The standards for the walk-in temperature and humidity test chamber are: GB/T 5170.2-2008, GB/T 5170.5-2008, GB/T 11158-2008, GB/T 10589-2008, GB/T 10586-2006, GB/T 2423.1 -2008, IEC 60068-2-1:2007, GB/T 2423.2-2008, IEC 60068-2-2:2007, GB/T 2423.3-2006, IEC 60068-2-78:2001, GB/T 2423.4-2008 , IEC 60068-2-30:2005, GB/T 2424.5-2006, IEC 60068-3-5:2001, GB/T 2424.6-2006, IEC 60068-3-6:2001, GJB 150.3-1986, GJB 150.4- 1986, GJB 150.9-1986 and other experimental standards.
1 Introduction to performance indicators:
1: Test environment conditions: the environment temperature is +25℃, the relative humidity is ≤85%, and there is no sample in the test box.
2: Temperature range: -45℃～105℃.
3: Heating rate: ≤3℃/min (within -40℃～150℃, no load).
4: ≤1℃/min (within 150℃～-40℃, no load).
Note: Non-linear cooling, average throughout the process.
5: Humidity range: 20～98%RH (no heat source load).
Note: Test environment conditions: ambient temperature 5～30℃, relative humidity≤85%RH, circulating cooling water temperature≤30℃, circulating cooling water supply pressure 0.25～0.4MPa, no sample in the test box (unless otherwise specified) .
2 Introduction of refrigeration system:
1: Working mode: mechanical compression binary cascade refrigeration mode.
2: Refrigeration compressor: imported piston compressor.
3: Evaporator: finned tube heat exchanger.
4: Condenser: coil type water circulation condenser.
5: Throttle device: thermal expansion valve, capillary tube.
6: Refrigerator control mode: The PLC (programmable logic controller) of the control system automatically adjusts the operating conditions of the refrigerator according to the test conditions.
7: Refrigerant: R404a R23 (ozone depletion index is 0).
3 Introduction of electrical control system:
1: Controller model: South Korea three yuan 1500.
2: Temperature measurement: T-type thermocouple.
3: Display: 7.0 inches 640X480 dot matrix, TFT color LCD display.
4: Operation mode: software programming control.
5: Setting method: touch screen setting.
6: Setting range; Upper limit of preheating temperature in high temperature room: +100℃. Lower limit of precooling temperature in low temperature room: -42℃.
Test room (sample area): upper limit of temperature shock +10℃; lower limit of temperature shock -10℃.
7: Program capacity: 20 programs. Each program has a maximum of 3 steps; each program can be used for 9999 times.
8: Input: thermocouple.
9: Communication function (optional): RS-485 interface, with local and remote communication functions (centralized monitoring software, RS-485/RS-232 converter required, one COM port and one USB port of the PC are required) ; Up to 16 devices can be connected at the same time, and the cumulative cable length is up to 800m.
10: Control mode: Anti-integral saturation PID, fuzzy algorithm.
BTC balance temperature control mode.
11: Curve record function: RAM with battery protection can save the set value, sampling value and sampling time of the device; the maximum storage time is 60 days (when the sampling period is 1.5min).
12: IBM PC compatible machine, CPU above PⅡ, memory above 128M, Simplified Chinese Windows2000 or Simplified Chinese WindowsXP operating system.
13: Equipment self-diagnosis function: fault alarm and reason, processing prompt function, fault record, over-temperature protection, upper and lower temperature protection, power failure protection, sensor up and down wind selection, test pause, alarm output, time signal output, test end output , Temperature reached output, timing start and automatic stop function.
4 Introduction to the structural characteristics of the walk-in temperature and humidity test chamber:
1: High-precision programmable temperature and humidity controller (imported from Korea Sanyuan Samwontech1500) Display and setting mode: 7.0-inch color LCD touch display, screen dialogue setting, Chinese and English switching.
Control method: BTHC (balanced temperature and humidity control system), SSR (solid state relay) is controlled by PID (microprocessor)
PID automatic calculation and abnormal self-diagnosis function, which can correct temperature and humidity changes in time
Temperature measurement: T-type armored thermocouple; humidity measurement: dry and wet bulb thermometer method
Temperature setting range: Adjust the upper limit of 5℃ and the lower limit of -5℃ according to the equipment's temperature working range; humidity setting range: 0～100%RH
Temperature setting and indication accuracy: 0.1℃, humidity setting and indication accuracy 0.1%RH
Programmable: 120 groups of programs, each group of 1200 segments, each segment cycle 999 times, each segment time set the maximum value of 999 hours and 59 minutes
You can directly touch to set the test temperature, humidity, time, cycle number, test mode, etc.
Color real-time display of temperature, time, curve and other screens can save the actual measured temperature, humidity, set temperature, humidity and sampling time, etc.
With its own communication interface, you can set the program on the computer, monitor the test process, and print data and curve reports, etc.
2: Mechanical room: including refrigeration unit, drainage device, fan, power distribution control cabinet, water filter device, water storage tank
Power distribution control cabinet: cooling fan, buzzer, power distribution board, RS-232 physical interface, total power leakage circuit breaker.
3: Test chamber door: hinged double door, door opening height 1800mm, door width 1500mm equipped with safety door locking mechanism, power distribution on the door, anti-condensation hollow glass observation windows, visual range of about L360×W450mm door frame for anti-condensation electric heating Device.
4: Standard configuration of the test box: lead hole: diameter Ø50mm2 (1 rubber plug for each).
Lighting lamp: moisture-proof lamp, 60W/AC220V.
5: Control panel: temperature (humidity) control display, over-temperature protection setting device, humidification water drainage switch, emergency stop switch, operation indicator, fault indicator, buzzer, lighting switch, USB interface control panel The installation position varies with the installation position of the door.
6: Power distribution control cabinet: total power leakage circuit breaker, controller, switchboard, cooling fan, high and low temperature circulating fan motor.
7: Heater: Nickel-chromium alloy electric heating wire heater. Heater control mode: non-contact and other periodic pulse width adjustment, SSR (solid state relay).
8: Air conditioning channel: Air conditioning channel: fan, heater, evaporator, dehumidifier, drainage device, dry-burning preventer, wet bulb temperature sensor, wet bulb water tank.
9: Thermal insulation enclosure structure: Thermal insulation enclosure structure: high-grade paint steel plate 2.0mm shell, temperature-resistant polyurethane foam filling insulation and SUS304 stainless steel plate inner tank composite assembly (total thickness 100mm)
10: Power cord hole and drain hole: located under the back of the box.
11: Box size inside the box: W2000xH2000xD1500mm
12: Outer box size: W3000xH2600xD2500mm
13: 3000kg