with glass solder S 90A0035 Projection LED S 90A00...

Page 38: ... front board couple sensor bridge for application of a transmitter without couple sensor Cut out magnification front board for adjustment of reference voltage amplification and offset of the O2 signal Cut out magnification mains adapter for adjustment of the temperature current and voltage output Cut out magnification mains adapter for adjustment of burden and limitation of the current output Ex C...

Page 39: ...lure from a downstream device The SIL qualification is valid for all adjustable measuring ranges It applies for alarm of rising oxygen concen tration dangerous fault oxygen signal is to small as well as for alarm of decreasing oxygen concentration dangerous fault oxygen signal is too big For one channel and two channel operation of the oxygen analyzer PMA 50 EX the following parameters have been d...

Page 40: ...e measuring range If the measuring range is choosen externally it is mandatory nec essary to analyze the external measuring indication see Fig 5 The analyzer has to be maintained and calibrated regularly expertly according to the manufacturer s data The maintenance intervals for monitoring of inertization processes have to be specified according to leaflet BGI 518 of the Main Association of Trade ...

Page 41: ...www mc techgroup com PMA 50 EX 1 01 04 41 Figure 10 Circuit diagram front board PMA50 EX ...

Page 42: ...42 PMA 50 EX 1 01 04 www mc techgroup com Figure 11 Assembly front board PMA50 EX ...

Page 43: ...www mc techgroup com PMA 50 EX 1 01 04 43 Figure 12 Circuit diagram mains adapter PMA50 EX ...

Page 44: ...44 PMA 50 EX 1 01 04 www mc techgroup com Figure 13 Assembly connection mains adapter PMA50 EX ...

Page 45: ...out magnification front board couple sensor bridge for application of a transmitter without couple sensor Failure indication B15 Flow min failure B14 Transmitter LED current failure B11 Transmitter temperature max failure B12 Transmitter temperature min failure B13 Power supply UB failure B10 Power supply UB failure Couple sensor failure and failure range selector internal are not displayed optica...

Page 46: ...46 PMA 50 EX 1 01 04 www mc techgroup com Figure 16 Cut out magnification front board for adjustment of reference voltage amplification and offset of the O2 signal ...

Page 47: ... EX 1 01 04 47 Figure 17 Cut out magnification mains adapter for adjustment of the temperature current and voltage output Figure 18 Cut out magnification mains adapter for adjustment of burden and limitation of the current output ...

Page 48: ...48 PMA 50 EX 1 01 04 www mc techgroup com ...

Page 49: ...www mc techgroup com PMA 50 EX 1 01 04 49 ...

Page 50: ...50 PMA 50 EX 1 01 04 www mc techgroup com ...

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Page 52: ...52 PMA 50 EX 1 01 04 www mc techgroup com ...

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