JF-3氧指數(shù)測定儀廠家/數(shù)顯氧指數(shù)測定儀

儀器特征：
1、兩個玻璃轉(zhuǎn)子流量計分別控制氧、氮流量。
2、手動點火器點火安全可靠。
3、氧指數(shù)測試儀結(jié)構(gòu)簡單，操作方便。
補充：如果條件允許，采用質(zhì)量流量計，數(shù)字化顯示調(diào)節(jié)的氣體流量，同時可以數(shù)字化顯示氧氣的百分比濃度，這樣便于使用者的操作簡便。
主要技術(shù)指標(biāo)：
1、燃燒筒規(guī)格：石英玻璃筒內(nèi)徑：75mm，高度：450mm。
2、氧濃度調(diào)節(jié)范圍：10%～60%。
3、試樣夾內(nèi)框尺寸：140mm×38mm。
補充說明：氧氣調(diào)節(jié)的范圍為0-*，雖然在使用中不會采用該區(qū)間，但是可以便于校準(zhǔn)時標(biāo)準(zhǔn)氣體的時候，例如可使用氮氣校準(zhǔn)0%點，可以使用純氧氣校準(zhǔn)*數(shù)值，另外使用空氣校準(zhǔn)20.5%數(shù)值，這樣可以體現(xiàn)出更好的線性度。
同時氧指數(shù)需要使用10.6L/MIN的混合氣體流量，也就是說每次測試的混合氣體的總流量總數(shù)為10.6L/MIN，在可以數(shù)字化顯示出的情況下，為更加優(yōu)良的選擇。
適用標(biāo)準(zhǔn)：
國家標(biāo)準(zhǔn)： GB/T5454—1997《紡織批品燃燒性能測定 氧指數(shù)測定法》
GB/T2406.2—2009《塑料 用氧指數(shù)指數(shù)法測定燃燒行為 第2部分室溫試驗》
類似標(biāo)準(zhǔn)：
ISO 4589-2 Plastics-Determination of burning behaviour by oxygen index –Part 2: Ambient-temperature test 塑料-用氧指數(shù)法測定燃燒行為-第2部分:室溫測試
ASTM D 2863供給塑料的類似蠟燭燃燒時zui低氧氣濃度的測量方法(氧指數(shù))
BS 2782-1 Method 141 塑料測試方法第1部分：熱性質(zhì)方法141 燃燒氧指數(shù)判定
IEC 1144：測定絕緣液體氧指數(shù)的試驗方法
NF T 51-071塑料.燃燒性能氧指數(shù)評定
HSK 7201 燃燒氧指數(shù)測定
氧指數(shù)測定儀廠家/數(shù)顯氧指數(shù)測定儀GB/T5454-范圍：
本標(biāo)準(zhǔn)規(guī)定試樣置于垂直的試驗條件下,在氧、氮混合氣流中，測定試樣剛好維持燃燒所需要zui低氧濃度（亦稱極限氧指數(shù)）的試樣方法。 本標(biāo)準(zhǔn)適用于測定各種類型的紡織品（包括單組分或多組分），如機織物，針織物、非織造布、涂層織物、層壓織物、復(fù)合織物、地毯類等（包括阻燃處理和未經(jīng)處理）的燃燒性能。 本標(biāo)準(zhǔn)僅用于測定在實驗室條件下紡織品的燃燒性能，控制產(chǎn)品質(zhì)量，而不能作為評定試劑使用條件下著火危險性的依據(jù)，或只能作為分析某種特殊用途發(fā)生火災(zāi)時所有因素之一。
文獻解釋：
1、材料的阻燃特性一般用氧指數(shù)表示，氧指數(shù)是指一定尺寸的材料（試片）裝入試驗裝置中，在規(guī)定條件下，通入氧與氮的混合氣體，將試片用點火器點燃，測定保持如蠟狀持續(xù)燃燒所必須的zui低氧濃度（以百分?jǐn)?shù)來表示）
