IEC 60068-2-14 Three-Box Thermal Shock Test Chamber
Application:
It is used to test the tolerance of material structures or composite materials in continuous environments of instantaneous extreme high and low temperatures, so as to test the chemical changes or physical damage caused by thermal expansion and contraction of materials in the shortest time. It is suitable for tests of physical changes in electronics, vehicles, metals, chemicals, building materials, communication components, national defense industry, aerospace industry, electronic chips IC, IT, etc.
Volume and size:
| Volume | 100L |
| Inner box size | W(500) × H(500) × D(400)mm |
| Outer box | W(1500) × H(2000) × D(1800)mm |
Equipment performance:
| Test environment conditions | Environment temperature +5～+28℃, relative humidity≤85%, under the condition of no sample in the chamber |
| Test standards | GB/T 2423.1-2001, GB/T 2423.2-2001, GB/T 2423.22-2001, GJB 150.3-2001, etc. |
| Test room temperature range | 1. High temperature：+60℃~ +150℃
2. Low temperature：-10℃~-55℃ |
| High low
temperature conversion time |
≤10S |
| High low
temperature recovery time |
3~5min（nonlinear and no-load） |
| Temperature control precision | ±0.5℃ |
| Temperature fluctuation | ≤0.5℃ |
| Temperature uniformity | ±2.0℃ |
| Heating rate of preheating zone | ≥3℃/min（nolinear） |
| Cooling rate of pre-cooling zone | ≥2℃/min（nolinear） |
| Working noise | A sound level≤70dB(A) (In the environmental temperature 25 ℃, the less echo inside the soundproof room; the average value of 8 points tested by A,; each test point away from the noise source 1 meter, height from the ground 1 meter) |
Structural features:
| Thermal insulation structure | 1.Outer material: high quality heat cold resistant stainless steel plate(or color steel electrostatic spraying)
2.Inner material: high quality heat cold resistant stainless steel plate 3.Chamber box thermal insulation material: rigid polyurethane foam + glass fiber |
| Air conditioning channel | 1. Adopt more wing centrifugal circulation fan, strengthen axis with high and low temperature resistance of rotating blades made of aluminum alloy, in order to reach forced convection.
2. FLOW THROW air supply way: horizontal diffusion vertical heat exchange arc cycle. 3. Program automatic control high speed cylinder driving and the high and low temperature air supply gate switching. |
| Test chamber standard configuration | 1.Mobile casters: 4
2. Fixed foot cup: 4 (height adjustable) 3. Specimen holder：2 layers of stainless steel specimen holder, bearing (uniform distribution) : 20 kg/layer (sample in the chamber box accumulative total load no more than: 60 kg) 7. Upper computer communication software CD, U disk interface 8. Pin hole(located in the left of the box): oneφ50mm (optional) |
| Door | Single hinge door open (facing enclosure, hinges on the left, right hand) |
| Control panel | Controller display screen, U disk interface, power switch |
| Mechanical room | Refrigeration units, water pans, drain hole
Condenser, plate heat exchanger, wind motor Refrigeration system safety protection device (see the configuration list) |
| Power distribution control cabinet | IO plate, machine tool transformer, ballast, intermediate relay, time relay, solid state relay, ac contactor, thermal relay, fuse, owe anti-phase relay, air switch |
| Heater | 1. Nickel-chromium alloy heating wire type heater
2. Heater control way: non-contact cycle pulse width modulation, SSR (solid state relay) 3. Heater power：10KW |
| Power cord and drain hole | Located on the back of the chamber |
Safety protection device:
| Refrigeration protection | 1. Compressor overheat protection
2. Compressor overcurrent protection 3. Compressor high and low pressure protection 4. Compressor oil pressure protection (large semi-enclosed compressor optional) 5. Overtemperature protection of liquid supply temperature 6. Ultra-high pressure relief protection |
| Test chamber | 1. Adjustable overtemperature protection
2. Air conditioning channel limit overtemperature protection 3. Fan motor overheating protection |
| Other | 1. Emergency shutdown protection
2. Total power supply phase sequence and phase loss protection 3. Overload and short circuit protection 4. The box repeatedly opens the door causing the refrigeration system fault alarm protection 5. Air compressor supply insufficient alarm protection |
