Re: Good Hardware Tools

From	Mat Nieuwenhoven <mnieuw@zap.a2000.nl>
Newsgroups	comp.arch.embedded
Subject	Re: Good Hardware Tools
Date	2021-01-03 11:03 +0000
Organization	Aioe.org NNTP Server
Message-ID	<rss8ak$1nil$1@gioia.aioe.org> (permalink)
References	(14 earlier) <2c2d5f1b-29f1-45c2-8d6c-01e962b86bd6n@googlegroups.com> <zavrhjmncnay.qkm2c51.pminews@nntp.aioe.org> <dd651bed-5904-4c47-b516-aa52a74783ecn@googlegroups.com> <zavrhjmncnay.qkxx1a0.pminews@nntp.aioe.org> <5d124236-5686-4adf-a16c-7524a7482e59n@googlegroups.com>

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On Sun, 06 Dec 2020 15:04:45 -0800, Rick C wrote:

> On Sunday, December 6, 2020 at 11:56:06 AM UTC-5, Mat Nieuwenhoven
> wrote:
>> On Mon, 30 Nov 2020 07:46:30 -0800 (PST), Rick C wrote:
>> 
>> <snip>
>> >You need to learn how to read specs. The first 1.5% applies to the
>> >full range I suspect and the total error is the sum of the two or the
>> >greater of the two.
>> No, it is 1.5% of the reading OR 1.5 C, whatever is greater. Incomplete
>> spec, because they don't say if it is for C or F (I suspect C as it is
>> an european device), Because it can do F and C, therefore in F 1.5% of
>> reading would be more accurate. Below 0 C is it less accurate, 3% or
>> degrees.
>> >Stop pretending these devices are accurate. Try measuring a dozen
>> >different locations in the fridge. You will get a dozen different
>> >readings with a ±1°C range. That's just the variation and does not set
>> >the accuracy.
>> Well, higher in the fridge is is somewhat warmer, as specified in the
>> user's manual. Different packages inside the fridge give different
>> readings (by several degrees), likeley due to differences in
>> emissivity.
>> 
>> I have started to measure the fridge's energy consumption today. While
>> running, the fridge takes 55 to 66 W (it really varies) , I wonder if
>> it has a multispeed compressor. Assuming 60 W average, then after some
>> days, I should be able to determine how much % of the time the fridge
>> is on.
> 
> I put my fridge on a timer to not run when the power is expensive, 3
> hrs, twice a day it is cut off.   I measure about 1 or 2 degree rise in
> temperature, but only by looking in small spaces.
> 
> Funny thing about emissivity, if you point your thermometer at a shiny
> box of frozen food or a shiny plastic bag the heat from the outside
> radiates inward and is reflected back into your thermometer, raising the
> reading significantly.   So if I just take every temperature I see in
> the freezer, after sitting with the door closed for three hours, I will
> find up to 10 degree variations which is pure BS.  It's the variation in
> emissivity and the room warmth reflecting back to the thermometer.  The
> low readings can't be false however unless the fridge were actually a
> heater keeping the food from freezing while in an arctic environment.
> 
> I turned my thermostat up in the fridge and also adjusted the flap away
> from the coldest setting.  I think the flap was virtually closed cutting
> off effective cooling from the fridge and causing the motor to run
> constantly.   I can see it now cycles and can even see the defrost cycle
> where it runs the heater and leaves the compressor off for a while.
> 
> The power variation is from temperature differences.  If the returning
> gas is warmer it takes more work to compress it.  That reminds me, I
> need to clean the coils.

Well, I've measured the fridge's energy use for 25 days. Extrapolated to 
a year it used 118 kWh, let's say 130 because in summer our kitchen is 
warmer.
It ran 38% of the time. If I take freezer and cooler volume together (330 
liter), then it comes out to 0.39 kWh per liter per year.

