Portable Battery Standard Development Announcement

Folks, With the indulgence of the list-server administrators (many thanks) and a bit beyond the usual safety/emc (and Friday humor) subject matter, please be advised of a standard development effort recently kicked off by the IEEE, sponsored by Stationary Batteries Committee of th

Re: VSWR FROM ATTACHED DATA

I read in !emc-pstc that Price, Ed wrote (in ) about 'VSWR FROM ATTACHED DATA' on Tue, 29 Oct 2002: >Ohms (output port shorted or open). Now, I'll assume that the driving RF >generator had a source impedance of 50 Ohms. > >First, you can find the reflection coefficient, r, from: > >r = [(Zl - Zo)

Re: Value of Using Non-NRTL Engineering Firms?

Hi Chris: OSHA rules apply to employers. OSHA electrical rules require employers (1) to use only electrical products that have been certified by an NRTL, or (2) in the case of custom products, to test the product in place. If you sell a non-NRTL-certified "custom" product to an employer

RE: A call for help &/or recommendation/s

Hello Naftali, You might be able to find this type of outdoor transformer under the category of 'Swimming pool and spa transformers'. The primary rating is 120 volts and the maximum secondary ratings are 15 volts RMS and 1 KVA. The transformers are provided with integral overcurrent protect

Re: RTCA document vs. IEC 60601-1-02

I presented a long paper related to this subject about field-to-wire coupling in the commercial and military arenas, which really translates into building vs. vehicle installation, which in turn means electrically how close and how well-defined is the ground plane. Here is the reference: "On Fi

RE: Standards for LED Color/Wavelength

Hi Don, This may help. <> Mark Schmidt Regulatory Compliance X-Rite Incorporated Grandville, MI USA (616) 257 2469 mschm...@xrite.com -Original Message- From: don_macart...@selinc.com [mailto:don_macart...@selinc.com] Sent: Tuesday, October 29, 2002 10:30 AM To: emc-p...

Re: Latest issue dates and MOV's

I read in !emc-pstc that lfresea...@aol.com wrote (in ) about 'Latest issue dates and MOV's' on Tue, 29 Oct 2002: >can anyone tell me where to find the latest issue dates for EN >61000-4-2/3/4/5/6/8/11? http://www.cenelec.org and follow links. -- Regards, John Woodgate, OOO - Own Opinio

RE: Latest issue dates and MOV's

You can find these dates on the CENELC web site. http://www.cenelec.org/ Look under "Standardization Issues" and search for the standard. Click on the links to bring up the details which include all of the relevant dates. Richard Woods Sensormatic Electronics Tyco

RE: RFI/EMI requirements for the automotive industry

Hi Paul, Take a look at ISO 7637-1 for 12V systems and -2 for 24V vehicles. Jim -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Denomme, Paul S. Sent: Tuesday, October 29, 2002 9:16 AM To: 'emc-p...@majordomo.ieee.org' Su

A call for help &/or recommendation/s

List members, For one of our applications, we have a need for an off-the-shelf an AC transformer (input: 120 Volts, 60 Hz, NEMA 5-15 plug, may consider NEMA 1-15. Output: 6 - 30 Volts, screw-on terminals, may consider flying leads) that can operate over industrial temperature ranges (-40 to +85 C

Re: RFI/EMI requirements for the automotive industry

I believe your customer is referring to SAE-J551. -- >From: "Denomme, Paul S." >To: "'emc-p...@majordomo.ieee.org'" >Subject: RFI/EMI requirements for the automotive industry >Date: Tue, Oct 29, 2002, 8:15 AM > > > Hi All, > > Can someone please inform me of the standards RFI/EMI stan

RE: VSWR FROM ATTACHED DATA

>-Original Message- >From: Gordon,Ian [mailto:ian.gor...@edwards.boc.com] >Sent: Tuesday, October 29, 2002 3:25 AM >To: 'IEEE EMC & SAFETY PSTC' >Subject: VSWR FROM ATTACHED DATA > > >People >You may remember that you helped me a few weeks ago with VRC/VSWR >assessments. >As part of the

RE: RTCA document vs. IEC 60601-1-02

Thanks Ken, Yes, 25 dBuV/m not 25 uV/m. I also found the test set up rather strange. Certainly not consistent with CISPR but then the aircraft environment is entirely different than most other equipment installations. I agree, this makes it hard to compare to CISPR testing. We may have over s

What's the latest with Ni-Cad Batteries?

