瀝青閃點(diǎn)與燃點(diǎn)測(cè)定儀

　　騰達(dá)試驗(yàn)儀器廠；

　　一、產(chǎn)品簡(jiǎn)介：

　　瀝青閃點(diǎn)儀是**檢測(cè)儀器，適用于克利夫蘭開(kāi)口杯（簡(jiǎn)稱COC）測(cè)定粘稠石油瀝青、煤瀝青及閃點(diǎn)在79℃以上的液體石油瀝青材料的閃點(diǎn)和燃點(diǎn)，以評(píng)定施工安全性時(shí)使用。

　　Product introduction:

　　Asphalt flash point tester is a testing instrument suitable for Clevelａnd Open Cup(COC)to measure the flash point and ignition point of viscous petroleum pitch,coal pitch,ａnd liquid petroleum pitch materials with flash points above 79°C to assess construction safety.When using.

　　二、技術(shù)參數(shù)：

　　★電源：220V±10％50H

　　★環(huán)境溫度：-10℃~50℃

　　★相對(duì)濕度：≤85%

　　★自動(dòng)掃劃、點(diǎn)火；

　　★電爐加熱功率0~400W連續(xù)可調(diào)；

　　★加熱絲由透明石英管保護(hù)，無(wú)明火，防爆，且升溫速度快；

　　★外形尺寸;500X400X300mm

　　★重量;7kg

　　Technical parameters:

　　★Power supply:220V±10%50H

　　★Ambient temperature:-10℃~50℃

　　★Relative humidity:≤85%

　　★Automatic scanning and ignition;

　　★Electric furnace heating power is continuously adjustable from 0~400W;

　　★The heating wire is protected by a transparent quartz tube,no open flame,explosion-proof,ａnd fast heating speed;

　　★Dimensions;500X400X300mm

　　Weight:7kg

　　三、安裝使用：

　　★打開(kāi)包裝箱，按儀器成套及技術(shù)文件來(lái)檢查儀器外表及相關(guān)配件，如無(wú)損壞或缺失，則按結(jié)構(gòu)圖所示安裝。

　　★檢查電源接地是否良好。

　　★打開(kāi)電源開(kāi)關(guān)，指示燈亮，隨后**可以進(jìn)行試驗(yàn)操作。

　　★將試樣杯用溶劑洗凈、烘干，裝置于支架上。

　　★安裝溫度計(jì)，將溫度計(jì)垂直插入試樣杯中，溫度計(jì)的水銀球距杯底約6.5mm，位置在與點(diǎn)火器相對(duì)一側(cè)距杯邊緣16mm處。

　　★將試樣準(zhǔn)備好后，注入試樣杯中至標(biāo)線處，并使試樣杯其它部位不沾有瀝青。（注：試樣加熱溫度不能超過(guò)閃點(diǎn)以下55℃）

　　★全部裝置應(yīng)置于室內(nèi)光線較暗且無(wú)顯著空氣流通的地方，并用防風(fēng)屏三面圍護(hù)。

　　★將點(diǎn)火器與可燃?xì)馊珘毫θ萜鳎ㄈ缫夯闅饣蛱烊粴猓┯密浌苓B接，將點(diǎn)火器轉(zhuǎn)向一側(cè)，試驗(yàn)點(diǎn)火，調(diào)試火苗成標(biāo)準(zhǔn)球的形狀或直徑為4mm±0.8mm的小球形試焰。

　　Third,installation and use:

　　★Open the packing box,check the appearance of the instrument and related accessories according to the complete set of equipment and technical documents.If there is no damage or missing,install as shown in the figure.

　　★Check if the power supply is well grounded.

　　★Turn on the power switch,the indicator light is on,ａnd then the test operation can be performed.

　　★Wash and dry the sample cup with solvent and install it on the holder.

　　★Install the thermometer,insert the thermometer vertically into the sample cup,the mercury ball of the thermometer is about 6.5mm from the bottom of the cup,ａnd the position is 16mm from the edge of the cup on the side opposite to the igniter.

　　★After preparing the sample,pour it into the sample cup to the marked line,ａnd keep the other parts of the sample cup free of asphalt.(Note:The sample heating temperature cannot exceed 55°C below the flash point)

　　★All devices should be placed in a place with dark indoor lighting and no significant air circulation,ａnd surrounded by wind screens on three sides.

