Re: Steel ball for impact tests
I read in !emc-pstc that umbdenst...@sensormatic.com wrote (in 846BF526A205F84BA2B6045BBF7E9A6A21967C@flbocexu05) about 'Steel ball for impact tests', on Wed, 26 Sep 2001: Searching for a new sport, Check aircraft cockpit windows for resistance to bird strike by projecting chicken carcasses at them. Don't forget to defrost the carcasses! -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
Don's message brings up a key consideration for any type of test that is performed - repeatability. If you can't repeat the results, you need to re-evaluate your methodology. For instance, in the event you had a failure, it would be difficult to determine if your fix actually worked. John Juhasz Fiber Options Bohemia, NY -Original Message- From: umbdenst...@sensormatic.com [mailto:umbdenst...@sensormatic.com] Sent: Wednesday, September 26, 2001 9:05 AM To: emc-p...@majordomo.ieee.org; sco...@world.std.com Subject: RE: Steel ball for impact tests Scott, You had indicated that A tube is nice but not needed if you can drop the weight accurately. . . I also used to test bombs away, somewhat as a sport to see how close I could come to the desired spot. We had an interesting experienced that permanently changed our approach. We had a device with a plastic enclosure with re-enforcing ribs in various locations. When we eyeballed the drop, we would miss critical spots by 1/2. Didn't seem like much at the time, until we discovered that with the tube, we could hit exactly the critical spot and observed that the enclosure failed unsafely (and repeatably), i.e., hazardous voltages were exposed. This is something you want to discover prior to having a NRTL witness or perform the test. Searching for a new sport, Don Umbdenstock Sensormatic -- From: Scott Lacey[SMTP:sco...@world.std.com] Reply To: Scott Lacey Sent: Tuesday, September 25, 2001 5:38 PM To: emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests To the group: Having monitored some of the discussion on this thread, I thought that I would weigh in with some of my experience with this test. The purpose of the test is to subject the E.U.T. to a specific force of impact from a hard steel impactor (ball) of known radius. The surface should be smooth to avoid subjecting the E.U.T. to additional point stress (the center punch effect). Anything else is frosting on the cake. It does not matter whether the ball is dropped or swung, as long as the force is consistent and the E.U.T. is firmly mounted. A ball bearing is perfect for the job. A typical chrome steel ball is more than hard enough to meet the specification. If the weight is a little off just raise or lower the drop height to compensate. An eyebolt is nice but not really needed. The reason the official balls cost so much is the difficulty of machining the ball for the bolt, and the fact that these are very low volume items. A trailer hitch ball will also work without modification. Just weigh it, calculate the drop height, hold it by the threaded bit and bombs away. A tube is nice but not needed if you can drop the weight accurately. The idea of standing on a chair is excellent as a 1kg ball can make a serious bruise! I would also recommend padding the floor (except under the E.U.T.) with cardboard or carpeting scraps so the ball won't get all scratched up. If you really must have an eyebolt and don't want to spend the money thread a flanged nut onto an eyebolt and epoxy it onto the ball with a steel-filled epoxy (common at auto parts stores). It may break off occasionally but you can just re-epoxy it. Just degrease all the parts before gluing and it works surprisingly well. Have Fun Scott Lacey --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
