Avo valve tester questions.

[bassetrox]

Hi Guys,

A while ago I picked up an AVO valve tester second hand - supposed to be in working condition.

Can anyone advise me of a sensible way to check whether this thing is working sensibly?

I have used one once before, I used to work for a tech who had one, but it was quite a few years ago.

Thanks,

R

EDIT: I've just realised this thing doesn't have a socket for 9 pin valves. D'oh!!!!! Ebay this one then!!