JF-3氧指数测定仪厂家/数显氧指数测定仪

仪器特征：
1、两个玻璃转子流量计分别控制氧、氮流量。
2、手动点火器点火安全可靠。
3、氧指数测试仪结构简单，操作方便。
补充：如果条件允许，采用质量流量计，数字化显示调节的气体流量，同时可以数字化显示氧气的百分比浓度，这样便于使用者的操作简便。
主要技术指标：
1、燃烧筒规格：石英玻璃筒内径：75mm，高度：450mm。
2、氧浓度调节范围：10%～60%。
3、试样夹内框尺寸：140mm×38mm。
补充说明：氧气调节的范围为0-*，虽然在使用中不会采用该区间，但是可以便于校准时标准气体的时候，例如可使用氮气校准0%点，可以使用纯氧气校准*数值，另外使用空气校准20.5%数值，这样可以体现出更好的线性度。
同时氧指数需要使用10.6L/MIN的混合气体流量，也就是说每次测试的混合气体的总流量总数为10.6L/MIN，在可以数字化显示出的情况下，为更加优良的选择。
适用标准：
国家标准： GB/T5454—1997《纺织批品燃烧性能测定 氧指数测定法》
GB/T2406.2—2009《塑料 用氧指数指数法测定燃烧行为 第2部分室温试验》
类似标准：
ISO 4589-2 Plastics-Determination of burning behaviour by oxygen index –Part 2: Ambient-temperature test 塑料-用氧指数法测定燃烧行为-第2部分:室温测试
ASTM D 2863供给塑料的类似蜡烛燃烧时zui低氧气浓度的测量方法(氧指数)
BS 2782-1 Method 141 塑料测试方法第1部分：热性质方法141 燃烧氧指数判定
IEC 1144：测定绝缘液体氧指数的试验方法
NF T 51-071塑料.燃烧性能氧指数评定
HSK 7201 燃烧氧指数测定
氧指数测定仪厂家/数显氧指数测定仪GB/T5454-范围：
本标准规定试样置于垂直的试验条件下,在氧、氮混合气流中，测定试样刚好维持燃烧所需要zui低氧浓度（亦称极限氧指数）的试样方法。 本标准适用于测定各种类型的纺织品（包括单组分或多组分），如机织物，针织物、非织造布、涂层织物、层压织物、复合织物、地毯类等（包括阻燃处理和未经处理）的燃烧性能。 本标准仅用于测定在实验室条件下纺织品的燃烧性能，控制产品质量，而不能作为评定试剂使用条件下着火危险性的依据，或只能作为分析某种特殊用途发生火灾时所有因素之一。
文献解释：
1、材料的阻燃特性一般用氧指数表示，氧指数是指一定尺寸的材料（试片）装入试验装置中，在规定条件下，通入氧与氮的混合气体，将试片用点火器点燃，测定保持如蜡状持续燃烧所必须的zui低氧浓度（以百分数来表示）
2、测手段之一，氧指数是指在zui大氧气条件2.2方案且简述下，防火产品耐烧的特性，在工程中应用.方案11的设计原则主要是以电缆防火根据燃烧强度确定
3、氧指数是指在zui大氧气条件下，防火产品耐烧的特性.在工程中使用应根据燃烧强度确定.例如，在30根电缆的条件下，如发生电缆引燃事故，在4min以内即可形成500℃以上高温热聚集，从而导致电缆沿走向进行延燃
4、62 研究型测试法621 氧指数法（OI） 氧指数是指一定尺寸试材在氧氮混合气体中，并在规定条件下呈蜡状有焰燃烧所需的zui小氧浓度。
5、所谓氧指数"是指在所规定的试验条件下在室温下材料在O2、N2混合气体中刚好维持发焰燃烧时的zui小氧浓度以体积的百分率表示.其氧指数越高表明阻燃性能越好。
6、所谓氧指数是指在规定的测试条件下试样在氧气和氮气的混合气流中维持稳定燃烧时所需的zui低氧气浓度.在数值上它用混合气流中氧气所占的混合气体的体积百分数表示。
7、氧指数是指大气中支持燃烧所需要的氧气比.因为地球只含有21%的氧气，PVC一C只在火不断提供的情况下，才会燃烧.一旦火源离开，它将立即熄灭。
8、⑶氧指数测定.所谓氧指数，是指在规定的实验条件下，使材料恰好保持燃烧状态所需氧氮混合气体中氧的zui低浓度，用LOI(LimitedOxygenIndex）表示.按照国家标准GB5454—85，用HC-1型氧指数测定仪测定样品的氧指数。
9、所谓氧指数是指试样在N2O2的混合气体中维持继续燃烧所需要的zui低氧浓度[3].氧指数越大，材料的阻燃性能越好.未添加阻燃剂前，测得硅橡胶体系的氧指数是24。
10、所谓氧指数是指在规定的试验条件下为了维持燃烧所需的氧气zui低浓度值.氧指数越小越易燃烧反之氧指数越大越难燃烧.氧指数在26%以上时在平常的空气中不能燃烧可以认为是难燃。
11、氧指数是指试样在氧气、氮气混合气流中点燃后能使其维持稳定的烛焰形燃烧时氧气的zui低体积分数，其关系式为OI=Cf+kd1）式中：Cf为体积百分数表示的zui终氧浓度；k为系数；d为氧浓度级差（GB10707-2008）。
12、首先必须了解低烟阻燃PVC电缆料的二个重要概念：收稿日期1997－01－27⑴阻燃性能衡量指标为氧指数OI所谓氧指数是指维持试样燃烧需要的zui低氧浓度（GB2466.2－2009)。
试样规格：
氧指数测试仪根据被测试材料的类型，存在6种不同的试样规格. 注塑 成型材料建议使用80至120mm长，10mm宽，4mm厚的 试样. 只有当测试用试样的规格相同时，不同材料之间的 试验结果才可以相互比较.

