RE: MIL STD 461
Derek, This link worked for me. http://astimage.daps.dla.mil/quicksearch/ Rocky -)-(- -Original Message- From: lfresea...@aol.com [mailto:lfresea...@aol.com] Sent: Friday, July 07, 2000 9:35 AM To: emc-p...@ieee.org Subject: MIL STD 461 Hi, can anyone remind me where the MIL STD 461 can be download from? Thanks, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
MIL STD 461
Hi, can anyone remind me where the MIL STD 461 can be download from? Thanks, Derek. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
buss bar systems
I am looking for information and/or installers for a lab buss bar system. We have many micro- shielded enclosures and other screen rooms that I want to ground together. Thx, Ron, DENSO --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Voltage Breakdown
Hi Allen: The voltage breakdown of air is presented in IEC 664. There is no fixed number (i.e., mm/kV) that describes or predicts voltage breakdown of air. The principle factor that affects voltage breakdown is the shape of the electrodes (degree of homogeneousness of the electric field between the two electrodes). The more homogeneous the field, the higher the breakdown voltage, and vice versa. For example, at 2 mm, the breakdown of an inhomogeneous field is about 2.5 kV, while the breakdown of an homogeneous field is almost 8 kv! An homogeneous field is created by two parallel planes. An inhomogeneous field is created by a needle-point and a plane. The second factor that affects voltage breakdown of air is the voltage waveshape. The more impulse-type waveshape, the higher the breakdown voltage; the more sinusoidal-type waveshape, the lower the breakdown voltage. The third factor that affects voltage breakdown of air is the air pressure. The higher the air pressure, the higher the breakdown voltage, and vice-versa (Paschen's Law). There are still other factors such as temperature, but these are minor effects compared to the first three. If you are interested, I can send a Powerpoint 4.0 file of the voltage-distance curves of the homogeneousness effect. It covers the distance range from 0 to 2 mm for both homogeneous and inhomogeneous fields for sinsoidal waveforms. The data is taken from IEC 664. Best regards, Rich --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Voltage Breakdown
I remember seeing a figure for voltage breakdown through air recently, but can't remember what it is. Seems like it's 1mm per 1000 volts or something like that. Can anyone help? Specifically, I'm concerned about how much spacing is required between components and chassis to guard against electric field coupling during an ESD event. Thanks. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Voltage Breakdown
I remember seeing a figure for voltage breakdown through air recently, but can't remember what it is. Seems like it's 1mm per 1000 volts or something like that. Can anyone help? Specifically, I'm concerned about how much spacing is required between components and chassis to guard against electric field coupling during an ESD event. Thanks. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Warnings (humor).
Here are some more strange warnings on items: On a packet of juggling balls: "This product contains small granules under 3 millimeters. Not suitable for children under the age of 14 years in Europe or 8 years in the USA." Seen on a camera: "This camera only works when there is film inside." On a bottle of flavored milk drink: "After opening, keep upright." On a can of windscreen de-icing spray: "Spray works in sub-zero temperatures." On a can of insect spray: "Kills all kinds of insects! Warning: This spray is harmful to bees." A different brand of insect spray: "Kills flies, wasps, mosquitoes, midges, and other flying insects. Not tested on animals." On an ocean buoy for determining the position of submarines: "Protect from seawater." --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Health and Safety Issues
Tony, Are you not familiar with the Manual Handling Regulations? If not, I suggest you acquire a copy of the Approved Code Of Practice which provides a good deal of guidance on this matter. The MHR are UK legislation, and therefore they and the ACOP take precedence over anything said in any standard. Drop me a line if you want ISBN etc for the ACOP. Regards Nick. At 10:25 +0100 6/7/2000, Tony Reynolds wrote: Dear Group, I am trying to find some guidance regarding the maximum allowable weight of a product for a single person to self install. IEC950 and it's offspring (UL1950, EN60950, etc.) all quote that 18kg is the maximum weight for a moveable piece of equipment. However IT products such as laser printers can weigh more than 18kg. Is it the manufacturers responsibility to advise the purchaser that a product weighs xx kg and therefore 2 people are required to lift the product out of the box? Also does this vary from country to country. Thanks Tony Reynolds Pitney Bowes Ltd Tel (01279) 449479 Fax (01279) 449118 E-Mail: reyno...@pb.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