Scott, You had indicated that A tube is nice but not needed if you can drop the weight accurately. . . I also used to test bombs away, somewhat as a sport to see how close I could come to the desired spot. We had an interesting experienced that permanently changed our approach. We had a device with a plastic enclosure with re-enforcing ribs in various locations. When we eyeballed the drop, we would miss critical spots by 1/2. Didn't seem like much at the time, until we discovered that with the tube, we could hit exactly the critical spot and observed that the enclosure failed unsafely (and repeatably), i.e., hazardous voltages were exposed. This is something you want to discover prior to having a NRTL witness or perform the test. Searching for a new sport, Don Umbdenstock Sensormatic -- From: Scott Lacey[SMTP:sco...@world.std.com] Reply To: Scott Lacey Sent: Tuesday, September 25, 2001 5:38 PM To: emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests To the group: Having monitored some of the discussion on this thread, I thought that I would weigh in with some of my experience with this test. The purpose of the test is to subject the E.U.T. to a specific force of impact from a hard steel impactor (ball) of known radius. The surface should be smooth to avoid subjecting the E.U.T. to additional point stress (the center punch effect). Anything else is frosting on the cake. It does not matter whether the ball is dropped or swung, as long as the force is consistent and the E.U.T. is firmly mounted. A ball bearing is perfect for the job. A typical chrome steel ball is more than hard enough to meet the specification. If the weight is a little off just raise or lower the drop height to compensate. An eyebolt is nice but not really needed. The reason the official balls cost so much is the difficulty of machining the ball for the bolt, and the fact that these are very low volume items. A trailer hitch ball will also work without modification. Just weigh it, calculate the drop height, hold it by the threaded bit and bombs away. A tube is nice but not needed if you can drop the weight accurately. The idea of standing on a chair is excellent as a 1kg ball can make a serious bruise! I would also recommend padding the floor (except under the E.U.T.) with cardboard or carpeting scraps so the ball won't get all scratched up. If you really must have an eyebolt and don't want to spend the money thread a flanged nut onto an eyebolt and epoxy it onto the ball with a steel-filled epoxy (common at auto parts stores). It may break off occasionally but you can just re-epoxy it. Just degrease all the parts before gluing and it works surprisingly well. Have Fun Scott Lacey --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
Just don't let your ESH people see you standing on a chair to perform this test. ; ) Scott Lacey scottl%world.std@interlock.lexmark.com on 09/25/2001 05:38:44 PM Please respond to Scott Lacey scottl%world.std@interlock.lexmark.com To: emc-pstc%majordomo.ieee@interlock.lexmark.com cc:(bcc: Oscar Overton/Lex/Lexmark) Subject: RE: Steel ball for impact tests To the group: Having monitored some of the discussion on this thread, I thought that I would weigh in with some of my experience with this test. The purpose of the test is to subject the E.U.T. to a specific force of impact from a hard steel impactor (ball) of known radius. The surface should be smooth to avoid subjecting the E.U.T. to additional point stress (the center punch effect). Anything else is frosting on the cake. It does not matter whether the ball is dropped or swung, as long as the force is consistent and the E.U.T. is firmly mounted. A ball bearing is perfect for the job. A typical chrome steel ball is more than hard enough to meet the specification. If the weight is a little off just raise or lower the drop height to compensate. An eyebolt is nice but not really needed. The reason the official balls cost so much is the difficulty of machining the ball for the bolt, and the fact that these are very low volume items. A trailer hitch ball will also work without modification. Just weigh it, calculate the drop height, hold it by the threaded bit and bombs away. A tube is nice but not needed if you can drop the weight accurately. The idea of standing on a chair is excellent as a 1kg ball can make a serious bruise! I would also recommend padding the floor (except under the E.U.T.) with cardboard or carpeting scraps so the ball won't get all scratched up. If you really must have an eyebolt and don't want to spend the money thread a flanged nut onto an eyebolt and epoxy it onto the ball with a steel-filled epoxy (common at auto parts stores). It may break off occasionally but you can just re-epoxy it. Just degrease all the parts