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hI All--

OK, it's "Isotope MS/ScaleHV"...and in same steps at Peak center--so can 
get and set that...
The "Isotope MS/HIghVoltage" is the read back value on the screen, and 
jumps around a little as the readback value does--and it's steps 1/16 of 
Peak Center and MS/Scale.

take care,

gerry

On 1/15/2013 12:42 PM, Gilles St-Jean wrote:
> Hi Andy
> The voltage of a 253 is 0-10KV and the steps are done through a 16 bit DAC. Thus 2^16 = 65536 or from 0 - 65535 steps.  Therefore you have 65536 steps/10000 Volts = 6.56 steps/Volt
>
> Gilles
>
> Gilles St-Jean
> Scientifique en Recherche et Développement / Research and Development Scientist
> Université d'Ottawa / University of Ottawa
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>
>
> -----Message d'origine-----
> De : Stable Isotope Geochemistry [mailto:[log in to unmask]] De la part de A. Schauer
> Envoyé : 15 janvier 2013 10:17
> À : [log in to unmask]
> Objet : [ISOGEOCHEM] High Voltage - volts vs steps
>
> Hello,
>
> With respect to high voltage on a Thermo MAT253, what is the conversion between volts and steps?
>
> andy
>
> Andrew Schauer
> 206.543.6327
> [log in to unmask]
> http://depts.washington.edu/isolab/
>