If the product to be tested meets the above two dustproof levels, the product is a qualified product and can continue to be developed, produced and launched into the market. The difference between IP6X and IP5X of the sand and dust test chamber, as mentioned above, one allows a small amount of dust to enter, but can not affect the use; one is not allowed to have dust enter. And these two dustproof grades are already at present, and the dustproof grade index in the IP shell protection standard is relatively high.
Why do sand and dust tests ? IP5X/ IP6X sand dust resistance test equipment is mainly used for low-voltage electrical appliances, motors, instruments, meters, electronic products, lamps and lanterns of sand and dust simulation detection, is to evaluate the sealing of mobile phones, electrical products and other products in the sand and dust environment, automobiles, motorcycle parts, seals and other use, storage, transportation in the sealing performance. It is a testing instrument for testing the sealing performance of commodity casings.
In general, The dust detection of IP 5Xand IP 6Xis different. The experimental standard of IP 5Xis: the test piece is placed in the middle of the metal screen of the sand and dust test box, and the dust raising time and stoppage time are set on the automatic control system. Dust time, the experiment time is at least 2 hours.
The experimental conditions of IP 6Xare as follows: the test piece is placed in the middle of the stainless steel wire mesh of the sand and dust test box, the vacuum port of the sand and dust test box is connected to the air outlet of the test piece, the pressure in the test piece casing is maintained less than atmospheric pressure, and the When the vacuum speed is 40 times to 60 times the volume of the casing per hour, the experiment will be carried out for 2 hours. If the vacuum pumping speed is lower than 40 times the volume of the casing per hour, the experiment can be stopped when the volume is continuously pumped to 80 times or 8 hours.
When using the sand and dust environmental test chamber, It should be noted that the talc powder used is in line with the regulations of human health and safety. The amount of talc powder is 2 kg per cubic test box volume, and the number of uses should not exceed 20 times. By using talcum powder, a small particle of dust, under the action of the oscillator, it is combined with air blast to form a sand-like shape, and enters the bottom of the pipe through the conduit.
The bottom of the pipe adopts wind blowing or other particle suspension methods to uniformize the dust and air Mixing, blowing to the upper duct under the action of the overall blowing system, and then freely sinking into the test area above the glass window, testing the test sample, and the excess dust will fall into the pipeline for continuous recycling.
The sand & dust testing services is completed with a sand and dust test chamber. The IEC60529 IP5X IP6X blowing sand dust test chamber simulates the destructiveness of the natural wind and sand climate to the product. It is suitable for testing the shell sealing performance of the product. It is mainly used for the IP5X and IP6X two levels specified in the shell protection level standard test.
The working principle of the IP5X IP6X sand and dust IP test chamber is that a certain concentration of sand and dust is driven by a fan to blow over the surface of the test sample at a certain flow rate to test the ability of these test samples to prevent the penetration effect of dust particles when exposed to dry sand or a dust-filled atmosphere. The ability of the grit to have abrasive or blocking effects and its ability to be stored and run.
The Wewon’s IP5X & IP6X dust chamber has dust-loaded vertical circulation airflow, and the dust used in the test can be recycled. The entire air duct is made of imported high-grade stainless steel. The bottom of the air duct is connected to the conical hopper interface, and the air inlet and outlet of the fan are directly connected to the air duct. Connect the top diffusion port of the studio to the studio body to form an “O” type closed vertical dust blowing circulation system, so that the airflow can flow smoothly and the dust can be dispersed evenly to the greatest extent. The machine adopts a single high-power low-noise centrifugal fan, and the wind speed is adjusted by a frequency converter according to the test needs.
