The polymer oxygen index value is the minimum oxygen concentration (also known as oxygen index) required to maintain the combustion of the sample in the mixed air flow of oxygen and nitrogen required when the substance is ignited and burned for 50mm long or the burning time is 180s. 【Relevant Standards】

ASTM D 2863, ISO 4589-2, NES 714 GB/T 5454 GB/T 10707 GB/T 8924-2005 GB/T 16581-1996 NB/SH/T 0815-2010 TB/T 2919-1998 IEC 61144-1992 ISO 15705-2002 ISO 4589-2-1996

【Scope of application】:The polymer oxygen index value is the minimum oxygen concentration (also known as oxygen index) required to maintain the combustion of the sample in the mixed air flow of oxygen and nitrogen required when the substance is ignited and burned for 50mm long or the burning time is 180s. [Meet the standard]:ASTM D 2863, ISO 4589-2, NES 714  GB/T 5454 GB/T 10707   GB/T 8924-2005 GB/T 16581-1996 NB/SH/T 0815-2010 TB/T 2919-1998 IEC 61144-1992  ISO 15705-2002  ISO 4589-2-1996 [Instrument features]: 1. Full-color touch screen control, just set the oxygen concentration value on the touch screen, the program will automatically adjust to the oxygen concentration balance and emit a sound prompt, eliminating the trouble of manually adjusting the oxygen concentration; one-click calibration of oxygen concentration, data storage; 2. The use of step-by-step proportional valve greatly improves the control accuracy of flow, and adopts closed-loop control, and the oxygen concentration drift program is automatically adjusted back to the target value during the test, which avoids the disadvantages of the traditional oxygen index meter that cannot adjust the oxygen concentration in the test, and greatly improves the test accuracy. 3. The equipment comes with a fume hood, which can automatically exhaust smoke. Note: Oxygen sensor a. Introduction to oxygen sensor: In the test of oxygen index test, the role of the oxygen sensor is to convert the chemical signal of combustion into an electronic signal and display it in front of the operator. The sensor is equivalent to a battery, which is consumed once in each test, and the higher the frequency of use by the user or the higher the oxygen index value of the test material, the higher the consumption of the oxygen sensor. b. Maintenance of oxygen sensor: Excluding normal losses, the following two points help extend the service life of oxygen sensors in terms of maintenance and maintenance: c. If the equipment does not need to be tested for a long time, the oxygen sensor can be removed and sealed and stored at a lower temperature by certain means to isolate oxygen preservation. Simple operation method It can be properly protected with plastic wrap and placed in the refrigerator compartment. d. If the frequency of use of the equipment is relatively high (such as the use cycle of three or four days), at the end of the test on the same day, the oxygen cylinder can be turned off at intervals of one or two minutes and then the nitrogen cylinder can be turned off to fill the nitrogen in other mixing devices to reduce the ineffective reaction of contact between the oxygen sensor and oxygen. 【Technical Parameters】: 1. Imported oxygen sensor is adopted, the digital display of oxygen concentration does not need to be calculated, the accuracy is higher and more accurate, the range is 0-100% 2. Display accuracy± 0.01 3. Touch screen setting program automatically adjusts oxygen concentration 4. One-click calibration accuracy 5. One-click ratio concentration 6. Stable oxygen concentration automatically prompts alarm sound 7. With timing function 8. Experimental data can be stored 9. Historical data can be queried 10. Historical data can be cleared 11. You can choose whether to burn 50mm or not 12. Air source fault prompt 13. Oxygen sensor failure prompt 14. Oxygen and nitrogen misconnection prompts 15. Oxygen sensor aging tip 16. Standard oxygen concentration input 17. Combustion cylinder diameter can be set (two common specifications are optional) 18. Flow adjustment range: 0-20L/min(0-1200L/h) 19. Quartz glass tube: choose one of two specifications (inner diameter ≥75mm or inner diameter ≥85mm) 20. Gas flow rate in the combustion cylinder: 40mm±2mm/s 21. Overall dimensions: 94*72*160cm 22. Automatic smoke exhaust Smoke exhaust pipe outer diameter: 7.6cm 23. Test environment: ambient temperature: room temperature ~40°C; , relative humidity: ≤70%; 24. Input pressure: 0.25-0.3MPa 25. Working pressure: nitrogen 0.15-0.20Mpa oxygen 0.15-0.20Mpa 26. Automatic lifting propane (butane) ignition system, the ignition nozzle is made of a metal tube, and there is a nozzle with an inner diameter of Φ2±1mm at the end, which can be bent freely. It can be inserted into the burner to ignite the specimen, the flame length: 16±4mm, the size of 5mm-60mm can be adjusted freely, 27. Gas: industrial nitrogen, oxygen, purity >99%; (Note: The gas source and link head are provided by the user) Tips: The oxygen index meter needs to use no less than 98% of the industrial-grade oxygen/nitrogen gas bottle as the gas source during the test, because the above gas is a high-risk transportation product, it cannot be provided as an accessory for the oxygen index meter, and can only be purchased at the user’s local gas station. (To ensure the purity of the gas, please purchase it at the local regular gas station) 28. Power requirements: AC220(+10%)V, 50HZ 29. Maximum working power: 150W 30. Self-supporting material specimen clamp: can be fixed at the position of the combustion cylinder axis and can clamp the specimen vertically 31. Non-self-supporting material specimen clamp: can fix the two vertical edges of the specimen on the frame at the same time (optional/applied to soft non-self-supporting materials such as textiles) 32. Internet of Things function: control and read data through the router and save the data to the computer, and print reports 33. Constant temperature base: control the temperature of the mixture to be kept at 23°±2°C 【Installation Conditions】: 1.Space requirements: Dimensions:94*72*160cm (including feet) Weight (KG):About 100 Test Bench:The length of the workbench is not less than 1.2 meters and the width is not less than 0.75 meters, and the smoke exhaust pipe needs to be connected out (diameter 10cm) 2.Power Requirements: Voltage:220V±10％ 、50HZ Power:150W 3.Water Source:None 4.Air source:Gas: Industrial nitrogen, oxygen, purity >99% 5.Contaminant description:Smoke and dust 6.Ventilation requirements:The equipment needs to be put into the fume hood or used for flue gas collection and connected to the flue gas treatment and purification system 7.Other tests required:Dual-gauge pressure reducing valve with gas cylinder (capable of dispensing 0.2 megapascals)