Whma-a-620 Pdf

Where applicable, process indicator conditions are also listed. Today, paper books are not as popular as a couple of decades ago due to the emergence of electronic books ebooks.


It is true that smaller gaps between isolated conductors result in lower breakdown voltages. The development of unique criteria should include user involvement or consent and the criteria developed should include an agreed upon definition for acceptance of each characteristic.

The magnification power requirement is based on the gauge of the wire being inspected. The development committee recognizes that different parts of the industry have different definitions for some terms used herein. Please first verify your email before subscribing to alerts. Assure test fixtures, test adapters, vitamina b pdf and test equipment are maintained to assure the integrity of the test.

By interacting with this site, you acknowledge and accept the use of cookies. This means that the measured resistance starts lower and trends higher over time. When mixed voltages appear on the same assembly, the specific areas and appropriate clearances should be identified on the drawings.

Some cable is identified as double shield. These files are being made available to update existing training PowerPoints in each of the indicated courses with typographical and other editorial corrections for each course. Ring has retained its original color.

Many of the examples figures shown are grossly exaggerated to clearly depict the condition being described. Click here for more information. This question most often arises from those doing work under military contracts where interpretations for different requirements may conflict. Markings are distinct, of uniform height, and of a color that contrasts with the background. Use of this standard requires agreement on the class to which the product belongs.


Prices subject to change without notice. Your purchase of this document contributes to the ongoing development of new and updated industry standards and publications. Space addendum for C course materials are available! Maintain records of tool and equipment calibration and functional testing.

Terminations made with self-sealing heat shrinkable devices are exempt from the cleaning requirements. It is the responsibility of the manufacturer to identify defects and process indicators that are unique to the assembly process. Includes products suitable for applications where the major requirement is the function of the completed assembly. When using cable straps or spot ties, fold the braid over itself, secure, and cover the end with heat shrink tubing or tape.

The minimum electrical clearance distance depends on the circuit voltage rating and the normal volt-ampere rating. This standard does not provide criteria for cross-section or X-ray evaluation. This seems backwards since the closer the spacing, the lower the voltage a connector is likely to be able to withstand. Temporary holding devices, e.

Records are maintained that document calibration. Other documents to extent specified by the user. Any method that produces an assembly conforming to the acceptability requirements described in this standard may be used.


Celsius is used to express temperature. There are many rounds of drafts sent out for review and the committees spend hundreds of hours in review and development. Popular Standards Bundles. Not all process indicators are specified by this standard.

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IPC/WHMA-A-620 Certification DefinitionStandard Subscriptions

The costs of the testing should not increase when the voltage needs to be reduced. We have no amendments or corrections for this standard. Insulation integrity is important to preclude shorting of shields to each other or shorting of shields to the center conductor. In cases where no minimum electrical clearance value is otherwise defined, the criteria in Table may be used as a guideline. In general, the pieces of the connectors must remain as concentric as possible.

Will these test voltages damage them? Visual inspection may be supplemented by the measurement of characteristics appropriate to the product being assembled e. Hotchkiss, Surge Technology, Inc. Even wire for industrial and commercial applications is usually tested in the manufacturing process. Select tools to be used for crimping, cabling, wiring, measuring, inspecting and in work preparation areas appropriate to the intended function.

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If you visit our website hoping to find Ipc Whma A Manual, we are happy to tell you that it is available in all the formats. If you become aware of research that supports the fear of degrading insulation in wiring or connectors with the short-term application of high-voltage, we would deeply appreciate knowing of it. The A requirements specify that electrical tests should operate at such levels as not to degrade the electrical properties. Supplemental lighting may be necessary to assist in visual assessment. This standard prescribes practices and requirements for the manufacture of cable, wire and harness assemblies.

Shield is flush with edge of cone A. If you have any problems, contact our customer support, and they will guide you through the process and answer all of your questions. Prohibit unauthorized, defective, or uncalibrated tools in the work area. Procedures are generated and utilized for the calibration of all tooling stated herein. If the User and Manufacturer do not establish and document the acceptance class, the Manufacturer may do so.

All breakouts need to be properly secured prior to applying the braid. This information is intended to help guide you in understanding why specific tests and their required parameters are needed. Further details of these changes can be found at the bottom of this page.

Shield and shield wire lead contour is tinned and discernible A. Standards may be updated at any time, including with the use of amendments. These criteria apply to both male and female connectors. The A describes requirements for assemblies based on visual criteria. Intervals may be lengthened or shortened on the basis of stability demonstrated over previous calibration periods.

This tie may eventually loosen. Shouldn't they both be minimum times? Certification is not revision specific. Where uncommon or specialized technologies are used, it may be necessary to develop unique acceptance criteria. In addition, the energy levels are very low test current is measured in mA and performed under room temperature conditions.

Translated Training Materials Translated training materials for this program are available. The referee magnification power is intended for use only after a defect has been determined but is not completely identifiable at the inspection power. Examine all elements of tools for physical damage.

None of the information on this page is a substitute for having a copy of the A Rev B standard. Rounding may cause variations between the two actual measurements. In this way it provides a way to train factory floor people.