Image by Horia Varlan via FlickrPlease visit the Compatible Electronics European Conformity Assessment page to get a copy; http://www.celectronics.com/europe.htm
Friday, June 4, 2010
Corrigendum issued to the March list of EMC Harmonised Standards
Image by Horia Varlan via FlickrPlease visit the Compatible Electronics European Conformity Assessment page to get a copy; http://www.celectronics.com/europe.htm
Wednesday, March 24, 2010
Harmonized Standards List Updated 3/2010 – EMCD & LVD
New lists of harmonized standards for the EMC Directive and the Low Voltage Directive have been published in the Official Journal of the European Union.
Of note, this revision now includes inline explanatory comments. Brief explanations have been added to certain line items, line items that could prove to be confusing without them, an example of one is for EN 55022, which reads;
By the way, for those of you reading this on the West side of the "Pond", the date in the above quote is October 1st, 2011 and not January 10th, 2011.
Copies of the new lists can be found in the European Conformity Assessment section of the Compatible Electronics, Inc. conformity assessment web page.
Of note, this revision now includes inline explanatory comments. Brief explanations have been added to certain line items, line items that could prove to be confusing without them, an example of one is for EN 55022, which reads;
" Each of the four following standards provide presumption of conformity until 1.10.2011: EN 55022:1998, EN 55022:1998 + A1:2000, EN 55022:1998 + A2:2003, EN 55022:1998 + A1:2000 + A2:2003"It's refreshing to see that these clarifications are being added. This will hopefully make interpreting which harmonized standards are applicable much easier, for the average compliance engineer. Although, nothing is ever perfect and one should contact an expert if in doubt.
By the way, for those of you reading this on the West side of the "Pond", the date in the above quote is October 1st, 2011 and not January 10th, 2011.
Copies of the new lists can be found in the European Conformity Assessment section of the Compatible Electronics, Inc. conformity assessment web page.
Wednesday, March 10, 2010
List of ETSI 301 489 EMC standards applicable under article III 1.(b) of 1999/5/EC ( R&TTE Directive ).
This is a flat list of the ETSI 301 489 series test standards. For more information on any of these, visit http://pda.etsi.org/pda/queryform.asp for a direct search on the ETSI site. This list and other R&TTE related material is available on the Compatible Electronics European Conformity Assessment page.
| ETSI EN 301 489-1 | Common Technical requirements |
| ETSI EN 301 489-2 | Specific conditions for radio paging equipment |
| ETSI EN 301 489-3 | Specific conditions for Short-Range Devices (SRD) operating on frequencies between 9 kHz and 40 GHz |
| ETSI EN 301 489-4 | Specific conditions for fixed radio links, Broadband Data Transmission System Base stations, ancillary equipment and services |
| ETSI EN 301 489-5 | Specific conditions for Private land Mobile Radio (PMR) and ancillary equipment (speech and non-speech) |
| ETSI EN 301 489-6 | Specific conditions for Digital Enhanced Cordless Telecommunications (DECT) equipment |
| ETSI EN 301 489-7 | Specific conditions for mobile and portable radio and ancillary equipment of digital cellular radio telecommunications systems (GSM and DCS) |
| ETSI EN 301 489-8 | Specific conditions for GSM base stations |
| ETSI EN 301 489-9 | Specific conditions for wireless microphones, similar Radio Frequency (RF) audio link equipment, cordless audio and in-ear monitoring devices |
| ETSI EN 301 489-10 | Specific conditions for First (CT1 and CT1+) and Second Generation Cordless Telephone (CT2) equipment |
| ETSI EN 301 489-11 | Specific conditions for terrestrial sound broadcasting service transmitters |
| ETSI EN 301 489-12 | Specific conditions for Very Small Aperture Terminal, Satellite Interactive Earth Stations operated in the frequency ranges between 4 GHz and 30 GHz in the Fixed Satellite Service (FSS) |
| ETSI EN 301 489-13 | Specific conditions for Citizens' Band (CB) radio and ancillary equipment (speech and non-speech) |
| ETSI EN 301 489-14 | Specific conditions for analogue and digital terrestrial TV broadcasting service transmitters |
| ETSI EN 301 489-15 | Specific conditions for commercially available amateur radio equipment |
| ETSI EN 301 489-16 | Specific conditions for analogue cellular radio communications equipment, mobile and portable |
