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PZA-MC25_1620-17485-0002-E-0821
Instruction manual
PZA-MC25 electronics unit
EC Declaration of Conformity for PZA series oxygen measurement and control device
This device is designed for industrial use in accordance with:
EN 50081-2
EN 50082-2
It complies with the following directives:
EMC Directive: 2004/108/EC
Low Voltage Directive: 2006/95/EC
Machinery Directive: 2006/42/EC
The device meets the following standards:
EN 61010-1
EN 50081-2
EN 50082-2
Description of the measures taken to ensure conformity:
Quality management system DIN EN ISO 9001:2008, No. 12 100 27736 TMS
This declaration shall cease to be valid if changes are made without our consent.
*** Version 1.1 ***
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Summary of Contents for Angst+Pfister PZA Series
- Page 1 PZA-MC25_1620-17485-0002-E-0821 Instruction manual PZA-MC25 electronics unit EC Declaration of Conformity for PZA series oxygen measurement and control device This device is designed for industrial use in accordance with: EN 50081-2 EN 50082-2 It complies with the following directives: EMC Directive: 2004/108/EC...
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Page 2: Table Of Contents
PZA-MC25_1620-17485-0002-E-0821 Contents Configuration ......9 Safety instructions ....... 4 Correcting readings ....... 9 Preface .......... 5 Setting the limit value ....9 Introduction ......... 6 Practical tip ......... 10 Defining the analogue outputs ..10 Measuring principle ....... 6 Measuring module ......7 Interfaces ........ -
Page 3: Safety Instructions
PZA-MC25_1620-17485-0002-E-0821 Safety instructions Please read this instruction manual carefully before installing the sensor & module and using it for the first time. Improper use will void any warranty! The correct function and operational safety of the module are guaranteed only under the environmental conditions specified in the ‘Technical data’... -
Page 4: Preface
PZA-MC25_1620-17485-0002-E-0821 Preface The measuring module is designed to record the partial pressure of oxygen in a gas atmosphere in conjunction with an oxygen sensor. Sensors of this kind work at high temperatures. Precautions should therefore be taken to prevent flammable gas mixtures reaching the sensor or the device. -
Page 5: Introduction
PZA-MC25_1620-17485-0002-E-0821 Introduction Measuring principle Oxygen measuring devices are designed to process signals transmitted by an oxygen sensor made from stabilised zirconia. Zirconia, a ceramic material that is also referred to as a solid state electrolyte, acts as an excellent oxygen ion conductor at high temperatures. Within certain temperature limits that depend on the doping of the material, ion conductors of this kind are able to fill empty spaces in their crystal lattice with oxygen ions. -
Page 6: Measuring Module
PZA-MC25_1620-17485-0002-E-0821 Measuring module The PZA series measuring module features the following functions: Measurement of the partial pressure of oxygen in conjunction with a separate Series A sensor. Select the PZA-MC25-N variant for diffusion-based measurements and the PZA-MC25-P variant for flow-based measurements (see separate instruction manual for... -
Page 7: General Design
PZA-MC25_1620-17485-0002-E-0821 General design Description of the measurement electronics The front of the unit is divided into different areas: the LED display, the sensor connector and the terminal strip. Starting up the device Switching on the measuring module The wiring of the measuring module is indicated in the circuit diagram. As soon as the power is switched on, the module is ready to start. -
Page 8: Output Of Readings
PZA-MC25_1620-17485-0002-E-0821 Output of readings The measuring module output the reading in a linear format. The default setting is 0-25% O ‘linear’ at 4-20 mA. Another measuring range (0-1000 ppm O ) can be activated using a terminal connection jumper. You can switch measuring ranges automatically via a potential- free contact. -
Page 9: Practical Tip
PZA-MC25_1620-17485-0002-E-0821 Practical tip It is often the case that the mA signal is not displayed within comfortable viewing distance of the measuring module. We therefore suggest that you temporarily remove the connections from the ‘-mA’ and ‘+mA’ terminals and connect up a standard portable mA multimeter instead. -
Page 10: Interfaces
PZA-MC25_1620-17485-0002-E-0821 Interfaces Analogue interfaces There is one 4-20 mA analogue interface. Digital interfaces Semiconductor relay for combined alarm App for Android smartphones The app allows you to view readings and change configuration settings. First, the measuring module and the smartphone have to be paired via Bluetooth. We recommend how to do this below. - Page 11 PZA-MC25_1620-17485-0002-E-0821 3. Following pairing, the app can be activated on the smartphone. 4. Select the Bluetooth module. The app now launches. To open a message, click on the icon shown on the right.
- Page 12 PZA-MC25_1620-17485-0002-E-0821 5. The following display opens. 6. After clicking on ‘Connect’, you will be prompted to choose a device. 7. Select the correct device.
- Page 13 PZA-MC25_1620-17485-0002-E-0821 8. Communication begins after a few seconds and all of the parameters are transferred. 9. The app display shows the current values for Reference Point, Operating Point and Limit Value. You CANNOT make any changes here. The ‘BT’ LED on the device lights up in green. 10.
- Page 14 PZA-MC25_1620-17485-0002-E-0821 Then press ‘Remote enable’. 11. After entering the PIN ‘5678’, parameter changes are enabled.
- Page 15 PZA-MC25_1620-17485-0002-E-0821 12. The following display appears: The display is now much more brightly lit. ATTENTION! The Reference Point, Operating Point, and Limit Value can now be adjusted. Changing the ‘Reference Point’ and ‘Operating Point’ affects the reading currently displayed and the reading output. We recommend that you read the ‘Input explained’...
- Page 16 PZA-MC25_1620-17485-0002-E-0821 If you now select ‘Settings’, a menu appears: Details of what the various items in this list mean can be found in the ‘Input explained’ section.
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Page 17: Input Explained
PZA-MC25_1620-17485-0002-E-0821 Input explained Menu Explanation Action Current oxygen reading Cannot be changed Current temperature reading Cannot be changed Correction for air flushing Can be changed Sensor must be at operating temperature and flushed with clean air. The value is corrected until menu item 9 shows zero millivolts Correction for test gas Can be changed Sensor must be at operating temperature and flushed with test gas. -
Page 18: Terminal Connections
PZA-MC25_1620-17485-0002-E-0821 Terminal connections Terminal Designation Explanation 24 VDC + 24 VDC Power 0 VDC - (GND) Power Reading output + - mA Reading output - Alarm Alarm relay Combined alarm Alarm Alarm relay Combined alarm Switch Jumper to Switch terminal Switch measuring range 1 to measuring range 2 Switch Jumper to Switch terminal... -
Page 19: Technical Data
PZA-MC25_1620-17485-0002-E-0821 Technical data Measuring range 25% to 1 ppm O Ambient temperature 0 to 45 degrees Celsius Accuracy +/- 0.3 mV of the sensor EMF +/- 2 degrees Celsius +/- 2% of mA output +/- 2% of the log partial pressure of oxygen Dimensions approx. - Page 20 Office Germany: Headquarter Switzerland: Angst+Pfister Sensors and Power Angst+Pfister Sensors and Power AG Deutschland GmbH Edisonstraße 16 Thurgauerstrasse 66 CH-8050 Zurich D-85716 Unterschleißheim Phone +49 89 374 288 87 0 Phone +41 44 877 35 00 sensorsandpower@angst-pfister.com sensorsandpower.de@angst-pfister.com We are here for you. Addresses and Contacts.
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