The six major maintenance details of the hot and wet test box
Because of the size of high-precision instruments, such as thermostats, which are difficult to move or move and complex electrical circuits, it is often difficult for users to do so in case of failure, so that they can quickly determine and resolve the problem themselves in a timely manner
Ningboharth test equipment ltd., inc., describes some of the programmable solutions for repair and repair of six major malfunctions in the temperature and humidity test boxes。
Fault 1. When temperature abnormalities are shown in the temperature constant wet test box temperature control
Inspection steps:
1. Check the supertemperature protection of the control panel and whether it is set at 150°c
Please check whether the circular motors in the aircraft room are not functioning
3. Check if the temperature portion of the solid relay has burned short circuits: if the heater has not burned, use three meters to exchange the voltage slot, open the voltage slot to 600 volts, place the red and black rods on both sides of the fixed relay bearing the line number t, set the temperature setting value at 0°c for the temperature segment, at which point the signal light for the solid portion of the temperature will not be activated, and if the measured voltage value remains unchanged, the burning of the solid relay below 10v will be short-circuited。
Solutions:
1. If not, transfer the panel supertemperature protection to the position of 150 °c or use the additional 30 °c temperature
2. Please notify ningbohas customer service service to replace circular motors
3. Please replace the temperature component of the solid state relay (the solid state relay marked with the line number t) or notify the ningboharth maintenance department to come and perform maintenance。
Fault ii. The actual moisture value has not been able to reach the default value and the actual wetness value is much lower than the wetting value when the thermostat temperature and humidity control is in operation。
Inspection steps:
1. Check if the solid-state relays in the wet section burned down the circuit: if the heater is not burned, use the meter to exchange the voltage slot, open the voltage slot to 600 volts, place the red and black rods on both sides of the solid relay marked h, set a 100 per cent wetness ratio for the temperature segment, at which point the signal light for the solid relay for the wet portion will be activated, and if the measured voltage values remain unchanged at 220 v or 380 v, then burn in a breakout state on behalf of the solid relay
Check whether the fuse has been burned
3. Check if the wet barrel heater is burned: two lines of the wet barrel heater are cut, a three-purpose meter om set is used to measure the resistance value, and if the resistance is infinite, the heater is burned。
Solutions:
1. Please replace the solid-state relay in the moisture section (the solid-state relay marked h) or notify ningbohath maintenance service to go to the door for maintenance
2. Please replace the same-specified fuse
Please notify ningboharth experimental equipment ltd. Of the heating of the wet bucket or the maintenance department to come to the door for maintenance。
Fault iii. When the temperature and humidity test box temperature control indicates abnormal conditions of pressure
Inspection steps:
1. Check the location of the equipment and whether it is above 30 cm from the wall
Are the surroundings closed space。
Solutions:
1. If not, maintain a position above 30 centimetres around the platform because of the high pressure side pressure of the compressor caused by heat dissipation
2. If the perimeter is enclosed, it can cause a temperature rise in the environment and overpressor pressure side pressure, so keep the perimeter ventilated。
Fault iv. When the temperature and humidity test box temperature controller shows the compressor abnormality
Inspection steps:
1. Check the location of the equipment and whether it is above 30 cm from the wall
Are the surroundings closed space。
Solutions:
1. If not, please maintain a position above 30 cm around the platform, as the dissipation of heat causes the operation of the compressor to increase the current, resulting in the operation of the current shield
2. If the perimeter is enclosed, it will cause the environment to warm up and the compressor to operate up currents, resulting in the operation of the current protector (heated voltage). So please stay ventilated
3. Once all the above questions have been resolved, please turn over the current protection (heated electrons) below the three electromagnetic switches in the room. Revert buttons to the lower pressure, one sound, representing the controlled compressor overloading, but also returned at this time, at which point the power flow is set to 1. 25 times the rated current of the compressor。
Fault 5. When the temperature test box temperature control indicates an abnormal state of humidity
Inspection steps:
1. Check whether the water supertemperator in the control room is set at 150°c
2. Check whether the pipes are dirty in the aircraft room, resulting in poor water flow
3. Check if the tank has water and, if not, whether the tank has water
4. Check whether solid relays in the wet component burn short circuits: if the heater is not burned, use three meters to exchange voltage slots, open the voltage slot to 600 volts, place the red and black rods on both sides of the fixed relay that is marked h in the line number, set a humidity ratio of 0%, at which point the signal lamps for the wet component in the solid relays will not be activated, and if the measured voltage values remain unchanged, keep short circuit status at below 10v, representing the burning of solid relays. Or set the moisture portion at 0%, then see if the drums are boiling。
Solutions:
1. If not, transfer the water supertemperator to 150°c
2. Please turn the main power supply off behind the platform and then open the drainage valve below the wet bucket to a position parallel to the pipe, and when the water is drained with the water tanks, open the wet bucket with the use of the cricket hand, which causes the water to be wet for long periods. (a) cleaning up, then removing the silica tube road, washing it in the water, after maintenance has been completed, reloading it in the reverse direction in a manner that is dismantled, and after the installation, the drainage valve below the wet drum shall be closed to the vertical position of the pipe, before opening the overall power source behind the platform
There is no water in the upper or lower tanks, but please add water to the tanks. If the tank is unwatered and if the tank is watered, the motor in the tank is damaged. Please notify ningbohath of the constant temperature and wet maintenance of the passenger service department for repairs
Please replace the solid-state relay in the wet component (the one with a line number marked h) or notify the ningboharth maintenance department to come and perform maintenance。
Fault vi. The actual humidity values have been shown at 100 per cent since the temperature and humidity test box became operational
Inspection steps:
(a) the air inside the box is very dry: (a) first, check the dry-wet-ball fixed sink section, if there is water; (b) please check the dry-wet seat inside the test box, the wet-ball gauze attached to the wet-ball sensor section, and whether it is wet in the sensor section
2. The air in the box is very humid (which may not be 100% wet, but is always high): first set the wet portion at 0% and then see if the water in the chamber is boiling。
Solutions:
1. The air inside the box is very dry: 1) if water is not available, adjust the water table cup in the room, or check whether there are any obstacles to the pipes between the water table cup and the dry and wet ball fixed seat, and then use the cloth, dry up the water and ensure that the water remains in. 2). If not wet, replace the gauze. (it is recommended to replace the gauze once a month) if high temperature and humidity conditions are frequently applied, the number of replacements will be higher, if only the temperature conditions are used to remove the gauze from the extended life. After removal, they can be immersed in alcohol and have been extended
2. The air in the box is very humid (which may not be 100 per cent wet but has been high): if boiled, replace the moist portion of the solid-state relay (the solid-state relay marked h) or notify the ningbohath maintenance department for maintenance。
Specialized r & d, production, sales: heating and weting test boxes, high-temperature cold and thermal warm boxes (two and three boxes), linear temperature and utility boxes, lamp aging test boxes, ultraviolet light aging test box, three integrated environmental test boxes, image surveyor, salt mist test box, magnetic vibration table, simulation transport vibration tables, high temperature test box, high temperature aging room, pull experiments, drop-off tests (two-wing, one-wing, cell phone drops), paper box break-intension tester, drop-ejectors, etc。
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