ASTM D924 PDF

ASTM D Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids. Find the most up-to-date version of ASTM D at Engineering We perform testing by ASTM D on electrical insulating liquids used in cables, transformers, oil circuit breakers, and other electrical apparatus.

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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Caution should be taken when handling mercury and mercury containing products. The operation display can be pulled out as the pictures show: Measured temperature and system clock. Precision and Bias Both measurements should be made asfm the same temperature. Astmm concentric cylinders are of nickel-plated brass which are mounted on a TFE-uorocarbon base and contained in an mL borosilicate glass beaker.

ASTM D924 Large-Screen Auto Washing Insulating Oil Dielectric Loss Tester

Wash the component parts with a mild abrasive soap or detergent. A superscript epsilon indicates an editorial change since the last revision or reapproval. Due regard should be given to the precautions outlined in Section The tester is characterized by integrated aatm, and integrates test cell, temperature controller, temperature r924, dielectric loss test bridge, AC test power, standard capacitor, high resistance meter, DC high voltage source and other major components.

Large-screen LCD,backlight, display is clear. Typical questions asked about products Does this product support v924 Stir the uid frequently during heating. For tests at room temperature the unheated oven can be conveniently used as the test chamber.

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The alignment of the electrodes shall not be inuenced by this temperature f924 by the operation of lling the cell with the test liquid. Once receive your question, the supplier will answer you as soon as possible. The dissipation factor of these insulating materials must necessarily be low, particularly that between the guard and measuring electrodes; otherwise difficulty may be experienced in balancing the guard circuits at elevated temperatures.

Record data as soon as the test temperature is reached. Wooden Box with Foam Inside.

If the difference between the third measurement and either the rst or second is not within 0. Send your message to this supplier. Huazheng Electric Manufacturing Baoding Co. Contact Now Customized Request. Please see the below display and the operation details: It is therefore desirable that the elapsed time necessary for the test specimen to attain temperature equilibrium with the test cell be held to a minimum.

If the measured value of the last sample tested was greater than the specied value, the test cell shall be cleaned before being used for further tests.

Use a shielded wire or coaxial cable for connecting the guard and measuring electrodes to the bridge. We have our own manufacturing factory,pls see the below certificate,we are the direct c924. Find Similar Products By Category.

ASTM D液体绝缘材料介质损耗测试法_百度文库

Take extreme care during the washing and rinsing of some test cells to prevent any moisture from entering the thermometer well in the inner electrode. Some liquids, such as oils of petroleum origin, undergo changes when exposed to sunlight.

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Current edition approved Nov. Historical Version s – view previous versions of standard Translated Version s: Contact Supplier Start Order. However, an intermediate value of relative permittivity may sometimes be advantageous in achieving a better voltage distribution of a-c electric elds between the liquid and solid insulating materials with which the liquid may be in series. For decimal values up to 0. No fumigation,not influence the delivery; 4.

When used as the dielectric in a capacitor, it is desirable to have a higher value of relative permittivity so the physical size of the capacitor may be as small as possible.

What is the warranty astmm the product? We Do Our Best for You! Rinse all parts thoroughly with hot tap water, then with cold tap s924, followed by several rinses with distilled water. Get Latest Price Min. Solvents mentioned in Mercury, or its vapor, may be hazardous to health and corrosive to materials. Metals that have been found satisfactory from this standpoint are gold, nickel, Monel, platinum, and stainless steel. HS code is ; 2.

Take care not to lay the electrodes on any surface. Allow the sealed container to stand undisturbed in the room in which the test is to be made for a sufficient period of time to permit the sample to attain room temperature before it is opened.