[meteorite-list] Scales - Looking for Advice

From: Michael L Blood <mlblood_at_meteoritecentral.com>
Date: Sat, 09 Dec 2006 17:28:19 -0800
Message-ID: <C1A0A2B3.312D3%mlblood_at_cox.net>

Hi Norbert,
    Probably better than the NET, is to check out the ones you
see people using at the Tucson show and write down the
type and model of the one you like best. People will readily
tell you what they like and don't like about theirs, how much
it costs, etc. On the net, there are a million and they all
say they are superior, of course.
        Best wishes, Michael

on 12/9/06 2:22 PM, Norbert Classen at trifid at timewarp.de wrote:

> Thanks Michael, your comments surely help. The scales I had in mind are all
> in the 100$ range, like you said, and they are small portable instruments.
> Anyway, I guess I'll have to look around on the net to find out which one is
> the most accurate of these.
>
> And before I forget it: I'd also like to thank all the other people who
> responded.
>
> All the best,
> Norbert
>
> -----Urspr?ngliche Nachricht-----
> Von: Michael L Blood [mailto:mlblood at cox.net]
> Gesendet: Samstag, 9. Dezember 2006 16:36
> An: trifid at timewarp.de; Meteorite List
> Betreff: Re: [meteorite-list] Scales - Looking for Advice
>
> Hi Norbert,
> You write, "I'm looking for an affordable but precise digital
> pocket scale." In some ways, the qualities you seek are mutually
> exclusive. You want:
> 1) Portable
> 2) "Precise" (a variable term)
> 3) "Affordable" - also a variable term.
> Let me share my own experience regarding the exact same
> desires and also what I have seen:
> I own a 4 KG scale accurate to within .1g - However, I had to
> pay to have it "calibrated" exactly where it sits in my office and
> not move it for it to remain "stable" and predictable in its accuracy.
> (according to the calibrator, who spoke of various factors such
> as how close other metal objects are as well as NEVER moving
> the scale). This scale costs over $1,000 new, though I got it used
> and paid for factory refurbishing and then calibration on site for
> much less, as a friend sold it to me for like $75 without one of the
> parts, which I easily replaced from the manufacturer.
> At the other extreme, I have a scale that goes to 120g. This is
> also a non-portable scale and weighs to 1/1,000th of a gram and
> cost me about $5,40.
> Third, I have a portable (battery driven) scale that weighs up
> to like 200 Kg. It is amazingly light for what it does and only cost about
> $100, though I do not know how precise it is. It is, of course, for big
> irons or gigantic stones, and I take it to the show - I keep it in the
> motor home, as I have infrequent use for it in the office. It is "portable."
> The 4th scale I use is closer to what you want: It is a Tanita
> portable (Model #1481) and cost me $42.50. It is VERY slim, metal, light
> and fits easily into a shirt pocket. They list for $89 or $99 on the Tanita
> site, but several dealers offer them on eBay new and "in the box." One
> offers hem for the incredible price of $42.50. It will weigh up to 120g at
> 1/10th of a gram. I have not compared this new one with my 4Kg scale,
> but the old Tanita I had for years weighed exactly to the same 1/10th
> gram as the stationary scale that was calibrated.
> None of these are likely to be what you want, but generally
> demonstrate the range in prices and the problem presented with
> a mobile unite combining fine measurement with low price. At the show,
> I have seen many units that claim to measure to the 1/100th of a gram
> with accuracy with similar mobility. I think they are about $120. You
> can even get a small, but not truly pocket portable unit that will go
> to 1/1,000 th of a gram and are said to be "inexpensive" - but I am
> not clear what that means.
> You would likely be best satisfied with a truly portable unit that
> measures to 1/100th in the $100 cost range, but only you would know
> for sure.
> Best wishes, Michael
>
>
> on 12/8/06 4:18 PM, Norbert Classen at trifid at timewarp.de wrote:
>
>>
>> Hi All,
>>
>> I'm tired of visiting the petrologic lab of our local university each time
> I
>> want to accurately weigh a new sample. Besides that, I would love to have
> a
>> small but precise portable scale that I could carry to the shows...
>>
>> Since I'm mostly into micros, and more rare meteorites, such as lunar or
>> martians, I'm looking for an affordable but precise digital pocket scale,
>> best with 1mg or 2mg resolution, and now I'm wondering how accurate the
> more
>> common gem and diamond scales actually are. Does anyone of you, collectors
>> and dealers, have some experience with the accuracy, and properties of one
>> of the following scales?
>>
>> - Gempro 50 (My Weight)
>> - JS-VG 20 (Jennings)
>> - JPG 10 (JScale Precision/Jennings)
>>
>> These are the ones that seem to be more common. Would you recommend the
> one
>> or the other? Any other scales that you could recommend?
>>
>> Thanks for your input, and for your advice!
>>
>> All the best,
>> Norbert
>>
>> http://www.meteoris.de/
>> Planetary Meteorites
>>
>>
>> ______________________________________________
>> Meteorite-list mailing list
>> Meteorite-list at meteoritecentral.com
>> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
> --
> It is difficult to get a man to understand something if his
> salary depends on him not understanding it.
> - Upton Sinclair
> --
> What gets us into trouble is not what we don't know.
> It is what we know for sure that just ain't so.
> - Mark Twain
>
>
>
>
>
>
>
>
>

--
It is difficult to get a man to understand something if his
salary depends on him not understanding it.
  - Upton Sinclair 
--
What gets us into trouble is not what we don't know.
It is what we know for sure that just ain't so.
   - Josh Billings (but oft credited to  Mark Twain)
  

Received on Sat 09 Dec 2006 08:28:19 PM PST