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高低温湿热试验箱的故障排除方法

日期:2021-07-21 16:27
浏览次数:109
摘要:
 
  1.高低温湿热试验箱故障在高温试验(yan)中(zhong),如温度(du)变化(hua)达不到试验(yan)温度(du)值时(shi),可以检查电器系(xi)统(tong),逐一排除故障。如温度(du)升得很慢,就要查看(kan)风循(xun)环(huan)系(xi)统(tong),看(kan)一下风循(xun)环(huan)的(de)调节(jie)挡(dang)板是否开启(qi)正(zheng)常(chang),反(fan)之,就检查风循(xun)环(huan)的(de)电机运转(zhuan)是否正(zheng)常(chang)。如温度(du)过冲厉(li)害那(nei)么就需要整(zheng)定PID 的(de)设置参数。如果温度(du)直接上升,过温保护(hu),那(nei)么,控(kong)(kong)制器出故障,须更换控(kong)(kong)制仪表。
  2.低温(wen)(wen)达(da)不(bu)到(dao)试验(yan)的(de)(de)(de)(de)(de)指标,那你就(jiu)要观(guan)察温(wen)(wen)度的(de)(de)(de)(de)(de)变化(hua),是(shi)(shi)(shi)(shi)温(wen)(wen)度降的(de)(de)(de)(de)(de)很慢(man),还是(shi)(shi)(shi)(shi)温(wen)(wen)度到(dao)一(yi)定值后(hou)温(wen)(wen)度有回升的(de)(de)(de)(de)(de)趋(qu)势(shi),前(qian)者(zhe)就(jiu)要检查一(yi)下,做低温(wen)(wen)试验(yan)前(qian)是(shi)(shi)(shi)(shi)否(fou)(fou)将工(gong)(gong)作(zuo)室(shi)烘(hong)干,使(shi)(shi)工(gong)(gong)作(zuo)室(shi)保持干燥后(hou)再将试验(yan)样(yang)品放(fang)入工(gong)(gong)作(zuo)室(shi)内再做试验(yan),工(gong)(gong)作(zuo)室(shi)内的(de)(de)(de)(de)(de)试验(yan)样(yang)品是(shi)(shi)(shi)(shi)否(fou)(fou)放(fang)置(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)过多,使(shi)(shi)工(gong)(gong)作(zuo)室(shi)内的(de)(de)(de)(de)(de)风(feng)不(bu)能(neng)充(chong)分循环,在排除上述原因后(hou),就(jiu)要考(kao)虑(lv)是(shi)(shi)(shi)(shi)否(fou)(fou)是(shi)(shi)(shi)(shi)制冷系统中的(de)(de)(de)(de)(de)故障了,这样(yang)就(jiu)要请(qing)厂家的(de)(de)(de)(de)(de)专业(ye)人员(yuan)进行检修。后(hou)者(zhe)的(de)(de)(de)(de)(de)现(xian)象是(shi)(shi)(shi)(shi)设(she)备的(de)(de)(de)(de)(de)使(shi)(shi)用环境(jing)不(bu)好(hao)所致,设(she)备放(fang)置(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)环境(jing)温(wen)(wen)度,放(fang)置(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)位置(zhi)(zhi)(zhi)(箱体后(hou)与墙(qiang)的(de)(de)(de)(de)(de)距(ju)离)要满(man)足要求(在设(she)备操作(zuo)使(shi)(shi)用说明中都有规定)。