before gluing and it works surprisingly well. Have Fun Scott Lacey To the group: Having monitored some of the discussion on this thread, I thought that I would weigh inwith some of my experience with this test. The purpose of the test is to subject the E.U.T. to a specific force of impact from a hard steel impactor (ball) of known radius. The surface should be smooth to avoid subjecting the E.U.T. to additional point stress (the "center punch" effect). Anything else is frosting on the cake. It does not matter whether the ball is dropped or swung, as long as the force is consistent and the E.U.T. is firmly mounted. A ball bearing is perfect for the job. A typical chrome steel ball is more than hard enough to meet the specification. If the weight is a little off just raise or lower the drop height to compensate. An eyebolt is nice but not really needed. The reason the "official" balls cost so much is the difficulty of machining the ball for the bolt, and the fact that these are very low volume items. A trailer hitch ball will also work without modification. Just weigh it, calculate the drop height, hold it by the threaded bit and "bombs away". A tube is nice but not needed if you can drop the weight accurately. The idea of standing on a chair is excellent as a 1kg ball can make a serious bruise! I would also recommend padding the floor (except under the E.U.T.) with cardboard or carpeting scraps so the ball won't get all scratched up. If you really must have an eyebolt and don't want to spend the money thread a flanged nut onto an eyebolt and epoxy it onto the ball with a steel-filled epoxy (common at auto parts stores). It may break off occasionally but you can just re-epoxy it. Just degrease all the parts before gluing and it works surprisingly well. Have Fun Scott Lacey
RE: Steel ball for impact tests
PLEASE NOTE THAT IT IS 500gms +- 25gms Best regards Gregg -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Scott Lacey Sent: Tuesday, September 25, 2001 5:39 PM To: emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests threaded bit and bombs away. A tube is nice but not needed if you can drop the weight accurately. The idea of standing on a chair is excellent as a 1kg ball can make a serious bruise! I would also recommend padding the floor (except under the E.U.T.) with cardboard or carpeting scraps so the ball won't get all scratched
RE: Steel ball for impact tests
I suspect we'd have to recalibrate every time we use the steel ball. There's bound to be deformity in the ball due to impact as well as a decrease in mass due to steel ball residue left behind after contact. Who knows...enough tests might result in a reduction of mass plus radically different drag coefficient and render all future testing with the said steel ball questionable without continued calibration. If Superman worked in a test lab, I wonder what his thoughts would bewith his super brain and all? My 2 cents and not that of my employer. Regards, Kaz -Original Message- From: Stephen Phillips [mailto:step...@cisco.com] Sent: Tuesday, September 25, 2001 7:38 AM To: Jacob Schanker Cc: emc-p...@majordomo.ieee.org Subject: Re: Steel ball for impact tests I think they let that slide. If they didn't, then you'd have to respond to the manufacturers who use denser materials for their products. Since all objects (anything, having mass) gravitationally attract each other, the impact to a product of greater density is going to be relatively greater (no matter how difficult to quantify) than that to a product of lesser density. Maybe we should recalibrate the ball based on a reading of relative spacetime curvature per product. Stephen At 11:53 PM 9/24/2001, Jacob Schanker wrote: The mention of traceable calibration for a steel ball makes me wonder (tongue partially in cheek) about verification of the gravitational constant involved in the testing. Are adjustments to be made for local gravitational anomalies, altitude above sea level at the place of measurement, and the mass of the item tested (gravitational attraction being a function of mass)? :) Jack Jacob Z. Schanker, P.E. 65 Crandon Way Rochester, NY 14618 Phone: 716 442 3909 Fax: 716 442 2182 j.schan...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
