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Re: Error of % + digits?

From Cydrome Leader <presence@MUNGEpanix.com>
Newsgroups sci.electronics.equipment, sci.electronics.basics
Subject Re: Error of % + digits?
Date 2020-09-09 07:39 +0000
Organization PANIX Public Access Internet and UNIX, NYC
Message-ID <rja0re$98u$1@reader1.panix.com> (permalink)
References (14 earlier) <op.0no09q0awdg98l@glass> <reovmc$gs8$1@reader1.panix.com> <op.0nve3ltpwdg98l@glass> <rf5fgk$2h9$1@reader1.panix.com> <op.0ougj2jjwdg98l@glass>

Cross-posted to 2 groups.

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In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
> On Tue, 21 Jul 2020 02:13:56 +0100, Cydrome Leader <presence@mungepanix.com> wrote:
> 
>> In sci.electronics.basics Commander Kinsey <CFKinsey@military.org.jp> wrote:
>>> On Thu, 16 Jul 2020 08:30:20 +0100, Cydrome Leader <presence@mungepanix.com> wrote:
>>>
>>>> In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
>>>>> On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner <spamjunk@blueyonder.co.uk> wrote:
>>>>>
>>>>>> On 12/07/20 19:01, Pimpom wrote:
>>>>>>> On 7/12/2020 11:15 PM, Commander Kinsey wrote:
>>>>>>>> On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader <presence@mungepanix.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> In sci.electronics.equipment Pimpom <nobody@nowhere.com> wrote:
>>>>>>>
>>>>>>>>>> My mechanical slide caliper has a resolution of 0.001 inch. This
>>>>>>>>>> means that it can display measurements with a precision of 1 mil,
>>>>>>>>>
>>>>>>>>> What if your caliper had a resolution of 1 mil +/- 3 counts on the last
>>>>>>>>> digit?
>>>>>>> .....<snip>........
>>>>>>>>
>>>>>>>> In America, what is a "mill"?  In the UK, it used to mean a thousandth of an
>>>>>>>> inch, but people use it to mean a millimetre nowadays.
>>>>>>>>
>>>>>>>
>>>>>>> It's not a mill. It's mil - single l. It means, and has always meant, a
>>>>>>> thousandth of an inch. It's not an Americanism.
>>>>>>
>>>>>> In the UK "mill" means millilitre.
>>>>>>
>>>>>> If you want to refer to fractions of an inch, then
>>>>>> it is /always/ "thou", i.e. thousandths of an inch.
>>>>>>
>>>>>> In the UK "mil/mill" /never/ means 0.001".
>>>>>
>>>>> Yes it does.  My neighbour's a tradesman (in Scotland) and says
>>>>> "mill/mil" (I don't know which as they sound the same in speech) as
>>>>> shorthand for millimetre.  As in "that kitchen unit is 600 mill wide".
>>>>> Since we don't use inches for such things in the UK, there's no
>>>>> confusion.
>>>>
>>>> The context there is key too. While I'd not measure a countertop or
>>>> whatever in millimeters, it would make no sense that anything in a kitchen
>>>> would be measured thicknesses of paper.
>>>>
>>>> We (in the US) use "guage" for wire
>>>
>>> Isn't that really hard to work out?  We use cross sectional area in mm.  Which is really easy to imagine.  With the added bonus that a higher number is thicker.  It's also pretty handy as a rough guide that 1 square mm carries 10 amps.
>>
>> Not really. If you can only count with your fingers you probably aren't
>> building anything impressive to start with. The entire fallacy of "metric
>> is easy, base 10, duh" is just bullshit. Check dimensions of anything
>> designed by people that don't know what fractions are. There are tons of
>> weird numbers like 13.1mm and so forth. It's no different than 1-1/8th
>> inches.
> 
> Yes it ism because the number system works in 10s.  So if the 
> measurements do too, it's simpler to calculate, especially when you get 
> 1/2, 1/4, 1/8, 1/16, 1/32 inches.  What's 1/4 inch + 1/16?  And even 
> worse, how many feet in 197 inches?

