Re: SI Unit for volume
Bob: When you go for SI then please stay with the convention, i.e. kilowatt is abbreviated as kW and not KW. We are hopefully beyond the time when MAmp was supposed to mean milliampere. Regards, Bogdan. Robert Wilson wrote: Sorry, you're right. I had meant mW/cc, not W/cc. Until recently Ferroxcube and others had listed their ferrite's hysteresis losses (as a function of frequency and flux density) in terms of mW/cc. Then suddenly their new datasheets changed to KW/m^3. My first reaction was that they must be crazy to apply these enormous units to a ferrite core, a dozen of which would fit in the palm of one's hand! But it quickly became obvious that these units were actually the same as the old mW/cc. Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: TM66 [mailto:t...@rcn.com] Sent: June 21, 2002 11:12 AM To: Robert Wilson Subject: Re: SI Unit for volume Bob, W/cc is multiple of KW/m^3. 1 KW = 1,000 W and 1 m^3 = 1,000,000 cc therefore: 1 KW/m^3 = 1,000 W/1,000,000 cc = 0.001 W/cc or 1 W/cc = 1,000 KW/m^3 Robert Wilson wrote: ... For example, in the latest Ferroxcube ferrite core catalogue, specific values of core hysteresis losses are given in KW per m^3 of ferrite material, even though these are the same units as W/cc. ... Regards, Mirko Matejic --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: SI Unit for volume
On Fri, 21 Jun 2002 12:33:04 -0500, Ken Javor ken.ja...@emccompliance.com wrote: I would agree with the discussion below from a practical standpoint, but the original question referred to SI (International System) units so the answer is and must be cubic meters. SI is based on MKSA - meter-kilogram-second-Amperes and the only multipliers dividers allowed are every three orders of magnitude. Millimeters are blessed, centimeters are heresy. Therefore liters are proscribed. A liter is 1000 cubic centimeters. AFAIK, The International System of Units published from BIPM permits multipliers such as d, c, etc., too. The document also contains list of non-SI conventional units which can be used, and liter (1 l = 1 L = 1 dm^3 = 10^-6 m^3) is included in the list. So, I think: - SI units for volume are m^3, cm^3, mm^3, etc. - liter (l or L) is not a SI unit, but not prohibitted in the SI system still now Regards, Tom -- Tomonori Sato vef00...@nifty.ne.jp URL: http://member.nifty.ne.jp/tsato/ --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: SI Unit for volume
ANSI?? This is the same organization that has reinvented the well-proven ISO-metric fastener standard and in the process, came up with the M6.3 screw. What is a 6.3mm screw you ask? Why it's ΒΌ of course! Another gem of their wisdom is they reinvented the traditional flat topped DIN 85 screw head (the best design of a slotted screw head ever made), and came up with a new improved slotted screw head (ANSI IFI-513) that has rounded edges and as a result causes a screwdriver blade to easily torque out of the slot when tightening. One wonders if they have gotten to reinventing the wheel yet. Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: Chuck Mullett [mailto:chuck.mull...@onsemi.com] Sent: June 21, 2002 9:15 AM To: richwo...@tycoint.com Cc: emc-p...@majordomo.ieee.org Subject: Re: SI Unit for volume Yep, cubic meters, of course. Don't forget to separate the value from the unit: 15 m3. Folks often omit the space between the 5 and the m. ANSI will punish! Chuck Mullett richwo...@tycoint.com wrote: Nevermind. I found the answer to be cubic meters. -Original Message- From: WOODS, RICHARD Sent: Friday, June 21, 2002 8:28 AM To: 'emc-pstc' Subject: SI Unit for volume When stating a cubic volume in SI units, is liters the correct unit. If not, what is the correct method of expression? Richard Woods Sensormatic Electronics Tyco International --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: SI Unit for volume
