ATEC

Solution

02

2021

-

06

25 ℃ linear high and low temperature rapid temperature change (damp heat) test chamber

Author:


Operating external environmental conditions:
Outside temperature: 0°C ~ 40°C
Relative humidity: £ 90% RH
External pressure: standard atmospheric pressure
Power supply: 380V ± 10%,50Hz + N + G
Cooling water temperature: ≤ +32°C
Grounding resistance: ≤ 4W
Cooling water pressure: 0.2-0.5MPa
Water flow: 22T/hour, interface G2 ″
Compressed air: 0.4-0.7MPa
Flow rate: 50L/min,
Interface: ø8
Main indicators of temperature
► Temperature range:-70°C/ 150°C
► Temperature deviation (in no-load steady state):≤ ± 2°C
► Temperature uniformity (at no-load steady state):≤ 2°C
► Temperature fluctuation (in steady state):≤ ± 0.5°C
► Temperature change rate (with 20kg load for aluminum block or with LCM sample):
Heating rate:(-40°C to 85°C) 5- 25°C/min (electric heating, linear average)
Cooling rate:( 85°C to -40°C) 5-25°C/min (mechanical refrigeration, linear average)
► Linear deviation: maximum ± 4.0 ℃ (deviation of temperature change rate)
Meet the GBT 5170.2-2008 environmental test equipment inspection method-temperature test equipment and GBT 5170.1-2008 electrical and electronic products environmental test equipment inspection method general
2. Linear deviation: 5 /-2 ℃/min,10 /-3 ℃/min,15 /-3 ℃/min, 20 /-4 ℃/min, 25 /-4 ℃/min
Heating time:-70 ℃ ~ +150 ℃ (80 *% in the whole process -7min of nonlinearity) When used as a common constant temperature and humidity box, the heating rate is 0~25 ℃/min
Cooling time: +150 ℃/RT ~-70 ℃ (80 *% temperature range in the whole process-nonlinearity is 7min) when used as a common constant temperature and humidity box, the cooling rate is 0~25 ℃/min
► Meet the following tests
1 2
► Temperature overshoot: ≤ 4°C
Temperature stabilization time (the temperature reaches the set value and starts to calculate until it stabilizes within the set value ± 2°C):≤ 3min
Humidity range: 20% to 98% R.H.
► Humidity operating range: 20°C/ 85°C
► Humidity fluctuation (in steady state):≤ ± 2°C
► Humidity deviation (in steady state):± 3% RH
► The temperature and humidity detection system samples in seconds
It can meet the requirement that condensation is not allowed in the whole operation process.
► Temperature recovery time:<3min
► Test method:
1. The rate of temperature change shall be in accordance with IEC 60068-3-5.
2. The reference sensor is placed at the center point when it is unloaded, and at the air outlet when it is fully loaded.
3. The internal load during functional verification is: 20kg stability calibration point distribution map: 9 points according to JJF 1101-2003
Refrigeration system
► Refrigeration: Mechanical cooling is provided by a cascade system. It is realized by advanced two semi-sealed exchange type compressors. The body consists of a special cast iron, an easy-to-integrate cylinder and a piston of light metal alloy. water-cooled condenser
Compressor power: 2 × 44HP Germany BITZER semi-closed unit
► Cooling method: water cooling
► Refrigerant: Use environmentally friendly refrigerant R404A (excluding CFC), which is not prohibited by the Montreal Convention or the London Amendment and the new US EPA law.
Refrigeration patented technology: the ability to achieve intelligent adjustment of the cooling capacity, can be automatically adjusted with the temperature state, so as to quickly achieve temperature changes and temperature balance. Compared with the control temperature of ordinary cold and heat balance, the response speed is faster, the power consumption is lower, the temperature deviation and fluctuation in the box are smaller, and the temperature overshoot is effectively avoided. (See patent certificate for details)
Main features of box structure
► Heating system: high-efficiency nickel-chromium alloy electronic heater, completed by dual adjustable fault protection thermostat.
► Heating method: The heating wire is used to generate heat, and the hot air reaches the inside of the box evenly through the air duct. The air duct design has obtained the national patent, and the temperature state is adjusted intelligently through the software, so as to quickly realize the temperature change.
► Interior lighting: 1 x 35 W lamp with protective cover and control switch on the control panel outside the cabinet.
Bottom plate bearing: can be evenly bearing 100kg/㎡.
► Observation window: The single-wing door of the cabinet has a multi-glazed observation window with internal heating to prevent condensation and frost formation. The dimensions are mm 450 x 450.
► Door: Full opening single wing type with double silicone rubber seal and door lock.
Refrigeration system
► Refrigeration: Mechanical cooling is provided by a cascade system. It is realized by advanced two semi-sealed exchange type compressors. The body consists of a special cast iron, an easy-to-integrate cylinder and a piston of light metal alloy. water-cooled condenser
Compressor power: 2 × 44HP Germany BITZER semi-closed unit
► Cooling method: water cooling
► Refrigerant: Use environmentally friendly refrigerant R404A (excluding CFC), which is not prohibited by the Montreal Convention or the London Amendment and the new US EPA law.
Refrigeration patented technology: the ability to achieve intelligent adjustment of the cooling capacity, can be automatically adjusted with the temperature state, so as to quickly achieve temperature changes and temperature balance. Compared with the control temperature of ordinary cold and heat balance, the response speed is faster, the power consumption is lower, the temperature deviation and fluctuation in the box are smaller, and the temperature overshoot is effectively avoided. (See patent certificate for details)

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