I was speaking for weather only for kPa. I do not exclude other multiples of 1 000 or 1 000 ths as I mentioned in another email. The ANMC Metric Practice Guide is a good guide for the public use.
Other industries? Automotive tire pressures, radiator pressures, pumps, tanks, etc. Stan Doore ----- Original Message ----- From: Gene Mechtly <[EMAIL PROTECTED]> To: G. Stanley Doore <[EMAIL PROTECTED]> Cc: U.S. Metric Association <[EMAIL PROTECTED]> Sent: Saturday, December 14, 2002 1:32 PM Subject: Prefix Choices > On Fri, 13 Dec 2002, G. Stanley Doore wrote: > > ... > > The NOAA National Weather Service won't even adhere to the SI derivative > > for pressure. For example, the NWS uses hPa rather than kPa for > > pressure. > > Stan, > > Both prefixes hecto and kilo are equally acceptable at the level of the > CGPM and the BIPM. > > It is only secondary groups that have not yet entirely agreed on > preferences for one prefix or another. > > By what convention do you claim that "the SI derivative for pressure" > must be kPa rather than hPa, and imply that other multiples, e.g. MPa, > etc. are not acceptable? > > > Canada uses kPa to be consistent with other industries in reporting > > atmospheric pressure.. > > What "other industries" do you have in mind, and how are their > preferences for prefixes demonstrated (by convention, or usage)? > > Gene. > >
