Howdy.
Ive got a Melles-Griot 643 ar-kr that is wanting to fire down the gas return path instead of the bore.
I ran it for about 7 hours last night and need to run it again today. This morning, it keeps starting down the returns instead of the bore. I shut it off within a half a second of it firing because I read that its very bad for it to run down the returns. Discharge going down the returns makes it more electrically conductive and wants to fire down the returns. The bore is clean because the first start pulse lases (just the pulse, not continuous).
It stays lit on the first or second pulse every time.
Advice? suggestions?
Thanks in advance.
-Nate.