美國(guó)分析儀采購(gòu)

Procedure – Powder/Chip Samples

Determine the instrument blank.

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

Repeat steps 2b through 2g a minimum of three times.

Set the blank following the procedure outlined in the operator's instruction manual.

Instrument calibration/drift correction.

Login a minimum of three Standard reps.

Weigh approximately *** grams of a calibration/drift standard into a *** Nickel Capsule; enter the mass and standard identification into appropriate rep fields. If applicable, place the nickel capsule in the appropriate autoloader position.

Cornerstone氫氧氮分析軟件同時(shí)支持***的書記文檔格式和可變的報(bào)告格式。美國(guó)分析儀采購(gòu)

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.

美國(guó)分析儀采購(gòu)強(qiáng)力內(nèi)循環(huán)水冷裝置。

氧氮?dú)浞治鰞x的原理：分析樣品在惰性氣流存在下于石墨坩堝中加熱熔融，其中脈沖爐溫度可自由設(shè)定，并通過一個(gè)非接觸式的光學(xué)溫度傳感器進(jìn)行實(shí)時(shí)監(jiān)控，用于實(shí)現(xiàn)樣品的完全分解，反應(yīng)所生成的CO H2和N2被帶入到具有高穩(wěn)定性和靈敏度的檢測(cè)系統(tǒng)進(jìn)行檢測(cè)。對(duì)于CO的檢測(cè)采用的是非色散性紅外檢測(cè)器，對(duì)于N2和H2的檢測(cè)則采用熱導(dǎo)檢測(cè)器。

氧氮?dú)浞治鰞x的特點(diǎn)：快速準(zhǔn)確分析，自動(dòng)化操作；精密氣體校準(zhǔn)；CO紅外檢測(cè)器，高分辨率和重現(xiàn)性的N、H熱導(dǎo)池檢測(cè)器；同一臺(tái)儀器實(shí)現(xiàn)熔融提取和熱提??；熱提取分析時(shí)間可調(diào)；可自由選擇溫度*高達(dá)2500 °C；光學(xué)溫度計(jì)溫度測(cè)定和控制；所有檢測(cè)器自動(dòng)調(diào)零/自動(dòng)水平控制（ALC）；數(shù)據(jù)評(píng)估的自動(dòng)優(yōu)化選擇范圍；爐自動(dòng)清潔和坩堝自動(dòng)進(jìn)樣（可選）；外設(shè)電腦進(jìn)行操作和控制；樣品信息保存； 所有樣品數(shù)據(jù)可追蹤查詢；通過FTP或本地局域網(wǎng)進(jìn)行數(shù)據(jù)傳輸； ON，H分析輕松切換。

Procedure – Powder/Chip Samples

Instrument calibration/drift correction.

Press the Analyze button on the instrument screen. After a short delay, the loading head slide-block will open.

Place the Nickel Capsule containing the sample into the open port at the top of the loading head.

Press the Analyze button on the instrument screen again, the loading head slide-block will close and the lower electrode will open.

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

Instrument calibration/drift correction.

a. Login a minimum of 3 Standard replicates.

b. Weigh a ~1.000 gram of a calibration/drift standard, enter the mass and standard identification into appropriate replicate fields.

c. Press the Analyze button on the instrument screen. After a short delay, the loading head slide-block will open.

d. Place the calibration/drift standard into the open port at the top of the loading head.

e. Press the Analyze button on the instrument screen again, the loading head slide-block will close and the lower electrode will open.

試樣加載過程中完全密閉，消除大氣的中可能帶來的雜質(zhì)的污染。江蘇氧氮?dú)浞治鰞x

高級(jí)診斷程序包括全數(shù)字化的在線操作手冊(cè)、維護(hù)模擬演示、圖片說明等提供快速指導(dǎo)。美國(guó)分析儀采購(gòu)

Sample Preparation

Typically, titanium and zirconium samples are chemically etched to remove surface contamination when oxygen and nitrogen are determined. However, etching can introduce hydrogen into the sample.

ASTM method E 1409 "Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert

Gas Fusion Technique", as updated in 1996, permits either etching or abrading (filing) of the test specimen.

ASTM E 1447 "Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal

Conductivity/Infrared Detection Method" permits surface preparation by abrading (if necessary to remove

contamination). Differences in sample preparation present somewhat of a dilemma regarding simultaneous

determination of O, N, and H in titanium. However, abrading samples with a file to remove surface

contamination will yield accurate O, N, and H results. The ONH836 utilizes a high-power electrode furnace to quickly and efficiently release the target gases from within the sample, which allows for a very rapid simultaneous determination of oxygen, nitrogen, and hydrogen.