可重復性

一(yi)臺(tai)環(huan)(huan)境(jing)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)設備(bei)可(ke)能(neng)用(yong)(yong)于同一(yi)類型產品的(de)(de)(de)(de)多次試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，而(er)一(yi)臺(tai)被試(shi)(shi)(shi)的(de)(de)(de)(de)工(gong)程(cheng)(cheng)產品也可(ke)能(neng)在(zai)不同的(de)(de)(de)(de)環(huan)(huan)境(jing)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)設備(bei)中(zhong)進(jin)行試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，為(wei)了保證同一(yi)臺(tai)產品在(zai)同一(yi)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)規(gui)(gui)(gui)范所規(gui)(gui)(gui)定(ding)(ding)(ding)的(de)(de)(de)(de)環(huan)(huan)境(jing)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)條件下(xia)所得試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)結果(guo)的(de)(de)(de)(de)可(ke)比較性，必(bi)(bi)然要(yao)求(qiu)環(huan)(huan)境(jing)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)設備(bei)所提(ti)供(gong)(gong)的(de)(de)(de)(de)環(huan)(huan)境(jing)條件具有可(ke)重復(fu)性。這(zhe)也就是(shi)說，環(huan)(huan)境(jing)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)設備(bei)施用(yong)(yong)于被試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)產品的(de)(de)(de)(de)應(ying)(ying)力(li)(li)水平（如(ru)熱應(ying)(ying)力(li)(li)、振(zhen)(zhen)動應(ying)(ying)力(li)(li)、電(dian)應(ying)(ying)力(li)(li)等）對(dui)于同一(yi)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)規(gui)(gui)(gui)范的(de)(de)(de)(de)要(yao)求(qiu)是(shi)一(yi)致的(de)(de)(de)(de)。環(huan)(huan)境(jing)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)設備(bei)所提(ti)供(gong)(gong)環(huan)(huan)境(jing)條件的(de)(de)(de)(de)可(ke)重復(fu)性是(shi)由國(guo)家(jia)計量檢定(ding)(ding)(ding)部門(men)依據國(guo)家(jia)技(ji)(ji)術(shu)監督機構所制定(ding)(ding)(ding)的(de)(de)(de)(de)檢定(ding)(ding)(ding)規(gui)(gui)(gui)程(cheng)(cheng)檢定(ding)(ding)(ding)合格后(hou)提(ti)供(gong)(gong)保證。為(wei)此，必(bi)(bi)須要(yao)求(qiu)環(huan)(huan)境(jing)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)設備(bei)能(neng)滿足(zu)檢定(ding)(ding)(ding)規(gui)(gui)(gui)程(cheng)(cheng)中(zhong)的(de)(de)(de)(de)各(ge)項技(ji)(ji)術(shu)指(zhi)標及精(jing)(jing)度(du)指(zhi)標的(de)(de)(de)(de)要(yao)求(qiu)，并且在(zai)使(shi)用(yong)(yong)時間上不超過檢定(ding)(ding)(ding)周期(qi)所規(gui)(gui)(gui)定(ding)(ding)(ding)的(de)(de)(de)(de)時限(xian)。如(ru)使(shi)用(yong)(yong)非常普遍(bian)的(de)(de)(de)(de)電(dian)動振(zhen)(zhen)動臺(tai)除滿足(zu)激振(zhen)(zhen)力(li)(li)、頻率范圍、負載能(neng)力(li)(li)等技(ji)(ji)術(shu)指(zhi)標外，還必(bi)(bi)須滿足(zu)檢定(ding)(ding)(ding)規(gui)(gui)(gui)程(cheng)(cheng)中(zhong)規(gui)(gui)(gui)定(ding)(ding)(ding)的(de)(de)(de)(de)橫(heng)向振(zhen)(zhen)動比、臺(tai)面加速度(du)均勻性、諧波(bo)失真度(du)等到精(jing)(jing)度(du)指(zhi)標的(de)(de)(de)(de)要(yao)求(qiu)，恒(heng)溫恒(heng)濕試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)箱生產廠家(jia)，而(er)且每次檢定(ding)(ding)(ding)后(hou)的(de)(de)(de)(de)使(shi)用(yong)(yong)周期(qi)為(wei)二年，超過二年必(bi)(bi)須重新檢定(ding)(ding)(ding)合格后(hou)才能(neng)投入使(shi)用(yong)(yong)。