|DIN EN 60068-2-68||Environmental Testing – Part 2: Tests; Test L: Dust and sand (IEC 60068-2-68:1994); German version EN 60068-2-68:1996||IP5X IP6X Blowing Dust Sand Test Standards|
|DIN 40050 Part 9||Road Vehicles– Degrees of Protection (IP Code) Protection against foreign objects, water and access– Electrical Equipment|
|DIN SPEC 79009||DIN SPEC 79009-2018 EPAC bicycles – Environmental test – Safety Aspects|
|IEC 34-5||Rotating electrical machines – Part 5: Classification of degrees of protection provided by enclosures of rotating electrical machines (IP code)|
|DIN EN 60529||CEI IEC 60529｜Degrees of protection provided by enclosures (IP Code)|
|VDE 0470 Part 1||DIN EN 60529 VDE 0470-1:2014-09 Degrees of protection provided by enclosures (IP Code)|
|DIN 40052||Degrees Of Protection Provided By Enclosures; Test To Check Protection Against Ingress Of Solid Foreign Bodies, Dust Chamber|
|MIL-STD-810G||Department Of Defense Test Method Standard: Environmental Engineering Considerations And Laboratory Tests (31 Oct 2008)|
|RTCA DO-160||Environmental Conditions and Test Procedures for Airborne Equipmen|
|AECTP 300-3||AECTP 300 CLIMATIC ENVIRONMENTAL TESTS|
|MIL-STD-202D||Department Of Defense Test Method Standard Electronic And Electrical Component Parts|
|MIL-E-5272||Military Specification: Environmental Testing, Aeronautical And Associated Equipment, General Specification (13-Apr-1959) [S/S By Mil-Std-810]|
|MIL-STD-331||Department Of Defense Test Method Standard: Fuzes, Ignition Safety Devices And Other Related Components, Environmental And Performance Tests For|
|DEF STAN 00-35 Issue 4 Part 3||Environmental Handbook for Defence Materiel｜Part 3 Environmental Test Methods|
There is no difference between IEC 60068-2 and the IEC 68-2 series of standards. Or they are actually a series of standards. Earlier this series of standards was called IEC 68-2, and later it was renamed IEC 60068-2. No direct source and evidence have been found for the change of the number, but it has begun to take shape in the relevant GB/T 2423 series of national standards. In the GB/T 2423 series of national standards, the versions before about 2000 indicate that the standards in the IEC 68-2 series are adopted; Subsequent revisions indicate the use of standards in the IEC 60068-2 series.
From the comparison before and after, it is found that in the new version, the standard of IEC 68-2 is adopted for the early marking, and the revised national standard version will call the IEC standard version adopted in the original version as IEC 60068-2. It is concluded from this that IEC 60068-2 and IEC 68-2 are actually a series of standards, and it is unknown why the standard sequence numbering has changed.
The requirements of IP5X and IP6X are that a limited amount of dust is allowed to enter under certain specified conditions, and no dust is allowed to enter. The dust is very fine, and it is necessary to prevent it from entering. The basic principles of sand and dust test chambers are mentioned in the IEC 60529 test standard. In addition, the powder circulating pump in the closed test chamber can be replaced by other methods that can suspend the talc powder. The talc powder should be filtered through a metal square mesh sieve, the diameter of the metal wire is 50 μm, and the size of the sieve hole is 75 μm. Moreover, the selection of talcum powder should also comply with the regulations of human health and safety. In fact, the test dust of the sand and dust test chamber is not only talcum powder, but also mentioned in other standards such as Portland cement, olivine or soot, etc., and its dust blowing method also has continuous and periodic options.
