一，低溫(wen)試驗(yan)方法

1，非(fei)散熱(re)試(shi)驗(yan)樣(yang)品(pin)溫(wen)度漸變的低溫(wen)試(shi)驗(yan)：將(jiang)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)(yang)品放(fang)入溫(wen)度(du)為試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)室(shi)溫(wen)度(du)的(de)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱中(zhong)，然后(hou)將(jiang)溫(wen)度(du)調節到(dao)符合相關規(gui)范規(gui)定(ding)(ding)的(de)嚴酷等級溫(wen)度(du)。當(dang)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)(yang)品溫(wen)度(du)達到(dao)穩(wen)(wen)(wen)定(ding)(ding)后(hou)，在(zai)(zai)該(gai)(gai)條件(jian)下(xia)暴(bao)露到(dao)規(gui)定(ding)(ding)的(de)持(chi)(chi)續(xu)時(shi)間(jian)(jian)(jian)。對于試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)時(shi)需(xu)要(yao)通電運行(xing)(xing)的(de)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)(yang)品，應在(zai)(zai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)(yang)品溫(wen)度(du)達到(dao)穩(wen)(wen)(wen)定(ding)(ding)后(hou)通電，根據(ju)需(xu)要(yao)進(jin)行(xing)(xing)功能(neng)檢(jian)測。這種情況下(xia)，可能(neng)還需(xu)要(yao)一段時(shi)間(jian)(jian)(jian)達到(dao)溫(wen)度(du)穩(wen)(wen)(wen)定(ding)(ding)，然后(hou)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)(yang)品在(zai)(zai)該(gai)(gai)低溫(wen)條件(jian)下(xia)暴(bao)露到(dao)相關規(gui)范規(gui)定(ding)(ding)的(de)持(chi)(chi)續(xu)時(shi)間(jian)(jian)(jian)。試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)(yang)品通常在(zai)(zai)非工作狀態下(xia)進(jin)行(xing)(xing)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)。本試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)通常采用高(gao)氣流循環。

2，散熱(re)試(shi)(shi)驗樣品溫度漸變的低溫試(shi)(shi)驗——試(shi)(shi)驗樣品在(zai)溫度開始穩(wen)定后通電：如(ru)果(guo)需要，可通(tong)(tong)過試(shi)(shi)驗(yan)(yan)確(que)定試(shi)(shi)驗(yan)(yan)箱能(neng)(neng)否滿足(zu)低氣流速度(du)的(de)(de)要求。將試(shi)(shi)驗(yan)(yan)樣品(pin)放入溫(wen)(wen)度(du)為試(shi)(shi)驗(yan)(yan)室溫(wen)(wen)度(du)等(deng)(deng)等(deng)(deng)試(shi)(shi)驗(yan)(yan)箱中(zhong)，然后(hou)將溫(wen)(wen)度(du)調節到符合相關(guan)規(gui)范(fan)規(gui)定的(de)(de)嚴酷等(deng)(deng)級溫(wen)(wen)度(du)。給試(shi)(shi)驗(yan)(yan)樣品(pin)通(tong)(tong)電(dian)或(huo)加(jia)電(dian)負(fu)載，檢查試(shi)(shi)驗(yan)(yan)樣品(pin)以確(que)定其(qi)功能(neng)(neng)是否符合相關(guan)規(gui)范(fan)要求。試(shi)(shi)驗(yan)(yan)樣品(pin)應按照相關(guan)規(gui)范(fan)規(gui)定的(de)(de)工作循(xun)環和負(fu)載條(tiao)件處于運行(xing)狀態。當(dang)試(shi)(shi)驗(yan)(yan)樣品(pin)的(de)(de)溫(wen)(wen)度(du)達(da)到穩定后(hou)，在該條(tiao)件下暴露到相關(guan)規(gui)范(fan)規(gui)定的(de)(de)持續時間。本(ben)試(shi)(shi)驗(yan)(yan)通(tong)(tong)常采用低氣流速度(du)循(xun)環。

3，散熱試驗(yan)樣品(pin)溫度漸變(bian)的低溫試驗(yan)——試驗(yan)樣品(pin)在整個試驗(yan)過(guo)程通(tong)電：如果(guo)需(xu)要(yao)，可(ke)通過試(shi)驗(yan)(yan)確定(ding)試(shi)驗(yan)(yan)箱能否(fou)滿(man)足低氣(qi)流(liu)速度(du)(du)的(de)要(yao)求。將試(shi)驗(yan)(yan)樣品(pin)放(fang)入溫度(du)(du)為試(shi)驗(yan)(yan)室溫度(du)(du)等(deng)等(deng)試(shi)驗(yan)(yan)箱中。給試(shi)驗(yan)(yan)樣品(pin)通電并根據需(xu)要(yao)進行功能檢測。然(ran)后將溫度(du)(du)調節到(dao)(dao)符(fu)合(he)相關規(gui)范規(gui)定(ding)的(de)嚴酷等(deng)級溫度(du)(du)。當試(shi)驗(yan)(yan)樣品(pin)的(de)溫度(du)(du)達到(dao)(dao)穩定(ding)后，在(zai)該條件(jian)下暴露(lu)到(dao)(dao)規(gui)定(ding)的(de)持(chi)續時間。本試(shi)驗(yan)(yan)通常采用低氣(qi)流(liu)速度(du)(du)循環。

