<[email protected]>, Rich Nute <[email protected]>
inimitably wrote:
>I often wonder whether being able to measure a
>phenomenon means that we should therefore control
>that phenomenon. Phenomena such as flicker and EMC
>have been observable long before the advent of suitable
>measuring equipment. Clearly, in the absence of the
>ability to measure any phenomenon, we cannot control it.
>But, do we sometimes control it because we can measure
>it?
Yes, sometimes. Your description of how to measure dmax without using
the costly standard flicker-meter is mostly correct. A storage scope is
really the only practical way. You only have to be sure that dmx is less
than the limit value: you don't need to know very accurately what its
actual value is.
I described what the standard specifies. In practice, I tell people to
see whether the equipment produces a noticeable disturbance of the
brightness of a 60 W lamp on the same circuit. But the proposed new
('amended' - they retained the commas and put new words between them)
doesn't allow you to do that - you HAVE to use the flicker meter, which
means hiring a test-house that has one.
--
Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839
Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from
tallyhosis. PLEASE do not mail copies of newsgroup posts to me.
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