Features: 1, large walk-in constant temperature and humidity test chamber has a very wide range of temperature and humidity control, to meet the various needs of users. Unique balance humidity thermostat mode, access to safe, precise temperature and humidity environment. A stable, balanced heating, humidification performance, high accuracy, high stability temperature and humidity control. 2, large walk-in constant temperature and humidity test chamber equipped with high-precision intelligent temperature controller, temperature and humidity with touch screen display. Optional temperature and humidity recorder 3, large walk-in constant temperature and humidity test chamber refrigeration circuit automatic selection, controlled device with automatic selection with the set value of the temperature of the refrigerant circuit operation performance, to achieve a high temperature state started directly refrigerator, direct cooling . 4, large walk-in constant temperature and humidity test chamber door with large viewing window for easy observation of the test sample of test status. 5, large walk-in constant temperature and humidity test chamber is equipped with advanced security, protection devices - leakage circuit breakers, over-temperature protection, lack of protection, water protection. Meet the criteria: 1.GB11158 high temperature test chambers 2.GB10589-89 temperature chamber Technical conditions Technical conditions 4.GB/T2423.1-2001 3.GB/T10586-89 heat chamber temperature chamber test methods 5.GB /T2423.2-2001 high temperature chamber test methods 6.GB/T2423.3-93 heat chamber test methods 7.GB/T2423.4-93 humidity test methods 8.IEC60068-2-1.1990 low temperature test chamber Methods 9.IEC60068-2-2.1974 high temperature chamber test methods 10.GJB150.3 11.GJB150.4 low temperature test test test 13.GB/T2423.22 12.GJB150.9 heat temperature testing applications industry: For national defense Heat the industry, aerospace industry, automation components automotive parts, electrical and electronic parts, plastic, chemical, pharmaceutical industry and universities, research institutes and other related products in various fields, cold testing, technical parameters: Model ZL- volume (low selection : A ~ C) Size (cm) space according to customer specified size and the design temperature range -45 ℃ ~ + 80 ℃ (A: 0 ℃ B: -20 ℃ C: -40 ℃) Humidity 20% ~ 95% RH (corresponding to 20% of the humidity temperature range with reference to the attached graph song page) temperature analysis accuracy / uniformity of ± 0.1 ℃; ± 0.1% RH / ± 1.5 ℃; ± 5.0% RH accuracy of temperature control / fluctuation of ± 1.0 ℃; ± 2.0% RH / ± 0.5 ℃; ± 3.0% RH Heating time average temperature 1.5 degrees per minute, wireless requirements (no load condition) the cooling time of about 0.7 ℃ ~ 1.0 ℃ / min, wireless requirements (no load condition ) internal and external material outside the box is color steel paint or matte stainless steel handle, stainless steel insulation material inside the box for the protection of water-cooled high-temperature compressor / two-stage high-density amino acid B vinegar foam insulation material cooling system has no fuse switch compressor overload protection switch, refrigerant high and low pressure protection switch, over-temperature protection over humidity switches, fuses, failure warning system Accessories Recorder (optional), view window, 50mm testing hole, PL box lights, partitions, wet and dry gauze ball Controller Korea "TEMI" or Japanese "OYO" brand compressor optionally French "Taikang" brand France's "Tecumseh" Brand Power 1Φ 220VAC ± 10% 50 / 60Hz & 3Φ 380VAC ± 10% 50 / 60Hz