OT: RE: Steel ball for impact tests
-Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Monday, September 24, 2001 11:19 PM To: emc-p...@majordomo.ieee.org Subject: Re: Steel ball for impact tests I read in !emc-pstc that Jacob Schanker j.schan...@worldnet.att.net wrote (in 003101c14575$a8b4dcc0$2ef1fea9@f0p1o1) about 'Steel ball for impact tests', on Mon, 24 Sep 2001: The mention of traceable calibration for a steel ball makes me wonder (tongue partially in cheek) about verification of the gravitational constant involved in the testing. Are adjustments to be made for local gravitational anomalies, altitude above sea level at the place of measurement, and the mass of the item tested (gravitational attraction being a function of mass)? Yes, of course, and a campaign must immediately be launched to write a specification and certify all these guide tubes that people are using. Just think, some of them may have cost less than USD1000. Draft specification Material: PTFE 99.99% pure Inside diameter 50.2000 mm Length: 1.0 m Straightness: 10^-6 Concentricity: 0.0002% Air release hole diameter: 4.000 mm Air release hole pitch: 45.000 mm Colour: Optional, but uniform and subdued. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! John, I have finally found my market niche. Announcing the formation of the International Impact Tube Standardization Accreditation Authority (IITSAA). Be aware that I have copyrighted the characteristic Schlooorp! sound of the standard ball and tube. Further, Schlooorp! is now a registered trademark of the Authority, and the creation of the Schlooorp! sound by unlicensed tube balls will not be tolerated. The authority will protect its trademarks and copyrights vigorously, as we expect significant licensing ventures, starting with the underwear and coffee mug markets. Ed [Don't tell Cubic about this quite yet] Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Steel ball for impact tests
I think they let that slide. If they didn't, then you'd have to respond to the manufacturers who use denser materials for their products. Since all objects (anything, having mass) gravitationally attract each other, the impact to a product of greater density is going to be relatively greater (no matter how difficult to quantify) than that to a product of lesser density. Maybe we should recalibrate the ball based on a reading of relative spacetime curvature per product. Stephen At 11:53 PM 9/24/2001, Jacob Schanker wrote: The mention of traceable calibration for a steel ball makes me wonder (tongue partially in cheek) about verification of the gravitational constant involved in the testing. Are adjustments to be made for local gravitational anomalies, altitude above sea level at the place of measurement, and the mass of the item tested (gravitational attraction being a function of mass)? :) Jack Jacob Z. Schanker, P.E. 65 Crandon Way Rochester, NY 14618 Phone: 716 442 3909 Fax: 716 442 2182 j.schan...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Steel ball for impact tests
I read in !emc-pstc that Jacob Schanker j.schan...@worldnet.att.net wrote (in 003101c14575$a8b4dcc0$2ef1fea9@f0p1o1) about 'Steel ball for impact tests', on Mon, 24 Sep 2001: The mention of traceable calibration for a steel ball makes me wonder (tongue partially in cheek) about verification of the gravitational constant involved in the testing. Are adjustments to be made for local gravitational anomalies, altitude above sea level at the place of measurement, and the mass of the item tested (gravitational attraction being a function of mass)? Yes, of course, and a campaign must immediately be launched to write a specification and certify all these guide tubes that people are using. Just think, some of them may have cost less than USD1000. Draft specification Material: PTFE 99.99% pure Inside diameter 50.2000 mm Length: 1.0 m Straightness: 10^-6 Concentricity: 0.0002% Air release hole diameter: 4.000 mm Air release hole pitch: 45.000 mm Colour: Optional, but uniform and subdued. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Steel ball for impact tests
