Archive for December, 2010

New MIL-STD-464 Revision C: Electromagnetic Environmental Effects Requirements for Systems

Tuesday, December 21st, 2010

MIL-STD-464C, the Department of Defense’s primary Electromagnetic compatibility (EMC) standard for systems, has just been released.  It is one of Document Center’s best selling military documents.

It is the latest in a long line of standards that goes back to at least MIL‑I‑6051, “Interference Limits and Methods of Measurement; Aircraft Radio and Electronic Installations,” released in 1950. The MIL‑STD‑464 replaced MIL-I-6051D and several other documents in 1997.

MIL‑STD‑464 is the DoD top‑level EMC (aka E3, electromagnetic environmental effects) requirement set for procurement of complete or modified systems.  This might be airborne, sea, space, and ground systems (like a tank or a submarine), including associated ordnance.

This standard contains two sections, the main body and an appendix. The main body of the standard specifies a baseline set of requirements. The appendix portion provides rationale, guidance, and lessons learned for each requirement to enable the procuring activity to tailor the baseline requirements for a particular application. The appendix also permits Government and Industry personnel to understand the purpose of the requirements and potential verification methodology for a design. The appendix is not a mandatory part of this document.

The document states that changes are too numerous to identify due to the extent of the modifications.  However, apart from a few changes to section 2, the revisions seem to cluster in section 3.

This standard, previous editions, and all other publicly distributed DoD standards are available from Document Center Inc. via our website, www.document-center.com, email (info@document-center.com), phone (650-591-7600), and fax (650-591-7617).

Feel free to contact our expert sales staff with any additional questions you might have.

Tags: , , , , , , ,
Posted in Hot Docs - New Standard Releases | No Comments »

MIL-STD-1285 D, Marking of Electrical and Electronic Parts, has a New Change Notice 1 dated 11/10/2010

Thursday, December 9th, 2010

MIL-STD-1285, Revision D, has just been revised by Change Notice 1.  The standard, titled Marking of Electrical and Electronic Parts, has been required for use by military contractors since the 1960′s.

Here’s a summary of the changes that Change 1 makes to the MIL-STD-1285D:
1.  Foreword change DSCC name to DLA Land and Maritime
2.  Paragraph 2.2.1 changed the URL for the ASSIST quicksearch web site.
3.  Paragraph 2.3, add a Uniform Resource Locator (URL) for all documents sited; delete cancel document
“ANSI Y10.5” and add “IEEE 280”.
4.  Paragraph 2.4, changed to include the words “Unless otherwise noted herein or in the contract”.
5.  Paragraph 4.3, replaced cancel document “ANSI Y10.5” with superseded document “IEEE 280”.
6.  Paragraph 6.7 changed “Changes from previous issue” paragraph.
7.  Appendix K, paragraph K.2.2.1, changed the URL for the ASSIST quicksearch web site.
8.  Appendix K, Section K.2.3, changed to include the words “Unless otherwise noted herein or in the contract”.
9.  Appendix L, paragraph L.2.2.1, changed the URL for the ASSIST quicksearch web site.
10.  Appendix L, Section L.2.3 changed to include the words “Unless otherwise noted herein or in the contract”.
11.  Appendix N, Title change.
12.  Appendix N, paragraph N.2.2.1, changed the URL for the ASSIST quicksearch web site.
13.  Appendix N, paragraph N.2.3, add Non-Government publication paragraph.
14.  Appendix N, paragraph N.2.4, changed to include the words “Unless otherwise noted herein or in the contract”.
15.  Appendix N, paragraph N.3.1.1, add “card holders” to existing paragraph.
16.  Appendix N, paragraph N.3.1.2, rename paragraph title.
17.  Appendix N, paragraph N.3.1.2.1, rewritten paragraph.
18.  Appendix N, paragraph N.3.1.2.2, editorial changes.
19.  Appendix N, add paragraphs N.3.1.3, N.3.1.4, and N.3.1.4.1.
20.  Concluding material, changes “Air Force-11” to “Air Force-85” and the ASSIST quicksearch web site.

The new consolidated edition is available at our Document Center Inc. website (www.document-center.com) or by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  Please contact us with any and all questions on government and industry standards.

Tags: ,
Posted in Hot Docs - New Standard Releases | No Comments »

The perils of using free sites for Mil Specs and Standards

Tuesday, December 7th, 2010

There have been a number of sites cropping up on the Internet that offer U.S. military documents for free.  As with most free things, it’s buyer beware!

We speculate that these sites are being generated as a easy method for generating advertising revenue on the various Mil Spec and Standard numbers.  However, for the user of these sites, there are 2 major drawbacks to relying on them for your documentation.

1.  The sites are not maintained, so that the document you download may not be the correct and latest edition of the document.

2.  The sites do not offer monitoring services, so that when the document changes you are not going to be notified.

If you need to comply with military specifications and standards, you need Document Center Inc. to be your supplier of choice.  We have been selling these documents since 1982 and have a long history of providing customers with timely delivery at fair prices for these items.

We monitor over 400,000 standards for our customers, notifying them of changes either on a nightly or bi-monthly basis.  The notification service is either free with the purchase of the standard or can be purchased separately.

Just because a site claims to have “every spec” or “mil-standard” doesn’t mean it’s so.

Contact us at www.document-center.com, by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  Our standards experts can help you identify the correct document for your needs, and will help keep you up-to-date as well!

Posted in Hot Topics in Standardization | No Comments »

MIL-E-17555H has been cancelled without replacement

Tuesday, December 7th, 2010

MIL-E-17555H with Amendment 2, Electronic and Electrical Equipment, Accessories, and Provisioned Items (Repair Parts): Packaging of, has been cancelled.  The document has no replacement.

This will create a challenge for military contractors who provide the Dept. of Defense with electronic and electrical equipment and components.

Should you need a copy of the MIL-E-17555, Revision H or Revision G, they are available from Document Center Inc.   You can also get just the cancellation notice if you need it for your records.  Because the document is canceled, you’ll need to contact Document Center Inc. directly or use our website, www.document-center.com, to get a quote.  We can be reached at 650-591-7600 (phone), 650-591-7617 (fax) or info@document-center.com (email).

Tags: , , , ,
Posted in Hot Docs - New Standard Releases | No Comments »

New JEDEC JESD22-A110D Released

Friday, December 3rd, 2010

JESD-22-A110 Revision D, Highly Accelerated Temperature and Humidity Stress Test (HAST),  has just been released in November.  It is one in a series of specialized tests for solid state devices maintained by the JEDEC Solid State Technology Association.

The purpose of this test method is to evaluate the reliability of nonhermetic packaged solid state devices in humid environments. It employs severe conditions of temperature, humidity, and bias that accelerate the penetration of moisture through the external protective material (encapsulant or seal) or along the interface between the external protective material and the metallic conductors which pass through it.

The change made to the new  JESD22-A110 D, compared to its predecessor, JESD22-A110 C (January 2009) is the addition of  Note 1 and Note 2 in Clause 4.5.

The change to the JESD22-A110 C compared to the JESD22-A110 B, was the addition of a note in Clause 4.4.

Copies of this standard may be purchased from Document Center Inc. at it’s website (www.document-center.com) or by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  Document Center Inc. carries all the JEDEC standards under license agreement with the association.

Tags: , , , , , ,
Posted in Hot Docs - New Standard Releases | No Comments »