[RASMB] question about counter balance

[Leech, AP]

Hi Jia Bei, Walt,

We have two centrepieces, one weighs 31.62 g and the other 31.91 g
without weights.

The weights themselves are also not quite exact, they vary up to
about 0.05 g from the nominal marked weight.

Andrew

On 06/01/2011 23:45, Walter Stafford wrote:
> Hi Jiabei;
>
> It's possible that one of them is missing the masks (held in by a small
> hex screw) that provide the reference edges for the radial calibration.
> Take a close look. It may not be obvious at first glance.
>
> Walter
>
> --
>
> ===============================================
> Walter F. Stafford, Ph.D.
> Senior Scientist
> Boston Biomedical Research Institute
> 64 Grove Street
> Watertown, MA 02472
> 617-658-7808
> skype: w.stafford3
> ----------------------
> "Be kind, for everyone you meet is fighting a hard battle."  -Plato
> ------------------------------------
>
>
>
> Jia Bei Lin wrote:
>>
>> Dear professors and colleagues,
>>
>>        I’m in the learning process of using the Beckman XL-A
>> analytical ultracentrifuge. There are two counter balances in the lab,
>> one of them is 33.6 grams and the other is 31.7 g just by themselves
>> (no weight inside). Why are they made in different weight? They look
>> identical from outside, what’s inside made the difference?
>>
>>      Thank you very much.  Happy new year.
>>
>> Jiabei Lin
>>
>>
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>>
>
>
>
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Dr Andrew Leech                   *  Laboratory Head
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