|If the technical conditions of the specimen are required, the sample should be pretreated according to the requirements, so that the sample remains dry, the dust test is the most part of the shell protection test, usually connected with the defense test, after the sample waterproof test, must wait for it to dry before it can be put into the dust chamber.||1. Pretreatment of the Specimen||IP5X IP6X Blowing Dust Sand Test Procedure|
|If the specimen is not subject to pretreatment conditions, the sample should be placed under the normal atmospheric conditions described below for more than 2H in accordance with the provisions of IEC 60529 standard.|
|The pre-treated unpackaged specimen is placed in the working space of the IEC60529 IP5X IP6X blowing sand dust test chamber, unless the test sample is otherwise specified, otherwise, the sample is not energized and does not work during the test.||2. Sample into Test Room|
|The volume of the sample shall not exceed 1/3 of the effective working space of the test equipment, and the distance between the various specimens and the dust-proof equipment shall not be less than 100MM.|
|Installation of samples with different degrees of protection:||3. Vacuuming|
|A) Protection class of 1P5X, the shell of the first type (Class A) specimen with air pressure in the shell below the surrounding atmospheric pressure during normal use should be set up in close proximity to the easy-to-change parts, and the suction port on the specimen should be connected with the suction port of the vacuum system with a hose.|
|B) Protection class is 1P5X, normal use of the shell air pressure is lower than the surrounding atmospheric pressure of the second type (class B) specimen shell, if the product standard clearly stipulates that the B shell, then the 1P5X test is not evacuated when the inspected product is not vacuumed, if the product standard is not clearly defined, the inspected product is regarded as a class A shell, when the 1P5X test, must be vacuumed. The specimen is placed in the required position specified in the technical conditions of the specimen.|
|c) Samples with a protection level of IP6X, whether it is a Class A sample or a Class B sample, must be evacuated.|
|According to the volume of dustproof test equipment per cubic meter (including the sum of the volume of pipes and working space) for 2kg, the amount of dry talc powder can be put into the screen.||4. Add Talc to the Chute|
|Inspection dust test equipment should be well sealed, should be able to prevent dust escape.||5. Close the glass door of the dust chamber|
|For specimens that need to be vacuumed, when starting the machine, at the same time, start the blower and vacuum extraction system, adjust the valve, so that the vacuum degree and air flow meet the requirements of the technical conditions of the product For the sample that does not need to be vacuumed, only the blower is opened, and the vacuum system is not opened.||6. Power On the Machine|
|After shutting down, open the left door of the chassis, open the valve under the funnel, release the scrapped talc, put the talc powder to be replaced into the screen in the chassis of the dust box, and then manually open the vibration, vibrate the talc powder into the funnel, and borrow the rib wind to enter the working space of the dust-proof test equipment through the air supply.||7. Replace Talc|
|If the technical conditions of the specimen require intermediate testing, after the test reaches the specified time, stop the blower of the vacuum system, and after the dust has completely settled, open the glass door of the dust box and perform intermediate testing without removing the specimen.||8. Downtime|
|For specimens without intermediate detection requirements, when the test time or pumping volume reaches the requirements, stop the operation of the vacuum system and blower, wait for the dust to settle completely, remove the sample, and place 1H-2H under the pretreatment of the specimen (ie” normal atmospheric conditions).|
|A. Check the amount of dust entering the specimen housing and where the dust settles.||9. Final Test|
|B. Check items such as electrical, mechanical properties, etc. according to the technical requirements of the specimen.|
|A. If the technical conditions of the specimen stipulate that “initial measurement” should be made, the measurement should be carried out before the specimen enters the test equipment or before the dust-proof equipment blower is activated.||10. Additional Explanations|
|B. If the specimen volume is too large to enter the dust box equipment, the closed parts of the specimen can be dustproof tested separately according to the technical conditions of the product.|
|C. According to the specifications of the technical conditions of the specimen, a dust-proof test can be carried out with a small specimen with the same structure as the large specimen, and the test result represents the large specimen.|
|D. According to the technical requirements of the specimen, the specimen must be loaded during the test, and the load of the specimen should be added to the dustproof test.|
|E. As a “dusty” talc, before being put into the test equipment, it should be screened with a 200 mesh screen according to the regulations and kept dry.|
|G. Talc should be replaced regularly according to the requirements of the dustproof test.|
|H. Check the suspension of the sample before the H test. Note that vibration may occur at boot time, and it is necessary to prevent the specimen from falling from the hook and the solid vibration due to the unstable suspension, which will cause the sample to hit the wall, resulting in damage to the sample and damage to the dust test chamber.|
|I. The joint of the vacuum system shall not leak air, the gas flow meter and manometer shall be installed and used according to the requirements of the instrument, and the vacuum oil in the vacuum pump should be checked whether the vacuum oil is insufficient and whether the air volume of the blower is appropriate.|