合理選購,就(jiu)一定需要(yao)對這(zhe)個產品有一個大概的了解,上海寶試愿意為您導航;
濕度箱容積的選擇(ze):
把試(shi)(shi)(shi)(shi)品(pin)(pin)置入(ru)氣候環境(jing)(jing)箱(xiang)進行(xing)試(shi)(shi)(shi)(shi)驗時,為(wei)了保證(zheng)被(bei)試(shi)(shi)(shi)(shi)產(chan)品(pin)(pin)周圍(wei)氣氛滿足試(shi)(shi)(shi)(shi)驗規范所規定的(de)環境(jing)(jing)條件(jian),氣候箱(xiang)工作空(kong)間(jian)的(de)尺(chi)寸(cun)與(yu)被(bei)試(shi)(shi)(shi)(shi)品(pin)(pin)外廓尺(chi)寸(cun)之間(jian)應(ying)遵循以下幾點規定:被(bei)試(shi)(shi)(shi)(shi)產(chan)品(pin)(pin)的(de)體積((W×D×H)不得超過試(shi)(shi)(shi)(shi)驗箱(xiang)有(you)效工作空(kong)間(jian)的(de) 20-35(推(tui)薦選(xuan)用(yong)20),對于在試(shi)(shi)(shi)(shi)驗中發熱的(de)產(chan)品(pin)(pin)推(tui)薦選(xuan)用(yong)< 30;被(bei)試(shi)(shi)(shi)(shi)產(chan)品(pin)(pin)的(de)迎風(feng)斷(duan)面(mian)積與(yu)該斷(duan)面(mian)上試(shi)(shi)(shi)(shi)驗箱(xiang)工作腔(qiang)總面(mian)積之比不大(da)于35-50(推(tui)薦選(xuan)用(yong)35);被(bei)試(shi)(shi)(shi)(shi)產(chan)品(pin)(pin)外廓表(biao)面(mian)距試(shi)(shi)(shi)(shi)驗箱(xiang)壁的(de)距離至(zhi)少應(ying)保持100-150mm,(推(tui)薦選(xuan)用(yong)150mm);
補充知識→加濕概念:
恒溫恒濕(shi)(shi)(shi)箱(xiang)加(jia)(jia)濕(shi)(shi)(shi)的(de)(de)過(guo)(guo)程就是(shi)提高水(shui)(shui)汽壓力(li),初(chu)加(jia)(jia)濕(shi)(shi)(shi)方(fang)(fang)式就是(shi)向(xiang)試(shi)驗箱(xiang)壁噴水(shui)(shui),通過(guo)(guo)控(kong)制(zhi)(zhi)水(shui)(shui)的(de)(de)溫度(du)使表面飽和(he)濕(shi)(shi)(shi)度(du)得到(dao)控(kong)制(zhi)(zhi),這一方(fang)(fang)法出現在上世紀五十年代,但由于這種方(fang)(fang)法在對箱(xiang)壁噴水(shui)(shui)時,難(nan)以避免有水(shui)(shui)滴滴到(dao)試(shi)品(pin)上,對試(shi)品(pin)造(zao)成污染,所以蒸(zheng)氣加(jia)(jia)濕(shi)(shi)(shi)和(he)潛水(shui)(shui)盤取(qu)代了這種方(fang)(fang)法,但是(shi)這一方(fang)(fang)法還(huan)是(shi)有一些(xie)優點(dian)。雖然它(ta)的(de)(de)控(kong)制(zhi)(zhi)過(guo)(guo)渡過(guo)(guo)程較長,但系(xi)統(tong)穩定(ding)后濕(shi)(shi)(shi)度(du)波動較小,比較適合做(zuo)恒定(ding)濕(shi)(shi)(shi)熱(re)試(shi)驗。另(ling)外(wai)在加(jia)(jia)濕(shi)(shi)(shi)過(guo)(guo)程中水(shui)(shui)汽不過(guo)(guo)熱(re)不會增加(jia)(jia)系(xi)統(tong)中的(de)(de)額(e)外(wai)熱(re)量。還(huan)有,當控(kong)制(zhi)(zhi)噴淋(lin)水(shui)(shui)溫使之低于試(shi)驗要求(qiu)的(de)(de)要點(dian)溫度(du)時,噴淋(lin)水(shui)(shui)具有除濕(shi)(shi)(shi)作用。