Climate chambers IEC 60068-2-1 cold test
Ultra-low temperature climate test chamber is widely used in aviation, automobile, military industry, solar PV field. A powerful ultra-low temperature climate chamber not only brings strong shock to users in appearance, and the performance is beyond imagination.
Lenpure equipment can meet a variety of test standards, in line with CE security certification, Today, I will combine the test standard IEC 60068 - 2 - 1 to show you the power of the Lenpure ultra-low temperature climate test chambers.
The temperature control adopts high definition seven inch touch controller UMC brand from Japan, which has the functions of touch setting, digital and direct display, and temperature control output power is calculated by P.I.D microcomputer.
The refrigerator adopts the original French Tecumesh fully enclosed compressor. And the drying filter, coolant flow window, repair valve, oil separator, solenoid valve, liquid storage cylinder are all imported original parts
The freezing system is designed by unit or binary low temperature loop system. Refrigerants use the famous brand of DuPont in the United States.
The ultra-low temperature test chamber adopts the blower for strong air supply cycle to avoid any dead angle, which can make the temperature distribution in the test area uniform.
The design of wind circulation and return wind, wind pressure and wind speed are in accordance with the test standard, and the temperature can be stabilized quickly at the moment of opening the door.
Heating, cooling and completely independent system can improve efficiency, reduce test cost, increase life and reduce failure rate.
There are so many safety protection in Lenpure climate test chambers. Such as the
over-temperature of the whole equipment; in-phase/ reverse phase of the whole equipment; overload of the whole equipment; over-pressure of the refrigeration unit; the timing of the whole equipment;
Other protections such as electric leakage, operation indication, automatic stop after fault alarm, etc.
In order to ensure the requirement of the test chamber to the cooling rate and the minimum temperature, the refrigeration system of the climate test chamber adopts a cascade refrigeration system consisting of an inlet compressor, and the refrigeration system has the advantages of reasonable matching, high reliability, convenient use and maintenance and the like.
Having learned so much about the appearance, structure and powerful performance of the lenpure climate test chamber, the following is to take you to the test operation. The flow and method of this experiment are in full compliance with the IEC 60068 -2-1 test standard.
Test scope: the low temperature test specified in this part is suitable for heat dissipation and non-heat dissipation test samples.
Purpose: this experiment is limited to determining the ability of components, equipment, and other products to be transported and stored at low temperatures. It can not be used to test the resistance of test samples to temperature change and the operation ability under temperature change environment.
For the test sample which can not achieve temperature stability, the duration is calculated from the electrification of the sample.
The ab test, Low temperature test of temperature gradient, non-heat dissipation test sample. (the test sample is generally not electrified, and if it is electrified, it needs to be electrified after the temperature is stable.)
Purpose: this test method is used to carry out the low temperature test of non-heat dissipation samples. The test samples have been placed at low temperature for long enough to reach stable temperature.
Summary of the test: put the test sample into the test chamber at the temperature of the laboratory, and then adjust the temperature to the harsh grade temperature in accordance with the relevant regulations. When the test sample is stable, it is exposed to the specified duration under this condition.
For the test samples which need to be electrified, the test samples should be electrified after the temperature of the test samples is stable, and the functional tests should be carried out according to the needs. In this case, it may take some time to achieve temperature stability, and then the test sample will be exposed to the duration specified in the relevant specifications at such low temperature.
The test samples are usually tested in a non-working state, and the experiment usually adopts a high airflow velocity cycle. The following picture is about how to put the samples.
The ad test, heat dissipation sample temperature gradient low-temperature test, the test sample after the temperature begins to stabilize the power on.
Purpose: this experimental method is used to carry out the low temperature test of heat dissipation sample. The test sample was placed at low temperature for long enough to reach the temperature stability.
Summary of the test: put the test sample into the laboratory temperature test chamber, and then adjust the temperature to the harsh grade temperature in accordance with the relevant regulations.
Power or load the test sample and check the function of the test sample to determine whether it meets the requirements of the specification. The test sample shall be in operation in accordance with the working cycle and load conditions specified in the specification.
When the test sample is stable, the specified duration is exposed under this condition.
In this experiment, the low airflow velocity is usually used.
The ae test , Low temperature test of temperature gradient,
Heat radiation sample, and the test sample shall be energized throughout the test
Purpose: this experimental method is used to carry out the low temperature test of heat dissipation sample. The test sample is placed at low temperature for a long time, and the temperature is stable, and the test sample is required to be electrified throughout the test process.
Summary of the test: put the test sample into the chamber at which the temperature is the laboratory temperature. Power the test sample and test the function of the sample according to the need.
Then set the temperature to the harsh grade temperature that conforms to the relevant regulations. When the test sample is stable, the specified duration is exposed under this condition.
In this experiment, the low airflow velocity cycle is usually used.
The test sample shall be in operation in accordance with the working cycle and load conditions specified in the specification.
For the test sample which can not achieve temperature stability, the duration is calculated from the electrification of the sample.
Finally, the detection: visual detection and related requirements of performance testing.
After the test, please pay attention to cleaning work of the climate test chambers in order to prolong the service life. In general, it is best to fix the cleaning condenser every 3 months for the compressor cooled by air cooling.
The condenser should be repaired regularly and decontamination and dust removal should be carried out to ensure its good ventilation and heat transfer performance.
For the compressor with water-cooled cooling, in addition to ensuring its pressure and temperature, the corresponding flow rate must be guaranteed. The condenser is cleaned and descaled regularly to obtain its continuous heat transfer performance. Regular cleaning evaporator.
Due to the different cleanliness grade of the test product, a lot of dust will be condensed on the evaporator under the action of forced wind circulation. Small particle objects such as dust should be cleaned regularly.
For more details, please feel free to contact sales@lenpure.com
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