WJHC-5氧指數測定儀
氧指數測定儀符合塑料燃燒性能試驗方法氧指數法GB/T2406-2008和紡織品燃燒性能試驗氧指數法GB/T5454等標準國家標準，用于評定聚合物在規定試驗條件下的燃燒性能，即測定聚合物剛好維持燃燒的氧的體積百分比濃度。適用于塑料、橡膠、纖維、泡沫塑料、軟片和薄膜及紡織等材料的燃燒性能測定。
數顯氧指數測定儀是一種測定聚合物燃燒性準確、重現性好、方便快捷的檢測儀器。本儀器不僅可以作為鑒定聚合物難燃性的手段，還可以作為一種研究儀器。
一、WJHC-5氧指數測定儀產品優勢：
1.全彩觸摸屏控制，只需在觸屏上設定氧濃度值，程序便會自動調節到氧濃度平衡并發出嘀的聲音提示，免去了人工調節氧濃度的麻煩；
2.采用步進比例閥大大提高了流量的控制精度，采用閉環控制，測試當中氧濃度漂移程序自動調節回到目標值，大大提高了測試精度。
二、設計標準：
GB/T 2406.2 GB/T 2406 ASTM D 2863, ISO 4589-2, NES 714 GB/T 5454 GB/T 10707 GB/T 8924 GB/T 16581 NB/SH/T 0815-2010 TB/T 2919
IEC 61144 ISO 15705 ISO 4589-2
三、WJHC-5氧指數測定儀主要技術參數
1.采用高精度傳感器，數字顯示氧氣濃度無需計算，精度更高更準確，范圍0— 99%
2.數字分辨率：±0.1%
3.測量精度：0.1級
4.觸摸屏設置程序自動調節氧濃度
5.一鍵校準精度
6.一鍵配比濃度
7.氧濃度穩定自動提示報警聲
8.帶有計時功能
9.可存儲實驗數據
10.可查詢歷史數據
11.可清除歷史數據
12.可選擇是否燃燒50mm
13.氣源故障提示
14.氧傳感器故障提示
15.氧氣氮氣錯接提示
16.氧傳感器老化提示
17.標準氧濃度輸入
18.可設定燃燒筒直徑(兩種常用規格可選)
19.流量調節范圍：0-20L/min（0-1200L/h）
20.石英玻璃筒：兩種規格任選其一（內徑≥75㎜ 或內徑≥85㎜）
21.燃燒筒內氣體流速：40mm±2mm/s
22.整機外形尺寸： 650mm×400×830mm
23.壓力表精度2.5級，分辨率：0.01MPa
24.試驗環境：環境溫度：室溫～40℃；， 相對濕度：≤70%；
25.輸入壓力：0.25-0.3MPa
26.工作壓力：氮氣0.15-0.20Mpa 氧氣0.15-0.20Mpa
27.試樣夾可用于軟質和硬質塑料、各類建筑材料、紡織品、防火門等
28.丙烷（丁烷）點火系統，點火嘴為一根金屬管制成，尾端有內徑Φ2±1mm 的噴嘴，可自由彎曲。能插入燃燒筒內點燃試樣，火焰長度： 16±4mm ， 大小5mm-60mm可自由調節，
29.氣體：工業用氮氣、氧氣，純度＞99%；（用戶自備/正規氣站工業氧氣純度一般為99.2%-99.3%之間）。
30.電源要求：AC220（+10% ）V、50HZ
31.使用功率：150W
32.自撐材料試樣夾：能固定在燃燒筒軸心位置上、并能垂直夾住試樣
33.非自撐材料試樣夾：能將試樣的兩個垂直邊同時固定在框架上( 選配/應用于紡織品等柔軟不可自撐材料)
四、配置
Tips:氧指數測定儀試驗時需用不小于98%的工業級氧氣/氮氣各一瓶作為氣源，由于以上氣體為高危運輸品，無法作為氧指數測定儀的配件提供，只能在用戶當地氣站購買。（為保證氣體的純度請在當地正規氣站進行購買）
以下為部分觸摸屏控制界面：
Wjhc-5 intelligent full automatic touch screen controlled oxygen index tester
1、 Advantages of wjhc-5 intelligent automatic touch screen controlled oxygen index analyzer
1. Full color touch screen control, as long as the oxygen concentration value is set on the touch screen, the program will automatically adjust to the oxygen concentration balance and send out a beep sound prompt, avoiding the trouble of manually adjusting the oxygen concentration;
2. The step proportional valve is used to greatly improve the flow control accuracy. The closed-loop control is used to automatically adjust the oxygen concentration drift program back to the target value during the test, which greatly improves the test accuracy.
