YZS数显氧指数测定仪是检测仪器，用于均质材料、层压材料、泡沫材料、软片和薄膜材料，在常温常压下，氧、氮混合气体中调节刚好维持试样燃烧的氧浓度。本机采用电机及调速系统一体化结构驱动减速机，经减速后带动丝杠进行加载。电气部分包括试验力测量系统和变形测量系统。并具有过载保护、位移控制等功能。设计简单，使用方便，性能稳定安全。

The oxygen index analyzer is a testing instrument for homogeneous materials, laminated materials, foam materials, films and film materials. At normal temperature and pressure, the oxygen and nitrogen mixtures are adjusted to just maintain the oxygen concentration of the sample. This machine adopts the integrated structure of motor and speed control system to drive the reducer, and after the deceleration, the lead screw is loaded for loading. The electrical part includes a test force measurement system and a deformation measurement system. And has overload protection, displacement control and other functions. Simple design, easy to use, stable and safe performance.

YZS数显氧指数测定仪符合标准：

依据《EN ISO 4589-2:2006-06室温氧指数测试》及《GBT 2406-1993 塑料燃烧性能试验方法 氧指数法》《GBT 8924-2005 纤维增强塑料燃烧性能试验方法氧指数法等要求生产。

The oxygen index analyzer meets the standards:

It is produced according to the requirements of "EN ISO 4589-2: 2006-06 Room Temperature Oxygen Index Test" and "GBT 2406-1993 Test Method for Burning Performance of Plastics.

YZS数显氧指数测定仪技术参数：

★测量范围：0-A、/02

★分辨率：0.1%、/02

★测量精度：(±0.4%)、/02

★响应时间：

★数显精度：0.1%±1个字

★输出漂移：<5%/年

★秒表：精度0.5s

★外形尺寸约：360×250×530mm

★保修期：发货后12个月

★仪器的工作条件：

★环境温度：-10℃-40℃

★相对湿度： ≤85%

★使用气体：GB3863工业用气态氧；GB3864工业用气态氮；两瓶气体均要调压器（用户自配）

★输入压力：(0.25-0.4) Mpa

★工作压力：O.lMpa

Technical parameters of oxygen index analyzer:

★ Measuring range: 0-A, / 02

★ Resolution: 0.1%, / 02

★ Measurement accuracy: (± 0.4%), / 02

★ Response time:

★ Digital display accuracy: 0.1% ± 1 character

★ Output drift: <5% / year

★ Stopwatch: 0.5s accuracy

★ Approximate dimensions: 360 × 250 × 530mm

★ Warranty period: 12 months after delivery

★ Working conditions of the instrument:

★ Ambient temperature: -10 ℃ -40 ℃

★ Relative humidity: ≤85%

★ Gas used: GB3863 industrial gaseous oxygen; GB3864 industrial gaseous nitrogen; both bottles of gas need pressure regulator (user-supplied)

★ Input pressure: (0.25-0.4) Mpa

★ Working pressure: O.lMpa

YZS数显氧指数测定仪操作方法：

★检查气路，确定各部分连接无误，无漏气现象。

★确定实验开始时的氧浓度：根据经验或试样在空气中点燃的情况，估计开始实验时的氧浓度。如试样在空气中迅速燃烧，则开始实验时的氧浓度为18%左右；如在空气中缓慢燃烧或时断时续，则为21%左右；在空气中离开点火源即马上熄灭，则至少为25%。根据经验，确定该地板革氧指数测定实验初始氧浓度为26%。氧浓度确定后，在混合气体的总流量为10l/min的条件下，便可确定氧气、氮气的流量。例如，若氧浓度为26%，则氧气、氮气的流量分别为2.5l/min和7.5l/min。

★安装试样：将试样夹在夹具上，垂直地安装在燃烧筒的**位置上（注意要划50mm标线），保证试样顶端低于燃烧筒顶端至少100mm，罩上燃烧筒（注意燃烧筒要轻拿轻放）。

★通气并调节流量：开启氧、氮气钢瓶阀门，调节减压阀压力为0.2～0.3MPa（由教员完成），然后开启氮气和氧气管道阀门(在仪器后面标注有红线的管路为氧气，另一路则为氮气,应注意：先开氮气，后开氧气，且阀门不宜开得过大),然后调节稳压阀，仪器压力表指示压力为0.1±0.01MPa，并保持该压力（禁止使用过高气压）。调节流量调节阀，通过转子流量计读取数据（应读取浮子上沿所对应的刻度），得到稳定流速的氧、氮气流。应注意：在调节氧气、氮气浓度后，必须用调节好流量的氧氮混合气流冲洗燃烧筒至少30s（排出燃烧筒内的空气）。

