[RASMB] Xl-I wavelength check question

[Leech, AP]

Hi everybody,

Some systems, like our XL/I, have an extra window in the monochromator
mounting socket, which helps save on lamp cleaning as it keeps the oil
from "cracking" on the lamp surface. Our lamp intensity is quite low
(~10000), whether this is affected by the extra window I don't know,
but it doesn't go down much with use.

It is worth checking this window from time to time - if your AUC has one
you should have a special tool for extracting it (like a screwdriver
with a round magnetic end).

Best to all,

Andrew


Borries Demeler wrote:

> 
> Hi Mark,
> I should mention that we have to clean our lamps quite regularly, depending
> on use perhaps every 2-3 weeks. The procedure is simple enough, it would be
> worthwhile to have the service person teach you how to do it yourself. 
> Sometimes other optical components also require cleaning, but the lamp
> is usually the biggest culprit. Lamps do vary in intensity at 230 nm, most
> I have come across range between 12-30 kcounts when cleaned. The UV intensity
> is lost first, I guess dirt absorbs in the UV stronger than in the vis.
> 
> Regards, -Borries
> 
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-- 
Dr Andrew Leech                   *  Laboratory Head
Technology Facility               *  Molecular Interactions Laboratory
Department of Biology (Area 15)   *  Tel   : +44 (0)1904 328723
University of York                *  Fax   : +44 (0)1904 328804
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