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Annexes C, D and E are for information only. For standardization purposes, the results of such testing should not depend on the type of testing apparatus and therefore, the characteristics of the various types of test hammers described in this part of IEC are intended to be as close as practicable for the same severity level.
It is important to note that both clause 3 and the test method selected from clauses 4, 5, and 6 need to be complied with in order to satisfy the requirements of this International Standard. The severity levels are, in general, taken from IEC For co-ordination purposes, it has been necessary to change certain fundamental parameters of the previous tests Ef: Impact, pendulum hammer, and Eg: Impact, spring hammer.
In all cases, both sets of parameters are shown at the appropriate places in the text and will remain valid until five years from the publication of this part of IEC At that time, the values in brackets will be removed.
It is used, in particular, to demonstrate an acceptable level of robustness when assessing the safety of a product and is primarily intended for the testing of electrotechnical items.
It consists of the application to the specimen of a prescribed number of impacts defined by their impact energy and applied in the prescribed directions. Three types of test apparatus are applicable to perform these tests. Annex C provides some guidance as to this aspect.
At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC should investigate the possibility of applying the most recent editions of the standards listed below.
The following additional common definitions are also applicable for the purpose of this part of IEC Definitions specific to the tests of clauses 4 and 6 are given therein.
NOTE ï¿½ For the particular application to the pendulum hammer apparatus, see 4. NOTE ï¿½ Figures in brackets appear in current IEC standards, but will be removed five years from the date of publication of this standard. The types of test apparatus are defined in clauses 4, 5 and 6 as tests Eha, Ehb and Ehc respectively.
The co-ordinated characteristics of the striking element are, in principle, similar in all three cases and are stated in table 1, in relation to the outline shown in figure 1. Dimensions are in millimetres. Tolerances are as per class m of ISO , unless otherwise stated. NOTE ï¿½ The values shown in brackets for the equivalent mass and the diameter of the striking element for the energy value equal to or less than 1 J are those in the current test Ef.
The values currently in test Eg are also shown for these two parameters. For co-ordination purposes, the values in brackets will be deleted five years from the publication of this standard.
In order to ensure that the specimen is rigidly supported, it may be necessary when performing the test to place the specimen against a plane solid support, for example a wall or a floor made of brick or concrete, covered by a sheet of polyamide which is tightly fixed to the support.
The mounting arrangement is deemed to be sufficiently rigid if the displacement of the impact surface of the plane support does not exceed 0,1 mm when struck by an impact applied directly to it with the same level of energy as for the specimen. NOTES 1 For specimens to be subjected to impact energies not exceeding 1 J, some examples of mounting and support are shown in figures D.
Unless otherwise specified by the relevant specification, the blows shall be applied perpendicularly to the tested surface. NOTE ï¿½ Account may need to be taken of requirements for functional monitoring see 3. In both cases the relevant specification shall provide the criteria upon which the acceptance or rejection of the specimen is to be based. NOTE ï¿½ Attention is drawn to the fact that, in case of breakage of the specimen, internal parts may become hazardous.
The relevant specification shall prescribe the criteria upon which the acceptance or rejection of the specimen is to be based. NOTES 1 In some IEC standards which include a pendulum hammer test, the term "checking point" has been used but it has not been used here in order to avoid confusion with "check point " in other parts of IEC In practice, the centre of gravity is either difficult to determine or inaccessible, and the measuring point is therefore defined as above.
NOTE ï¿½ When the mass of the arm is evenly distributed, the equivalent mass is equal to the sum of the combined mass of the striking element plus half the mass of the arm. The axis of the pivot is at mm above the measuring point. Currency display settings. Manage society memberships. Featured Products. View All Publishers. Quality Management. SCC Standards Store. Popular Standards Bundles. Drawing and Drafting. Telecommunications Standards. AWS D1. Means, Inc. Active Only. Look Inside. Complete Document.
Includes all amendments and changes through Reaffirmation Notice , June 22, Detail Summary View all details. Price USD. In Stock. Need it fast? Ask for rush delivery. Most backordered items can be rushed in from the publisher in as little as 24 hours. Some rush fees may apply. Add to Cart. JIS C , 11th Edition, June 22, - Environmental testing- Part Tests-Test N: Change of temperature This Standard provides a test to determine the ability of components, equipment or other articles hereafter referred to as "specimens" to withstand rapid changes of ambient temperature.
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Parts inside equipment undergo slower changes of temperature than those on an externalsurface when the equipment is not switched on. Rapid changes of temperature may be expected ï¿½ when equipment is transported from warm indoor environments into cold open air conditions or vice versa, when equipment is suddenly cooled by rainfall or immersion in cold water,- in externally mounted airborne equipment, ï¿½ under certain conditions of transportation and storage.
Components will undergo stresses due to changing temperature when high temperaturegradients build up in an equipment after being switched on,e. Artificially cooled components may be subjected to rapid temperature changes when thecooling system is switched on. Rapid changes of temperature in components may also beinduced during manufacturing processes of equipment. Both the number and amplitude oftemperature changes and the time interval between them are important. The high and low temperatures are understood to be ambient temperatures which will bereached by most specimens with a certain time-lag.
I will not introduce them one by one. And you can have a rough understanding of each standard from its name. From its name, you can infer that this method evaluates the expected effects of solar radiation on products. It illustrates ways of testing equipment or components under simulated solar radiation and water spray environments. IEC is available for English and French. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.
Input this code:. Remember me Log in. Lost your password? Automated page speed optimizations for fast site performance. What is IEC ? Under such circumstances, IEC is a great aid. IEC is a method of environmental testing, specific to the individual types of samples. It is primarily formulated by the IEC Technical Committee 50 to test the two kinds of properties of samples: a the practical running performance in specified limits of temperature, humidity, other environmental conditions, and combinations of these conditions; b the ability to withstand rude handling during transportation, storage, and installation.
Three Parts of IEC IEC General and guidance. IEC Tests. IEC Supporting documentation and guidance. Now, I will introduce each of them in detail one by one. Part 1: IEC Lithium-ion battery copper foil crushing during extrusion. August 8, at am Reply. Jeffry says: IEC is a method of environmental testing, specific to the individual types of samples. August 12, at am Reply. Chante says: IEC battery test standards, is the good article, thanks.