Thermal Cycling Test(TC) & Thermal Shock Test(TS)
Thermal Cycling Test(TC):
In the life cycle of the product, it may face various environmental conditions, which makes the product appear in the vulnerable part, resulting in product damage or failure, and then affect the reliability of the product.
A series of high and low temperature cycling tests are done on the temperature change at the temperature variation rate of 5~15 degrees per minute, which is not a real simulation of the actual situation. Its purpose is to apply stress to the test piece, accelerate the aging factor of the test piece, so that the test piece may cause damage to the system equipment and components under environmental factors, in order to determine whether the test piece is correctly designed or manufactured.
Common ones are:
Electrical function of the product
The lubricant deteriorates and loses lubrication
Loss of mechanical strength, resulting in cracks and cracks
The deterioration of the material causes chemical action
Scope of application:
Module/system product environment simulation test
Module/System Product Strife test
PCB/PCBA/ Solder Joint Accelerated Stress Test (ALT/AST)...
Thermal Shock Test(TS):
In the life cycle of the product, it may face various environmental conditions, which makes the product appear in the vulnerable part, resulting in product damage or failure, and then affect the reliability of the product.
High and low temperature shock tests under extremely harsh conditions on rapid temperature changes at a temperature variability of 40 degrees per minute are not truly simulated. Its purpose is to apply severe stress to the test piece to accelerate the aging factor of the test piece, so that the test piece may cause potential damage to the system equipment and components under environmental factors, in order to determine whether the test piece is correctly designed or manufactured.
Common ones are:
Electrical function of the product
The product structure is damaged or the strength is reduced
Tin cracking of components
The deterioration of the material causes chemical action
Seal damage
Machine specifications:
Temperature range: -60 ° C to +150 ° C
Recovery time: < 5 minutes
Inside dimension: 370*350*330mm (D×W×H)
Scope of application:
PCB reliability acceleration test
Accelerated life test of vehicle electric module
LED parts accelerated test...
Effects of temperature changes on products:
The coating layer of components falls off, the potting materials and sealing compounds crack, even the sealing shell cracks, and the filling materials leak, which causes the electrical performance of components to decline.
Products composed of different materials, when the temperature changes, the product is not evenly heated, resulting in product deformation, sealing products cracking, glass or glassware and optics broken;
The large temperature difference makes the surface of the product condense or frost at low temperature, evaporates or melts at high temperature, and the result of such repeated action leads to and accelerates the corrosion of the product.
Environmental effects of temperature change:
Broken glass and optical equipment.
The movable part is stuck or loose.
Structure creates separation.
Electrical changes.
Electrical or mechanical failure due to rapid condensation or freezing.
Fracture in a granular or striated manner.
Different shrinkage or expansion characteristics of different materials.
The component is deformed or broken.
Cracks in surface coatings.
Air leak in the containment compartment.
Lab Companion-Rapid Temperature Cycling Test Chamber
Introduction of Lab Companion
With over 20 years of experience, Lab Companion is a world class manufacturer of environmental chambers and an accomplished supplier of turn-key test systems and equipment. All our chambers build on Lab Companion’s reputation for long life and exceptional reliability.
With a scope of design, manufacture and service, Lab Companion has established a quality management system that complies with the International Quality System Standard ISO 9001:2008. Lab Companion’s equipment calibration program is accredited to the International Standard ISO 17025 and the American National Standard ANSI/NCSL-Z-540-1 by A2LA. A2LA is a full member and signatory of the International Laboratory Accreditation Cooperation (ILAC), the Asia Pacific Laboratory Accreditation (APLAC) and the European Cooperation for Accreditation (EA).
Lab Companion’s SE-Series Environmental Test Chambers offer a significantly enhanced airflow system, which provides better gradients and improved product temperature change rates. These chambers utilize Thermotron’s flagship 8800 Programmer/Controller featuring a high resolution 12.1” flat panel display with touch screen user interface, expanded capabilities to graph, data log, edit, access on-screen help, and long term hard drive data storage.
Not only do we offer the highest quality products, we also provide ongoing support designed to keep you up and running long after the initial sale. We provide factory direct local service with an extensive inventory of the parts you might need.
Performance
Temperature range: -70°C to +180°C
Performance: With 23 Kg aluminum load (IEC60068-3-5), the rising rate from +85°C to -40°C is 15℃/min; the cooling rate from -40°C to +85°C is15℃/min too.
