一、簡(jiǎn)介：

該差示掃描量熱儀為觸摸屏式，專測(cè)聚合物材料氧化誘導(dǎo)期測(cè)試,客戶一鍵式操作,軟件全自動(dòng)運(yùn)行。儀器符合G B /T 19466.3- 2004/ISO 11357-3 :1999 第6部分氧化誘導(dǎo)期 氧化誘導(dǎo)時(shí)間（等溫OIT)和氧化誘導(dǎo)溫度（動(dòng)態(tài)OIT)的測(cè)定。

氧化誘導(dǎo)時(shí)間（OIT）是測(cè)定式樣在高溫（200攝氏度）氧氣條件下開(kāi)始發(fā)生自動(dòng)催化氧化反應(yīng)的時(shí)間，是評(píng)價(jià)材料在成型加工、儲(chǔ)存、焊接和使用中耐熱降解能力的指標(biāo)。氧化誘導(dǎo)期(簡(jiǎn)稱OIT)方法是一種采用差熱分析法（DTA）以塑料分子鏈斷裂時(shí)的放熱反映為依據(jù)，測(cè)試塑料在高溫氧氣中加速老化程度的方法。其原理是：將塑料式樣與惰性參比物（如氧化鋁）置于差熱分析儀中，使其在一定溫度下用氧氣迅速置換式樣室內(nèi)地惰性氣體（如氮?dú)猓?。測(cè)試由于式樣氧化而引起的DTA曲線（差熱譜）的變化，并獲得氧化誘導(dǎo)期（時(shí)間）OIT（min),以評(píng)定塑料的防熱老化性能。儀器符合G B /T 19466.3- 2004/ISO 11357-3 :1999 第6部分氧化誘導(dǎo)期。氧化誘導(dǎo)時(shí)間（等溫OIT)和氧化誘導(dǎo)溫度（動(dòng)態(tài)OIT)的測(cè)定。氧化誘導(dǎo)期已經(jīng)被納入管道行業(yè)及電線電纜強(qiáng)檢范圍。

1. Introduction

The differential scanning calorimeter is a touch screen type, which is designed to measure the oxidation induction period test of polymer materials. It is operated by customers with one-key operation and the software runs fully automatically. The instrument complies with GB /T 19466.3-2004/ISO 11357-3:1999 Part 6 Oxidation induction period Oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) determination.

Oxidation induction time (OIT) is the time when the autocatalytic oxidation reaction of the test sample begins to occur under high temperature (200 degrees Celsius) oxygen conditions. It is an index to evaluate the heat-resistant degradation ability of the material during molding, storage, welding and use. The Oxidation Induction Period (OIT) method is a method that uses differential thermal analysis (DTA) to test the degree of accelerated aging of plastics in high-temperature oxygen based on the exothermic reaction when plastic molecular chains are broken. The principle is: Put the plastic sample and the inert reference substance (such as alumina) in the differential thermal analyzer, so that it can quickly replace the inert gas (such as nitrogen) in the sample chamber with oxygen at a certain temperature. Test the change of the DTA curve (differential thermal spectrum) caused by the oxidation of the pattern, and obtain the oxidation induction period (time) OIT (min) to evaluate the thermal aging resistance of the plastic. The instrument complies with GB /T 19466.3-2004/ISO 11357-3:1999 Part 6 Oxidation induction period. Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT). The oxidation induction period has been included in the scope of the pipeline industry and the strong inspection of wires and cables.

二、特點(diǎn)：

1、工業(yè)級(jí)別的寬屏觸摸結(jié)構(gòu)，顯示信息豐富，包括設(shè)定溫度、樣品溫度，氧氣流量，氮?dú)饬髁?，差熱信?hào)，各種開(kāi)關(guān)狀態(tài),流量歸零。

?2、USB通訊接口，通用性強(qiáng)，通信可靠不中斷，支持自恢復(fù)連接功能。

3、爐體結(jié)構(gòu)緊湊，升降溫速率任意可調(diào)。

4、改善了安裝工藝，全部采用機(jī)械固定方式，避免爐體內(nèi)部膠體對(duì)差熱信號(hào)的污染。

5、雙溫度探頭，保證樣品溫度測(cè)量的高度重復(fù)性。一路溫度探頭安裝在爐壁上，用于PID控制整個(gè)爐體的溫度，但由于溫度的熱慣性，傳導(dǎo)到樣品上的溫度有一定偏差，而且春夏秋冬偏差程度不一樣，因此，采用單溫度探頭控溫與測(cè)溫，無(wú)論是差熱信號(hào)還是溫度信號(hào)，誤差都比較大；本儀器在樣品底部多安裝了一個(gè)溫度探頭，用于測(cè)量樣品真實(shí)的溫度，并且采用了我們專用控溫技術(shù)，控制爐壁溫度使樣品溫度達(dá)到設(shè)定溫度。

