RE: Metric
Tony,
It works reasonably well -- an electric clock designed for 50 Hz [i.e., a
metric-electric :-) ] run on a 60 Hz system [60/50=1.2000] measures in
micro-fortnights [14*24*60*60/1000000=1.2096] with just 0.8% error.
John
-----Original Message-----
From: Tony Jeffree [mailto:tony@jeffree.co.uk]
Sent: Friday, October 22, 1999 6:22 PM
To: Jim Carlo
Cc: IEEE802
Subject: Re: Metric
Jim -
I see that your note does not cover the metric-ization of time. I
understand thet the metric replacement for the second is the
micro-fortnight - is this correct? ;-)
Regards,
Tony
At 17:12 22/10/99 -0500, Jim Carlo wrote:
>
>Note policy below:
>
> METRIC POLICY: After 1 Jan 2000, proposed new standards and revised
>standards submitted for approval will use metric units exclusively in the
>normative portions of the standard. Authoritative and detailed guidance for
>use of the metric system is found in IEEE/ASTM Standard SI 10.
> There are three exceptions allowed in the policy statement: (1)
>products that are specified in non-metric trade sizes, such as the AWG wire
>series or inch-based fasteners; (2) cases, such as plugs and sockets, where
>a mechanical fit to an inch-based product is required; and (3) metric
>products need not be substituted for inch-based products.
> According to Bruce Barrow, Chair of the IEEE Standards Coordinating
>Committee 14 (Quantities, Units, and Letter Symbols), this stage will
>transition as easily as Stage I (include metric units in standards) and
>Stage II (metric units given preferred status).
> For assistance, contact Barrow at "MailTo:b.barrow@ieee.org".
>
>Jim Carlo(jcarlo@ti.com) Cellular:1-214-693-1776 Voice&Fax:1-214-853-5274
>TI Fellow, Networking Standards at Texas Instruments
>Chair, ISO/IEC JTC1/SC6 Telecom and Info Exchange Between Systems
>Chair, IEEE802 LAN/MAN Standards Committee
>