浙江LECO氧氮?dú)浞治鰞x采購

736 Series: Oxygen/Nitrogen by Inert Gas Fusion

The 736 family of Elemental Analyzers is designed for routine measurement of oxygen and nitrogen content of

inorganic materials, ferrous and nonferrous alloys, andrefractory materials using the inert gas fusion technique.

These instruments feature our Cornerstone brand ® software, a custom interface designed specifically for

touch-screen operation. Developed by combining longterm research with customer feedback, this easy-to-use

software gives you complete access to instrument control, analysis settings, diagnostics, reporting, and more—without sacrificing valuable bench space.

雙直流風(fēng)扇保證持續(xù)冷卻，不受電壓波動(dòng)的影響。浙江LECO氧氮?dú)浞治鰞x采購

氧氮?dú)浞治鰞x的優(yōu)點(diǎn)

采用惰氣熔融技術(shù)，同時(shí)測(cè)定氧、氮和氫元素含量

新設(shè)計(jì)封閉氣路系統(tǒng)，優(yōu)化氣路循環(huán)，使氧氮?dú)錅y(cè)量更準(zhǔn)確

可采用更廉價(jià)的氬氣作為載氣

催化爐溫度可調(diào)，使氧的測(cè)量更加準(zhǔn)確

氣路系統(tǒng)都采用電磁閥控制，新增分段式漏氣檢測(cè)

水冷樣品加樣端口，有效隔絕雜質(zhì)氣體侵入

儀器配置和氧、氮、氫測(cè)量范圍可靈活選擇

新設(shè)計(jì)的高靈敏度紅外檢測(cè)池和熱導(dǎo)池，有極低的檢出限

分析時(shí)間短

脈沖爐功率高達(dá)8.5kw，溫度3000℃

顆粒狀樣品無需膠囊包裹，使用經(jīng)濟(jì)實(shí)惠

化學(xué)試劑及管路隱藏在門后（可移除）

強(qiáng)大的分析軟件（支持?jǐn)?shù)據(jù)和應(yīng)用報(bào)告導(dǎo)出、增加評(píng)論區(qū)及其他更多功能）。

單點(diǎn)和多點(diǎn)校正（線性回歸）

可采用自來水、冷卻循環(huán)水機(jī)或交換機(jī)冷卻

新設(shè)計(jì)的產(chǎn)品可用于各類生產(chǎn)控制和實(shí)驗(yàn)室。

Method Selection

Two methods are described in this application note; either method can be used to analyze iron, steel, nickel-, and cobalt-base alloys. The Precision Method is recommended for general use and will provide the best precision and accuracy throughout the typical O, N, and H concentrations found in this group of metals; approximate cycle time is 3.5 minutes. The Fast Track method can be used where speed of analysis is a critical component; for example, when molten metal is being sampled and results are required in the shortest possible time. This method will produce suitable results for most samples; approximate cycle time is 2.25 minutes. As noted above, sampling and sample preparation are key elements to accurate O, N, and Hdetermination as well. It is up to the user to determine which method best meets their needs.

氧氮?dú)浞治鰞x的使用注意事項(xiàng)：

1 、氧氮?dú)浞治鰞x在初次啟用前，應(yīng)該對(duì)連接點(diǎn)、焊點(diǎn)、閥門等進(jìn)行檢漏，以確?？諝庵械难醪粫?huì)反滲進(jìn)入管道及儀器內(nèi)部，造成測(cè)量數(shù)值偏高。

2、再次使用儀器前，要進(jìn)行管道系統(tǒng)凈化，將漏入的空氣除干凈，同時(shí)確保連接取樣管路時(shí)沒有漏入空氣。

3、樣氣中氧含量的變化會(huì)受管道材質(zhì)及表面粗糙度影響，因此一般連接管路選用銅管或拋光過的不銹鋼管，而不用塑料管、橡膠管等。

4、微量元素分析時(shí)，要避免各種管件、閥門、表頭等死角對(duì)樣氣造成污染，因此必須盡可能的簡(jiǎn)化氣路系統(tǒng)，連接件死角要小，以防止溶解氧逸出造成污染，使用水封、油封及臘封等設(shè)備，才能較好的確保數(shù)據(jù)的。

長(zhǎng)壽命的紅外發(fā)射光源和無漂移的電路設(shè)計(jì)保證紅外檢測(cè)池的長(zhǎng)期穩(wěn)定性。

Instrument calibration/drift correction

f. Clean the upper and lower electrode manually, or, if applicable, remove the crucible and press the analyze button to clean with the automatic cleaner.

g. Firmly place a graphite crucible on the lower electrode tip.

h. Press the Analyze button on the instrument screen, the lower electrode will close and the analysis sequence will start and end automatically.

i. Repeat steps 3b through 3h a minimum of three times for each calibration/drift standard used.

. Calibrate/drift following the procedure outlined in the operator's instruction manual.

全自動(dòng)分析系統(tǒng)、打印機(jī)、天平、遠(yuǎn)程診斷。浙江LECO氧氮?dú)浞治鰞x采購

Sample Preparation

Sampling and sample preparation is an important issue because traditional methods used to obtain samples for oxygen and nitrogen determination are different from those recommended for hydrogen, especially when sampling molten metal. The main difference in steel sampling procedures for oxygen/nitrogen and hydrogen is due to the mobilityof hydrogen. Special precautions must be used when sampling for hydrogen. From molten steel and iron, a sample must be quickly quenched in cold water and chilled in a refrigerant such as liquefied nitrogen or a mixture of acetone and solid carbon dioxide in order to reduce losses of hydrogen from diffusion. Losses of oxygen and nitrogen from diffusion are not a problem. A sample that is taken for hydrogen and

chilled in a refrigerant can also be used for oxygen and nitrogen determination. However, a sample that is typically taken for oxygen and/or nitrogen determination is not suitable for hydrogen determination due to hydrogen loss (diffusion). Surface contamination must be removed by filing or light grinding, using care not to overheat the sample.

浙江LECO氧氮?dú)浞治鰞x采購