Oxygen concentration analyzer
Brief description:
Oxygen concentration analyzer manufacturer, oxygen is a special paramagnetic gas, that is, oxygen is attracted in a magnetic field. In the measuring unit, the concentration of oxygen can be measured by the deflection of a dumbbell suspended in a nonlinear magnetic field. The greater the concentration of oxygen, the greater the deflection static position of the dumbbell.
Oxygen concentration analyzer, oxygen is a special paramagnetic gas, that is, oxygen is attracted in a magnetic field. In the measuring unit, the concentration of oxygen can be measured by the deflection of a dumbbell suspended in a nonlinear magnetic field. The greater the concentration of oxygen, the greater the deflection static position of the dumbbell. The deflection position of the dumbbell can be measured by an optical device, a pair of photocells and a discharger. The dumbbell is surrounded by a coil, and the current passing through the coil resets the dumbbell. The magnitude of the reset current is proportional to the concentration of oxygen.
Product application areas:
1. Medical oxygen purity detection
2. Air separation high purity oxygen monitoring
3. Smelting industry welding industry petrochemical industry
4. Excess oxygen analysis of combustion system
5. Automobile emission and internal combustion engine detection
6. Oxygen content analysis in continuous monitoring system
7. Monitoring biogas process analysis
8. Monitoring low temperature gas and combustion gas
Product features:
1. Standard 19-inch chassis/small panel-mounted chassis, can be integrated with microcomputer and PLC in a complete analysis system.
2. Manual/automatic calibration.
3. LCD display, simple and practical operation interface.
4. The internal processing circuit adopts a new high-precision mathematical model for curve correction and digital processing, with high stability and reliability.
5. Standard isolated 4~20mA analog signal output, can be directly connected to DCS.
6. Can continuously measure SO2, NO, CO, CO2, CH4, O2, C2H4, C3H8, THC, R22 and other gases.
7. Can analyze one to three components at the same time
8. Multiple 4-20mA analog output, R232 signal output
9. Intelligent instrument, automatic calibration, fault self-diagnosis
10. High accuracy, good stability
11. Menu-based operation, full Chinese LCD display, simple operation
12. ppm and mg/m3 optional
13. Extremely short warm-up time, 5 minutes
Oxygen concentration analyzer is a commonly used gas concentration detection instrument in the laboratory, mainly used to detect the concentration of oxygen in the air or gas. Since the detection accuracy and correctness are crucial to the accuracy of the experiment and the test results, the oxygen concentration analyzer needs to be calibrated regularly to ensure its accuracy and effectiveness. This article will introduce the calibration method of the oxygen concentration analyzer in detail.
Working principle of oxygen concentration analyzer:
The oxygen concentration analyzer uses electrochemical sensor technology to measure the oxygen concentration by detecting the electrochemical reaction of oxygen molecules on the electrode surface. The specific working principle is as follows:
Oxygen molecules undergo redox reactions on the anode surface to generate electrons and oxygen ions:
O2 + 2H2O + 4e- → 4OH-
Oxygen ions react with water on the cathode surface and are reduced to water molecules:
O2 + 4H+ + 4e- → 2H2O
By measuring the flow of electrons, the oxygen concentration can be accurately calculated.
Calibration method of oxygen concentration analyzer:
The calibration method of oxygen concentration analyzer mainly includes: zero point calibration and oxygen calibration. Zero calibration refers to adjusting the reading of the oxygen concentration analyzer to zero in a pure nitrogen or air environment. Oxygen calibration refers to adjusting the reading of the oxygen concentration analyzer to the correct value in a gas flow where the true oxygen content is known. The following will introduce two calibration methods in detail.
Zero calibration
Zero calibration is the most basic and important step in the calibration of the oxygen concentration analyzer. This step is to ensure the accuracy of the oxygen concentration analyzer's measurement of air or nitrogen. The specific steps of zero calibration are as follows:
Step 1: Connect the oxygen concentration analyzer to the power supply and turn it on, and preheat it for 5-10 minutes.
Step 2: Select a zero oxygen environment, such as pure nitrogen or air, and insert and fix the probe of the oxygen concentration analyzer.
Step 3: Operate according to the requirements of the instrument manual and adjust the oxygen concentration analyzer reading to zero.
Step 4: Observe and confirm whether the reading is stable, and record the reading value and date, time and other information.
Oxygen calibration
Oxygen calibration is to ensure the accuracy of the oxygen concentration analyzer in detecting oxygen content. Usually, the calibration of the oxygen concentration analyzer is carried out in air with an oxygen concentration of 21%. The operation steps are as follows:
Step 1: Connect the oxygen source, open the oxygen source valve, and adjust the gas outlet rate to reach the set value.
Step 2: Insert the probe of the oxygen concentration analyzer into the output port of the oxygen flowmeter and fix it.
Step 3: After confirming that the oxygen flow is stable, perform the calibration operation according to the steps required by the instrument manual. Specifically, it is necessary to set the relevant parameters of the resonant disk and the electronic equipment, and adjust the reading of the oxygen analyzer according to the known oxygen content.
Step 4: Confirm that the reading of the oxygen concentration analyzer is consistent with the actual oxygen content, and record the relevant information.
Precautions:
Use appropriate standard oxygen concentration
In oxygen calibration operations, it is very important to use standard oxygen concentration. According to the instrument manual, it is usually recommended to use a standard oxygen concentration of 21% for operation.
Calibration frequency
The frequency of oxygen concentration analyzer calibration depends on the frequency of use of the instrument and the stability of the calibration results. Generally, it is recommended to calibrate the oxygen concentration analyzer daily and check the accuracy and reliability of the calibration results regularly.
Quality control
During the calibration process, attention should be paid to following the relevant quality control and record requirements, including: confirming whether the calibration process is performed correctly, recording calibration parameters and results, etc. All relevant information should be recorded in writing and properly preserved.
In summary, oxygen concentration analyzer is a commonly used gas concentration detection instrument in the laboratory. In order to ensure the accuracy and correctness of the detection, it needs to be calibrated regularly. The calibration method of oxygen concentration analyzer mainly includes zero point calibration and oxygen calibration, which should be operated in accordance with the requirements of the instrument manual. During the calibration process, attention should be paid to quality control and record requirements to ensure the accuracy and reliability of the instrument calibration results.
Audited Supplier 
){kind=link}