The mention of traceable calibration for a steel ball makes me wonder (tongue partially in cheek) about verification of the gravitational constant involved in the testing. Are adjustments to be made for local gravitational anomalies, altitude above sea level at the place of measurement, and the mass of the item tested (gravitational attraction being a function of mass)? :) Jack Jacob Z. Schanker, P.E. 65 Crandon Way Rochester, NY 14618 Phone: 716 442 3909 Fax: 716 442 2182 j.schan...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
-Original Message- From: Ehler, Kyle [mailto:keh...@lsil.com] Sent: Monday, September 24, 2001 1:29 PM To: 'Dan Irish - Sun BOS Hardware'; emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests What about calibration? Is a trailer ball NIST traceable? =:P As a 'CTDP' participant I have to maintain a cal list on all instruments I use in the course of my tests and include it with any test reports I ship to agencies. I had to get my certified 'sphere' calibrated recently. -Not that it changes much or is easily adjustable. It was not cheap for this paperwork turn on 'ol ironhead'. If'n you purchase a new sphere, you get a nice cal cert along with it. I would venture that your time making and cal'ing/correcting a trailer ball to spec and getting it cert is just as expensive. Regards, Kyle Ehler KCOIQE mailto:kyle.eh...@lsil.com mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Storage Systems Div. 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8321 -Original Message- From: Dan Irish - Sun BOS Hardware [ mailto:dan.ir...@sun.com mailto:dan.ir...@sun.com ] Sent: Monday, September 24, 2001 10:22 AM To: emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests The cheapest way to go is to get a 2 trailer ball from WalMart and cut off the flange and threads with a hacksaw or Sawzall. File to a spherical shape. Drill and tap a hole for an eye bolt that can be installed for the pendulum test. About $10 US? Dan From: JENKINS, JEFF jeff.jenk...@aei.com To: 'Jon Jones' jon.jo...@ascom.co.uk, Emc-Pstc (E-mail) emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests Date: Mon, 24 Sep 2001 08:33:20 -0600 MIME-Version: 1.0 X-Resent-To: Multiple Recipients emc-p...@majordomo.ieee.org X-Listname: emc-pstc X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org Try: Ergonomics, Inc. 1-800-862-0102 ask for Eric George e...@ergonomicsusa.com www.ergonomicsusa.com Regards, Jeff Jenkins Advanced Energy Industries, Inc. Fort Collins, CO -Original Message- From: Jon Jones [ mailto:jon.jo...@ascom.co.uk mailto:jon.jo...@ascom.co.uk ] Sent: Monday, September 24, 2001 7:00 AM To: Emc-Pstc (E-mail) Subject: Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy
Re: Steel ball for impact tests
I read in !emc-pstc that umbdenst...@sensormatic.com wrote (in 846BF526A205F84BA2B6045BBF7E9A6A219676@flbocexu05) about 'Steel ball for impact tests', on Mon, 24 Sep 2001: Additional holes should also be drilled along the length of the pipe to prevent pressure build-up as the ball falls to the bottom of the pipe. Make the holes VERY VERY small and everything will pass. (;-) Seriously, the diameter needs to be at least 4 mm or the wall thickness of the tube, whichever is greater, and the pitch should be less than 50 mm. (Based on rules of thumb for flow-resistance of air.) -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
What about calibration? Is a trailer ball NIST traceable? =:P As a 'CTDP' participant I have to maintain a cal list on all instruments I use in the course of my tests and include it with any test reports I ship to agencies. I had to get my certified 'sphere' calibrated recently. -Not that it changes much or is easily adjustable. It was not cheap for this paperwork turn on 'ol ironhead'. If'n you purchase a new sphere, you get a nice cal cert along with it. I would venture that your time making and cal'ing/correcting a trailer ball to spec and getting it cert is just as expensive. Regards, Kyle Ehler KCOIQE mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Storage Systems Div. 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8321 -Original Message- From: Dan Irish - Sun BOS Hardware [mailto:dan.ir...