高低温交变湿热试验箱常见故障解决总结大纲

【概述】  高低温交变湿热试验箱常见故障解决总结大纲

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

       高低温交变湿热试验箱又名恒温恒湿试验箱、高低温湿热实验箱、温湿度循环测试箱，用于试验各种材料进行高低温恒定和渐变、突发、耐热、耐寒、耐干燥、耐湿等温湿度环境模拟的可靠性测试。通过恒温恒湿箱以测试样品在高温高湿、低温低湿、高低温循环、高温低温恒定的环境中之适应性，以判定产品的质量。 

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.

【高温升不上去】

1、在高温试验中，如温度变化达不到试验温度值时，可以检查电器系统，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、如温度升得很慢，就要查看风循环系统，看一下风循环的调节挡板是否开启正常，反之，就检查风循环的电机运转是否正常。

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、如温度过冲厉害，那么就需要整定PID的设置参数。

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

4、如果温度直接上升，过温保护，那么，控制器出故障，须更换控制仪表。 If temperature directly heating up, over-temperature protector, so the controller fault need to replace a new controller instrument.

【低温降温不下来】

1、低温达不到试验的指标，那你就要观察温度的变化，是温度降的很慢，还是温度到一定值后温度有回升的趋势，前者就要检查一下，做低温试验前是否将工作室烘干，使工作室保持干燥后再将试验样品放入工作室内再做试验，工作室内的试验样品是否放置的过多，使工作室内的风不能充分循环。再排除上述原因后，就要考虑是否是制冷系统中的故障了， 这样就要请厂家皓天的专业人员进行检修。后者的现象是设备的使用环境不好所致，设备放置的环境温度，放置的位置(箱体后与墙的距离)要满足要求(在设备操作使用说明中都有规定)。

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).

【湿度升不上去】

       湿度升不上去应该是加湿加热管没工作。检查加热管是否开路、加热回路有无断线或因为短路烧坏熔断器；如果烧坏熔断器，检修时要检查固态继电器是否被击穿; 如果主回路没问题检查控制器输出端是否损坏。

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.

【湿度降不上来】

       在做湿热试验中，出现实际湿度会达到100%或者实际湿度与目标湿度相差很大，数值低得很多。前者的现象：可能是湿球传感器上的纱布干燥引起，那就要检查湿球传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动控制的，查水位控制器供水系统是否供水正常，水位控制器工作是否正常。另一种可能就是湿球纱布因使用时间长，或供水水质纯净度的原因，会使纱布变硬，使纱布无法吸收水份而干燥，只要更换或清洗纱布即可排除以上现象。后者的现象主要是加湿系统不工作，查看加湿系统的供水系统，供水系统内是否有一定的水量，控制加湿锅炉水位的水位控制是否正常，加湿锅炉内的水位是否正常。如以上一切都正常，那就要检查电器控制系统，这要请专业维修人员进行检修。

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.