Greetings all, One of our Engineering Teams wants to use a NiCad battery pack in an upcoming product (laboratory instrument). I'm suppose to become an expert on Worldwide Environmental Impact of NiCad batteries in 24 hours so I can give a report in a meeting (haven't we all been there before?).

Standards for LED Color/Wavelength

I am on a search for a standard or standards which describe LED Color versus Wavelength (i.e. X color Red = X wavelength). Does anyone know of any standards that describe LED Color versus Wavelength or where I should look? Thanks, Don MacArthur --- Thi

RE: RFI/EMI requirements for the automotive industry

>-Original Message- >From: Denomme, Paul S. [mailto:paul.deno...@viasystems.com] >Sent: Tuesday, October 29, 2002 6:16 AM >To: 'emc-p...@majordomo.ieee.org' >Subject: RFI/EMI requirements for the automotive industry > > > >Hi All, > > Can someone please inform me of the standards R

Re: RTCA document vs. IEC 60601-1-02

I think you mean 25 dBuV/m, but regardless of the number, it is not a direct comparison to CISPR because a) the DO-160 EUT-antenna separation is 1 meter, not 3 or 10 meters, and b) the test is performed without an antenna height search, and c) the EUT is fastened to a metallic ground plane, and

Which Directive for Radars?

G'Day! I've been looking at EU Directives for transmitters for the first time, and have got confused. Some questions: Q1) -- For radio transmitting equipment, as covered by Article 10(5) of the EMC Directive, there is a need for an EC-type examination certificate by a notified body. However, the

Latest issue dates and MOV's

Hi all, can anyone tell me where to find the latest issue dates for EN 61000-4-2/3/4/5/6/8/11? Also, any good source for MOV's that can operate in a 125 degrees C environment? Thanks, Derek N. Walton Owner, L. F. Research EMC Design and Test Facility 12790 Route 76, Poplar Grove, IL 61065 www

RFI/EMI requirements for the automotive industry

Hi All, Can someone please inform me of the standards RFI/EMI standards that are required in the automitive industry. This would be for a microprocessor controlled item that is part of the vehicle. My customer stated that EMI/RFI specifications are "Standard Automotive". What I am tryi

RE: Layered Reinforced Insulation

Richard, >From UL's database, the CL3P cable is a "Power Limited Cable" - Indicates cable intended for use in Class 2 or Class 3 circuits within buildings in ducts or plenums or other spaces used for environmental air in accordance with Section 725.61(A) of the NEC. This cable exhibits a maximum

RE: Layered Reinforced Insulation

I too have had some struggles with this concept. I now tend to think of "Basic", "Reinforced" and "Double" more in terms of an insulation strength as opposed to an actual material. For instance, "Double" insulation can be provided by a properly set and maintained distance through air, i.e no

RE: RTCA document vs. IEC 60601-1-02

I'm not sure if DO-199 or 233 has EMC requirements but I am very interested if you come with any. IEC 62A/MT 23 is in the process of amending 60601-1-2 for medical equipment used in the aircraft environment. We have based our requirements on the environment specified in DO-160. In general, the

VSWR FROM ATTACHED DATA

People You may remember that you helped me a few weeks ago with VRC/VSWR assessments. As part of the same work I am attempting to assign a VRC/VSWR for a coupling de-coupling device (CDN) but have not been able to get a typical value from the manufacturer of the device. However, I have been sent t

Re: Battery compartment ventilation rates.

Garry, When I did a similar test some time ago, also with helium, I used a non- electrochemical oxygen sensor (details on request) to monitor the amount of air that had re-entered the battery enclosure rather than the helium left. The setup worked well if I remember correctly. Best regards Ia

Battery compartment ventilation rates.

Just back from vacation (damn it) and need to look into measuring the hydrogen ventilation capability of a battery compartment. Seems pretty straightforward, and Helium can be used in place of hydrogen. Anybody have a source for sensors. I'm kind of hoping I can find something that woul