I agree the gallons per minute rating for air compressors seems odd, but when one looks at adverts in the USA for compressors with storage tanks, the tanks themselves are sizes in gallons (30 Gal, 50 Gal. etc..). If the compressor flow is sized in gallons per minute, then the customer gets some idea of the rate of replenishment of the storage tank. This of course is all completely confounded by the fact that air is compressible and contains moisture - and a gallon (or cubic foot, cubic meter, etc..) at one pressure/temperature/moisture combination isn't the same mass as when at a different combination. Hence the introduction of the terms ACFM and SCFM (Actual and Standard Cubic Feet Per Minute) where the mass flow rates are represented at a specific set of conditions. It is a bit confusing, no matter what system of units you use (though I do find calculations in SI much simpler than US Customary). This link is a good one. http://www.cleandryair.com/scfm_vs__icfm_vs__acfm.htm Regards, Andrew Veit Systems Design Engineer MTS Systems Corp Ph: 919.677.2507 Fax: 919.677.2480 1001 Sheldon Drive Cary, NC 27513 -Original Message- From: Robert Wilson [mailto:robert_wil...@tirsys.com] Sent: Friday, June 21, 2002 12:27 PM To: richwo...@tycoint.com; emc-p...@majordomo.ieee.org Subject: RE: SI Unit for volume Only if it applies to fluid volume. If it applies to volume of a solid, then it is traditional to use cubic centimeters, or even m^3. The latter is a heck of a big volume, and sounds almost silly, but it is increasingly used. For example, in the latest Ferroxcube ferrite core catalogue, specific values of core hysteresis losses are given in KW per m^3 of ferrite material, even though these are the same units as W/cc. Liters are never mentioned or ever used in this context. Context seems to be important, so the units used should make sense when considering what the units apply to. A non-metric example of something that makes no sense is how American companies are now rating air compressors in gallons per minute. This is really absurd since all tools that are powered by compressed air sold in the US are rated in CFM, the gallons/minute rating is useless. Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: June 21, 2002 5:28 AM To: emc-p...@majordomo.ieee.org Subject: SI Unit for volume When stating a cubic volume in SI units, is liters the correct unit. If not, what is the correct method of expression? Richard Woods Sensormatic Electronics Tyco International --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: SI Unit for volume
Sorry, you're right. I had meant mW/cc, not W/cc. Until recently Ferroxcube and others had listed their ferrite's hysteresis losses (as a function of frequency and flux density) in terms of mW/cc. Then suddenly their new datasheets changed to KW/m^3. My first reaction was that they must be crazy to apply these enormous units to a ferrite core, a dozen of which would fit in the palm of one's hand! But it quickly became obvious that these units were actually the same as the old mW/cc. Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: TM66 [mailto:t...@rcn.com] Sent: June 21, 2002 11:12 AM To: Robert Wilson Subject: Re: SI Unit for volume Bob, W/cc is multiple of KW/m^3. 1 KW = 1,000 W and 1 m^3 = 1,000,000 cc therefore: 1 KW/m^3 = 1,000 W/1,000,000 cc = 0.001 W/cc or 1 W/cc = 1,000 KW/m^3 Robert Wilson wrote: ... For example, in the latest Ferroxcube ferrite core catalogue, specific values of core hysteresis losses are given in KW per m^3 of ferrite material, even though these are the same units as W/cc. ... Regards, Mirko Matejic --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: SI Unit for volume
Only if it applies to fluid volume. If it applies to volume of a solid, then it is traditional to use cubic centimeters, or even m^3. The latter is a heck of a big volume, and sounds almost silly, but it is increasingly used. For example, in the latest Ferroxcube ferrite core catalogue, specific values of core hysteresis losses are given in KW per m^3 of ferrite material, even though these are the same units as W/cc. Liters are never mentioned or ever used in this context. Context seems to be important, so the units used should make sense when considering what the units apply to. A non-metric example of something that makes no sense is how American companies are now rating air compressors in gallons per minute. This is really absurd since all tools that are powered by compressed air sold in the US are rated in CFM, the gallons/minute rating is useless. Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: June 21, 2002 5:28 AM To: emc-p...@majordomo.ieee.org Subject: SI Unit for volume When stating a cubic volume in SI units, is liters the correct unit. If not, what is the correct method of expression? Richard Woods Sensormatic Electronics Tyco International --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: SI Unit for volume