2、測手段之一，氧指數(shù)是指在zui大氧氣條件2.2方案且簡述下，防火產(chǎn)品耐燒的特性，在工程中應(yīng)用.方案11的設(shè)計原則主要是以電纜防火根據(jù)燃燒強度確定
3、氧指數(shù)是指在zui大氧氣條件下，防火產(chǎn)品耐燒的特性.在工程中使用應(yīng)根據(jù)燃燒強度確定.例如，在30根電纜的條件下，如發(fā)生電纜引燃事故，在4min以內(nèi)即可形成500℃以上高溫?zé)峋奂?，從而?dǎo)致電纜沿走向進行延燃
4、62 研究型測試法621 氧指數(shù)法（OI） 氧指數(shù)是指一定尺寸試材在氧氮混合氣體中，并在規(guī)定條件下呈蠟狀有焰燃燒所需的zui小氧濃度。
5、所謂氧指數(shù)"是指在所規(guī)定的試驗條件下在室溫下材料在O2、N2混合氣體中剛好維持發(fā)焰燃燒時的zui小氧濃度以體積的百分率表示.其氧指數(shù)越高表明阻燃性能越好。
6、所謂氧指數(shù)是指在規(guī)定的測試條件下試樣在氧氣和氮氣的混合氣流中維持穩(wěn)定燃燒時所需的zui低氧氣濃度.在數(shù)值上它用混合氣流中氧氣所占的混合氣體的體積百分?jǐn)?shù)表示。
7、氧指數(shù)是指大氣中支持燃燒所需要的氧氣比.因為地球只含有21%的氧氣，PVC一C只在火不斷提供的情況下，才會燃燒.一旦火源離開，它將立即熄滅。
8、⑶氧指數(shù)測定.所謂氧指數(shù)，是指在規(guī)定的實驗條件下，使材料恰好保持燃燒狀態(tài)所需氧氮混合氣體中氧的zui低濃度，用LOI(LimitedOxygenIndex）表示.按照國家標(biāo)準(zhǔn)GB5454—85，用HC-1型氧指數(shù)測定儀測定樣品的氧指數(shù)。
9、所謂氧指數(shù)是指試樣在N2O2的混合氣體中維持繼續(xù)燃燒所需要的zui低氧濃度[3].氧指數(shù)越大，材料的阻燃性能越好.未添加阻燃劑前，測得硅橡膠體系的氧指數(shù)是24。
10、所謂氧指數(shù)是指在規(guī)定的試驗條件下為了維持燃燒所需的氧氣zui低濃度值.氧指數(shù)越小越易燃燒反之氧指數(shù)越大越難燃燒.氧指數(shù)在26%以上時在平常的空氣中不能燃燒可以認(rèn)為是難燃。
11、氧指數(shù)是指試樣在氧氣、氮氣混合氣流中點燃后能使其維持穩(wěn)定的燭焰形燃燒時氧氣的zui低體積分?jǐn)?shù)，其關(guān)系式為OI=Cf+kd1）式中：Cf為體積百分?jǐn)?shù)表示的zui終氧濃度；k為系數(shù)；d為氧濃度級差（GB10707-2008）。
12、首先必須了解低煙阻燃PVC電纜料的二個重要概念：收稿日期1997－01－27⑴阻燃性能衡量指標(biāo)為氧指數(shù)OI所謂氧指數(shù)是指維持試樣燃燒需要的zui低氧濃度（GB2466.2－2009)。
試樣規(guī)格：
氧指數(shù)測試儀根據(jù)被測試材料的類型，存在6種不同的試樣規(guī)格. 注塑 成型材料建議使用80至120mm長，10mm寬，4mm厚的 試樣. 只有當(dāng)測試用試樣的規(guī)格相同時，不同材料之間的 試驗結(jié)果才可以相互比較.

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