【概述】  高低溫交變濕熱試驗(yàn)箱常見故障解決總結(jié)大綱

High and low temperature alternating humid heat test box common fault resolution summary.

       高低溫交變濕熱試驗(yàn)箱又名恒溫恒濕試驗(yàn)箱、高低溫濕熱實(shí)驗(yàn)箱、溫濕度循環(huán)測(cè)試箱，用于試驗(yàn)各種材料進(jìn)行高低溫恒定和漸變、突發(fā)、耐熱、耐寒、耐干燥、耐濕等溫濕度環(huán)境模擬的可靠性測(cè)試。通過恒溫恒濕箱以測(cè)試樣品在高溫高濕、低溫低濕、高低溫循環(huán)、高溫低溫恒定的環(huán)境中之適應(yīng)性，以判定產(chǎn)品的質(zhì)量。 

High & low temperature alternating damp heat test equipment also named constant temperature humidity test chamber, high low temperature wet heat test chamber, temperature humidity cycle test chamber, use to simulate the reliability temperature humidity test for all materials for high and low temperature constant, shadow, break out, cold-resistant, resistance to dry, resistance to damp and like that. By the temperature humidity test chamber to test samples’ adaptation to judge its quality in the high temperature high wet, low temperature low wet, high & low temperature cycling, high temperature & low temperature constant environment.

【高溫升不上去】

1、在高溫試驗(yàn)中，如溫度變化達(dá)不到試驗(yàn)溫度值時(shí)，可以檢查電器系統(tǒng)，逐一排除故障。

High temperature can’t heat up: In the temperature test, if temperature changes can’t reach the test temperature value, then check the electrical system, and troubleshooting one by one.

2、如溫度升得很慢，就要查看風(fēng)循環(huán)系統(tǒng)，看一下風(fēng)循環(huán)的調(diào)節(jié)擋板是否開啟正常，反之，就檢查風(fēng)循環(huán)的電機(jī)運(yùn)轉(zhuǎn)是否正常。

If heat up slower, check the wind cycling system, and see the damper regulator whether is normal, whereas, check the motor running whether is abnormal.

3、如溫度過沖厲害，那么就需要整定PID的設(shè)置參數(shù)。

If temperature overshoot, will need to set the PID setting parameters.

4、如果溫度直接上升，過溫保護(hù)，那么，控制器出故障，須更換控制儀表。 If temperature directly heating up, over-temperature protector, so the controller fault need to replace a new controller instrument.

【低溫降溫不下來】

1、低溫達(dá)不到試驗(yàn)的指標(biāo)，那你就要觀察溫度的變化，是溫度降的很慢，還是溫度到一定值后溫度有回升的趨勢(shì)，前者就要檢查一下，做低溫試驗(yàn)前是否將工作室烘干，使工作室保持干燥后再將試驗(yàn)樣品放入工作室內(nèi)再做試驗(yàn)，工作室內(nèi)的試驗(yàn)樣品是否放置的過多，使工作室內(nèi)的風(fēng)不能充分循環(huán)。再排除上述原因后，就要考慮是否是制冷系統(tǒng)中的故障了， 這樣就要請(qǐng)廠家皓天的專業(yè)人員進(jìn)行檢修。后者的現(xiàn)象是設(shè)備的使用環(huán)境不好所致，設(shè)備放置的環(huán)境溫度，放置的位置(箱體后與墻的距離)要滿足要求(在設(shè)備操作使用說明中都有規(guī)定)。

Temperature won’t cool down: Low temperature can’t reach the test target, will you need to observe the temperature changes, is temperature fall down slower or temperature has a tendency to rise after reaching a certain value. If the former will need to check after doing the low temperature test, check the working cabinet whether is dry or not, the working cabinet need to keep dry and then put the sample into. Whether too much samples in the cabinet, so that wind can’t cycle in the cabinet. After eliminating a fore-mentioned reasons again, be about to consider whether is the breakdown in refrigeration system, such professional personnel that should ask a manufacturer Haotian undertakes examining and repairing. The latter phenomenon is caused by the bad operating environment of the equipment, and the environmental temperature and position (the distance between the back of the box and the wall) of the equipment should meet the requirements (it’s stipulated in the operating instructions of the equipment).

【濕度升不上去】

       濕度升不上去應(yīng)該是加濕加熱管沒工作。檢查加熱管是否開路、加熱回路有無斷線或因?yàn)槎搪窡龎娜蹟嗥?；如果燒壞熔斷器，檢修時(shí)要檢查固態(tài)繼電器是否被擊穿; 如果主回路沒問題檢查控制器輸出端是否損壞。

The humidity won’t rise: The humidifying heating tube is not working. Check whether the heating tube is open, whether the heating circuit is broken or the fuse is burnt out due to short circuit; If the fuse burns out, check whether the solid state relay is broken down during maintenance; Check the controller output for damage if the main loop is in good condition.

【濕度降不上來】

       在做濕熱試驗(yàn)中，出現(xiàn)實(shí)際濕度會(huì)達(dá)到100%或者實(shí)際濕度與目標(biāo)濕度相差很大，數(shù)值低得很多。前者的現(xiàn)象：可能是濕球傳感器上的紗布干燥引起，那就要檢查濕球傳感器的水槽中是否缺水。水槽中的水位是由一水位控制器自動(dòng)控制的，查水位控制器供水系統(tǒng)是否供水正常，水位控制器工作是否正常。另一種可能就是濕球紗布因使用時(shí)間長(zhǎng)，或供水水質(zhì)純凈度的原因，會(huì)使紗布變硬，使紗布無法吸收水份而干燥，只要更換或清洗紗布即可排除以上現(xiàn)象。后者的現(xiàn)象主要是加濕系統(tǒng)不工作，查看加濕系統(tǒng)的供水系統(tǒng)，供水系統(tǒng)內(nèi)是否有一定的水量，控制加濕鍋爐水位的水位控制是否正常，加濕鍋爐內(nèi)的水位是否正常。如以上一切都正常，那就要檢查電器控制系統(tǒng)，這要請(qǐng)專業(yè)維修人員進(jìn)行檢修。

The humidity won’t go down: In the wet & heat test, appears actual humidity will reach to 100% or the actual humidity is very different from the target humidity, and the value is much lower. The former phenomenon, may be the wet ball sensor because of the gauze drying, it is necessary to check the wet ball sensor in the sink whether water shortage. The water level in the water tank is automatically controlled by a water level controller to check whether the water supply system of the water level controller is normal and whether the water level controller works normally. Another possibility is that wet ball gauze due to the use of a long time, or the purity of water supply water, will make the gauze hard, so that the gauze can not absorb water and dry, as long as the replacement or cleaning gauze can eliminate the above phenomenon.The latter phenomenon is mainly that the humidification system does not work, check the water supply system of the humidification system, whether there is a certain amount of water in the water supply system, whether the water level control of the humidification boiler water level is normal, whether the water level in the humidification boiler is normal. If all of the above is normal, it’s necessary to check the electrical control system, this should be professional maintenance personnel for maintenance.