高低溫試驗箱常見問題不升溫、不恒溫應如何解決?
高低溫試驗箱的(de)(de)(de)最(zui)高溫度(du)一(yi)般是(shi)(shi)(shi)到150℃,最(zui)低(di)溫度(du)一(yi)般是(shi)(shi)(shi)到-70℃,主要是(shi)(shi)(shi)通過鎳鉻合金(jin)電(dian)加(jia)(jia)熱(re)產生高溫,如果(guo)(guo)試驗箱不(bu)升溫時,應先(xian)將(jiang)機器總(zong)電(dian)源關(guan)掉,檢查加(jia)(jia)熱(re)斷(duan)路器是(shi)(shi)(shi)否(fou)有(you)(you)(you)跳(tiao)閘,如果(guo)(guo)有(you)(you)(you)則(ze)合上(shang),如沒(mei)有(you)(you)(you),則(ze)繼(ji)續(xu)往(wang)下查,首先(xian)用(yong)萬用(yong)表的(de)(de)(de)電(dian)阻檔,測(ce)(ce)量固態(tai)繼(ji)電(dian)器的(de)(de)(de)輸(shu)出端(2腳(jiao))到N線之間是(shi)(shi)(shi)否(fou)有(you)(you)(you)約(yue)20歐的(de)(de)(de)電(dian)阻(視不(bu)同的(de)(de)(de)機型稍有(you)(you)(you)變(bian)化(hua)),如果(guo)(guo)沒(mei)有(you)(you)(you),則(ze)說(shuo)明加(jia)(jia)熱(re)絲(si)開(kai)(kai)路了(le),重(zhong)點(dian)檢查加(jia)(jia)熱(re)絲(si)是(shi)(shi)(shi)否(fou)損(sun)壞;如果(guo)(guo)加(jia)(jia)熱(re)絲(si)沒(mei)有(you)(you)(you)損(sun)壞,則(ze)打開(kai)(kai)配(pei)電(dian)箱側蓋將(jiang)機器運轉并處于(yu)升溫狀態(tai),觀察固態(tai)繼(ji)電(dian)器上(shang)的(de)(de)(de)導通指示燈是(shi)(shi)(shi)否(fou)點(dian)亮(liang),如果(guo)(guo)有(you)(you)(you)點(dian)亮(liang),則(ze)用(yong)萬用(yong)表的(de)(de)(de)電(dian)壓(ya)檔,測(ce)(ce)量固態(tai)繼(ji)電(dian)器的(de)(de)(de)輸(shu)出端(1腳(jiao))對N線是(shi)(shi)(shi)否(fou)有(you)(you)(you)220V電(dian)壓(ya),如果(guo)(guo)沒(mei)有(you)(you)(you),再往(wang)上(shang)查接觸器,如果(guo)(guo)有(you)(you)(you),再測(ce)(ce)量固態(tai)繼(ji)電(dian)器的(de)(de)(de)輸(shu)出端(2腳(jiao))對N線是(shi)(shi)(shi)否(fou)有(you)(you)(you)220V電(dian)壓(ya),如果(guo)(guo)沒(mei)有(you)(you)(you),則(ze)說(shuo)明固態(tai)繼(ji)電(dian)器內部(bu)開(kai)(kai)路損(sun)壞,須(xu)更換。
高低溫(wen)試驗箱不(bu)恒溫(wen)、波動大解(jie)決(jue)方法:
1、調整(zheng)參數,設備定(ding)(ding)值運行時(shi)實(shi)時(shi)溫(wen)度(du)接近設定(ding)(ding)溫(wen)度(du)時(shi),點(dian)擊運行畫(hua)面“AT鍵(jian),自(zi)(zi)整(zheng)定(ding)(ding)P.I.D,請耐(nai)心等(deng)待,待屏幕右(you)上角“AT”不顯爍時(shi),表示己自(zi)(zi)整(zheng)定(ding)(ding)完畢;
2、傳感器或控制器的ACU模塊有(you)損壞或不良,造成溫度不穩及波動;
3、檢查(cha)循環馬達運轉是(shi)否(fou)(fou)正常,風輪是(shi)否(fou)(fou)有卡住,導(dao)致風帶時(shi)快時(shi)慢;
4.、試驗箱(xiang)內試驗品堆放得太多(正常情(qing)況下不超過內箱(xiang)總容積的三分之一),導致風無(wu)法循環(huan),溫度(du)波(bo)動(dong)大(da)。