| ETSI EN 301 489-17 | Specific conditions for Broadband Data Transmission Systems |
| ETSI EN 301 489-18 | Specific conditions for Terrestrial Trunked Radio (TETRA) equipment |
| ETSI EN 301 489-19 | Specific conditions for Receive Only Mobile Earth Stations (ROMES) operating in the 1,5 GHz band providing data communications |
| ETSI EN 301 489-20 | Specific conditions for Mobile Earth Stations (MES) used in the Mobile Satellite Services (MSS) |
| ETSI EN 301 489-22 | Specific conditions for ground based VHF aeronautical mobile and fixed radio equipment |
| ETSI EN 301 489-23 | Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) Base Station (BS) radio, repeater and ancillary equipment |
| ETSI EN 301 489-24 | Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) for Mobile and portable (UE) radio and ancillary equipment |
| ETSI EN 301 489-25 | Specific conditions for CDMA 1x spread spectrum Mobile Stations and ancillary equipment |
| ETSI EN 301 489-26 | Specific conditions for CDMA 1x spread spectrum Base Stations, repeaters and ancillary equipment |
| ETSI EN 301 489-27 | Specific conditions for Ultra Low Power Active Medical Implants (ULP-AMI) and related peripheral devices (ULP-AMI-P) |
| ETSI EN 301 489-28 | Specific conditions for wireless digital video links |
| ETSI EN 301 489-29 | Specific conditions for Medical Data Service Devices (MEDS) operating in the 401 MHz to 402 MHz and 405 MHz to 406 MHz bands |
| ETSI EN 301 489-31 | Specific conditions for equipment in the 9 kHz to 315 kHz band for Ultra Low Power Active Medical Implants (ULP-AMI) and related peripheral devices (ULP-AMI-P) |
| ETSI EN 301 489-32 | Specific conditions for Ground and Wall Probing Radar applications |
| ETSI EN 301 489-33 | Specific conditions for Ultra Wide Band (UWB) communications devices |
Thursday, March 4, 2010
IECEE Battery Ruling
An issue was brought to the attention of the IECEE regarding CB Certificates for products containing secondary cells (Lithium Ion Battery cells) that are certified to UL 1642 as well as Secondary Battery Packs certified to UL 2054.
These UL standards are not harmonized with the IEC 62133 – “Secondary Cells And Batteries Containing Alkaline Or Other Non- Acid Electrolytes - Safety Requirements For Portable Sealed Secondary Cells, And For Batteries Made From Them, For Use In Portable Applications.”
After deliberation the IECEE issued a ruling indication that a CB Certificate could not be issued for products containing secondary cells that were not in compliance with IEC 62133. However as most secondary cells are currently certified only to UL standards, a phase in period was established.
At the time of this writing, the phase in time table is as follows;
Currently
UL has indicated that they will start the process to harmonize there requirements with IEC 62133.
These UL standards are not harmonized with the IEC 62133 – “Secondary Cells And Batteries Containing Alkaline Or Other Non- Acid Electrolytes - Safety Requirements For Portable Sealed Secondary Cells, And For Batteries Made From Them, For Use In Portable Applications.”
After deliberation the IECEE issued a ruling indication that a CB Certificate could not be issued for products containing secondary cells that were not in compliance with IEC 62133. However as most secondary cells are currently certified only to UL standards, a phase in period was established.
At the time of this writing, the phase in time table is as follows;
Currently
- CB Certificates can stand as issued. Note that CB Certificates need to be renewed every 3 years.
- CB Certificates can continue to be issued using the UL standards for secondary cell certification.
- CB Certificates can be issued using the UL standards for secondary cell certification, if additional testing is conducted on the secondary cells to show compliance to IEC 62133.
- Secondary cells must have a CB Certificate showing compliance with IEC 62133 to be accepted in an end product evaluation for CB Certification.
UL has indicated that they will start the process to harmonize there requirements with IEC 62133.
What does this mean to you and me?Article by Ercell Bryant, please visit Compatible Electronics on the web.
The real effect on most of us is that we will need to move to have our battery suppliers get third party certification on the secondary cells we are using. Otherwise we cannot self certify to the Harmonized EN Standard (EN60950-1, EN61010-1, EN60335-1, EN60065, EN60204-1, etc.) and it will become increasingly difficult to get our products NRTL Listed.
