All,
This doesn't look like a hipot, but just a low current HV supply. A hipot will
have a meter to show the trip current, and most of the time, a current trip
lamp will glow once a set current shows through the device under test. Even
though this one will show current doesn't mean it shows trip current (current
where the device fails or very low current). If it's a hipot, there should be a
trip current adjustment on it. One could use it as a HV supply and build an
external trip circuit. The one on Rich Measures website shows how to do this.
There's a few other hipot projects on the net also. A quick search on ebay for
hipot will show the difference.
Best,
Will
*********** REPLY SEPARATOR ***********
On 7/9/06 at 9:40 AM ToddRoberts2001@aol.com wrote:
>In a message dated 7/9/2006 8:57:13 AM Eastern Standard Time,
>jbigham2@kc.rr.com writes:
>I have never used one of these, what do you do? Hook it up to the item to
>be
>checked and begin increasing the Kv and watch for current to flow at some
>point? Then note the voltage at which the current flows? I would assume
>such a
>device is very limited in its current ability.
>Thanks for info.
>Gene KB0GU Bigham
>
>It doesn't look like there is enough info in the listing to tell if the
>hi-pot tester would be suitable for checking items an amplifier builder
>would be
>interested in like vacuum variables, vacuum relays, or vacuum tubes. For
>checking those items for high-voltage leakage you need a hi-pot tester
>with a
>microammeter range capable of reading only a few microamps and a voltage
>range of
>probably at least 0-10KV. The item listed has what looks like a meter
>range that
>reads in milliamps - this would be way too high a range. We would need
>something with a scale of perhaps 0-10 or 0-20 microamps. Also the item
>listed does
>not say how many KV it will adjust to. Many vacuum variables have
>operating
>voltages of 10KV or more so you want a hi-pot tester that will go to at
>least
>10KV or more. Any object reading more than 5-10 microamps of leakage at
>its
>normal operating voltage would be suspect. 73 Todd WD4NGG
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