[恒溫恒濕試驗箱]分析恒(heng)(heng)溫恒(heng)(heng)濕試驗箱(xiang)試驗后的(de)恢復與檢測步驟

　　恒(heng)溫(wen)恒(heng)濕試(shi)驗箱試(shi)驗后恢復

　　正常恒(heng)溫(wen)恒(heng)溫(wen)試(shi)(shi)(shi)驗(yan)結束后(hou)(hou)和最終通電檢(jian)測前(qian)，對(dui)(dui)試(shi)(shi)(shi)件(jian)的(de)(de)處理，都(dou)稱之為(wei)試(shi)(shi)(shi)后(hou)(hou)恢(hui)(hui)復(fu)(fu)。試(shi)(shi)(shi)后(hou)(hou)恢(hui)(hui)復(fu)(fu)目(mu)的(de)(de)是使試(shi)(shi)(shi)件(jian)狀態與(yu)(yu)初始檢(jian)測時一致，能如(ru)實確定環境應(ying)力給試(shi)(shi)(shi)件(jian)帶來的(de)(de)影響(xiang)哪(na)些是不可(ke)逆的(de)(de)。恢(hui)(hui)復(fu)(fu)條(tiao)件(jian)與(yu)(yu)正常大氣條(tiao)件(jian)一樣(yang)。但在實際試(shi)(shi)(shi)后(hou)(hou)恢(hui)(hui)復(fu)(fu)中，這(zhe)一過(guo)(guo)程往往被淡化、縮減甚至省(sheng)略。如(ru)濕熱試(shi)(shi)(shi)驗(yan)后(hou)(hou)，自然恢(hui)(hui)復(fu)(fu)一小時，就認為(wei)已經恢(hui)(hui)復(fu)(fu)至正常大氣條(tiao)件(jian);再如(ru)，低(di)溫(wen)試(shi)(shi)(shi)驗(yan)后(hou)(hou)跳(tiao)過(guo)(guo)試(shi)(shi)(shi)后(hou)(hou)恢(hui)(hui)復(fu)(fu)過(guo)(guo)程，直接進(jin)行(xing)高(gao)溫(wen)試(shi)(shi)(shi)驗(yan)，認為(wei)這(zhe)樣(yang)做省(sheng)時省(sheng)力，在高(gao)溫(wen)試(shi)(shi)(shi)驗(yan)中就對(dui)(dui)試(shi)(shi)(shi)件(jian)進(jin)行(xing)了烘干(可(ke)采(cai)用高(gao)低(di)溫(wen)試(shi)(shi)(shi)驗(yan)箱進(jin)行(xing))。殊(shu)不知，這(zhe)樣(yang)做已對(dui)(dui)試(shi)(shi)(shi)件(jian)產生了過(guo)(guo)應(ying)力，對(dui)(dui)試(shi)(shi)(shi)件(jian)的(de)(de)組件(jian)造成嚴(yan)重(zhong)影響(xiang)，給試(shi)(shi)(shi)件(jian)測試(shi)(shi)(shi)結果的(de)(de)準確性(xing)埋下隱患。

　　因(yin)此，在(zai)試后(hou)恢(hui)(hui)復(fu)實施過程中，正(zheng)確的(de)(de)做法應該是(shi)：若是(shi)濕(shi)熱試驗(yan)則結束，則應打開臬門(men)自(zi)然恢(hui)(hui)復(fu)(特殊要(yao)求(qiu)應采取(qu)條件(jian)(jian)(jian)恢(hui)(hui)復(fu))，時(shi)間(jian)(jian)不(bu)得少于(yu)12h，否(fou)則試件(jian)(jian)(jian)會凝露(lu)積水，影響最后(hou)通(tong)電檢測;若是(shi)低(di)溫(wen)試驗(yan)結束，一般應采取(qu)適當的(de)(de)恢(hui)(hui)復(fu)控制條件(jian)(jian)(jian)，以(yi)+0.4℃~+0.8℃范圍內的(de)(de)速(su)率(lv)，階梯狀變速(su)升(sheng)溫(wen)到高于(yu)室溫(wen)且低(di)于(yu)試件(jian)(jian)(jian)高溫(wen)試驗(yan)條件(jian)(jian)(jian)進行烘干，持續時(shi)間(jian)(jian)為8~12h，試件(jian)(jian)(jian)結構(gou)越復(fu)雜、體積越大，時(shi)間(jian)(jian)相應的(de)(de)也越長。烘箱結束后(hou)，應打開箱門(men)自(zi)然恢(hui)(hui)復(fu);對于(yu)總站或整機，應在(zai)條件(jian)(jian)(jian)恢(hui)(hui)復(fu)結束后(hou)，再(zai)正(zheng)常(chang)恢(hui)(hui)復(fu)大氣條件(jian)(jian)(jian)，在(zai)無具體標準規定(ding)的(de)(de)情況下(xia)，以(yi)試驗(yan)人員(yuan)的(de)(de)經驗(yan)，試驗(yan)后(hou)恢(hui)(hui)復(fu)處理(li)在(zai)正(zheng)常(chang)大氣條件(jian)(jian)(jian)下(xia)旋(xuan)轉不(bu)少于(yu)24h較好。

　　恒溫恒濕試驗箱試驗后檢測

　　試件結構方面的檢測，主要(yao)是借助(zhu)于(yu)一(yi)些儀器(qi)儀表各設備工具，觀察試件結構部(bu)分是否(fou)有(you)(you)裂(lie)紋、變形，元器(qi)件、堅(jian)固件是否(fou)有(you)(you)脫落或松動(dong)，轉動(dong)和升(sheng)降部(bu)分是否(fou)卡死或活動(dong)不暢，密封件是否(fou)脫膠(jiao)等等。

　　試件電氣(qi)部分檢(jian)測(ce)，總的原則(ze)是，“化(hua)整(zheng)為零(ling)、取大優先”。即(ji)整(zheng)機(ji)上電，通(tong)過儀器儀表檢(jian)測(ce)試件的電氣(qi)性(xing)能，如(ru)(ru)果測(ce)試結果符合(he)要求，即(ji)正常(chang)，則(ze)整(zheng)機(ji)或(huo)大系統(tong)優先通(tong)過檢(jian)測(ce)。否則(ze)，如(ru)(ru)果整(zheng)機(ji)上電出現故障，則(ze)由整(zheng)機(ji)往(wang)各系統(tong)逐(zhu)一(yi)排查(cha)，逐(zhu)一(yi)歸零(ling)，直到找(zhao)到問(wen)題所在，解決(jue)問(wen)題。

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