Temperature control：± 1°C Dry bulb temperatures from control point after stabilization at the control sensor
Performance is based on an ambient condition of 75°F (23.9°C) and 50% RH
Cooling/Heating Performance based on measurement at the control sensor in the supply air stream
Constructure
Interior
Nonmagnetic Series 300 stainless steel with a high nickel content
Internal seams heliarc welded for hermetic sealing of the liner
Corners and seams designed to allow for expansion and contraction under the temperature extremes encountered
Condensate drain located in the liner floor and under the conditioning plenum
Chamber base is fully welded
“Ultra-Lite” non-settling fiberglass insulation
One adjustable interior stainless steel shelf is standard
Exterior
Die-formed treated sheet steel
Metal access covers provided for easy opening doors to electrical components
Finish water-based, air dry lacquer, sprayed over a cleaned and primed surface
Easy lift-off hinged access doors for servicing the refrigeration system
One 12.5 cm diameter access port with interior weld and removable insulating plug mounted in right hand side wall accessories on hinged door for easy access
Features
Chamber Operation clearly displays helpful run-time information
Graphing Screen offers expanded capabilities, enhanced programming and reporting
System Status displays crucial refrigeration system parameters
Program Entry makes it easy to load, view and edit profiles
Set Up quick-step wizards make profile entry easy
Pop-up Refrigeration Charts for handy reference
Therm-Alarm® provides over & under temperature alarm protection
Activity Log Screen provides comprehensive equipment history
Web Server allows internet access to equipment via Ethernet
User-Friendly Pop-up Key Pad makes data entry quick and easy
Includes:
- Four USB Ports-two External & two Internal
- Ethernet
- RS-232
Technical specifications
1-4 independently programmable channels
Measuring Accuracy: 0.25% of span typical
Selectable °C or °F temperature scale
12.1” (30 cm) color flat panel touch screen display
Resolution: 0.1°C, 0.1%RH, 0.01 for other linear applications
Real time clock included
Sample Rate: Process variable sampled every 0.1 seconds
Proportional Band: Programmable 1.0° to 300°
Control Method: Digital
Intervals: Unlimited
Interval Resolution: 1 sec to 99 hrs,59 min with 1 second resolution
- RS-232
- 10+ Years Data Storage
- Product Temperature Control
- Event Relay Board
Operating Modes: Automatic or Manual
Program Storage: Unlimited
Program Loops:
- Up to 64 loops per program
Loops can be repeated up to 9,999 times program
- Up to 64 nested loops are allowed per
The Relationship Between the Altitude of the Standard Atmosphere and Air Temperature and Pressure
The standard atmosphere referred to here refers to the "1964, ICAO Standard atmosphere" adopted by the International Civil Aviation Organization. Below an altitude of 32 km, it is the same as "1976, U.S. standard atmosphere". Changes in air temperature near the surface (below 32 km) are:
Ground: The air temperature is 15.0℃, the air pressure P=1013.25mb= 0.101325MPa
Temperature change rate from ground to elevation 11 km: -6.5 ℃/ km
On the 11km interface:
The air temperature is -56.5 ℃ and the air pressure P=226.32mb
Temperature change rate at elevations of 11-20 km: 0.0℃/ km
Temperature change rate at altitude 20-32 km: +1.0/ km
The following table lists the temperature and pressure values of the standard atmosphere at different altitudes. In the table, "gpm" is the altitude meter, and its negative sign represents the altitude
Gpm
Temperature℃
Atmospheric pressure(mb)
Gpm
Temperature℃
Atmospheric pressure(mb)
Gpm
Temperature℃
Atmospheric pressure(mb)
-400
17.6
1062.2
4800
-16.2
554.8
10000
-50.0
264.4
-200
16.3
1037.5
5000
-17.5
540.2
10200
-51.3
256.4
0
15.0
1013.3
5200
-18.8
525.9
10400
-52.6
248.6
200
13.7
989.5
5400
-20.1
511.9
10600
-53.9
241.0
400
12.4
966.1
5600
-21.4
498.3
10800
-55.2
233.6
600
11.1
943.2
5800
-22.7
484.9
11000
-56.5
226.3
800
9.8
920.8
6000
-24.0
471.8
11500
-56.5
209.2
1000
8.5
898.7
6200
-25.3
459.0
12000
-56.5
193.3
1200
7.2
877.2
6400
-26.6
446.5
12500
-56.5
178.7
1400
5.9
856.0
6600
-27.9
434.3
13000
-56.5
165.1
1600
4.6
835.2
6800
-29.2
422.3
13500
-56.5
152.6
1800
3.3
814.9
7000
-30.5
410.6
14000
-56.5
141.0
2000
2.0
795.0
7200
-31.8
399.2
14500
-56.5
130.3
2200
0.7
775.4
7400
-33.1
388.0
15000
-56.5
120.5
2400
-0.6
756.3
7600
-34.4
377.1
15500
-56.5
111.3
2600
-1.9
737.5
7800
-35.7
366.4
16000
-56.5
102.9
2800
-3.2
719.1
8000
-37.0
356.0
17000
-56.5
87.9
3000
-4.5
701.1
8200
-38.3
345.8
18000
-56.5
75.0
3200
-5.8
683.4
8400
-39.6
335.9
19000
-56.5
64.1
3400
-7.1
666.2
8600
-40.9
326.2
20000
-56.5
54.7
3600
-8.4
649.2
8800
-42.2
316.7
22000
-54.5
40.0
3800
-9.7
632.6
9000
-43.5
307.4
24000
-52.5
29.3
4000
-11.0
616.4
9200
-44.8
298.4
26000
-50.5
21.5
4200
-12.3
600.5
9400
-46.1
289.6
28000
-48.5
15.9
4400
-13.6
584.9
9600
-47.4
281.0
30000
-46.5
11.7
4600
-14.9
569.7
9800
-48.7
272.6
32000
-44.5
8.7
Unit conversion relation
1mbar=100Pa=0.1KPa=0.0001 Mpa
1ft=0.3048m=304.8mm
55000ft*0.3048=16764m
Lab Companion focused on the production of reliability environmental test equipment for 19 years, successfully helped 18,000 enterprises to test the reliability and environmental performance of products and materials.
The main products are: high temperature test chamber, high and low temperature and humidity test chamber, walk-in environmental test chamber, rapid temperature cycling test chamber, thermal shock test chamber, high and low temperature low pressure test chamber, vibration of the comprehensive chamber and other test equipment manufacturing solutions to help enterprises R & D bigger and stronger!
If you need to know more about the products of the environmental test chamber, you can search the official website of "Lab Companion", feel free to contact us for consultation, we can provide you with one-on-one professional technical advice and guidance.
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