JF-3
Instrument characteristics:
1, the two glass rotor flowmeter control oxygen and nitrogen flow.
2, the use of special manual ignition safe ignition.
3, oxygen index tester is simple in structure, easy to operate.
If the conditions permit, it is best to use a mass flowmeter, digital display of the gas flow regulation, while the digital display of the concentration of oxygen, so easy to operate the user.
Main technical index:
1, burning cylinder specifications: quartz glass tube diameter: 75mm, height: 450mm.
2, oxygen concentration adjustment range: 10% ~ 60%.
3, the sample clip frame size: 140mm * 38mm.
Note: the best range oxygen regulator for 0-*, although the range is not used in use, but can facilitate calibration of standard gas, such as nitrogen using 0% point calibration, can use pure oxygen in the air * numerical calibration, calibration of 20.5% values, which can reflect a better linearity.
At the same time, the oxygen index of mixed gas flow to the use of 10.6L/MIN, that is to say the total number of the total flow of mixed gas of each test is 10.6L/MIN, in the case of digital display, for more excellent choice.
Applicable standard:
National standard: GB/T5454 - 1997. Determination of the combustion performance of textile products - Determination of oxygen index
GB/T2406.2 - 2009 - Determination of combustion behavior of plastics by oxygen index method - Part second - room temperature test
Similar standards:
4589-2 Plastics-Determination of burning by oxygen index 2: Ambient-temperature test plastics - Determination of burning behaviour using the oxygen index method - Part: room temperature tests for second Part behaviour
Method for measuring the minimum oxygen concentration (D) of a candle in a plastic ASTM similar to a candle burning (oxygen index)
BS 2782-1 Method 141 plastics test methods - part first: thermal properties - Determination of 141 oxygen index
IEC 1144: Test Method for determination of oxygen index of insulating liquids
NF T 51-071 plastics - Determination of oxygen index of combustion performance
Determination of oxygen index of HSK 7201
GB/T5454- range:
In this standard, the sample is placed in a vertical test condition, and in the mixed flow of oxygen and nitrogen, the sample method for determining the minimum oxygen concentration (also known as the limiting oxygen index) of the sample is maintained. This standard is applicable to the determination of the various types of textiles (including single or multi component), such as woven fabrics, knitted fabrics, nonwoven fabric, coating fabric, laminated fabric, composite fabric, carpet etc. (including flame retardant treated and untreated) combustion performance. This standard is only used for the determination of combustion performance of textiles under laboratory conditions, to control the quality of products, and can be used as the evaluation reagent condition of fire hazard of the basis, or only as a special purpose fire analysis of all factors.
Literature interpretation:
1, the general characteristics of flame retardant materials with oxygen index, oxygen index refers to the size of the material (specimen) loading test device, under specified conditions, the mixed gas into oxygen and nitrogen, the specimen is ignited by the igniter, the determination of minimum oxygen concentration maintained as wax to keep burning (expressed as percentage)
2, one of the means of measurement, the oxygen index refers to the 2.2 and the maximum oxygen conditions, characteristics of fire resistance of fire products, application in the project. The design principle of scheme 11 is mainly based on the combustion intensity determination of cable fire
3, the oxygen index refers to the maximum oxygen conditions, characteristics of fire resistance of fire products. Use should be determined according to the intensity of combustion in engineering. For example, in the 30 cables under the condition such as the occurrence of accident ignition cable, high temperature above 500 DEG heat accumulation within 4min can be formed, which leads to the cable along the strike. Burning
4, the research test method of the 621 oxygen index (OI) oxygen index is a certain size of the test material in the oxygen and nitrogen mixed gas, and under the conditions of the wax flame combustion required minimum oxygen concentration.
5, the oxygen index "refers to the test conditions specified in the materials at room temperature in O2 and N2 in mixed gas just to maintain minimum oxygen concentration in the combustion flame volume percentage. The oxygen index show that the higher the better flame-retardant properties.
6, the oxygen index refers to the specimen under the specified test conditions to maintain the minimum oxygen concentration required for stable combustion when the mixed gas of oxygen and nitrogen. The volume fraction of mixed gas in numerical mixing it with the oxygen flow for the said.
7, the oxygen index refers to the atmosphere to support the burning of the required oxygen ratio. Because the earth contains only 21% of oxygen, PVC C only in the case of continuous fire, will burn. Once the fire left, it will immediay put out.
8, the oxygen index determination of oxygen index, refers to the established experimental conditions, the material to keep burning the lowest concentration state of oxygen and nitrogen mixed gas of oxygen, with LOI (LimitedOxygenIndex). According to the national standard GB5454 - 85, determination of the oxygen index determination instrument HC-1 oxygen index.
9, the oxygen index refers to the sample maintained in N2O2 gas mixture to the minimum oxygen concentration oxygen index of [3]. burning need more and better flame-retardant properties of materials. No flame retardant is added, the oxygen index of the measured silicon rubber system is 24.
10, the oxygen index refers to the specified test conditions in order to maintain the minimum oxygen concentration required for combustion value. The oxygen index is smaller and more easily burning oxygen index difficult to burn. The oxygen index is more than 26% in the usual air does not burn can be considered difficult to burn.
11, oxygen index refers to the sample in oxygen, nitrogen mixed gas in the ignition can maintain stability