  3.在(zai)做湿(shi)(shi)热试验(yan)中(zhong),出现实际湿(shi)(shi)度(du)会达(da)到100%或者实际湿(shi)(shi)度(du)与(yu)目标湿(shi)(shi)度(du)相(xiang)差很大,数值低(di)得很多,前者的现象:可(ke)(ke)能是(shi)(shi)(shi)湿(shi)(shi)球(qiu)传感器上(shang)的纱(sha)布干燥(zao)引起(qi),那(nei)(nei)就要检(jian)查(cha)湿(shi)(shi)球(qiu)传感器的水(shui)(shui)(shui)(shui)槽中(zhong)是(shi)(shi)(shi)否(fou)(fou)缺水(shui)(shui)(shui)(shui),水(shui)(shui)(shui)(shui)槽中(zhong)的水(shui)(shui)(shui)(shui)位是(shi)(shi)(shi)由一(yi)(yi)水(shui)(shui)(shui)(shui)位控(kong)(kong)制(zhi)(zhi)器自动控(kong)(kong)制(zhi)(zhi)的,查(cha)水(shui)(shui)(shui)(shui)位控(kong)(kong)制(zhi)(zhi)器供(gong)水(shui)(shui)(shui)(shui)系(xi)统(tong)是(shi)(shi)(shi)否(fou)(fou)供(gong)水(shui)(shui)(shui)(shui)正(zheng)(zheng)常(chang)(chang),水(shui)(shui)(shui)(shui)位控(kong)(kong)制(zhi)(zhi)器工(gong)(gong)作(zuo)是(shi)(shi)(shi)否(fou)(fou)正(zheng)(zheng)常(chang)(chang)。另一(yi)(yi)种可(ke)(ke)能就是(shi)(shi)(shi)湿(shi)(shi)球(qiu)纱(sha)布因使(shi)(shi)用时(shi)间长,或供(gong)水(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)质纯净度(du)的原因,会使(shi)(shi)纱(sha)布变硬,使(shi)(shi)纱(sha)布无法吸收水(shui)(shui)(shui)(shui)份而干燥(zao),只要更(geng)换(huan)或清洗(xi)纱(sha)布即可(ke)(ke)排(pai)除(chu)以上(shang)现象。后者的现象主要是(shi)(shi)(shi)加(jia)(jia)湿(shi)(shi)系(xi)统(tong)不工(gong)(gong)作(zuo),查(cha)看(kan)加(jia)(jia)湿(shi)(shi)系(xi)统(tong)的供(gong)水(shui)(shui)(shui)(shui)系(xi)统(tong),供(gong)水(shui)(shui)(shui)(shui)系(xi)统(tong)内(nei)是(shi)(shi)(shi)否(fou)(fou)有一(yi)(yi)定的水(shui)(shui)(shui)(shui)量,控(kong)(kong)制(zhi)(zhi)加(jia)(jia)湿(shi)(shi)锅炉水(shui)(shui)(shui)(shui)位的水(shui)(shui)(shui)(shui)位控(kong)(kong)制(zhi)(zhi)是(shi)(shi)(shi)否(fou)(fou)正(zheng)(zheng)常(chang)(chang),加(jia)(jia)湿(shi)(shi)锅炉内(nei)的水(shui)(shui)(shui)(shui)位是(shi)(shi)(shi)否(fou)(fou)正(zheng)(zheng)常(chang)(chang)。如以上(shang)一(yi)(yi)切都正(zheng)(zheng)常(chang)(chang),那(nei)(nei)就要检(jian)查(cha)电器控(kong)(kong)制(zhi)(zhi)系(xi)统(tong),这(zhei)要请专业维(wei)修人员进行检(jian)修。
  4.设备(高低(di)温湿热试(shi)(shi)(shi)验箱(xiang))在试(shi)(shi)(shi)验运行过程中突然出现故障时,控制仪表上出现对应的(de)故障显示(shi)提(ti)示(shi)并有声讯报警(jing)提(ti)示(shi)。操(cao)作(zuo)人(ren)员可以(yi)对照设备的(de)操(cao)作(zuo)使用(yong)中的(de)故障排除一章(zhang)中快速检(jian)查出属于(yu)哪一类故障,即(ji)可请专业人(ren)员快速排除故障,以(yi)确(que)保(bao)试(shi)(shi)(shi)验的(de)正常进行。
  其它环境试验设备在使用中还会有其它的现象,那就要具体现象,具体分析和排除。环境试验设备还要定期进行维护保养,制冷系统的冷凝器定期清理,对于活动部件应按说明书加油润滑,电器控制系统定期维护检查等等,这些工作是必不可少的。




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