Summary of Contents for M&C PMA 05
- Page 1 Manual Oxygen transmitter Model PMA 05 Gas sampling and gas conditioning technology 9-3.20-MD...
- Page 2 Dear Customer, We have organised this manual to enable you to find and understand all the necessary information about the product quickly and easily. If nevertheless you should still have questions regarding the product or its use, do not hesitate to contact us directly at M&C, or your local dealer.
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Page 3: Table Of Contents
Illustration1 Diagram of the measurement cell, and optical signal processing ......8 Illustration 2 Dimensions ........................ 9 Illustration 3 Electrical connections transmitter PMA 05 .............. 10 Illustration 4 Calibration ........................ 12 Illustration 5 Setting the mechanical zero point ................13 9-3.20-MD... -
Page 4: General Information
Headquarters M&C TechGroup Germany GmbHRehhecke 7940885 Ratingen,Germany Tel: 02102 / 935 - 0 Fax: 02102 / 935 - 111 E-mail: Info@mc-techgroup.com www.mc-techgroup.com GENERAL INFORMATION The product described in this guide has been supplied in a safe and tested condition. For safe operation and to maintain this condition, the information and instructions in this guide must be followed. -
Page 5: Terminology And Symbols Used
TERMINOLOGY AND SYMBOLS USED means that death, serious personal injury and/or substantial property damage will result if proper precautions are not taken. D A N G E R ! indicates that death, serious personal injury and/or substantial property damage might occur if proper precautions are not taken. W A R N I N G ! means that minor personal injury may result if proper precautions are not taken. -
Page 6: Description
DESCRIPTION M&C PMA 05 oxygen transmitters are suitable for continuous oxygen measurements in dry and particle-free gases. Due to the extremely fast response time, low stagnant volume, magneto-dynamic measuring cell with negligible cross-sensitivity to other sample gas components, M&C 05 PMA oxygen transmitters can be used in almost all applications. -
Page 7: Technical Specifications
TECHNICAL SPECIFICATIONS PMA05 MB10 PMA05 MB01 Part No. 01A0510 (lowest measuring range 01A0520 (lowest measuring range 0-10 vol.% O 0-1 vol.% O Measuring range 0-100 vol% O (standard), other 0-25 vol% O (standard), other measuring ranges according to measuring ranges according to client requirements client requirements Measurement output... -
Page 8: Measurement Method
MEASUREMENT METHOD Oxygen is a gas with strong paramagnetic properties. The molecules of the oxygen will be influenced more than that of most other gases by a magnetic field. The measuring method presented below takes advantage of these properties of oxygen. The great advantage of the paramagnetic measuring principle is the greatly reduced cross-sensitivity of measurement to the other components in the sample gas. -
Page 9: Assembly
Any change in the oxygen concentration causes a linearly proportional change in the on a display. compensation current and hence can be read directly as the oxygen value in % O Due to the very low stagnant volume (2 cm ) and the direct flow of the M&C measuring cell, an extremely fast response time (T time) of the measuring cell of 1 second can be achieved at a... -
Page 10: Pneumatic Connection
Illustration 3 Electrical connections transmitter PMA 05 The electrical connection of the M&C PMA 05 oxygen transmitter is via the 12-pin. plug Item 9 (Figure 3). This 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 for all versions with heating, in addition, these versions have a non-reversible thermal fuse 72 °C... -
Page 11: Commissioning
COMMISSIONING The following points must be taken into consideration on commissioning the M&C PMA 05 oxygen transmitter in conjunction with an oxygen analyser. Before switching on the device, check the electrical and pneumatic connections. The sample gas must be dust-free and dry in order to avoid... -
Page 12: Zero Point Calibration
12.1 ZERO POINT CALIBRATION Zero point calibration of the transmitter takes place with an O -free gas, such as nitrogen (N2) 5.0. Set the zero gas flow rate with a needle valve or flow metre to a maximum of 60 l/h. The flow rate of the calibration gas should always be adapted to the measurement-gas flow rate;... -
Page 13: Mechanical Zero Point Adjustment
12.1.1 MECHANICAL ZERO POINT ADJUSTMENT The mechanical zero point is set as follows: 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 indicated at the signal output;... -
Page 14: Interference Effects
12.1.2 INTERFERENCE EFFECTS The following list shows the cross-sensitivity of the major gases at 20 °C and 50 °C. All values are based on zero point calibration with N and end value calibration at 100% Vol. %O2. The deviations apply as appropriate for 100% Vol. of the corresponding gas. Formula 20°... -
Page 15: Consideration Of Cross-Sensitivities
12.1.3 CONSIDERATION OF CROSS-SENSITIVITIES The selectivity of the above-mentioned measurement method is based on the great susceptibility of oxygen to other gases (see table). The following examples are intended to show how cross-sensitivities can be taken into account in zero point calibration. Example 1: Determining the residual oxygen content in 100% carbon dioxide ) inert gas atmosphere at 20 °... -
Page 16: End Value Calibration
The correction factor is calculated: Correction factor (100 - O2 concentration) This results in the following correction factor: = 1.0526 (100 – 5) For the gas mixture, the corrected total interference is therefore calculated to a good approximation: 1.0526 x -0.1123 by volume% = -0.1182% Vol. -
Page 17: Cleaning
CLEANING In the event of external contamination, clean the transmitter only with a cloth dampened with soapy water. N O T I C E ! DECOMMISSIONING For long-term shutdown, it is recommended to flush the transmitter with a dry, inert gas such nitrogen, to prevent damage to the measuring cell by aggressive and corrosive humid gases.