★点燃试样：用点火器从试样的顶部中间点燃，勿使火焰碰到试样的棱边和侧表面。在确认试样顶端全部着火后，立即移去点火器，开始计时或观察试样烧掉的长度。点燃试样时，火焰作用的时间A长为30s，若在30s内不能点燃，则应增大氧浓度，继续点燃，直至30s内点燃为止。

★确定临界氧浓度的大致范围：点燃试样后，立即开始记时，观察试样的燃烧长度及燃烧行为。若燃烧终止，但在1s内又自发再燃，则继续观察和记时。如果试样的燃烧时间超过3min，或燃烧长度超过50mm（满足其中之一），说明氧的浓度太高，必须降低，此时记录实验现象记“×”，如试样燃烧在3min和50mm之前熄灭，说明氧的浓度太低，需提高氧浓度，此时记录实验现象记“Ο”。如此在氧的体积百分浓度的整数位上寻找这样相邻的四个点，要求这四个点处的燃烧现象为“ΟΟ××”。例如若氧浓度为26%时，烧过50mm的刻度线，则氧过量，记为“×”，下一步调低氧浓度，在25%做**次，判断是否为氧过量，直到找到相邻的四个点为氧不足、氧不足、氧过量、氧过量，此范围即为所确定的临界氧浓度的大致范围。

★在上述测试范围内，缩小步长，从低到高，氧浓度每升高0.4%重复一次以上测试，观察现象，并记录。

★根据上述测试结果确定氧指数OI。

Operation method of oxygen index analyzer:

★ Check the gas path to make sure that all parts are connected correctly and there is no air leakage.

★ Determine the oxygen concentration at the beginning of the experiment: Based on experience or the ignition of the sample in the air, estimate the oxygen concentration at the beginning of the experiment. If the sample burns rapidly in the air, the oxygen concentration at the beginning of the experiment is about 18%; if it burns slowly or intermittently in the air, it is about 21%; when it leaves the ignition source in the air and immediately goes out, At least 25%. According to experience, it is determined that the initial oxygen concentration of the floor leather oxygen index measurement experiment is 26%. After the oxygen concentration is determined, the flow rate of oxygen and nitrogen can be determined under the condition that the total flow rate of the mixed gas is 10 l / min. For example, if the oxygen concentration is 26%, the flow rates of oxygen and nitrogen are 2.5 l / min and 7.5 l / min, respectively.

★ Install the sample: Clamp the sample on the fixture and install it vertically on the ** position of the combustion cylinder (note the 50mm mark) to ensure that the top of the sample is at least 100mm lower than the top of the combustion cylinder. Note that the burner should be handled gently.

Ventilation and flow adjustment: Open the oxygen and nitrogen cylinder valves, adjust the pressure reducing valve pressure to 0.2 to 0.3 MPa (completed by the instructor), and then open the nitrogen and oxygen pipeline valves (the pipeline marked with a red line on the back of the instrument is oxygen, and the other The other way is nitrogen, it should be noted that: first open nitrogen, then open oxygen, and the valve should not be opened too large), and then adjust the pressure regulator valve, the instrument pressure gauge indicates that the pressure is 0.1 ± 0.01MPa, and maintain this pressure (prohibited use High pressure). Adjust the flow control valve and read the data through the rotor flowmeter (the corresponding scale on the upper edge of the float should be read) to obtain a stable flow of oxygen and nitrogen. It should be noted that after adjusting the concentration of oxygen and nitrogen, the combustion cylinder must be flushed with the adjusted flow of oxygen-nitrogen mixed gas for at least 30s (exhaust the air in the combustion cylinder).

★ Ignite the sample: Use an igniter to ignite from the middle of the top of the sample. Do not let the flame hit the edges and side surfaces of the sample. After confirming that the top of the sample is on fire, remove the igniter immediately and start timing or observe the length of the sample burned out. When the sample is ignited, the flame action time A is 30s. If it cannot be ignited within 30s, increase the oxygen concentration and continue to ignite until it ignites within 30s.

★ Determine the approximate range of critical oxygen concentration: immediately after igniting the sample, start timing and observe the burning length and burning behavior of the sample. If the combustion is terminated, but spontaneously re-ignites within 1 s, continue observation and timing. If the burning time of the sample exceeds 3min, or the burning length exceeds 50mm (one of them is satisfied), it means that the oxygen concentration is too high and must be reduced. At this time, record the experimental phenomenon and record “×”. For example, if the sample burns before 3min and 50mm When it is off, it means that the oxygen concentration is too low, and the oxygen concentration needs to be increased. At this time, the experimental phenomenon "0" is recorded. In this way, looking for such four adjacent points on the integer digits of the volume percentage concentration of oxygen, it is required that the combustion phenomenon at these four points is “0 ××”. For example, if the oxygen concentration is 26% and the 50mm mark is burned, the excess oxygen will be marked as “×”. Next, adjust the oxygen concentration to 25% and do it ** times to determine whether it is oxygen excess until the phase is found. The four adjacent points are oxygen deficiency, oxygen deficiency, oxygen excess, and oxygen excess, and this range is the approximate range of the determined critical oxygen concentration.

