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-   -   calibrating insulation continuity testers (http://www.diychatroom.com/f18/calibrating-insulation-continuity-testers-38278/)

steve halliday 02-13-2009 05:15 PM

calibrating insulation continuity testers
 
hi i was wondering if anyone can help me, to calibrate a insulation continuity tester on the 3 ohm range to 1 ohm . what can you use to do that and how to make one

Yoyizit 02-13-2009 10:13 PM

Quote:

Originally Posted by steve halliday (Post 229914)
insulation continuity tester the 3 ohm range to 1 ohm
what can you use to do that
how to make one

Please 'splain.

steve halliday 02-14-2009 02:07 AM

Quote:

Originally Posted by Yoyizit (Post 230034)
Please 'splain.

i'm not sure but i think you need a 1 ohm resistor or some thing and when you put your tester on the 3 ohm range it should read 1 ohm. if not you adjust

Yoyizit 02-14-2009 04:43 PM

Quote:

Originally Posted by steve halliday (Post 230092)
i'm not sure but i think you need a 1 ohm resistor or some thing and when you put your tester on the 3 ohm range it should read 1 ohm. if not you adjust

Post a photo.

EBFD6 02-14-2009 08:13 PM

As a commercial/industrial service electrician, I have seen, used, or at least heard of pretty much every piece of test equipment imaginable, but I have never had to calibrate an insulation tester.(I am assuming you meant an insulation and continuity tester, I have never heard of an insulation continuity tester)

I own an insulation tester (megohm meter) and use it regularly, but to my knowledge there is no way to field calibrate it.

I also own several different types of continuity testers and again, no calibration needed.

If you could post the make and model number of your tester we may be able to help, otherwise I am just confused.

Yoyizit 02-14-2009 08:18 PM

Insulation is about lack of electrical continuity.:confused1:

If you're talking about a megger, I guess you could wire 10 ea., 10 meg +/- 10% resistors in series and get a 100 meg +/- 3% composite resistor.
If you wire 100 ea. you get 1000 meg +/- 1% resistor.

Ten will cost you 50 from this place
http://www.allelectronics.com/index....eg+ohm&x=0&y=0
but I couldn't find a tolerance spec or max voltage rating (usually it's 500v) on their webpage.

steve halliday 02-14-2009 10:04 PM

thanks for your help


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