Yep, cubic meters, of course. Don't forget to separate the value from the unit: 15 m3. Folks often omit the space between the 5 and the m. ANSI will punish! Chuck Mullett richwo...@tycoint.com wrote: Nevermind. I found the answer to be cubic meters. -Original Message- From: WOODS, RICHARD Sent: Friday, June 21, 2002 8:28 AM To: 'emc-pstc' Subject: SI Unit for volume When stating a cubic volume in SI units, is liters the correct unit. If not, what is the correct method of expression? Richard Woods Sensormatic Electronics Tyco International --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: SI Unit for volume
I believe the SI unit for volume is the cubic metre. A litre is 1/1000 of a cubic metre and not strictly speaking an SI unit. I wouldn't try asking for one thousandth of a cubic metre of engine oil at a service station though Chris Colgan Compliance Engineer TAG McLaren Audio Ltd The Summit, Latham Road Huntingdon, Cambs, PE29 6ZU *Tel: +44 (0)1480 415 627 *Fax: +44 (0)1480 52159 * Mailto:chris.col...@tagmclaren.com * http://www.tagmclaren.com -Original Message- From: richwo...@tycoint.com [SMTP:richwo...@tycoint.com] Sent: Friday, June 21, 2002 1:28 PM To: emc-p...@majordomo.ieee.org Subject: SI Unit for volume When stating a cubic volume in SI units, is liters the correct unit. If not, what is the correct method of expression? Richard Woods Sensormatic Electronics Tyco International --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list ** Please visit us at www.tagmclaren.com ** The contents of this E-mail are confidential and for the exclusive use of the intended recipient. If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. Important Note: Any typographical, clerical or other error in this communication is subject to correction without any liability on the part of TAG McLaren Audio Limited. Any orders placed shall be subject to acceptance by TAG McLaren Audio Limited on its standard terms and conditions of sale which shall govern the contract for the sale and purchase of the products ordered to the exclusion of any other terms and conditions. TAG McLaren Audio Ltd The Summit, 11 Latham Road Huntingdon, Cambs, PE29 6ZU Telephone : 01480 415600 (+44 1480 415600) Facsimile : 01480 52159 (+44 1480 52159) ** Please visit us at www.tagmclaren.com ** --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: SI Unit for volume
Answer is presumably in ISO 1000, specification for SI units and recommendations for the use of their multiples and of certain other units. Regards, John Crabb, Development Excellence (Product Safety) , NCR Financial Solutions Group Ltd., Discovery Centre, 3 Fulton Road, Dundee, Scotland, DD2 4SW E-Mail :john.cr...@scotland.ncr.com Tel: +44 (0)1382-592289 (direct ). Fax +44 (0)1382-622243. From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: 21 June 2002 13:33 To: emc-p...@majordomo.ieee.org Subject: RE: SI Unit for volume Nevermind. I found the answer to be cubic meters. -Original Message- From: WOODS, RICHARD Sent: Friday, June 21, 2002 8:28 AM To: 'emc-pstc' Subject: SI Unit for volume When stating a cubic volume in SI units, is liters the correct unit. If not, what is the correct method of expression? Richard Woods Sensormatic Electronics Tyco International --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: SI Unit for volume
Nevermind. I found the answer to be cubic meters. -Original Message- From: WOODS, RICHARD Sent: Friday, June 21, 2002 8:28 AM To: 'emc-pstc' Subject: SI Unit for volume When stating a cubic volume in SI units, is liters the correct unit. If not, what is the correct method of expression? Richard Woods Sensormatic Electronics Tyco International --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