 二，高溫試(shi)驗方(fang)法

1，非散熱試驗(yan)樣品溫(wen)度漸變的高溫(wen)溫(wen)試驗(yan)：將(jiang)試(shi)(shi)(shi)(shi)驗(yan)(yan)樣(yang)品(pin)(pin)放(fang)入溫(wen)(wen)(wen)度為試(shi)(shi)(shi)(shi)驗(yan)(yan)室溫(wen)(wen)(wen)度的(de)試(shi)(shi)(shi)(shi)驗(yan)(yan)箱中，然(ran)后將(jiang)溫(wen)(wen)(wen)度調節到(dao)(dao)(dao)符(fu)合相關規(gui)范規(gui)定的(de)嚴酷(ku)等級溫(wen)(wen)(wen)度。當試(shi)(shi)(shi)(shi)驗(yan)(yan)樣(yang)品(pin)(pin)溫(wen)(wen)(wen)度達(da)到(dao)(dao)(dao)穩(wen)定后，在該條件下暴露到(dao)(dao)(dao)規(gui)定的(de)持續時(shi)(shi)間(jian)。對于試(shi)(shi)(shi)(shi)驗(yan)(yan)時(shi)(shi)需要(yao)通(tong)電(dian)運行的(de)試(shi)(shi)(shi)(shi)驗(yan)(yan)樣(yang)品(pin)(pin)，應在試(shi)(shi)(shi)(shi)驗(yan)(yan)樣(yang)品(pin)(pin)溫(wen)(wen)(wen)度達(da)到(dao)(dao)(dao)穩(wen)定后通(tong)電(dian)，根據(ju)需要(yao)進行功能(neng)檢測(ce)。這種情況下，可能(neng)還需要(yao)一段時(shi)(shi)間(jian)達(da)到(dao)(dao)(dao)溫(wen)(wen)(wen)度穩(wen)定，然(ran)后試(shi)(shi)(shi)(shi)驗(yan)(yan)樣(yang)品(pin)(pin)在該高(gao)溫(wen)(wen)(wen)條件下暴露到(dao)(dao)(dao)相關規(gui)范規(gui)定的(de)持續時(shi)(shi)間(jian)。試(shi)(shi)(shi)(shi)驗(yan)(yan)樣(yang)品(pin)(pin)通(tong)常在非工(gong)作(zuo)狀態下進行試(shi)(shi)(shi)(shi)驗(yan)(yan)。本試(shi)(shi)(shi)(shi)驗(yan)(yan)通(tong)常采(cai)用高(gao)氣流(liu)循環。

2，散熱試(shi)驗(yan)樣(yang)品溫度漸變的高溫試(shi)驗(yan)——試(shi)驗(yan)樣(yang)品在升溫調節期(qi)不通(tong)電：如果需(xu)要，可通過試(shi)(shi)驗(yan)確定試(shi)(shi)驗(yan)箱能否滿足低氣流速度(du)(du)(du)的(de)(de)要求。將試(shi)(shi)驗(yan)樣(yang)品放(fang)入(ru)溫(wen)(wen)度(du)(du)(du)為試(shi)(shi)驗(yan)室溫(wen)(wen)度(du)(du)(du)等(deng)等(deng)試(shi)(shi)驗(yan)箱中，然后(hou)將溫(wen)(wen)度(du)(du)(du)調節到(dao)符合相(xiang)(xiang)關規范規定的(de)(de)嚴酷(ku)等(deng)級溫(wen)(wen)度(du)(du)(du)。給試(shi)(shi)驗(yan)樣(yang)品通電(dian)。當試(shi)(shi)驗(yan)樣(yang)品的(de)(de)溫(wen)(wen)度(du)(du)(du)達到(dao)穩(wen)定后(hou)，在該條件下暴露到(dao)相(xiang)(xiang)關規范規定的(de)(de)持續時間。本(ben)試(shi)(shi)驗(yan)通常采用低氣流速度(du)(du)(du)循(xun)環。

3，散熱試(shi)(shi)驗樣(yang)品溫度漸變的高溫試(shi)(shi)驗——試(shi)(shi)驗樣(yang)品在整(zheng)個試(shi)(shi)驗過程(cheng)通電：如果需要，可通(tong)過試(shi)(shi)(shi)驗確定(ding)(ding)試(shi)(shi)(shi)驗箱(xiang)能否滿足(zu)低氣流速度的(de)要求。將(jiang)試(shi)(shi)(shi)驗樣品放入溫度為試(shi)(shi)(shi)驗室溫度等等試(shi)(shi)(shi)驗箱(xiang)中。給試(shi)(shi)(shi)驗樣品通(tong)電(dian)并根據需要進行(xing)功能檢測(ce)。然后將(jiang)溫度調(diao)節到符合相(xiang)關規范規定(ding)(ding)的(de)嚴酷(ku)等級(ji)溫度。當試(shi)(shi)(shi)驗樣品的(de)溫度達到穩定(ding)(ding)后，在該條件下(xia)暴(bao)露到規定(ding)(ding)的(de)持續(xu)時間(jian)。本試(shi)(shi)(shi)驗通(tong)常采用低氣流速度循環。