6、數(shù)字氣體質(zhì)量流量計(jì)自動(dòng)切換兩路氣氛流量，切換速度快，穩(wěn)定時(shí)間短。

7、標(biāo)配標(biāo)準(zhǔn)樣品，方便客戶校正恒溫系數(shù)。

8、軟件自適應(yīng)各分辨率電腦屏幕，軟件自動(dòng)根據(jù)電腦屏幕大小調(diào)節(jié)各曲線顯示方式。支持筆記本，臺(tái)式機(jī)；支持Win2000,XP,VISTA,WIN7等操作系統(tǒng)

9、支持用戶自編程程序，實(shí)現(xiàn)測(cè)量步驟全自動(dòng)化。軟件提供數(shù)十種指令，用戶可根據(jù)自己的測(cè)量步驟，靈活組合各指令，并保存。復(fù)雜的操作就簡(jiǎn)化成一鍵操作。

2. Features

1. Industrial-grade wide-screen touch structure, rich display information, including set temperature, sample temperature, oxygen flow, nitrogen flow, differential heat signal, various switch states, and flow return to zero.

?2, USB communication interface, strong versatility, reliable and uninterrupted communication, and supports self-recovery connection function.

3. The furnace body has a compact structure, and the temperature rise and fall rate can be adjusted arbitrarily.

4. The installation process is improved, and all mechanical fixing methods are adopted to completely avoid the pollution of the differential thermal signal by the colloid inside the furnace body.

5. Double temperature probes ensure high repeatability of sample temperature measurement. A temperature probe is installed on the furnace wall to use PID to control the temperature of the entire furnace body. However, due to the thermal inertia of the temperature, the temperature transmitted to the sample has a certain deviation, and the deviation degree is different in spring, summer, autumn and winter. Therefore, a single temperature is used. Probe temperature control and temperature measurement, whether it is a differential thermal signal or a temperature signal, the error is relatively large; this instrument installs a temperature probe at the bottom of the sample to measure the true temperature of the sample, and uses our special temperature control technology. Control the furnace wall temperature so that the sample temperature reaches the set temperature.

6. The digital gas mass flow meter automatically switches the two-channel atmosphere flow, with fast switching speed and short stabilization time.

7. Standard samples are provided as standard, which is convenient for customers to calibrate the constant temperature coefficient.

8. The software adapts to the computer screen of each resolution, and the software automatically adjusts the display mode of each curve according to the size of the computer screen. Support notebook, desktop computer; support Win2000, XP, VISTA, WIN7 and other operating systems

9. Support user self-programming program to realize full automation of measurement steps. The software provides dozens of instructions, and users can flexibly combine and save the instructions according to their own measurement steps. Complex operations are simplified into one-key operations.

三、技術(shù)參數(shù)：

1:溫度范圍: 室溫~500℃

2:溫度分辨率: 0.01℃

3:升溫速率: 0.1～80℃/min

4:控溫方式：升溫，恒溫（全自動(dòng)程序控制）

5:DSC量程: 0～±500mW

6:DSC解析度: 0.001mW

7:DSC靈敏度: 0.001mW

8:工作電源: AC 220V 50Hz或定制

9：氣氛控制氣體：氮?dú)?氧氣（儀器自動(dòng)切換）

10：氣體流量：0-200mL/min

11:氣體壓力：0.2MPa

12:氣體流量精度：0.2mL/min

13:選配坩堝：鋁質(zhì)坩堝Φ6.6*3mm

14:參數(shù)標(biāo)準(zhǔn): 配有標(biāo)準(zhǔn)物質(zhì)（銦，錫，鋅），用戶可自行校正溫度和熱焓

15:數(shù)據(jù)接口：標(biāo)準(zhǔn)USB接口

16:顯示方式: 24bit色，7寸LCD觸摸屏顯示

17:輸出方式：計(jì)算機(jī)和打印機(jī)

18:重量23KG

19:外形尺寸：長(zhǎng)45cm*寬30cm*高27cm

Three, technical parameters

1: Temperature range: room temperature~500℃

2: Temperature resolution: 0.01℃

3: Heating rate: 0.1～80℃/min

4: Temperature control method: heating, constant temperature (automatic program control)

5: DSC range: 0～±500mW

6: DSC resolution: 0.001mW

7: DSC sensitivity: 0.001mW

8: Working power supply: AC 220V 50Hz or customized

9: Atmosphere control gas: nitrogen and oxygen (the instrument automatically switches)

10: Gas flow rate: 0-200mL/min

11: Gas pressure: 0.2MPa

12: Gas flow accuracy: 0.2mL/min

13: Optional crucible: aluminum crucible Φ6.6*3mm

14: Parameter standard: Equipped with standard materials (indium, tin, zinc), users can calibrate the temperature and enthalpy by themselves

15: Data interface: standard USB interface

16: Display mode: 24bit color, 7-inch LCD touch screen display

17: Output method: computer and printer

18: Weight 23KG

19: Dimensions: length 45cm*width 30cm*height 27cm