M&C PMA 05 Скачать руководство пользователя страница 9

 

 

 

9-3.20-MD 

Gas sampling and gas conditioning technology 

Any  change  in  the  oxygen  concentration  causes  a  linearly  proportional  change  in  the 
compensation current and hence can be read directly as the oxygen value in % O

2

 

on a display.       

Due  to  the  very  low  stagnant  volume  (2  cm

3

)  and  the  direct  flow  of  the 

M&C

  measuring  cell,  an 

extremely  fast  response  time  (T

90

  time)  of  the  measuring  cell  of  1  second  can  be  achieved  at  a 

high gas flow rate.  
 
 
 

ASSEMBLY  

In the bottom panel of the transmitter four M4 holes are provided for mounting.  
 

A T T E N T I O N !

 

When  mounting,  ensure  that  no  mechanical  vibrations  can  be 
transmitted to the transmitter.  
Installation must be horizontal.

 

 
 

 

 
Illustration 2  Dimensions 

 

 
 

 

View from below. 
Mounting holes 

Item 

Item 

Содержание PMA 05

Страница 1: ...Gas sampling and gas conditioning technology 9 3 20 MD Manual Oxygen transmitter Model PMA 05...

Страница 2: ...ct addresses can be found in the appendix to this manual Please also consult our homepage www mc techgroup com for further information about our products There you will find the manuals and product da...

Страница 3: ...ning 11 12 Calibrate 11 12 1 Zero point calibration 12 12 1 1 Mechanical zero point adjustment 13 12 1 2 Interference effects 14 12 1 3 Consideration of cross sensitivities 15 12 2 End value calibrati...

Страница 4: ...when using the device Read the manual before operation and use of the equipment The instructions and warnings in the manual must be followed Work on electrical equipment may only be performed by quali...

Страница 5: ...precautions are not taken C A U T I O N without a warning triangle symbol indicates that property damage may result if proper measures are not taken A T T E N T I O N indicates that an undesirable re...

Страница 6: ...cations They are a suitable and reliable analyser unit for oxygen monitoring in different processes such as flue gas monitoring inerting systems fermentation processes process and laboratory measureme...

Страница 7: ...output 1 of span at range 3 100 digital indicator 0 1 vol O2 analogue signal output 2 of span at range 1 Sample gas outlet pressure the sample gas must flow without pressure out to atmosphere Influen...

Страница 8: ...dumbbell there is a small mirror The dumbbell is surrounded by a wire loop which is required for the compensation method The above system is fixed by a platinum strap rotationally symmetrical in a gl...

Страница 9: ...2 cm3 and the direct flow of the M C measuring cell an extremely fast response time T90 time of the measuring cell of 1 second can be achieved at a high gas flow rate 8 ASSEMBLY In the bottom panel o...

Страница 10: ...s is where the transmitter receives power and the measurement signal is transferred Terminal 11 12 Supply voltage 24V DC max 1 5 A for heating and transmitter Terminal 9 10 Temperature status contact...

Страница 11: ...ped with heating the measurement gas should be applied only after heating of the transmitter Temperature status contact closed 12 CALIBRATE Before performing calibrations the system and process specif...

Страница 12: ...e adapted to the measurement gas flow rate Wait for approx 30 seconds until the display has stabilised If necessary adjust the zero point with the zero point potentiometer to 0 4mA The zero point pote...

Страница 13: ...lows Assign zero gas as described in 13 1 Loosen fixing screw Item 4 of the photocell bracket Turn the adjustment screw Item 6 of the photocell clockwise or counter clockwise until 0 0 oxygen is indic...

Страница 14: ...2OH 2 0 78 0 88 Ethylene 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 sulphide H2S 0 41 0...

Страница 15: ...tmosphere consisting of CO2 and O2 the interference effect can be eliminated easily by using carbon dioxide CO2 for zero point calibration instead of nitrogen N2 Example 2 Determining the oxygen conte...

Страница 16: ...neglect of the cross sensitivity in this example would mean a relative error of about 2 NOTICE After zero point calibration the measuring range end value must always be calibrated 12 2 END VALUE CALI...

Страница 17: ...f external contamination clean the transmitter only with a cloth dampened with soapy water 14 DECOMMISSIONING For long term shutdown it is recommended to flush the transmitter with a dry inert gas suc...

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