★ In the above test range, reduce the step size, from low to high, repeat the test more than once for every 0.4% increase in oxygen concentration, observe the phenomenon, and record.

★ Determine the oxygen index OI based on the above test results.

YZS数显氧指数测定仪注意事项：

★本设备是试验测试设备请不要将本设备用于规定试验及料以外的目的。

试样制作要精细、准确，表面平整、光滑。

氧、氮气流量调节要得当，压力表指示处于正常位置，禁止使用过高气压，以防损坏设备。

流量计、玻璃筒为易碎品，实验中谨防打碎。

★请完善安装环境

请置于室温下。湿度低的场所。（80%以下无结露）灰尘和尘埃少的场所。

★请按要求安装试验材料

按要求安装试验材料，否则可能出现A预期故障。

★进行配线和维护作业时，请务必关闭电源

为了防止在作业过程中机器失去控制而导致事故和触电，请在进行作业前，务必先关闭电源。

★电源

关于本设备的电源，请注意以下事项。

原则上配电方式采用单相220V电源。

关于电源及电源工程，请与电气工程人员或有同等知识的人士商量。

★电源线

请务必使用随设备提供的电源线。发现电源线和电源插头有异常情况时，请与本公司联系。同我公司服务人员进行更换或指导更换。

★保险丝

为了防止火灾和内部电路的破损等，请不要用规定以外的保险丝。更换保险丝时，请使用与原设备相同型号和形状的保险丝。

★特别警告

警告应注意所执行的应用、或条件均具有很高的危险性，可能导致人员受伤或甚至死亡。

为了防止意外伤害或死亡发生，在搬移和使用设备时，请务必先观察清楚，然后再进行动作。

Note of oxygen index analyzer:

★ This equipment is a test equipment. Please do not use this equipment for purposes other than specified tests and materials.

The preparation of the sample should be fine and accurate, and the surface should be smooth and smooth.

The flow of oxygen and nitrogen must be properly adjusted. The pressure gauge indicates that it is in the normal position. It is forbidden to use excessively high pressure to prevent damage to the equipment.

The flowmeter and glass tube are fragile, so be careful not to break them during the experiment.

★ Please perfect the installation environment

Please leave it at room temperature. Places with low humidity. (No condensation below 80%) Place with little dust and dust.

★ Please install test materials as required

Install the test materials as required, otherwise A expected failure may occur.

★ Be sure to turn off the power when performing wiring and maintenance work

In order to prevent accidents and electric shock caused by the machine losing control during the work, please turn off the power before working.

★ Power

Regarding the power of this device, please note the following.

In principle, a single-phase 220V power supply is used for power distribution.

For power supply and power supply engineering, please consult with electrical engineering personnel or persons with equivalent knowledge.

★ Power cord

Be sure to use the power cord provided with the device. If you find anything abnormal with the power cord and plug, please contact us. Replace or instruct the replacement with our service personnel.

★ Fuse

To prevent fire, damage to internal circuits, etc., do not use fuses other than those specified. When replacing fuses, use fuses of the same type and shape as the original equipment.

★ Special warning

WARNING It should be noted that the application or condition being performed is highly dangerous and could result in injury or even death.

To prevent accidental injury or death, be sure to observe clearly when moving and using the equipment before moving.

YZS数显氧指数测定仪装箱清单：

★主机：1台

★玻璃管：2根

★玻璃珠：1斤（放入燃烧柱内）

★尼龙管：1.2米f连接燃烧柱与主机）

★密封圈：若干

★试样夹：l套

★金属网：1个（放入燃烧柱内）

★板手10-12：1把

★橡皮管：2根

★Ml0×1内接头螺钉：1颗（接燃烧柱内）

★Ml0×1接头螺母：l颗（接主机）

★说明书：1份

★合格证：1张

★GB/T2406标准：1份

Packing list of oxygen index analyzer

★ Host: 1

★ Glass tube: 2

★ Glass Beads: 1 kg (into the combustion column)

★ Nylon tube: 1.2m f connecting the combustion column and the host)

★ Seal ring: several

★ Sample holder: l set

★ Metal mesh: 1 (inside the combustion column)

★ Wrench 10-12: 1

★ rubber tube: 2

★ Ml0 × 1 inner joint screw: 1 (inside the combustion column)

★ Ml0 × 1 connector nut: 1 pc (connect to the host)

★ Instruction: 1 copy

★ Certificate of Conformity: 1

★ GB / T2406 standard: 1 copy