Hi Chris
Check to see if you have voltage on pins J48 and J49 with the filament leads (P48-P49) disconnected.  You should read about 8 volts.  If not, then there is a problem with the filament power supply.  Connect the leads of the meter onto the pins with the source OFF.  Turn source ON and read the value. Use a good meter because it will float to the accelerating voltage of 3kV.
 
Gilles

	-------- Message d'origine-------- 
	De: Stable Isotope Geochemistry de la part de Chris Yarnes 
	Date: lun. 2006-04-03 15:29 
	À: [log in to unmask] 
	Cc: 
	Objet: [ISOGEOCHEM] D+ emisson
	
	

	ISOGEOCHEMers:
	
	We have a Delta Plus that recently lost source HV and emission (but not
	high voltage) for an unknown reason.  After fixing the vacuum system, we
	were still unable to restore emission.  We have tried replacing the
	filament, checked the source leads, checked the filament on the board
	(J48/49), board fuse looks good and source ceramics are all intact. 
	We've even tried just powering down the instrument and that didn't work
	any magic.
	
	Any ideas?  We're fresh out right now, and any help would be most
	appreciated.
	
	Thanks,
	
	Chris Yarnes
	
	--
	
	Chris Yarnes, Ph.D.
	SIRF Manager
	Dept. of Earth and Space Sciences
	University of Washington
	Seattle, WA 98195
	206.543.6327