電子萬能試驗機是否是價格越貴越合適?
瀏覽: 時間:2018.03.13 來源:東莞市恒工設備有限公司
“一(yi)分錢一(yi)分貨”這話是沒有錯,但是用戶在(zai)購買電子萬能試(shi)驗(yan)機是不是看價格(ge)越(yue)高就覺得(de)哪款適合自己(ji)呢?不是這樣(yang)的(de)。
影(ying)響(xiang)電子萬能試驗(yan)(yan)(yan)機價格(ge)的(de)因素有許多,其中任(ren)何一(yi)個配件不同都會影(ying)響(xiang)到(dao)其價格(ge),但是基本對價格(ge)影(ying)響(xiang)都不會太大,那(nei)么用(yong)戶(hu)在選(xuan)購電子萬能試驗(yan)(yan)(yan)機價格(ge)是要(yao)考(kao)慮的(de)一(yi)方面,但是最主要(yao)考(kao)慮的(de)是這臺(tai)設(she)(she)備是否適(shi)(shi)合(he)你用(yong),比如:單(dan)臂式(shi)(shi)(shi)試驗(yan)(yan)(yan)機與門式(shi)(shi)(shi)試驗(yan)(yan)(yan)機相比較(jiao)便宜一(yi)些(xie),然而(er)每(mei)個客戶(hu)需要(yao)根據自己的(de)需求選(xuan)擇(ze)自己適(shi)(shi)合(he)哪(na)種設(she)(she)備,一(yi)般軟包裝(zhuang)生產廠(chang)家會選(xuan)擇(ze)單(dan)臂式(shi)(shi)(shi)試驗(yan)(yan)(yan)機多一(yi)些(xie),因為(wei)單(dan)臂式(shi)(shi)(shi)試驗(yan)(yan)(yan)機拉力(li)(li)范圍較(jiao)小,比較(jiao)適(shi)(shi)合(he)軟包裝(zhuang)生產廠(chang)家。像(xiang)一(yi)些(xie)重(zhong)金屬的(de)企業會選(xuan)擇(ze)門式(shi)(shi)(shi)試驗(yan)(yan)(yan)機,它可以適(shi)(shi)應比較(jiao)大的(de)壓力(li)(li),所以軟包裝(zhuang)廠(chang)家的(de)話可以選(xuan)擇(ze)單(dan)臂式(shi)(shi)(shi)拉力(li)(li)試驗(yan)(yan)(yan)機,價格(ge)優惠而(er)且好(hao)用(yong)。
高低溫交變濕熱試(shi)驗箱(xiang)計量標準(zhun)
高低(di)(di)溫(wen)(wen)(wen)(wen)交變(bian)濕(shi)(shi)熱(re)試驗(yan)箱(xiang)(xiang)其(qi)功(gong)能是(shi)是(shi)仿真產(chan)品(pin)在氣(qi)候(hou)環境溫(wen)(wen)(wen)(wen)濕(shi)(shi)組合(he)(he)條件(jian)下(高低(di)(di)溫(wen)(wen)(wen)(wen)操作或儲存、溫(wen)(wen)(wen)(wen)度(du)(du)(du)(du)循環、高溫(wen)(wen)(wen)(wen)高濕(shi)(shi)、低(di)(di)溫(wen)(wen)(wen)(wen)低(di)(di)濕(shi)(shi)、結露試驗(yan)等),檢(jian)測產(chan)品(pin)本身的(de)適應能力與特性(xing)是(shi)否改變(bian)。如(ru)何選擇合(he)(he)適的(de)恒(heng)溫(wen)(wen)(wen)(wen)恒(heng)濕(shi)(shi)箱(xiang)(xiang)、高低(di)(di)溫(wen)(wen)(wen)(wen)濕(shi)(shi)熱(re)交變(bian)試驗(yan)箱(xiang)(xiang),便要從容積大(da)小、溫(wen)(wen)(wen)(wen)度(du)(du)(du)(du)范圍、濕(shi)(shi)度(du)(du)(du)(du)范圍、控制(zhi)方式(shi)、變(bian)溫(wen)(wen)(wen)(wen)速(su)率、風速(su)、溫(wen)(wen)(wen)(wen)度(du)(du)(du)(du)波動(dong)度(du)(du)(du)(du)、溫(wen)(wen)(wen)(wen)度(du)(du)(du)(du)場(chang)均(jun)勻度(du)(du)(du)(du)、濕(shi)(shi)度(du)(du)(du)(du)的(de)精度(du)(du)(du)(du)控制(zhi)及冷卻方式(shi)十個(ge)方面逐一進(jin)行選擇。
高低溫交變濕熱試(shi)(shi)驗箱的(de)相對(dui)濕度在環境試(shi)(shi)驗設備(bei)中是一個很重(zhong)(zhong)要的(de)參(can)數,合理而準(zhun)確地測(ce)量相對(dui)濕度,對(dui)于(yu)保證環境條件具有(you)重(zhong)(zhong)要意義:
1、國標GB2423.1中對(dui)高低溫(wen)交(jiao)變濕熱(re)試(shi)驗箱的(de)低溫(wen)試(shi)驗方法(fa)中規定了(le)溫(wen)度(du)(du)允許偏差(cha)(cha)范圍(wei)±3℃,在這里±3℃并不(bu)是(shi)指那一個(ge)(ge)點或是(shi)在那一時間,針對(dui)整個(ge)(ge)工作空間的(de)各點的(de)要求。還應(ying)指出的(de)另一問題是(shi)±2℃這個(ge)(ge)溫(wen)度(du)(du)容差(cha)(cha)是(shi)允許偏差(cha)(cha)的(de)概念。
2、軍標GJB150中溫(wen)(wen)(wen)(wen)(wen)度(du)梯度(du)最(zui)大2.2℃時(shi),對溫(wen)(wen)(wen)(wen)(wen)度(du)場均(jun)勻性要(yao)求是某一瞬間溫(wen)(wen)(wen)(wen)(wen)度(du)區(qu)各(ge)點溫(wen)(wen)(wen)(wen)(wen)度(du)之間的(de)關系(xi)。±2℃這個溫(wen)(wen)(wen)(wen)(wen)度(du)容差(cha),決不(bu)能看作是標稱值(zhi)的(de)設定范(fan)圍。例50±2℃:此時(shi)50℃是標稱值(zhi),±2℃則是容差(cha)在(zai)設定環境條件參數值(zhi)時(shi),溫(wen)(wen)(wen)(wen)(wen)度(du)設定值(zhi)只能是50℃,而不(bu)能是52℃,或48℃,由于控制系(xi)統漂移調整中的(de)誤差(cha)及試(shi)驗箱溫(wen)(wen)(wen)(wen)(wen)度(du)場的(de)不(bu)均(jun)勻性,試(shi)驗溫(wen)(wen)(wen)(wen)(wen)度(du)的(de)實測結果不(bu)可能是50℃,允(yun)許偏差(cha)但范(fan)圍是不(bu)超過52℃或不(bu)低于48℃
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