Mat Nieuwenhoven

Thread

Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-10-29 20:17 -0700
  Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-10-29 23:52 -0700
    Re: Good Hardware Tools Theo <theom+news@chiark.greenend.org.uk> - 2020-10-30 10:19 +0000
  Re: Good Hardware Tools Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-10-31 00:21 +0000
  Re: Good Hardware Tools Dave Nadler <drn@nadler.com> - 2020-10-30 17:56 -0700
    Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-10-30 20:40 -0700
  Re: Good Hardware Tools Philip Martel <pmartel@alum.mit.edu> - 2020-10-31 14:54 -0400
    Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-04 20:13 -0800
      Re: Good Hardware Tools kegs@provalid.com (Kent Dickey) - 2020-11-13 17:10 -0600
        Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-15 19:43 -0800
          Re: Good Hardware Tools Brett <ggtgp@yahoo.com> - 2020-11-16 19:31 +0000
            Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-17 01:50 -0800
              Re: Good Hardware Tools Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> - 2020-11-17 11:14 +0100
                Re: Good Hardware Tools Brett <ggtgp@yahoo.com> - 2020-11-18 04:14 +0000
              Re: Good Hardware Tools George Neuner <gneuner2@comcast.net> - 2020-11-17 12:05 -0500
                Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-17 10:06 -0800
                Re: Good Hardware Tools George Neuner <gneuner2@comcast.net> - 2020-11-17 16:02 -0500
                Re: Good Hardware Tools Jim Jackson <jj@franjam.org.uk> - 2020-11-17 22:28 +0000
                Re: Good Hardware Tools David Brown <david.brown@hesbynett.no> - 2020-11-18 11:11 +0100
                Re: Good Hardware Tools Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2020-11-18 12:40 +0200
                Re: Good Hardware Tools Niklas Holsti <niklas.holsti@tidorum.invalid> - 2020-11-18 14:51 +0200
                Re: Good Hardware Tools Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2020-11-18 21:46 +0100
                Re: Good Hardware Tools David Brown <david.brown@hesbynett.no> - 2020-11-18 22:29 +0100
                Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-18 12:45 -0800
                Re: Good Hardware Tools Tom Gardner <spamjunk@blueyonder.co.uk> - 2020-11-18 21:08 +0000
                Re: Good Hardware Tools Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2020-11-19 00:35 +0100
                Re: Good Hardware Tools Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2020-11-18 16:12 -0500
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-18 17:30 -0800
                Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-18 23:36 -0800
                Re: Good Hardware Tools Jim Jackson <jj@franjam.org.uk> - 2020-11-19 22:31 +0000
                Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-19 14:43 -0800
                Re: Good Hardware Tools Jim Jackson <jj@franjam.org.uk> - 2020-11-20 22:13 +0000
                Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-20 18:01 -0800
                Re: Good Hardware Tools James Brakefield <jim.brakefield@ieee.org> - 2020-11-21 11:39 -0800
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-18 03:15 -0800
                Re: Good Hardware Tools David Brown <david.brown@hesbynett.no> - 2020-11-17 22:25 +0100
                Re: Good Hardware Tools Dave Nadler <drn@nadler.com> - 2020-11-17 16:30 -0500
                Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-17 14:18 -0800
            Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-23 13:39 +0100
              Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-23 07:49 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-24 08:53 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-24 10:46 -0800
                Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-24 13:46 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-27 08:11 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-27 06:58 -0800
                Re: Good Hardware Tools Richard Damon <Richard@Damon-Family.org> - 2020-11-27 10:17 -0500
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-27 08:04 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-28 17:04 +0100
                Re: Good Hardware Tools Don Y <blockedofcourse@foo.invalid> - 2020-11-28 09:54 -0700
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-28 09:05 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-29 17:30 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-29 11:10 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-30 08:19 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-30 07:46 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-12-06 17:55 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-12-06 15:04 -0800
                Re: Good Hardware Tools Mat Nieuwenhoven <mnieuw@zap.a2000.nl> - 2021-01-03 11:03 +0000
                Re: Good Hardware Tools Brett <ggtgp@yahoo.com> - 2021-01-04 09:03 +0000
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2021-01-04 04:09 -0800
                Re: Good Hardware Tools Mat Nieuwenhoven <mnieuw@zap.a2000.nl> - 2021-01-04 21:57 +0000
                Re: Good Hardware Tools Don Y <blockedofcourse@foo.invalid> - 2021-01-04 02:55 -0700
                Re: Good Hardware Tools Grant Edwards <invalid@invalid.invalid> - 2020-11-28 20:53 +0000
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-28 15:16 -0800
                Re: Good Hardware Tools Richard Damon <Richard@Damon-Family.org> - 2020-11-28 20:57 -0500
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-28 18:07 -0800
                Re: Good Hardware Tools Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2020-11-29 10:43 +0200
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-29 11:00 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-30 08:01 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-30 07:40 -0800
                Re: Good Hardware Tools Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-11-30 15:41 +0000
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-29 15:22 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-29 11:04 -0800
                Re: Good Hardware Tools Don Y <blockedofcourse@foo.invalid> - 2020-11-29 14:46 -0700
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-29 15:11 +0100
                Re: Good Hardware Tools Grant Edwards <invalid@invalid.invalid> - 2020-11-29 23:24 +0000
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-29 17:57 -0800
                Re: Good Hardware Tools "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-30 08:32 +0100
                Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-30 08:03 -0800
          Re: Good Hardware Tools Paul Rubin <no.email@nospam.invalid> - 2020-11-16 13:13 -0800
          Re: Good Hardware Tools kegs@provalid.com (Kent Dickey) - 2020-11-17 22:56 -0600
            Re: Good Hardware Tools Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-18 03:20 -0800

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