ZrO2-III type zirconia oxygen analyzer manual 
 First, an overview 
 Zirconia oxygen flue gas analyzer in recent decades developed a new oxygen measuring instrument because of its simple structure, maintenance, fast response, wide measurement range, widely used in electric power, metallurgy, heating building materials, electronics and other departments, analysis of the flue gas oxygen content in a variety of industrial boilers and furnaces, to improve combustion efficiency, energy conservation, reduce environmental pollution. 
 ZrO2-III zirconia oxygen analyzer converter and detector (commonly known as the oxygen probe), composed of zirconia concentration cell of the core components of the detector, the use of nano materials and advanced production technology, in the electrode coating Add inhibition of electrode aging additives. Greatly improving the accuracy and service life of the zirconia probe. Detector using a line probe structure without sampling system can timely reflect the status of the boiler combustion, such as used in conjunction with the controlled device, which can effectively control the combustion conditions. Converter using a single-chip intelligent design, the Chinese character LCD data display, function controls more humane; connection with various types of DCS data access device. The operation of the instrument is simple, easy to grasp. Has the following characteristics: 
 ?? More versatility can be a direct replacement for other manufacturers of oxygen analyzer. 
 2 big screen blue and white LCD display. 
 ?? All Chinese operation menu (exports can provide English menu). 
 ?? Oxygen range of 0-25% is free to set (the lowest range 0-5%). 
 Temperature using PID temperature control, heated point of 700 ° C and 750 ° C (site selection). 
 ?? Can set the oxygen on the lower limit of the alarm indication on the temperature, the lower limit alarm indicator. 
 ?? Background potential a key correction. 
 ?? Available standard gas-line calibration. 
 ?? 4-20mA standard current output and optical isolation of the main circuit, can be directly Far EasTone into the DCS system. 
 ?? 10. A variety of failure message. 
 Second, the principle 
 Zirconia is a high-temperature electrolyte concentration cell, the number of Baidu's high temperature environment, with 
 Produce the conductive properties of the migration of oxygen ions, the measured gas (flue gas or other gases) and the reference gas 
 Body (air or other gases) in the partial pressure of oxygen in zirconia on both sides of the platinum electrode, between the poles of a 
 Given amount of oxygen ion mobility arising from the oxygen concentration potential, its potential value and oxygen concentration in the relationship, 
 Nernst (the Nernst) formula: 
 E = RT/4F × LnP1/P2 
 Where: E-oxygen concentration potential (V) 
 R-ideal gas constant (8.314J/moLK) 
 T-absolute temperature (K) 
 F-Faraday constant (96500c/moL) 
 P1-reference gas pressure (air) 
 P2-measured gas partial pressure 
 Transmitter to the measured data, calculated by the microcontroller conversion, the oxygen content is displayed on the LCD screen, and convert the current signal for the computer or account loggers. 
 700 ° C and 750 ° C when the oxygen concentration and the potential relationship of the oxygen concentration Annex. 
 Third, technical indicators 
 ?? Range: 0.01 to 25.0% O2 (range from 5.00% -25.00% ** set) 
 Output signal: 4 ~ 20mA load resistance ≤ 500Ω isolation 
 Repeatability: ± 0.5% of full scale 
 The basic error: ≤ ± 2% (full scale) 
 Stability: ≤ ± 1% (continuous test of the instrument 4h) 
 Response time: in the introduction of the standard gas from the detector entrance, within 5 seconds to achieve a 90% response 
 Ambient temperature: Detector -10 ℃ ~ 80 ℃ converter 0 ℃ ~ 40 ℃ 
 Power supply and power consumption: power 220 ± 10% VAC, the power consumption up to 150W 
 ?? Sample temperature: ≤ 700 ° C (700 ° C above consultation supplier) 
 ??? Sample gas pressure range: -500 ~ 500mmH2O 
 ?? Detector length: 0.4m; 0.8m; 1.0m; 1.2m; (other lengths can be based on user requirements)