I had a friend give me a Hipot from his work that he wanted checked out. Hipots not being my specialty or having done one in ten plus years I thought "great" time to relearn hipots.
It's an Associated Research 3570D AC/DC Withstand
The owners manual requires a DMM capable of reading 5kv. (Which I don't have)
First question: How can I check the 5kv with a meter that maxes out at 1kv?
I managed to get the IR current reading but the Withstand Current reading still eludes me. The unit just beeps at me saying "hey dummy hipots are not your thing" With an overload condition.
Any help would be greatly appreciated.
HV probe (basically just a 1 G ohm resistor) with a Fluke 189 is what we use to check the High Voltage. For the withstand current use a resistor in series with the 189 and use that ohms law thing we all learned wayyyyy back.
300 volts across a 15k resistor would be 20 mA for example
I'm not a salesman for them, but a lab I used to work at used one of the IET Labs high resistance decade boxes for those current measurements.
We put together a package for a customer a couple years back to calibration high voltage equipment like HiPots.
To Measure Voltage at that value, you will need a divider.. The divider we were using was 100000 to 1 (i believe). So you put in 5k and get 50mV out.. But be careful, you put 5 kV into you dmm, you will probably be buying a new one.
Current is a whole different set up, and I can only attach one picture. I believe the error you are getting is because the UUT is not loaded. You will have use resisters in series to load the Hipot correctly. And I strongly recommend you use a hand held DMM.. If you connect it wrong, you will be buying a new DMM..
I will be presenting a paper at NCSLI this year. The paper uses a HiPot calibration as a sample, showing how A2LA's uncertainty requirements can be fully calculated in Fluke's MET/CAL.
If any of you are going to be there, please hit me up.
If you forget that divider to UUT ground connection you WILL fry the meter, lost a couple 8842As because of it.