@sun.com] Sent: Monday, September 24, 2001 10:22 AM To: emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests The cheapest way to go is to get a 2 trailer ball from WalMart and cut off the flange and threads with a hacksaw or Sawzall. File to a spherical shape. Drill and tap a hole for an eye bolt that can be installed for the pendulum test. About $10 US? Dan From: JENKINS, JEFF jeff.jenk...@aei.com To: 'Jon Jones' jon.jo...@ascom.co.uk, Emc-Pstc (E-mail) emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests Date: Mon, 24 Sep 2001 08:33:20 -0600 MIME-Version: 1.0 X-Resent-To: Multiple Recipients emc-p...@majordomo.ieee.org X-Listname: emc-pstc X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org Try: Ergonomics, Inc. 1-800-862-0102 ask for Eric George e...@ergonomicsusa.com www.ergonomicsusa.com Regards, Jeff Jenkins Advanced Energy Industries, Inc. Fort Collins, CO -Original Message- From: Jon Jones [mailto:jon.jo...@ascom.co.uk] Sent: Monday, September 24, 2001 7:00 AM To: Emc-Pstc (E-mail) Subject: Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
And how much for the Calibration Certificate? BTW - I have NEVER (in 10 years) used the pendulum test - I have placed the UUT (or a representative piece) on the floor and dropped the steel ball through a tube onto the test piece. (IMPORTANT NOTE - STAND ON A CHAIR - it bounces and it hurts!!!) On a more serious note - please check out i...@ergonomicsusa.com and ask about the COMPLETE LVD SET - this product includes all essential test equipment plus CD based training plus templates for test methods as well as report templates for the most common IEC/EN/UL standards. Best regards Gregg -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Dan Irish - Sun BOS Hardware Sent: Monday, September 24, 2001 11:22 AM To: emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests The cheapest way to go is to get a 2 trailer ball from WalMart and cut off the flange and threads with a hacksaw or Sawzall. File to a spherical shape. Drill and tap a hole for an eye bolt that can be installed for the pendulum test. About $10 US? Dan From: JENKINS, JEFF jeff.jenk...@aei.com To: 'Jon Jones' jon.jo...@ascom.co.uk, Emc-Pstc (E-mail) emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests Date: Mon, 24 Sep 2001 08:33:20 -0600 MIME-Version: 1.0 X-Resent-To: Multiple Recipients emc-p...@majordomo.ieee.org X-Listname: emc-pstc X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org Try: Ergonomics, Inc. 1-800-862-0102 ask for Eric George e...@ergonomicsusa.com www.ergonomicsusa.com Regards, Jeff Jenkins Advanced Energy Industries, Inc. Fort Collins, CO -Original Message- From: Jon Jones [mailto:jon.jo...@ascom.co.uk] Sent: Monday, September 24, 2001 7:00 AM To: Emc-Pstc (E-mail) Subject: Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael
RE: Steel ball for impact tests
Jon, Several years ago, we contacted a ball-bearing company and told them what we needed regarding the weight and diameter. They had no problem providing a suitable ball. (It would not surprise me if this was the origin of the steel ball standard.) The cost was about $6 per ball. Originally we modified one ball to attach a hook, but now we do most if not all of our tests with a vertical drop. Rotating the EUT so that the vertical side is horizontal and using a vertical drop test is equivalent to the swinging ball test, and more repeatable. For the ultimate in repeatability, obtain a piece of 2 ID PVC pipe just slightly longer than the required drop. Drill a hole through the pipe at the end to be designated the top to accommodate a screw driver shaft. The distance from this hole to the bottom of the pipe should match the height spec of the standard. Additional holes should also be drilled along the length of the pipe to prevent pressure build-up as the ball falls to the bottom of the pipe. The test goes something like this: Place the EUT on a suitable surface. Identify the area of the EUT surface where impact is desired. Place pipe vertically over (not in contact with) the target. Insert screwdriver in the correct hole at the top of the pipe. Place steel ball in the pipe, resting on the screw driver shaft. Withdraw the screwdriver and WHAM (bulls-eye every time). This is repeatable enough that you can hit your big toe (or even your little toe!) every time :-( Best regards, Don Umbdenstock Sensormatic -- From: Jon Jones[SMTP:jon.jo...@ascom.co.uk] Reply To: Jon Jones Sent: Monday, September 24, 2001 8:59 AM To: Emc-Pstc (E-mail) Subject: Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
