技術文章
Technical articles電熱恒溫培養箱使用方法(fa)
1、通(tong)電前,先檢查培養箱的(de)電氣性能(neng),并應注意是否有斷路或漏電現象。
2、電熱培養(yang)(yang)箱系列(lie)待一切(qie)準(zhun)備就緒(xu),可放入試品,關上箱門,適當(dang)調(diao)節排氣閥;隔水(shui)式培養(yang)(yang)箱在通電前(qian)必須先加(jia)水(shui),水(shui)位高低上指(zhi)示不(bu)要超過水(shui)位指(zhi)示線,下(xia)水(shui)位要顯示得出。
3、若是指針式表,緩慢轉動調(diao)整器,使(shi)電表指在“0”處(chu),把設(she)定(ding)(ding)(ding)(ding)鈕(niu)的白色標注線對準所需要的溫(wen)(wen)(wen)度(du)(du)值。合(he)上電(dian)源開關(guan)至“開”處(chu),儀(yi)(yi)(yi)表(biao)(biao)(biao)綠(lv)燈(deng)亮(liang)(liang)(liang)(liang),此(ci)箱(xiang)(xiang)(xiang)(xiang)開始(shi)(shi)(shi)加(jia)熱(re)(re),隨著箱(xiang)(xiang)(xiang)(xiang)溫(wen)(wen)(wen)上升,溫(wen)(wen)(wen)度(du)(du)指示(shi)(shi)針能及(ji)時(shi)(shi)(shi)顯示(shi)(shi)測量(liang)溫(wen)(wen)(wen)度(du)(du)值。當達到(dao)設(she)定(ding)(ding)(ding)(ding)值時(shi)(shi)(shi),儀(yi)(yi)(yi)表(biao)(biao)(biao)紅燈(deng)亮(liang)(liang)(liang)(liang),此(ci)箱(xiang)(xiang)(xiang)(xiang)停止加(jia)熱(re)(re),溫(wen)(wen)(wen)度(du)(du)逐漸(jian)下降(jiang);當降(jiang)到(dao)設(she)定(ding)(ding)(ding)(ding)值時(shi)(shi)(shi),儀(yi)(yi)(yi)表(biao)(biao)(biao)又轉至綠(lv)燈(deng)亮(liang)(liang)(liang)(liang),箱(xiang)(xiang)(xiang)(xiang)內升溫(wen)(wen)(wen)。周(zhou)而復始(shi)(shi)(shi),可使(shi)溫(wen)(wen)(wen)度(du)(du)保持(chi)在設(she)定(ding)(ding)(ding)(ding)值附近。時(shi)(shi)(shi)間比(bi)例(li)調節(jie)的儀(yi)(yi)(yi)表(biao)(biao)(biao),當進入比(bi)例(li)帶后,儀(yi)(yi)(yi)表(biao)(biao)(biao)指示(shi)(shi)燈(deng)忽亮(liang)(liang)(liang)(liang)忽熄(xi);反(fan)復多次,應紅燈(deng)亮(liang)(liang)(liang)(liang),此(ci)箱(xiang)(xiang)(xiang)(xiang)不加(jia)熱(re)(re)。當設(she)定(ding)(ding)(ding)(ding)高(gao)于(yu)(yu)(yu)室溫(wen)(wen)(wen)時(shi)(shi)(shi),應綠(lv)燈(deng)亮(liang)(liang)(liang)(liang),此(ci)箱(xiang)(xiang)(xiang)(xiang)開始(shi)(shi)(shi)加(jia)熱(re)(re),隨著箱(xiang)(xiang)(xiang)(xiang)溫(wen)(wen)(wen)上升,當達到(dao)設(she)定(ding)(ding)(ding)(ding)值時(shi)(shi)(shi),儀(yi)(yi)(yi)表(biao)(biao)(biao)紅燈(deng)亮(liang)(liang)(liang)(liang),此(ci)箱(xiang)(xiang)(xiang)(xiang)停止加(jia)熱(re)(re),溫(wen)(wen)(wen)度(du)(du)逐漸(jian)下降(jiang);當降(jiang)到(dao)設(she)定(ding)(ding)(ding)(ding)值,儀(yi)(yi)(yi)表(biao)(biao)(biao)又轉至綠(lv)燈(deng)亮(liang)(liang)(liang)(liang),箱(xiang)(xiang)(xiang)(xiang)內升溫(wen)(wen)(wen)。周(zhou)而復始(shi)(shi)(shi),以下同于(yu)(yu)(yu)提針式表(biao)(biao)(biao)。當采用時(shi)(shi)(shi)間比(bi)例(li)、過零、移(yi)相調節(jie)功(gong)能的儀(yi)(yi)(yi)表(biao)(biao)(biao)時(shi)(shi)(shi),面板上有“手(shou)動再調”式上限設(she)定(ding)(ding)(ding)(ding)的電(dian)位(wei)器,用于(yu)(yu)(yu)當加(jia)熱(re)(re)系統平衡時(shi)(shi)(shi),因負載加(jia)熱(re)(re)功(gong)率(lv)的大小,至使(shi)產生實測值高(gao)于(yu)(yu)(yu)或低于(yu)(yu)(yu)設(she)定(ding)(ding)(ding)(ding)的靜差修正(zheng),調節(jie)該電(dian)位(wei)器,即可消除偏(pian)差,以適應不同情況(kuang)。
4、溫(wen)度恒溫(wen)時(shi),其溫(wen)度往(wang)往(wang)會繼(ji)續(xu)上升,這是余(yu)熱(re)影響,此(ci)現象約90分鐘后趨于穩定。
5、物品放(fang)置箱內不(bu)宜(yi)過擠,以(yi)便冷(leng)熱空(kong)氣(qi)對流(liu)不(bu)受(shou)阻塞,以(yi)保持箱內溫度均勻。