Zhongshan, Zhuhai, walk-in constant temperature and humidity test box test equipment manufacturers Cowan specializing in the production walk-in constant temperature and humidity box for many years, has a professional R & D technology, one-stop service and thoughtful, affordable, reliable quality, factory outlets, Cowan is always customer-centric, your support is our motivation. Welcome to the new and old customers to inquire Order: 18,825,596,769 Liu Zhiqiang (sales engineer) for your dedicated service! First, the product uses: Walk-in constant temperature and humidity chamber for the aerospace, electronics, automotive vehicles, LED lighting, LED display, instrumentation, materials, electrical and electronic, chemical paints, building materials, products of various electronic vitality at a high temperature or humid environment, testing of its performance indicators. Especially suitable for the whole or large parts of the low temperature, high temperature, high and low temperature changes, constant heat, high and low temperature humidity test. Humidity Chamber lab studio can change the size and functions according to user requirements; tile-mounted cabinet, elegant; reasonable duct design. Second, the standard: GB10592-89 GB10586-89 technical conditions of high and low temperature heat chamber Technical conditions GB2423.1-2001 GB2423.2-2001 Test A high temperature test methods Test Low Temperature Test Method B test Ca constant GB2423.3-93 Humidity Test Method GB2423.4-93 test Db execution to meet the standards and test methods 1, GB11158 high temperature test chambers 2, GB10589-89 low temperature test chambers 3, GB / T10586-89 damp heat test chambers 4, GB / T2423.1-2001 Test method for low-temperature chamber 5, GB / T2423.2-2001 temperature chamber test methods 6, GB / T2423.3-93 heat chamber test method 7, GB / T2423.4-93 alternating hot and humid Test Method 8, IEC60068-2-1.1990 temperature chamber test methods 9, IEC60068-2-2.1974 temperature chamber Test Method 10, GJB150.3 high temperature test 11, GJB150.4 low temperature test 12, GJB150.9 damp heat test 13, GB /T2423.22 change of temperature tests Third, Zhongshan, Zhuhai, walk-in constant temperature and humidity test box model specifications, technical parameters: 1, Model: KW-RM- volume 2, the internal dimensions: according to customers' requirements 3, the temperature range: - 40 ℃ ~ 90 ℃ 4, Humidity: 30 ~ 98% RH. 5, heating and cooling rate: 1.0 ~ 1.5 ℃ / min 6, the control accuracy: Temperature: ± 1.0 ℃ Humidity: ± 1.5% RH. 7, uniformity: ≤ ± 2 ℃ temperature and humidity: ± 2% RH Fourth, the circuit control system: 1, temperature and humidity control instrument uses self-developed Cowan KW-890 -LCD seven-inch large screen display - programmable microcomputer PID control SSR output operation. Simple screen operation, easy to edit programs. 2. Accuracy: 0.1 ℃ (display range) 3, resolution: ± 0.1 ℃; 4, temperature sensor: PT100 platinum resistance thermometer body; 5, control: heat balance humidity thermostat mode; 6, temperature and humidity control using P. I. D + S.SR system coordination control with channel 7, with automatic calculation of the function, temperature and humidity conditions can be amended immediately so that more precise and stable temperature and humidity control 8, the controller interface options provided in English, Real-time operating graph can display 9, with 120 group programs, each 1200 segments, each cycle can capacity 999 steps, each time setting a maximum of 99 hours 59 minutes 10, input data and test conditions, control has a screen lock feature to avoid human touch and stop 11, with RS-232 or RS-485 remote communication interface is available on the computer design program, to monitor the testing process and perform other functions Switcher 12, the controller has a screen automatically screensavers steam function, in the long run the state better protect the LCD screen (make it longer life) 13. The return air chamber with automatic defrost system (in order to generate the test will not come when the refrigeration evaporator generated on the ice blocking phenomenon) Walk-in temperature and humidity chamber controller KW-890 Ten advantages: a: big screen vivid color screen: TFT LCD (LED backlight) 7 inches TFT color VGA (800x480) II: People machine interactive touch-screen input system, easy to learn, powerful, and in the monitoring process on the curve and understand the procedure set the LCD screen; Third: PV curve / group curve: real representation of temperature and humidity PV, SV graph showing history storage curve, the curve representing the group and the state; Fourth: You can set program 120 group, section 1200, the number of cycles up to 999 times, each time the maximum set 99 hours 59 minutes; V: USB communication interface backup / historical curve / historical data, easy to use; also optional RS485 interface, RS232 communication interface, can easily control and monitoring via PC. Six: a procedural amendment, clear, appointments, start, power, memory, key lock function; seven: screen protector function, you can set the program to run when the operating conditions, a segment times running time (530 hours 59 minutes) each can be set to standby switch, setting maximum 999,999 hours; eight: a variety of alarm, fault occurs at the same time, through the fault display screen, eliminating fault; Nine: recording error history, provides users with access, full screen Available in English, Chinese language; ten: BMP file represents: via USB download history curve BMP image format files. Fifth, walk-in temperature and humidity chamber heating system, using U-speed heating heater. 2, completely independent of the system, does not affect the freezing and control circuit 3, the temperature control output power is via microcomputer calculus, to achieve high precision and high efficiency power efficiency Six, refrigeration system 1, Germany imported compressor system-wide device 2, all The system uses environmentally friendly refrigerant R404A. 3, the whole system as a nitrogen-pressurized pipes are leak tested 24h. 4, heating and cooling system is completely independent. 5, the inner spiral refrigerant copper tubing. 6, water-cooled condenser. 7, the slope of the evaporator. 8, imported electromagnetic valve; filter drier and other frozen components. 9, all refrigeration systems operation program, entirely controlled by the microcomputer controller, up to maximum efficiency and power saving advantages of Zhongshan, Zhuhai, walk-in constant temperature and humidity test box factory service: the supplier is responsible for equipment installation, commissioning and handover . Equipment from the date of transfer, the free year warranty and equipment to implement unscheduled inspection, life-long service and long-term to provide spare parts, such as equipment failure, after the company received the confirmation message, maintenance personnel will be processed within four hours, in time for customers solve problems, after warranty expiration, still getting preferential and extensive technical support and spare parts supply to offer concessions.