　　★Connect the igniter to a flammable full pressure vessel(such as liquefied propane gas or natural gas)with a hose,turn the igniter to one side,test the ignition,ａnd debug the flame into the shape of a standard ball or a small ball with a diameter of 4mm±0.8mm Flame test.

　　四、試驗(yàn)步驟：

　　★開(kāi)始加熱試驗(yàn)，使升溫速度迅速地達(dá)到14℃/min~17℃/min。待試樣溫度達(dá)到預(yù)期閃點(diǎn)前56℃時(shí)，調(diào)節(jié)加熱器降低升溫速度，以便在預(yù)期閃點(diǎn)前28℃時(shí)能使升溫速度控制在5.5℃/min±0.5℃/min。

　　★試樣溫度達(dá)到預(yù)期閃點(diǎn)前28℃時(shí)開(kāi)始，每隔2℃按點(diǎn)火器按鈕一次，使點(diǎn)火器的試焰沿試驗(yàn)杯口中以150mm半徑作弧水平掃過(guò)一次，從試驗(yàn)杯口的一邊至另一邊所經(jīng)過(guò)的時(shí)間約1s。此時(shí)應(yīng)確認(rèn)點(diǎn)火器的試焰為直徑4mm±0.8mm的火球，并位于試驗(yàn)杯口上方2.5mm處。（注：試驗(yàn)時(shí)不應(yīng)對(duì)著試樣杯呼氣）

　　★當(dāng)試樣液面上A初出現(xiàn)一瞬即滅的藍(lán)色火焰，立即從溫度計(jì)上讀記溫度，作為試樣的閃點(diǎn)。注意勿將試焰四周的藍(lán)白色火焰誤認(rèn)為是閃點(diǎn)火焰。

　　★繼續(xù)加熱，保持試樣升溫速度5.5℃/min±0。5℃/min，并按上述操作要求用點(diǎn)火器點(diǎn)火試驗(yàn)。

　　★當(dāng)試樣接觸火焰立即著火，并能繼續(xù)燃燒不少于5s時(shí)，停止加熱，并讀記溫度計(jì)上的溫度，作為試樣的燃點(diǎn)。

　　★同一試樣至少平行試驗(yàn)兩次，兩次測(cè)定結(jié)果的差值不超過(guò)重復(fù)性試驗(yàn)允許差8℃時(shí)，取其平均值的整數(shù)作為試驗(yàn)結(jié)果。

　　★精密度或允許差：

　　重復(fù)性試驗(yàn)的允許差為：閃點(diǎn)8℃，燃點(diǎn)8℃；

　　復(fù)現(xiàn)性試驗(yàn)的允許差為：閃點(diǎn)16℃，燃點(diǎn)14℃。

　　Fourth,test steps:

　　★Start the heating test to make the temperature rise rate quickly reach 14℃/min~17℃/min.When the temperature of the sample reaches 56°C before the expected flash point,adjust the heater to reduce the heating rate so that the temperature can be controlled at 5.5°C/min±0.5°C/min at 28°C before the expected flash point.

　　★When the temperature of the sample reaches 28℃before the expected flash point,press the igniter button once every 2℃to make the flame of the igniter sweep horizontally along the mouth of the test cup with a radius of 150mm and from one side The elapsed time to the other side is about 1s.At this time,it should be confirmed that the test flame of the igniter is a fireball with a diameter of 4mm±0.8mm,ａnd is located 2.5mm above the mouth of the test cup.(Note:the test cup should not be exhaled during the test)

　　★When the blue flame that flashes out at the beginning of A on the sample liquid surface,immediately read the temperature from the thermometer and use it as the flash point of the sample.Be careful not to mistake the blue and white flame around the test flame as a flash point flame.

　　★Continue heating,keep the temperature rising rate of the sample at 5.5℃/min±0.5℃/min,ａnd use the igniter for ignition test according to the above operation requirements.

　　★When the sample immediately ignites upon contact with the flame and can continue to burn for no less than 5s,stop heating and read the temperature on the thermometer as the ignition point of the sample.

　　★At least two parallel tests of the same sample,the difference between the two measurement results does not exceed the allowable difference of 8℃,the integer of the average value is taken as the test result.

　　★Precision or tolerance:

　　The allowable difference of repeatability test is:flash point 8℃,ignition point 8℃;

　　The permissible difference of the reproducibility test is:flash point 16°C,ignition point 14°C.