Summary of Contents for METROTEC A19 Series
- Page 1 METROTEC S ys te ms f or oxygen meas u re men t Oxygen Sensor Type A19 *** Version 2.2 ***...
- Page 2 METROTEC Declaration of Conformity Oxygen sensor Type A19 series This unit is designed for industrial applications in accordance with EN 50081-2 EN 50082-2 The shipped version of this device complies with the requirements of the EEC norms: EMC directive: 2014/30/EU...
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Page 3: Table Of Contents
METROTEC Contents SAFETY INSTRUCTIONS .... 4 PREFACE ........5 INTRODUCTION ......6 Measurement principle ....6 Sensor ........7 Converter module ...... 8 ASSEMBLY ........8 Electrical ........8 Mechanical ........ 8 CUSTOM DESIGNS ..... 10 WIRING DIAGRAM ....10... -
Page 4: Safety Instructions
METROTEC Safety instructions Please read through this operating manual very carefully before installing and commissioning the unit. Incorrect utilisation will invalidate the guarantee! Correct functioning and the operating safety of the unit can only be guaranteed if the ambient conditions specified in the Specifications chapter are maintained. -
Page 5: Preface
METROTEC Preface With the aid of an oxygen sensor , the measurement unit serves to measure the oxygen partial pressure in gaseous atmospheres. Such sensors work at high temperatures and so it is necessary for measures to be taken to ensure that no flammable gas mixtures contact the sensor or the unit. -
Page 6: Introduction
METROTEC Introduction Measurement principle Oxygen measurement units are designed to process signals transmitted from an oxygen sensor constructed of stabilized zirconium oxide. Zirconium oxide, a ceramic material that is also spoken of as a solid-state electrolyte, acts as an excellent oxygen-ion conductor when at a high temperature. -
Page 7: Sensor
METROTEC Sensor Figure 1: Sensor A19-N The sensor is built into a stainless steel body, which has an aluminium housing with plug connection serving as the connection head. In principle the sensor can be mounted in any position. However, we recommend assemblies with the connection head positioned at the top. -
Page 8: Converter Module
METROTEC Converter module The sensor requires a series U or Z supply unit in order to function. Please refer to the unit's operating instructions for additional information. 4 Assembly Electrical Figure 2: Sensor head with connecting plug The electrical assembly is quite simple as the result of pre-assembled cables. The sensor is connected with the converter module. - Page 9 METROTEC Figure 3: Sensor A19-N with screw-in thread M27 x 2 mm In some situations it is beneficial to guide the sample gas out of the sample gas chamber. In such cases the sensor is built into a measuring chamber.
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Page 10: Custom Designs
METROTEC 3. A gas pump pushes or sucks the sample gases through the sensor. With all methods described, the flow through the sensor must be kept at around 50 litres per hour. Installing a gas flow meter and a needle valve in the gas pipes may be helpful and necessary. -
Page 11: Specifications
METROTEC 7 Specifications Sensor A19-N Measuring range 100 % up to 10 exp. -35 bar O2 Ambient temperature -10 to 80 degrees Celsius Max. sample gas temperature 200 degrees Celsius Measuring accuracy plus/minus 1 mV of the sensor's EMF Sensor heating-up time ca. - Page 12 METROTEC Sensor A19-P Measuring range 100 % up to 10 exp. -35 bar O2 Ambient temperature -10 to 80 degrees Celsius Max. sample gas temperature 200 degrees Celsius Measuring accuracy plus/minus 1 mV of the sensor's EMF Sensor heating-up time ca.
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Questions and answers
1: It is stated in the instruction that the sensor (A19-P) are maintained at a set temperature by an electronic temperature regulator,but it cannot indicate the temperature in real time .Can you provide the information about the set temperature. 2：Can an oxygen concentration sensor (A19-P) be used to measure the oxygen content in hydrogen? In this case, when 99.9% hydrogen is introduced, the sensor measurement shows 1000 mV. According to the formula in the manual, the calculated oxygen partial pressure is 2.09 exp -60. Obviously, this is an outrageous or erroneous value, so I would like to ask whether it cannot be used to measure the oxygen content in hydrogen, or if there is another calculation formula.