开云体育

Re: HP 8656B

Brian All Messages By This Member #90788 开云体育 Hello Dave, ? I think that avoiding use of mF is for the reason that a long time ago, ie, when I was young, a capacitor marked 8 mF was known to be 8 microFarad. The use of uF is a Johnny come lately, with the emergence of SI multipliers. Easy to write the Greek mu, but not so easy to type on the early QWERTY keyboards with early versions of word-processing software. So, rather than confuse older people, the multiplier m for capacitance is generally avoided. ? 73 de Brian, VK2GCE ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of Dr. David Kirkby from Kirkby Microwave Ltd Sent: Saturday, 25 August 2018 3:40 PM To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP 8656B ? On Fri, 24 Aug 2018, 06:38 Kuba Ober, <kuba@...> wrote: How big is that cap, size-wise? It’s unlikely to be a supercapacitor for such voltage in anything older than a few years or so, I’d bet. It’s a typo in the PL, and a common use of M for micro. Happens all the time. You’re looking at 24,000uF @ 40V.? ? It is strange why mF? are rarely used. We use mV, mA, m ohm, mH, mm, but when it comes to capacitors one uses? fF, pF, nF, uF and farads, but rarely mF.? ? A capacitor of 0.022? F is rarely called 22 mF, but usually 22,000 uF.? ? When I use my HP 4284A LCR meter, I have to stop and think when it shows a result in mF.? ? I can only guess at one time capacitors usually had values of less than 1000 uF, so people used uF, and never changed ? We don't tend to use Mm either. A distance would normally be quoted as 4000 km rather than 4 Mm.? ? Dave.?

View All 35 Messages

#90788

Join [email protected] to automatically receive all group messages.