Thursday, February 25, 2010
is EMI to blame for recent Toyota problems?
News outlets and internet blogs abound this week with stories speculating that the problems with some reported out of control vehicles may be related to EMI.
Anyone involved with Electromagnetic Compatibility will recognize that given the proliferation of technology in today’s automobiles, the conditions do exist for catastrophic failure of sensitive systems, and the potential is high for injury or death if such systems fail.
In traditional “analog” systems, these failures would tend to manifest in the form of glitches, or other minor system anomalies. Problems have been reported in the past with CB radio systems causing the electronic fuel injection to fail, causing the car to stall. More recently, and as systems are becoming more advanced, problems have been reported that cell phone calls have interfered with sensors causing the inadvertent operation of breaking systems.
In some of today’s vehicles however, with technology so advanced and systems so integrated into every aspect of the vehicles operation, it is virtually complete “fly-by-wire”. One can imagine the potential for disaster. Several groups exist that contain engineers devoted to such “imagination”, such as the SAE International, the IEEE and the ISO/IEC to name a few. Today, all major automakers have internal production controls and standards focused on Electromagnetic Compatibility, and most have been testing vehicles and systems for a couple of decades.
With many consumer electronic devices finding their way into the automobile, as well as cell phones and wireless headsets, the potential for interference is ever increasing. Automakers will need to address an ever changing EM environment.
With cost cutting measures driving the market, component suppliers are faced with tough decisions as to the extent of testing for product off the assembly. EMC testing is expensive, and testing everything that rolls off the line is impracticable. Some find, that one sample tested, is suitable to represent hundreds of thousands of units. Others may find that outsourcing testing can save thousands of dollars, but the tradeoff here is that these labs may not operate under the same tight controls as local accredited test labs, so the uncertainty in the results may be too high.
It is in fact not possible to know if EMI is the cause of a particular incident without extensive research and testing, it would seem that the phenomenon would be on the short list of suspects for now, however.
Thursday, February 4, 2010
Antenna Calibration Procedure
The office of Engineering and Technology, Laboratory Division, released a public draft review regarding proper antenna calibration procedure.
The document answers the question;
Antenna factors collected in this manner can then be used for vertical or horizontal measurements at distances of 3 meters or more.
OET DRAFT FOR REVIEW
The document answers the question;
“What procedure should be used to calibrate antennas used to make radiated emission measurements and normalized site attenuation (NSA) measurements”?According to the public draft review, the revised ANSI standard, ANSI C63.5-2006 provides the proper procedure and is based on a horizontally polarized measurement performed on a standard antenna calibration site at a 10 meter distance.
Antenna factors collected in this manner can then be used for vertical or horizontal measurements at distances of 3 meters or more.
OET DRAFT FOR REVIEW
Monday, February 1, 2010
Company fined $10k for impacting weather radar near San Juan airport
Terminal Doppler Weather Radar (TDWR) serving San Juan International Airport received interference adjacent to 5.61GHz, source tracked by FCC and FAA agents to radio transmitters providing wireless internet atop a nearby building.
The company responsible for the interference was issued a forfeiture order by the FCC enforcement bureau in the amount of $10,000. While the company used equipment that had been previously certified under the FCC rules for UNII operation, the equipment causing interference was operating on frequencies that it had not been approved for. Moreover, if the transmitters would be considered non-UNII devices and subject to section 15.407(2) of the FCC rules, then the power allowed would have been limited to ¼ Watt in that particular frequency band, however, the devices in question were designed to operating in excess of three times that level.
The full FCC forfeiture order can be found at http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-10-138A1.pdf.
The company responsible for the interference was issued a forfeiture order by the FCC enforcement bureau in the amount of $10,000. While the company used equipment that had been previously certified under the FCC rules for UNII operation, the equipment causing interference was operating on frequencies that it had not been approved for. Moreover, if the transmitters would be considered non-UNII devices and subject to section 15.407(2) of the FCC rules, then the power allowed would have been limited to ¼ Watt in that particular frequency band, however, the devices in question were designed to operating in excess of three times that level.
The full FCC forfeiture order can be found at http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-10-138A1.pdf.
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