可程式恒溫恒濕(shi)試驗(yan)箱(xiang)、高低溫試驗(yan)箱(xiang)、恒溫恒濕(shi)試驗(yan)箱(xiang)常見問(wen)題及故障維修(xiu)的解決方案

一(yi)、電器(qi)部分無電源：

外接(jie)電源(yuan)是否接(jie)好(hao)(hao)/電壓是否正常(chang)重(zhong)新接(jie)好(hao)(hao)；電源(yuan)進(jin)線(xian)(xian)/連線(xian)(xian)接(jie)觸是否良(liang)好(hao)(hao)；電源(yuan)保險接(jie)觸是否良(liang)好(hao)(hao)/是否燒毀損壞(huai)重(zhong)新安裝(zhuang)/更換保險芯(座)。

二、整機無法啟：

動連線接(jie)(jie)(jie)觸是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)良好(hao)重(zhong)(zhong)新接(jie)(jie)(jie)好(hao)，主令(ling)開關接(jie)(jie)(jie)觸是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)良好(hao)/是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)燒(shao)(shao)毀(hui)(hui)損(sun)壞(huai)維(wei)修(xiu)/更(geng)換(huan)；接(jie)(jie)(jie)觸器(qi)(qi)或繼電(dian)(dian)器(qi)(qi)接(jie)(jie)(jie)觸是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)良好(hao)/是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)燒(shao)(shao)毀(hui)(hui)損(sun)壞(huai)；表超(chao)溫設(she)(she)置是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)正確(que)/是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)燒(shao)(shao)毀(hui)(hui)損(sun)壞(huai)重(zhong)(zhong)新設(she)(she)置/更(geng)換(huan)；電(dian)(dian)源進線(相序繼電(dian)(dian)器(qi)(qi))相序連接(jie)(jie)(jie)是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)正確(que)/是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)燒(shao)(shao)毀(hui)(hui)損(sun)壞(huai)重(zhong)(zhong)新連接(jie)(jie)(jie)/更(geng)換(huan)；壓力控制器(qi)(qi)壓力調(diao)整是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)正確(que)/是(shi)(shi)(shi)(shi)(shi)(shi)否(fou)(fou)燒(shao)(shao)毀(hui)(hui)損(sun)壞(huai)重(zhong)(zhong)新調(diao)整/更(geng)換(huan)。

三、無加熱：

連(lian)線接觸(chu)是(shi)否良(liang)好(hao)重新接好(hao)；儀表顯示是(shi)否正(zheng)常/是(shi)否有輸出維修/更換；儀表設置是(shi)否正(zheng)確重新設置。

鼓(gu)風開關(guan)是(shi)否(fou)開/是(shi)否(fou)燒(shao)(shao)(shao)毀(hui)損壞/接(jie)觸器(qi)是(shi)否(fou)接(jie)通或燒(shao)(shao)(shao)壞重(zhong)新開/更換(huan)(huan)；加(jia)熱(re)(re)開關(guan)是(shi)否(fou)開/接(jie)觸是(shi)否(fou)良(liang)好/是(shi)否(fou)燒(shao)(shao)(shao)毀(hui)損壞開/維修(xiu)/更換(huan)(huan)；執行元件(jian)(接(jie)觸器(qi)、繼(ji)電器(qi)、可控硅、固態繼(ji)電器(qi))是(shi)否(fou)有輸出更換(huan)(huan)；執行元件(jian)(加(jia)熱(re)(re)管(guan)、加(jia)熱(re)(re)絲)是(shi)否(fou)燒(shao)(shao)(shao)毀(hui)損壞更換(huan)(huan)；控制器(qi)、調節器(qi)、電接(jie)點(dian)溫度計(ji)控制是(shi)否(fou)良(liang)好/是(shi)否(fou)燒(shao)(shao)(shao)毀(hui)損壞維修(xiu)/更換(huan)(huan)。

