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Re: Gauges

Posted By: SVP Neon Equipment
Date: Saturday, 30 March 2013, at 7:55 a.m.

In Response To: Re: Gauges (Romarrk)

> It can be done very inexpensively if you
> don't mind some basic electronic D.I.Y.

> That's what I did myself.

> You need some passable thermocouple gauge
> tube (DV6 like), constant current source at
> around 100 milliamps and good enough
> multimeter, able to read around 10
> millivolts.

This would be funny if it were not for the fact that you actually want some unsuspecting person to believe it. I don't think Bill wants a crash course in "backyard electronics" just to check his vacuum. What he needs is a decent quality analog gauge with a shielded meter just in case he ever decides to permanently connect it to his manifold by way of an isolation stopcock.

More on what you said: Are you sure about putting 100 mA through a DV-6M gauge tube under vacuum? If you *think* that's what you did, I would have your "constant current source" checked for calibration. But then, I'm sure you can do that yourself too. After all, running a neon shop out of your kitchen (and being scared to death of mercury) does have a lot of advantages over factory trained technicians in an appropriate environment with the necessary equipment doing certified work.

BTW, what happened to your broken Russian English??? Seems to have disappeared all of a sudden.

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