[meteorite-list] Scales - Looking for Advice

From: jbaxter112 at pol.net <jbaxter112_at_meteoritecentral.com>
Date: Sat, 9 Dec 2006 19:15:43 -0500 (EST)
Message-ID: <48349.10.250.10.1.1165709743.squirrel_at_sq04.pol.net>

Hello Norbert,

I for one would like to hear your final conclusion. I have considered
buying such a scale for some time. I have been too busy, or too lazy if I
am to be honest, to do my homework and would love to benefit from your
efforts. I am sure I'm one of many on the list that has considered buying
a scale so I'm sure others would be interested as well.

Best Wishes,
Jim Baxter

> 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
>>
>>
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Received on Sat 09 Dec 2006 07:15:43 PM PST