How to Conduct Accurate Humidity and Temperature Testing with the Right Equipment

The Temperature Humidity Chamber is a kind of humidity testing equipment , used to test the range of material structure and composite materials that can be tolerated in a continuous environment of extremely low temperature or high temperature, and to test the chemical change damage caused by thermal expansion and contraction. instrument. Equipment capable of testing correctly for chamber temperature and humidity.

The role of Temperature Humidity Chamber:
1. Cooling function
The compressor of the Temperature Humidity Chamber is the heart of the refrigeration system. The test instrument sucks the low-temperature and low-pressure gas, turns it into a high-temperature and high-pressure gas, and forms a liquid through condensation, and releases heat, which is taken away by the fan of the instrument. Therefore, the instrument The following is the hot air factor, followed by the throttling flow to the low-pressure liquid, so it also passes through the evaporator to become a low-temperature and low-pressure gas and returns to the compressor.

2. Dehumidification and humidification functions
The refrigeration system is completed by the factors that determine the dehumidification system. The evaporator is placed in the high and low temperature humidity and heat test chamber. Because it is relatively cold, the high humidity gas in the equipment will become liquid when it sees cold objects condensed. The high-humidity gas in the chamber becomes less, so as to achieve the purpose of dehumidification.

3. Heating function:
The heating setting is one of the keys to control whether the Temperature Humidity Chamber has a temperature rise. When the controller receives a temperature rise instruction, it will output a voltage to the relay, and about 3-12 volts of DC are added to the top of the solid state relay. The AC of the device terminal is equal to the wire connected,

At this point and at the same time, the contactor will also pull in, and there will be voltage on both sides of the heater to make it generate heat, and the heat will be driven into the chamber by the circulating fan, so that the temperature of the instrument will rise, so the temperature will quickly reach the predetermined value set by the customer.

How does the Temperature Humidity Chamber control the temperature and humidity?
The Temperature Humidity Chamber is to place the product at the specified temperature and humidity, depending on the product’s high temperature resistance, low temperature resistance, and humidity resistance, then the high and low temperature humidity and heat test chamber has the ability to heat, cool, humidify, and dehumidify at the same time.

The heating device of the Temperature Humidity Chamber is the key link to control whether the Temperature Humidity Chamber is heated up; it is the controller that will output voltage to the relay when it receives the temperature rise command, and about 3-12 volts of direct current is applied to the solid state relay; its AC The terminal is equivalent to the connection of the wire;

The contactor also pulls in at the same time, there is voltage at both ends of the heater to make it generate heat, and the heat is brought into the chamber through the circulation fan to heat up the high and low temperature damp heat test chamber, and the temperature will soon reach your set value;

The controller is adjusted by adding solid-state relays on and off; we adjust the heat output by watching the heating output on the screen in the high and low temperature humidity and heat test chamber; this is temperature control above 89 degrees, how to control the temperature below 89 degrees? The high and low temperature humidity and heat test chamber is on one side through the solid-state relay to generate heat; on the other hand, the compressor refrigeration cycle is used to cool down to achieve dynamic balance; the temperature is constant.

The cooling of the Temperature Humidity Chamber is an important part of the Temperature Humidity Chamber, and it is an important parameter to judge the performance of a Temperature Humidity Chamber. It includes four major components: a compressor, a condenser, a throttling device, and an evaporator.

The compressor is the heart of the refrigeration system. It inhales low-temperature and low-pressure gas, turns it into high-temperature and high-pressure gas, releases heat by condensing into liquid, and takes away the heat through the fan. Therefore, the hot air is under the Temperature Humidity Chamber, and then it is reduced to low pressure by throttling. The liquid, then passes through the evaporator to become a low-temperature and low-pressure gas, and finally returns to the compressor;

The refrigerant absorbs heat in the evaporator to complete the gasification process and absorb heat to achieve the purpose of refrigeration and complete the cooling process of the Temperature Humidity Chamber.

The humidification system of the Temperature Humidity Chamber is roughly the same as the heating system; it is a process in which the heater heats water into steam; it completes the humidification purpose of the Temperature Humidity Chamber.

The dehumidification system of the Temperature Humidity Chamber is also completed by the refrigeration system. The evaporator is placed in the Temperature Humidity Chamber; it is relatively cold, and the high humidity gas in the high and low temperature humidity and heat test chamber meets cold objects and condenses into liquid; so repeated the chamber There will be very little high-humidity gas to achieve the purpose of dehumidification.

The Temperature Humidity Chamber is suitable for checking the moisture resistance and temperature resistance of electrical and electronic products, components, parts and materials under different temperature and humidity conditions, and can also test various performance parameters of the test products.

1. Over-temperature alarm.
The equipment is equipped with an independent over-temperature protection thermostat, and the over-temperature alarm is generally caused by the following problems:
(1) The setting of the over-temperature protection thermostat is too low due to an operation failure, just increase the setting of the over-temperature protection thermostat.
(2) The temperature value displayed on the instrument has exceeded the original set temperature value, which may be caused by the breakdown of the temperature control element, instrument failure or control circuit failure.

2. Overpressure alarm.
(1) The pressure value set by the pressure controller inside the equipment is incorrect. If it is lower than 1.8Mpa, it should be adjusted.
(2) The heat transfer effect is not good due to dust accumulation on the condenser. At this time, the condenser of the Temperature Humidity Chamber can be cleaned.
(3) Other refrigeration system failures inside the equipment will also cause overpressure alarms.

Three, water shortage alarm.
The water shortage alarm of the equipment is usually caused by the lack of water in the humidification water tank:
(1) When adding water to the humidification water tank for the first time, the water level is not yet in place.
(2) Where the water supply pipe is blocked, just unblock it;
(3) The water shortage protection temperature controller is set at a lower level, and the normal temperature should be 110°C.

Temperature Humidity Chamber | Thermal Chamber | Climate Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2), IEC60068-2-78, IEC60598-1, GB/T2423.17, GB/T5170.2, GB/T5170.5. The climate chamber is used to test the CFL/LED which meets IES LM-80-08, electricity products, automative cars, home appications and mobiles.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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