Jon, Try the EDD at http://www.productsafet.com/main.html . Best Regards, Leszek M. Langiewicz Homologation / Power Distribution Phogenix Imaging, LLC A joint venture of Kodak and HP Phogenix Imaging LLC 16275 Technology Dr. San Diego, CA 92127-1815 www.phogenix.com Phone: (858) 798-8004 Cell: (858) 722-8004 Fax: (858) 798-8113 E-mail: leszek_langiew...@phogenix.com -Original Message- From: Jon Jones [mailto:jon.jo...@ascom.co.uk] Sent: Monday, September 24, 2001 6:00 AM To: Emc-Pstc (E-mail) Subject:Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Steel ball for impact tests
Jon, contact Eric George Ergonomics, Inc. Product Safety and EMC Test Equipment P.O. Box 964 Southampton, PA 18966 800-862-0102/215-357-5124 Fax 215-364-7582 i...@ergonomicsusa.com www.ergonomicsusa.com The above is being forwarded and should not be construed as an endorsement by either myself or my employer. Paul J. Smith, Teradyne Inc., Boston Jon Jones jon.jo...@ascom.co.uk@majordomo.ieee.org on 09/24/2001 08:59:38 AM Please respond to Jon Jones jon.jo...@ascom.co.uk Sent by: owner-emc-p...@majordomo.ieee.org To: Emc-Pstc (E-mail) emc-p...@majordomo.ieee.org cc: Subject: Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
Or, you can go to a ball bearing company and get one for $15. -Original Message- From: Dan Irish - Sun BOS Hardware [SMTP:dan.ir...@sun.com] Sent: Monday, September 24, 2001 9:22 AM To: emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests The cheapest way to go is to get a 2 trailer ball from WalMart and cut off the flange and threads with a hacksaw or Sawzall. File to a spherical shape. Drill and tap a hole for an eye bolt that can be installed for the pendulum test. About $10 US? Dan From: JENKINS, JEFF jeff.jenk...@aei.com To: 'Jon Jones' jon.jo...@ascom.co.uk, Emc-Pstc (E-mail) emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests Date: Mon, 24 Sep 2001 08:33:20 -0600 MIME-Version: 1.0 X-Resent-To: Multiple Recipients emc-p...@majordomo.ieee.org X-Listname: emc-pstc X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org Try: Ergonomics, Inc. 1-800-862-0102 ask for Eric George e...@ergonomicsusa.com www.ergonomicsusa.com Regards, Jeff Jenkins Advanced Energy Industries, Inc. Fort Collins, CO -Original Message- From: Jon Jones [mailto:jon.jo...@ascom.co.uk] Sent: Monday, September 24, 2001 7:00 AM To: Emc-Pstc (E-mail) Subject: Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Steel ball for impact tests
I read in !emc-pstc that Jon Jones jon.jo...@ascom.co.uk wrote (in D1D4A262894FD511A65900902707BB241B3638@CARDIFF-NT-MAIL) about 'Steel ball for impact tests', on Mon, 24 Sep 2001: Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Find a caravan and get your hacksaw.(;-) A metric towing ball is 50 mm diameter. I'm not sure about the mass; I get 517 g for a mild steel ball. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Steel ball for impact tests
The cheapest way to go is to get a 2 trailer ball from WalMart and cut off the flange and threads with a hacksaw or Sawzall. File to a spherical shape. Drill and tap a hole for an eye bolt that can be installed for the pendulum test. About $10 US? Dan From: JENKINS, JEFF jeff.jenk...@aei.com To: 'Jon Jones' jon.jo...@ascom.co.uk, Emc-Pstc (E-mail) emc-p...@majordomo.ieee.org Subject: RE: Steel ball for impact tests Date: Mon, 24 Sep 2001 08:33:20 -0600 MIME-Version: 1.0 X-Resent-To: Multiple Recipients emc-p...@majordomo.ieee.org X-Listname: emc-pstc X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org Try: Ergonomics, Inc. 1-800-862-0102 ask for Eric George e...@ergonomicsusa.com www.ergonomicsusa.com Regards, Jeff Jenkins Advanced Energy Industries, Inc. Fort Collins, CO -Original Message- From: Jon Jones [mailto:jon.jo...@ascom.co.uk] Sent: Monday, September 24, 2001 7:00 AM To: Emc-Pstc (E-mail) Subject: Steel ball for impact tests Can anyone detail a manufacturer / supplier who can supply the steel ball for impact tests as per EN60950:2000 clause 4.2.5. (50mm diameter, 500g) Thanks in advance, Jon Jones --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