2、 Design criteria:
GB/T 2406.2 GB/T 2406 ASTM D 2863, ISO 4589-2, NES 714 GB/T 5454 GB/T 10707 GB/T 8924 GB/T 16581 NB/SH/T 0815-2010 TB/T 2919
IEC 61144 ISO 15705 ISO 4589-2
3、 Main technical parameters of wjhc-5 intelligent full automatic touch screen controlled oxygen index tester
1. With high precision sensor, the oxygen concentration can be displayed digitally without calculation, and the accuracy is higher and more accurate, with the range of 0-99%
2. Digital resolution: ± 0.1%
3. Measurement accuracy: 0.1 level
4. Touch screen setting program automatically adjusts oxygen concentration
5. One button calibration accuracy
6. One bond ratio concentration
7. Stable oxygen concentration, automatic alarm sound
8. With timing function
9. It can store experimental data
10. Historical data can be queried
11. Historical data can be cleared
12. It can choose whether to burn 50 mm or not
13. Air source failure prompt
14. Oxygen sensor fault prompt
15. Tips for wrong connection of oxygen and nitrogen
16. Oxygen sensor aging prompt
17. Standard oxygen concentration input
18. Diameter of combustion cylinder can be set (two common specifications are optional)
19. Flow regulation range: 0-20l / min (0-1200l / h)
20. Quartz glass cylinder: one of two specifications (inner diameter ≥ 75mm or inner diameter ≥ 85mm)
21. Gas velocity in combustion cylinder: 40mm ± 2mm / S
22. Overall dimension: 650mm × 400 × 830mm
23. Accuracy of pressure gauge is grade 2.5, resolution: 0.01Mpa
24. Test environment: ambient temperature: room temperature ~ 40 ℃; relative humidity: ≤ 70%;
25. Input pressure: 0.25-0.3mpa
26. Working pressure: nitrogen 0.15-0.20mpa, oxygen 0.15-0.20mpa
27. The sample holder can be used for soft and hard plastics, various building materials, textiles, fire doors, etc
28. Propane (butane) ignition system, the ignition nozzle is made of a metal tube, with a nozzle with inner diameter of Φ 2 ± 1 mm at the end, which can be bent freely. The flame length is 16 ± 4mm and the size is 5mm-60mm, which can be adjusted freely,
29. Gas: nitrogen and oxygen for industrial use, purity > 99%; (purity of industrial oxygen in user provided / regular gas station is generally between 99.2% and 99.3%).
30. Power requirements: AC220 (+ 10%) V, 50 Hz
31. Maximum power: 150W
32. Self supporting material sample clamp: it can be fixed on the axial position of combustion cylinder and can hold the sample vertically
33. Non self supporting material sample holder: it can fix two vertical sides of the sample on the frame at the same time (optional / applied to soft non self supporting materials such as textiles)
4、 Configuration
Tips: during the test of oxygen index tester, one bottle of industrial grade oxygen / nitrogen of no less than 98% is required as the gas source. As the above gases are high-risk transport products, they can not be provided as accessories of oxygen index analyzer, so they 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)
The following are some touch screen control interfaces:
