溫度、濕度試驗箱(xiang)有(you)恒定濕熱(re)試驗箱(xiang)、交變濕熱(re)試驗箱(xiang)兩種情(qing)況。普通的恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)濕(shi)(shi)試(shi)驗箱一般指的是可(ke)程(cheng)式恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)濕(shi)(shi)試(shi)驗箱，其(qi)控制(zhi)方式為：設(she)定一個目標溫(wen)(wen)(wen)(wen)(wen)度、濕(shi)(shi)度點(dian)，試(shi)驗箱具有(you)(you)自(zi)動(dong)恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)到目標溫(wen)(wen)(wen)(wen)(wen)度、濕(shi)(shi)度點(dian)的能力。高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)交變(bian)濕(shi)(shi)熱試(shi)驗箱具有(you)(you)設(she)定一條(tiao)(tiao)或者多(duo)條(tiao)(tiao)高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)變(bian)化、循環的程(cheng)序，試(shi)驗箱有(you)(you)能力根(gen)據(ju)預(yu)置的曲線完成(cheng)試(shi)驗過程(cheng)，并且可(ke)以在zui大升(sheng)溫(wen)(wen)(wen)(wen)(wen)、降(jiang)溫(wen)(wen)(wen)(wen)(wen)速(su)率(lv)能力的范圍(wei)內，控制(zhi)升(sheng)溫(wen)(wen)(wen)(wen)(wen)、降(jiang)溫(wen)(wen)(wen)(wen)(wen)的速(su)率(lv)，即(ji)可(ke)以根(gen)據(ju)設(she)定的曲線的斜(xie)率(lv)控制(zhi)升(sheng)溫(wen)(wen)(wen)(wen)(wen)、降(jiang)溫(wen)(wen)(wen)(wen)(wen)速(su)率(lv)。同樣，高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)交變(bian)濕(shi)(shi)熱試(shi)驗箱也具有(you)(you)預(yu)置溫(wen)(wen)(wen)(wen)(wen)度、濕(shi)(shi)度曲線，并且根(gen)據(ju)預(yu)置進行控制(zhi)的能力。

恒(heng)定(ding)濕(shi)熱(re)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱是指(zhi)設定(ding)一組溫濕(shi)度(du)條件，即進行單組試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)，不(bu)可循環變(bian)(bian)化(hua)。當(dang)然(ran)，交變(bian)(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱都具(ju)有恒(heng)定(ding)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱的(de)(de)(de)功能，但交變(bian)(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱的(de)(de)(de)制(zhi)(zhi)造成本(ben)較高(gao)，因(yin)為(wei)交變(bian)(bian)濕(shi)熱(re)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱需配置有曲線(xian)自動記錄裝置、程序控制(zhi)(zhi)儀(yi)，還須解(jie)決試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱在工作室(shi)內溫度(du)較高(gao)的(de)(de)(de)情況下開啟制(zhi)(zhi)冷機等問題，因(yin)此(ci)，高(gao)低溫交變(bian)(bian)濕(shi)熱(re)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱的(de)(de)(de)價(jia)格(ge)比(bi)恒(heng)定(ding)濕(shi)熱(re)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱的(de)(de)(de)價(jia)格(ge)一般要高(gao)20%以上。因(yin)此(ci)，我們(men)應當(dang)實事求(qiu)是的(de)(de)(de)以試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)方法(fa)的(de)(de)(de)需要為(wei)出發點，選用(yong)恒(heng)定(ding)濕(shi)熱(re)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱或者是交變(bian)(bian)濕(shi)熱(re)老化(hua)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱。