SamplePreparationTypically,titaniumandzirconiumsamplesarechemicallyetchedtoremovesurfacecontaminationwhenoxygenandnitrogenaredetermined.However,etchingcanintroducehydrogenintothesample.ASTMmethodE1409"DeterminationofOxygenandNitrogeninTitaniumandTitaniumAlloysbytheInertGasFusionTechnique",asupdatedin1996,permitseitheretchingorabrading(filing)ofthetestspecimen.ASTME1447"DeterminationofHydrogeninTitaniumandTitaniumAlloysbytheInertGasFusionThermalConductivity/InfraredDetectionMethod"permitssurfacepreparationbyabrading(ifnecessarytoremovecontamination).DifferencesinsamplepreparationpresentsomewhatofadilemmaregardingsimultaneousdeterminationofO,N,andHintitanium.However,abradingsampleswithafiletoremovesurfacecontaminationwillyieldaccurateO,N,andHresults.TheONH836utilizesahigh-powerelectrodefurnacetoquicklyandefficientlyreleasethetargetgasesfromwithinthesample,whichallowsforaveryrapidsimultaneousdeterminationofoxygen,nitrogen,andhydrogen.分析儀,就選上海禹重實業(yè)有限公司,有需要可以聯(lián)系我司哦!新疆美國LECO分析儀廠家報價
SamplePreparationSamplingandsamplepreparationisanimportantissuebecausetraditionalmethodsusedtoobtainsamplesforoxygenandnitrogendeterminationaredifferentfromthoserecommendedforhydrogen,especiallywhensamplingmoltenmetal.Themaindifferenceinsteelsamplingproceduresforoxygen/nitrogenandhydrogenisduetothemobilityofhydrogen.Specialprecautionsmustbeusedwhensamplingforhydrogen.Frommoltensteelandiron,asamplemustbequicklyquenchedincoldwaterandchilledinarefrigerantsuchasliquefiednitrogenoramixtureofacetoneandsolidcarbondioxideinordertoreducelossesofhydrogenfromdiffusion.Lossesofoxygenandnitrogenfromdiffusionarenotaproblem.Asamplethatistakenforhydrogenandchilledinarefrigerantcanalsobeusedforoxygenandnitrogendetermination.However,asamplethatistypicallytakenforoxygenand/ornitrogendeterminationisnotsuitableforhydrogendeterminationduetohydrogenloss(diffusion).Surfacecontaminationmustberemovedbyfilingorlightgrinding,usingcarenottooverheatthesample.上海LECO氧氮氫分析儀供應商分析儀,就選上海禹重實業(yè)有限公司,讓您滿意,有想法可以來我司咨詢!
Procedure-SolidSamplesInstrumentcalibration/driftcorrection.Placethecalibration/driftstandardina***NickelBasket,andifapplicable,placethesampleintotheappropriateautoloaderposition.PresstheAnalyzebuttonontheinstrumentscreen.Afterashortdelay,theloadingheadslide-blockwillopen.Note:samplesusingautomationshouldbeplacedintheappropriateautoloaderpositionbeforestartingtheanalysissequence.Oncethesequencehasstarted,theautomaticanalysiswillstartandendautomatically.
美國LECO力可氧氮氫分析儀ONH836(氧氮氫聯(lián)測儀)系列硬件部分特點和優(yōu)勢1、爐頭區(qū)域LED照明系統(tǒng)2、爐頭快速拆裝的粉塵過濾裝置3、裝有自動旁路閥的可快速拆裝氧水捕集裝置4、的動態(tài)流量補償(DFC)保證熱導池氣體流量、壓力恒定5、改進的紅外檢測池技術(shù) 新紅外池的恒溫絕熱技術(shù)消除了外界環(huán)境溫度的干擾 長壽命的紅外發(fā)射光源和無漂移的電路設(shè)計保證紅外檢測池的長期穩(wěn)定 氧高低雙量程采用3個碳紅外檢測器,同時檢測一氧化碳和二氧化碳,保證準確定量 6、高效脈沖爐冷卻系統(tǒng) 強力內(nèi)循環(huán)水冷裝置 雙直流風扇保證持續(xù)冷卻,不受電壓波動的影響 新電極爐頭設(shè)計,提高脈沖爐熱交換效率 7、全自動分析系統(tǒng)(可選) 自動清掃裝置 20位或100位全自動分析系統(tǒng) 高速全自動真空除塵裝置直接將粉塵排至儀器外部捕集器中,消除環(huán)境污染分析儀,就選上海禹重實業(yè)有限公司,用戶的信賴之選,有需求可以來電咨詢!
氧氮氫分析儀的常見故障及解決方法儀器啟動時顯示。沒有水流。系統(tǒng)分析電流切斷,分析停止。這是水流探測器不正常,水泵不工作,管道堵塞。將儀器的右面板取下,觀察水流探測器,用手擠壓補水塑料水瓶,發(fā)現(xiàn)水流正常,顯示正常,證明水流探測器正常,管道暢通。啟動循環(huán)水泵,但分析儀顯示沒有水流,此時可判定水泵不正常。打開水泵轉(zhuǎn)子密封口,啟動泵發(fā)現(xiàn)電機正常運轉(zhuǎn),此時關(guān)閉進水,拆下水泵,發(fā)現(xiàn)葉輪脫落。經(jīng)了解,判定是由于外部冷卻水停水,儀器內(nèi)循環(huán)水溫過高(水溫應≤70℃),致使葉輪(葉輪材料PVC)熱脹并脫軸。用粘合劑粘合葉輪后再粘于葉輪軸上,待粘合劑凝固后試車,儀器運行正常。上海禹重實業(yè)有限公司分析儀獲得眾多用戶的認可。安徽分析儀價格
分析儀,就選上海禹重實業(yè)有限公司,有需求可以來電咨詢!新疆美國LECO分析儀廠家報價
氧氮氫分析儀的常見故障及解決方法供電正常、通訊正常,點擊確認鍵后分析儀不工作。這是沒有水流,爐子溫度太高或儀器通道電壓不正常。如沒有水流,爐子溫度太高這些信息會顯示在顯示器畫面上,但沒有信息顯示說明這兩項正常。接下來檢查儀器通道零位電壓,如果比±3V高出1V以上,可能是因為氣瓶空了,或者是空氣進入到分析儀中。檢查并更換化學試劑,如果有空氣進入熱導池里,熱導池的電壓就會<-6V,此時打開右面的門,堵住爐子氣體進口,10s后,熱導池電壓值必然升高。經(jīng)過逐一排查,**終確認堿石棉有問題,更換后儀器正常。新疆美國LECO分析儀廠家報價