潤滑脂滴點（寬溫(wen)度范圍）的不確定度分析(xi)

1.操作步驟:

將潤(run)滑(hua)脂(zhi)(zhi)裝入脂(zhi)(zhi)杯,放入試(shi)(shi)(shi)(shi)管中(zhong),試(shi)(shi)(shi)(shi)管放在預先設置恒溫(wen)(wen)的(de)鋁塊(kuai)(kuai)爐(lu)中(zhong)。試(shi)(shi)(shi)(shi)管中(zhong)放置溫(wen)(wen)度(du)(du)(du)計(ji)(ji)，溫(wen)(wen)度(du)(du)(du)計(ji)(ji)不與(yu)潤(run)滑(hua)脂(zhi)(zhi)接觸(chu)，在同試(shi)(shi)(shi)(shi)樣無接觸(chu)的(de)條件下測(ce)量(liang)試(shi)(shi)(shi)(shi)管內溫(wen)(wen)度(du)(du)(du)。當(dang)試(shi)(shi)(shi)(shi)管內溫(wen)(wen)度(du)(du)(du)升高(gao)到第一(yi)滴(di)(di)潤(run)滑(hua)脂(zhi)(zhi)試(shi)(shi)(shi)(shi)樣從脂(zhi)(zhi)杯中(zhong)滴(di)(di)落到試(shi)(shi)(shi)(shi)管底(di)部時(shi),記錄溫(wen)(wen)度(du)(du)(du)計(ji)(ji)顯示(shi)溫(wen)(wen)度(du)(du)(du),作(zuo)為觀測(ce)滴(di)(di)點,精確(que)至1℃。同時(shi)記錄鋁塊(kuai)(kuai)爐(lu)的(de)溫(wen)(wen)度(du)(du)(du)，精確(que)至1℃。取鋁塊(kuai)(kuai)爐(lu)的(de)溫(wen)(wen)度(du)(du)(du)與(yu)試(shi)(shi)(shi)(shi)管中(zhong)溫(wen)(wen)度(du)(du)(du)計(ji)(ji)溫(wen)(wen)度(du)(du)(du)差的(de)三分之一(yi)作(zuo)為修正系數，與(yu)觀測(ce)滴(di)(di)點相加，即(ji)為潤(run)滑(hua)脂(zhi)(zhi)試(shi)(shi)(shi)(shi)樣的(de)滴(di)(di)點。

2.不確定來源

對檢(jian)測(ce)結果有影響的量有:(1）重復測(ce)量引入的不(bu)確定度(du)u, ;

(2）溫(wen)度(du)(du)計(ji)的分辨力引(yin)入的不確(que)定(ding)度(du)(du)u, ;(3）爐溫(wen)的均勻性(xing)引(yin)入的不確(que)定(ding)度(du)(du)u, ;