濕(shi)度(du)(du)表示的方法很多，就(jiu)試驗設備而言，通常用(yong)相(xiang)對濕(shi)度(du)(du)這一概念描述濕(shi)度(du)(du)。相(xiang)對濕(shi)度(du)(du)的定義(yi)是指空氣(qi)中(zhong)(zhong)水(shui)汽(qi)(qi)分(fen)(fen)壓力與該溫(wen)度(du)(du)下水(shui)的飽(bao)(bao)(bao)(bao)和(he)汽(qi)(qi)壓之比并用(yong)百分(fen)(fen)數表示。由水(shui)汽(qi)(qi)飽(bao)(bao)(bao)(bao)和(he)壓力性質可(ke)知，水(shui)汽(qi)(qi)的飽(bao)(bao)(bao)(bao)和(he)壓力只是溫(wen)度(du)(du)的函數，與水(shui)汽(qi)(qi)可(ke)處的空氣(qi)壓力無關(guan)，人們通過大量的實驗和(he)整(zheng)理尋求到了(le)表示水(shui)汽(qi)(qi)飽(bao)(bao)(bao)(bao)和(he)壓力與溫(wen)度(du)(du)之間的關(guan)系，其(qi)中(zhong)(zhong)已被工程(cheng)和(he)計量大量采用(yong)的應(ying)當是戈夫格列其(qi)公(gong)式。它被氣(qi)象部門(men)編制濕(shi)度(du)(du)查(cha)算表所采用(yong)。

