大型步入式恒溫試驗室大型高低試驗箱

一臺環(huan)(huan)境(jing)試(shi)(shi)驗(yan)(yan)(yan)(yan)設(she)備(bei)(bei)可能用于同(tong)(tong)(tong)一類型產(chan)品的(de)多次試(shi)(shi)驗(yan)(yan)(yan)(yan)，而一臺被試(shi)(shi)的(de)工程產(chan)品也可能在不同(tong)(tong)(tong)的(de)環(huan)(huan)境(jing)試(shi)(shi)驗(yan)(yan)(yan)(yan)設(she)備(bei)(bei)中(zhong)進行試(shi)(shi)驗(yan)(yan)(yan)(yan)，為(wei)了保證同(tong)(tong)(tong)一臺產(chan)品在同(tong)(tong)(tong)一試(shi)(shi)驗(yan)(yan)(yan)(yan)規(gui)(gui)范(fan)所(suo)規(gui)(gui)定的(de)環(huan)(huan)境(jing)試(shi)(shi)驗(yan)(yan)(yan)(yan)條件下所(suo)得試(shi)(shi)驗(yan)(yan)(yan)(yan)結果的(de)可比較性(xing)，必(bi)然要求(qiu)環(huan)(huan)境(jing)試(shi)(shi)驗(yan)(yan)(yan)(yan)設(she)備(bei)(bei)所(suo)提供的(de)環(huan)(huan)境(jing)條件具(ju)有(you)可重復性(xing)。這也就是(shi)說，環(huan)(huan)境(jing)試(shi)(shi)驗(yan)(yan)(yan)(yan)設(she)備(bei)(bei)施用于被試(shi)(shi)驗(yan)(yan)(yan)(yan)產(chan)品的(de)應(ying)力水(shui)平（如熱(re)應(ying)力、振動應(ying)力、電(dian)應(ying)力等）對(dui)于同(tong)(tong)(tong)一試(shi)(shi)驗(yan)(yan)(yan)(yan)規(gui)(gui)范(fan)的(de)要求(qiu)是(shi)*的(de)。

環(huan)(huan)境(jing)試驗(yan)設備所提供環(huan)(huan)境(jing)條件的(de)(de)(de)(de)可重(zhong)復性(xing)是由計量檢定(ding)(ding)部門依據技(ji)術監督機構所制定(ding)(ding)的(de)(de)(de)(de)檢定(ding)(ding)規(gui)程檢定(ding)(ding)合格(ge)后提供保證。為此，必須(xu)要求環(huan)(huan)境(jing)試驗(yan)設備能(neng)(neng)滿足(zu)(zu)檢定(ding)(ding)規(gui)程中的(de)(de)(de)(de)各項技(ji)術指標及精度(du)指標的(de)(de)(de)(de)要求，并(bing)且(qie)在使用(yong)時間上不(bu)超過檢定(ding)(ding)周期所規(gui)定(ding)(ding)的(de)(de)(de)(de)時限(xian)。如使用(yong)非常普遍的(de)(de)(de)(de)電動(dong)振(zhen)動(dong)臺除滿足(zu)(zu)激振(zhen)力、頻率范(fan)圍、負載(zai)能(neng)(neng)力等技(ji)術指標外，還必須(xu)滿足(zu)(zu)檢定(ding)(ding)規(gui)程中規(gui)定(ding)(ding)的(de)(de)(de)(de)橫向振(zhen)動(dong)比、臺面加速度(du)均勻(yun)性(xing)、諧波失真(zhen)度(du)等精度(du)指標的(de)(de)(de)(de)要求，而且(qie)每(mei)次檢定(ding)(ding)后的(de)(de)(de)(de)使用(yong)周期為二(er)年(nian)，超過二(er)年(nian)必須(xu)重(zhong)新檢定(ding)(ding)合格(ge)后才能(neng)(neng)投入使用(yong)。