Is this supposed to be some sort of "hard" challenge? answer 1 is 5/16". 
answer 2 is 16'5". No calculator, no pencil and paper and no real 
thinking even needed to solve these. Sorry metric slaves can't do basic 
match and can only slide commas around between digits.

>>>> and sheet metal.
>>>
>>> Seriously?  Wow.  Why would you not measure a thickness in a unit of 
>>> distance?
>>
>> The guage for sheet metal is sort of obnoxious. It will vary by type of
>> metal as well, if that makes any sense.
> 
> It's daft for wiring aswell.  I can immediately visualise what a 6mm^2 
> cross section of wire is like, and know how much current it will take.

Wow, you're so smart. You think we can't visualize 18 or 6 guage wire and 
know how much current it can carry?

>>>> We also use "guage"
>>>> for measuring really thin stuff like plastic films. In the last case, it's
>>>> a completly different unit, but with proper context won't confuse anybody.
>>>
>>> We use microns.
>>
>> how many microns thick is your plastic trash bag?
> 
> Not enough.  They've now made them so thin that everybody ends up 
> tearing them or using two or three layers to stop stuff going through 
> them.  Fucking environmentalists.

I have to agree here on most bags.

>> The last ones I got were
>> speced on the box as "0.7 mil" There's no false sense of precision there,
> 
> Mil what?  Millimeters?  Thousands of an inch?
> 
>> like with the 610mm countertop or whatever it was.
> 
> What's wrong with bags in microns?  It's the correct unit of measurement, as it's thinner than a mm.  You wouldn't drive 17,000 yards, you'd state it in miles.
> 
>>>> Question for the metric woodworkers. Does anybody cut a piece of wood to
>>>> 317mm or 429mm or other off numbers when building a house or handing a
>>>> door or installing a countertop?
>>>
>>> Depends if something else is in the way.  I'd always try to use round 
>>> numbers.
>>
>> Would round be 320mm and 430mm instead of 317 and 429? Do you split in 5mm
>> increments too? I'm really curious about this.
> 
> Not sure what you're asking here.  If I'm designing something, I'll use 
> round numbers.  I just built a parrot nestbox.  Funnily enough I cut the 
> wood to 30cm, not 25 or 28.

quick, what's 30cm + 3.5mm?

