高低溫測試箱的溫度波動度設定

高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)測(ce)試(shi)箱(xiang)(xiang)（又稱高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)循環(huan)試(shi)驗(yan)(yan)箱(xiang)(xiang)）的(de)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)、濕(shi)度(du)(du)試(shi)驗(yan)(yan)箱(xiang)(xiang)有(you)高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)定(ding)(ding)試(shi)驗(yan)(yan)箱(xiang)(xiang)、高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)交(jiao)變試(shi)驗(yan)(yan)箱(xiang)(xiang)兩種情況。普通的(de)高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)測(ce)試(shi)箱(xiang)(xiang)一(yi)般指的(de)是恒(heng)(heng)定(ding)(ding)高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)試(shi)驗(yan)(yan)箱(xiang)(xiang)，其控制(zhi)方式為：設定(ding)(ding)一(yi)個(ge)目(mu)標(biao)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)，試(shi)驗(yan)(yan)箱(xiang)(xiang)具有(you)自動恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)到目(mu)標(biao)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)點(dian)的(de)能力。恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)濕(shi)試(shi)驗(yan)(yan)箱(xiang)(xiang)的(de)控制(zhi)方式也類似，設定(ding)(ding)一(yi)個(ge)目(mu)標(biao)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)、濕(shi)度(du)(du)點(dian)，試(shi)驗(yan)(yan)箱(xiang)(xiang)具有(you)自動恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)到目(mu)標(biao)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)、濕(shi)度(du)(du)點(dian)的(de)能力。

高(gao)、低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)交變試(shi)驗(yan)箱具有(you)設定一(yi)條(tiao)或者多條(tiao)高(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)變化(hua)、循(xun)環的(de)程(cheng)序，試(shi)驗(yan)箱有(you)能(neng)力根(gen)據預置(zhi)的(de)曲線(xian)(xian)完成試(shi)驗(yan)過(guo)程(cheng)，并且可以(yi)(yi)在zui大升溫(wen)(wen)(wen)(wen)(wen)(wen)、降溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)率(lv)(lv)能(neng)力的(de)范圍內，控制升溫(wen)(wen)(wen)(wen)(wen)(wen)、降溫(wen)(wen)(wen)(wen)(wen)(wen)的(de)速(su)率(lv)(lv)，即(ji)可以(yi)(yi)根(gen)據設定的(de)曲線(xian)(xian)的(de)斜率(lv)(lv)控制升溫(wen)(wen)(wen)(wen)(wen)(wen)、降溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)率(lv)(lv)。同樣，高(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)交變濕(shi)熱試(shi)驗(yan)箱也具有(you)預置(zhi)溫(wen)(wen)(wen)(wen)(wen)(wen)度、濕(shi)度曲線(xian)(xian)，并且根(gen)據預置(zhi)進(jin)行控制的(de)能(neng)力。

 溫(wen)度波動(dong)度是一個比較容易實現的(de)參數，所有(you)環境試(shi)驗(yan)(yan)(yan)設備廠家（科(ke)文試(shi)驗(yan)(yan)(yan)設備高低(di)溫(wen)測試(shi)箱）的(de)多數試(shi)驗(yan)(yan)(yan)箱實際的(de)溫(wen)度波動(dong)都可以(yi)(yi)控(kong)制(zhi)在±0.3℃的(de)范圍以(yi)(yi)內。

科文高低溫(wen)(wen)測(ce)(ce)試(shi)(shi)(shi)箱溫(wen)(wen)度(du)均勻(yun)度(du)，為(wei)了(le)更正確地模(mo)擬產品(pin)在(zai)(zai)(zai)自然界所遭受的實際(ji)環(huan)(huan)境(jing)狀況，在(zai)(zai)(zai)環(huan)(huan)境(jing)試(shi)(shi)(shi)驗中必(bi)須保證被試(shi)(shi)(shi)產品(pin)在(zai)(zai)(zai)周邊處在(zai)(zai)(zai)同一溫(wen)(wen)度(du)環(huan)(huan)境(jing)條件下，為(wei)此，必(bi)須對試(shi)(shi)(shi)驗箱內的溫(wen)(wen)度(du)梯度(du)和溫(wen)(wen)度(du)的波動度(du)加(jia)以限制。在(zai)(zai)(zai)國軍(jun)(jun)標GJB150.1-86軍(jun)(jun)設(she)備(bei)環(huan)(huan)境(jing)試(shi)(shi)(shi)驗方(fang)法(fa)總則(ze)中明確規定“試(shi)(shi)(shi)驗樣品(pin)附(fu)近測(ce)(ce)量系統的溫(wen)(wen)度(du)應在(zai)(zai)(zai)試(shi)(shi)(shi)驗溫(wen)(wen)度(du)的±2℃以內，其(qi)溫(wen)(wen)度(du)不超過1℃/m或總的zui大值為(wei)2.2℃"。