恒溫(wen)(wen)恒濕試驗機是一款模擬(ni)環(huan)境(jing)中高(gao)低溫(wen)(wen)濕熱環(huan)境(jing)對產品進行環(huan)境(jing)適(shi)應性(xing)試驗*的(de)(de)硬件設備。定期校(xiao)準溫(wen)(wen)濕度偏差是保證設備性(xing)能(neng)指標有(you)效性(xing)的(de)(de)常用(yong)手段。今天上海寶試檢測設備有(you)限公(gong)司為大家(jia)分(fen)享(xiang)一下影(ying)響(xiang)溫(wen)(wen)濕準度準確性(xing)的(de)(de)原因和解(jie)決方法(fa):
1、校準項(xiang)目(mu)(mu)包括溫度(du)(du)(du)偏(pian)差、溫度(du)(du)(du)均勻(yun)度(du)(du)(du)、溫度(du)(du)(du)波(bo)動度(du)(du)(du),其(qi)中溫度(du)(du)(du)偏(pian)差用(yong)于設備(bei)內箱中心(xin)點(dian)溫度(du)(du)(du)與設備(bei)顯示屏上所(suo)顯示溫度(du)(du)(du)的偏(pian)離情況,該項(xiang)目(mu)(mu)隱蔽性強,是更容易出現問題的項(xiang)目(mu)(mu),所(suo)以(yi)需(xu)要使用(yong)人員重點(dian)關注。
2、在(zai)(zai)實際工作中,操作人員在(zai)(zai)選(xuan)擇校(xiao)準(zhun)(zhun)溫(wen)(wen)(wen)度時,可能會選(xuan)擇能體現恒(heng)溫(wen)(wen)(wen)恒(heng)濕箱溫(wen)(wen)(wen)度范圍的極限(xian)溫(wen)(wen)(wen)度和常用(yong)溫(wen)(wen)(wen)度進行校(xiao)準(zhun)(zhun),認為只要在(zai)(zai)這些溫(wen)(wen)(wen)度點的溫(wen)(wen)(wen)度偏差滿足測試所(suo)需標準(zhun)(zhun),則該設(she)備其他溫(wen)(wen)(wen)度點偏差都滿足標準(zhun)(zhun),實際上(shang)有局限(xian)性,不一定適用(yong)所(suo)有產(chan)品。
3、恒溫恒濕箱溫度偏(pian)差變(bian)化(hua)的主要原因分別(bie)為:溫度測量系統(tong)、電器控制(zhi)系統(tong)、制(zhi)冷、加熱(re)系統(tong)和孔循環系統(tong)等四個部分,如(ru)圖所示:
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