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Thread

Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-18 14:03 +0100
  Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-18 14:28 +0100
  Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-06-18 20:08 +0530
    Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-18 15:41 +0100
      Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-18 18:16 -0400
        Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-18 23:48 +0100
          Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-18 19:38 -0400
            Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-19 21:46 +0100
              Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-19 18:55 -0400
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-19 23:59 +0100
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-06-20 12:09 +0530
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-20 13:03 +0100
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-20 11:24 -0400
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-20 16:58 +0100
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-06-20 23:28 +0530
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-20 14:15 -0400
                Re: Error of % + digits? Tom Gardner <spamjunk@blueyonder.co.uk> - 2020-06-20 23:54 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-26 05:10 +0000
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-26 11:27 -0400
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-27 06:40 +0000
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-27 09:55 -0400
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-29 02:59 +0000
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-29 10:54 -0400
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-30 03:28 +0000
                Re: Error of % + digits? Jeroen Belleman <jeroen@nospam.please> - 2020-06-20 20:18 +0200
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-24 18:37 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-26 04:54 +0000
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-11 21:38 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-13 03:21 +0000
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-13 13:32 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-26 04:23 +0000
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-06-26 14:02 +0530
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-27 06:56 +0000
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-12 18:45 +0100
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-07-12 23:31 +0530
                Re: Error of % + digits? Tom Gardner <spamjunk@blueyonder.co.uk> - 2020-07-12 20:21 +0100
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-07-13 10:23 +0530
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-13 13:36 +0100
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-07-13 20:57 +0530
                Re: Error of % + digits? Jeroen Belleman <jeroen@nospam.please> - 2020-07-13 17:39 +0200
                Re: Error of % + digits? Tom Gardner <spamjunk@blueyonder.co.uk> - 2020-07-13 21:04 +0100
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-20 21:35 +0100
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-20 21:36 +0100
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-07-21 12:05 +0530
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-31 23:53 +0100
                Re: Error of % + digits? Pimpom <nobody@nowhere.com> - 2020-08-01 14:31 +0530
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-13 13:35 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-16 07:30 +0000
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-17 00:19 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-21 01:13 +0000
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-08-04 22:27 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-09-09 07:39 +0000
                Re: Error of % + digits? Jasen Betts <jasen@xnet.co.nz> - 2020-07-17 12:15 +0000
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-28 19:02 +0100
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-13 13:38 +0100
      Re: Error of % + digits? Rich <rich@example.invalid> - 2020-06-24 20:06 +0000
        Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-06-30 00:41 +0100
          Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-06-30 03:52 +0000
            Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-06-30 11:09 -0400
              Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-02 05:45 +0000
                Re: Error of % + digits? Jasen Betts <jasen@xnet.co.nz> - 2020-07-02 07:03 +0000
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-02 10:41 -0400
                Re: Error of % + digits? RheillyPhoull <Rheilly@bigslong.com> - 2020-07-03 09:20 +0800
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-16 20:09 +0100
                Re: Separate amps jacks on multimeters Rich <rich@example.invalid> - 2020-07-17 14:02 +0000
                Re: Separate amps jacks on multimeters "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-17 19:16 +0100
                Re: Separate amps jacks on multimeters Rich <rich@example.invalid> - 2020-07-17 20:26 +0000
                Re: Separate amps jacks on multimeters "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-17 21:44 +0100
                Re: Separate amps jacks on multimeters Rich <rich@example.invalid> - 2020-07-17 22:37 +0000
                Re: Separate amps jacks on multimeters "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-18 00:11 +0100
                Re: Separate amps jacks on multimeters Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-17 18:07 -0400
                Re: Separate amps jacks on multimeters "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-17 23:31 +0100
                Re: Separate amps jacks on multimeters Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-17 19:10 -0400
                Re: Separate amps jacks on multimeters "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-18 00:18 +0100
                Re: Separate amps jacks on multimeters Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-17 19:30 -0400
                Re: Separate amps jacks on multimeters "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-28 22:16 +0100
                Re: Separate amps jacks on multimeters Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-22 04:24 +0000
                Re: Separate amps jacks on multimeters Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-22 12:28 -0400
                Re: Separate amps jacks on multimeters Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-17 19:25 -0400
                Re: Separate amps jacks on multimeters Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-22 04:20 +0000
                Re: Separate amps jacks on multimeters Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-22 12:23 -0400
                Re: Error of % + digits? Jasen Betts <jasen@xnet.co.nz> - 2020-07-03 13:10 +0000
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-03 10:14 -0400
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-16 20:10 +0100
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-16 16:03 -0400
                Re: Error of % + digits? Michael Terrell <terrell.michael.a@gmail.com> - 2020-07-16 13:13 -0700
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-17 00:02 +0100
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-16 23:29 -0400
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-24 22:09 +0100
                Re: Error of % + digits? Rich <rich@example.invalid> - 2020-07-24 22:58 +0000
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-25 00:31 +0100
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-17 00:01 +0100
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-16 18:51 +0100
                Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-26 03:53 +0000
              Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-16 18:45 +0100
                Re: Error of % + digits? Ralph Mowery <rmowery28146@earthlink.net> - 2020-07-16 15:53 -0400
            Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-16 18:46 +0100
              Re: Error of % + digits? Michael Terrell <terrell.michael.a@gmail.com> - 2020-07-16 10:54 -0700
                Re: Error of % + digits? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-17 00:15 +0100
              Re: Error of % + digits? Cydrome Leader <presence@MUNGEpanix.com> - 2020-07-26 04:17 +0000
          Re: Error of % + digits? Rich <rich@example.invalid> - 2020-06-30 07:59 +0000
  Re: Error of % + digits? Dieter Michel <dmichel@prosound.de> - 2020-06-22 17:19 +0200
  Re: Error of % + digits? Rich <rich@example.invalid> - 2020-06-24 20:03 +0000

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