Programmable constant temperature and humidity testing machine, environmental reliability testing equipment, simulating high and low temperature humidity and heat

Description :

  The constant temperature and humidity test chamber is the core equipment used for environmental reliability testing, mainly solving the performance verification problem of products under complex climatic conditions. It accurately simulates various temperature and humidity environments in a closed chamber through the collaborative work of four major systems: heating, cooling, humidification, and dehumidification. This device is widely used for quality testing of electronic, electrical, communication, instrument, vehicle, plastic products, metal, food, chemical, building materials, medical, aerospace and other products, aiming to evaluate the weather resistance and service life of products and ensure their stability in extreme environments.

  The execution standards of the constant temperature and humidity test chamber cover mainstream testing specifications at home and abroad, such as GB/T 2423, IEC 60068, MIL-STD-810, etc. The typical temperature range is usually -70 ° C to+150 ° C. We can achieve -120 ° C to+200 ° C, and the humidity range is controlled between 20% RH and 98% RH, depending on the model. The box body is mostly made of SUS304 stainless steel liner and cold rolled steel plate plastic sprayed shell, and the insulation layer is made of high-density polyurethane foam or glass fiber to ensure good thermal insulation performance. The control system is usually equipped with a programmable LCD touch screen that supports multiple program settings. The temperature fluctuation is generally controlled within ± 0.5 ℃, and the uniformity can reach ± 2.0 ℃.

  When selecting a constant temperature and humidity test chamber, it is necessary to clarify the size, weight, and heat generation of the test sample to determine the appropriate inner chamber volume and cooling power. For scenarios that require rapid temperature change testing, models with linear heating and cooling capabilities should be selected; If only static constant testing is conducted, ordinary nonlinear devices can meet the requirements. Attention should be paid to distinguishing between "constant temperature and humidity" and "high and low temperature test chambers", the latter of which does not have humidity control function. In addition, it is necessary to consider the installation space of the equipment, power requirements (usually three-phase five wire AC380V), and cooling methods (air-cooled or water-cooled) to match the on-site working conditions.

  The installation of the constant temperature and humidity test chamber should be kept level, and sufficient space for heat dissipation and maintenance should be reserved, especially for air-cooled models, which should ensure good ventilation. In daily use, the water tank and humidification pipeline should be regularly cleaned to prevent scale blockage from affecting humidity accuracy; The condenser requires monthly dust removal to maintain refrigeration efficiency. When not in use for a long time, the box should be dried and the power should be disconnected. Common faults include humidity display deviation, decreased cooling effect, etc., which can usually be preliminarily judged by calibrating sensors or checking refrigerant pressure. It is recommended to have professional personnel perform regular maintenance to extend the service life of the equipment.

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