Hi,

I was wondering if any of you could help us with this problem in our 
Finnigan Delta Plus XL.  This weekend, one of my students opened the 
needle valve for continuous flow work.  He then switched the source on, 
waited for few minutes to make sure that the water background was 
decreasing, and then he put the lid back on top of the 
mass-spectrometer.  Apparently, one of the sides of this lid fell 
somewhat hard on the instrument.  After that, the emission and high 
voltage LED were flickering.  The computer shows that the filament is 
off.  I can see that the LED for the emission is on, but the one for 
high voltage is off. When I pressed the source off, the high voltage LED 
comes on briefly and then it faints. Also, when I switched the source 
on, there is a high pitch, but barely audible sound coming from the 
right panel of the mass-spec.  I already checked to see if one of the 
wires or connections was loose, but everything seems fine.  I am hoping 
that any of you could give us some idea about how to fix the problem.

Thanks for your time,

Regards,

German

-- 
Germán Mora
Assistant Professor
Depart. of Geol. & Atmosph. Sci.
Iowa State University
Ames, IA 50011-3212

Phone: 515-294-7586
Fax:   515-294-6049
E-mail: [log in to unmask]