加(jia)(jia)濕(shi)(shi)(shi)(shi)的(de)(de)(de)過(guo)(guo)程(cheng)實際上(shang)就是(shi)(shi)(shi)提(ti)高水(shui)(shui)(shui)(shui)汽分壓(ya)(ya)力，開(kai)(kai)始的(de)(de)(de)加(jia)(jia)濕(shi)(shi)(shi)(shi)方(fang)(fang)式(shi)就是(shi)(shi)(shi)向(xiang)試(shi)驗(yan)箱(xiang)壁噴(pen)(pen)淋(lin)水(shui)(shui)(shui)(shui)，恒(heng)(heng)(heng)(heng)溫(wen)恒(heng)(heng)(heng)(heng)濕(shi)(shi)(shi)(shi)試(shi)驗(yan)箱(xiang)，通(tong)(tong)過(guo)(guo)控(kong)(kong)制(zhi)(zhi)水(shui)(shui)(shui)(shui)溫(wen)使水(shui)(shui)(shui)(shui)表(biao)面飽和壓(ya)(ya)力得到控(kong)(kong)制(zhi)(zhi)。箱(xiang)壁表(biao)面的(de)(de)(de)水(shui)(shui)(shui)(shui)形(xing)成(cheng)較(jiao)(jiao)(jiao)大的(de)(de)(de)面，在(zai)這(zhe)個面上(shang)向(xiang)箱(xiang)內(nei)通(tong)(tong)過(guo)(guo)擴散(san)的(de)(de)(de)方(fang)(fang)式(shi)向(xiang)箱(xiang)內(nei)加(jia)(jia)入水(shui)(shui)(shui)(shui)汽壓(ya)(ya)使試(shi)驗(yan)箱(xiang)中(zhong)相對(dui)(dui)濕(shi)(shi)(shi)(shi)度(du)升高，這(zhe)一(yi)(yi)(yi)方(fang)(fang)法出現在(zai)上(shang)世紀(ji)五(wu)十年代。由(you)于當時(shi)對(dui)(dui)濕(shi)(shi)(shi)(shi)度(du)的(de)(de)(de)控(kong)(kong)制(zhi)(zhi)主(zhu)要是(shi)(shi)(shi)用水(shui)(shui)(shui)(shui)i銀電(dian)接(jie)點式(shi)導電(dian)表(biao)進行簡單的(de)(de)(de)開(kai)(kai)關(guan)量調節(jie)，對(dui)(dui)于大滯(zhi)后的(de)(de)(de)熱(re)水(shui)(shui)(shui)(shui)箱(xiang)水(shui)(shui)(shui)(shui)溫(wen)的(de)(de)(de)控(kong)(kong)制(zhi)(zhi)適應性較(jiao)(jiao)(jiao)差(cha)，因此(ci)控(kong)(kong)制(zhi)(zhi)的(de)(de)(de)過(guo)(guo)渡過(guo)(guo)程(cheng)較(jiao)(jiao)(jiao)長，不(bu)(bu)(bu)能實現交變濕(shi)(shi)(shi)(shi)熱(re)對(dui)(dui)加(jia)(jia)濕(shi)(shi)(shi)(shi)量要求較(jiao)(jiao)(jiao)多(duo)的(de)(de)(de)需要，更重要地(di)是(shi)(shi)(shi)在(zai)對(dui)(dui)箱(xiang)壁噴(pen)(pen)淋(lin)的(de)(de)(de)時(shi)候，不(bu)(bu)(bu)可避免地(di)有(you)水(shui)(shui)(shui)(shui)滴淋(lin)在(zai)試(shi)品上(shang)對(dui)(dui)試(shi)品形(xing)成(cheng)不(bu)(bu)(bu)同程(cheng)度(du)的(de)(de)(de)污染。同時(shi)對(dui)(dui)箱(xiang)內(nei)排水(shui)(shui)(shui)(shui)也(ye)有(you)一(yi)(yi)(yi)定的(de)(de)(de)要求。這(zhe)一(yi)(yi)(yi)方(fang)(fang)法很快(kuai)就被蒸汽加(jia)(jia)濕(shi)(shi)(shi)(shi)和淺水(shui)(shui)(shui)(shui)盤加(jia)(jia)濕(shi)(shi)(shi)(shi)所取代。但(dan)是(shi)(shi)(shi)這(zhe)一(yi)(yi)(yi)方(fang)(fang)法還(huan)是(shi)(shi)(shi)有(you)一(yi)(yi)(yi)些優點。雖然(ran)它(ta)的(de)(de)(de)控(kong)(kong)制(zhi)(zhi)過(guo)(guo)渡過(guo)(guo)程(cheng)較(jiao)(jiao)(jiao)長，恒(heng)(heng)(heng)(heng)溫(wen)恒(heng)(heng)(heng)(heng)濕(shi)(shi)(shi)(shi)試(shi)驗(yan)箱(xiang)報價，但(dan)系統(tong)穩定后濕(shi)(shi)(shi)(shi)度(du)波動(dong)較(jiao)(jiao)(jiao)小，比較(jiao)(jiao)(jiao)適合做恒(heng)(heng)(heng)(heng)定濕(shi)(shi)(shi)(shi)熱(re)試(shi)驗(yan)。另外(wai)在(zai)加(jia)(jia)濕(shi)(shi)(shi)(shi)過(guo)(guo)程(cheng)中(zhong)水(shui)(shui)(shui)(shui)汽不(bu)(bu)(bu)過(guo)(guo)熱(re)不(bu)(bu)(bu)會(hui)增加(jia)(jia)系統(tong)中(zhong)的(de)(de)(de)額外(wai)熱(re)量。還(huan)有(you)，當控(kong)(kong)制(zhi)(zhi)噴(pen)(pen)淋(lin)水(shui)(shui)(shui)(shui)溫(wen)使之(zhi)低于試(shi)驗(yan)要求的(de)(de)(de)要點溫(wen)度(du)時(shi)，恒(heng)(heng)(heng)(heng)溫(wen)恒(heng)(heng)(heng)(heng)濕(shi)(shi)(shi)(shi)試(shi)驗(yan)箱(xiang)生產商，噴(pen)(pen)淋(lin)水(shui)(shui)(shui)(shui)具有(you)除濕(shi)(shi)(shi)(shi)作用。

隨著濕(shi)(shi)熱(re)試驗由恒定濕(shi)(shi)熱(re)向(xiang)交(jiao)變(bian)濕(shi)(shi)熱(re)發展(zhan)，要求(qiu)有較快的加(jia)濕(shi)(shi)反應能力，噴淋加(jia)濕(shi)(shi)已不能滿足(zu)要求(qiu)時，蒸汽(qi)加(jia)濕(shi)(shi)和淺水盤加(jia)濕(shi)(shi)方法(fa)開始(shi)大量被采用并得(de)到發展(zhan)。