I suspect the HV probe is designed to be used with a specific voltage meter and the probe will provide a series resistance (370 MOhms) working as a voltage divider with the input impedance of the meter it's designed for.
I imagine finger oils on those high value resistors may cause some non linear extra conductivity. Might be interesting to see if the resistance changes uncleaned vs. Careful isopropyl cleaning of the resistor body.
I use a similar meter to check the caps in tube gear for electrical leakage. So often, you have one that seems to be fine in the lowest range, but when you go one higher, the cap breaks down.
That little box might be just the ticket for measuring the polarization Index (PI) of small generator windings to determine if they will last another 30 years...for $15-17 and a 9V it's a steal of a deal
Nice, I was just looking on eBay at one of these. I think I would much prefer it to always be locked out until the test button was pressed? seemed like you can switch it off and then back to live without the button being pressed. EDIT: I just watched a similar video from "TheHWCave" definitely worth a look! as he comments on the not so safe aspects of the design for this particular tester.
I used to have an old hand-cranked Megger insulation/continuity tester. Great fun but not as handy as modern ones and it probably wouldn't pass certification now anyway.
I bet having two sets of voltage ranges is so you can quickly go to Off in no more than 2 steps. I am curious on what the max current is on this meter. I bet it isn't much so not super dangerous even at 1000v. To register 0.1M ohms, which appears to be the minimum reading, at 1000v only need 10mA. That might smart a bit but typically won't kill.
I have the english well Chinesium version of the instructions it says the maximum range of the meter is 1999 M ohms L to measure less tha is the input terminal to be tested, the G is the shielded terminal of the insulating resistance and E input terminal Connected to earth terminal of the tobe tested object. "I" will be displayed for overload sampling rate is 2.5 times per second, and a lot more Special attention in operation when use at 500V to measure less than 1.5 M ohm 1000V to measure less than 5M Ohm measurement time must not exceed 10 seconds. See as clear as mud, oh and the ends should be discharged after pressing stop . HAve fun and Enjoy :-)
Merriam-Webster defines irregardless as "nonstandard" but meaning the same as "regardless." "Many people find irregardless to be a nonsensical word, as the ir- prefix usually functions to indicates negation; however, in this case it appears to function as an intensifier," the dictionary writes.
@@IMSAIGuy Sure, but it's so much fun to be a critic! ;-) Also, 50 years ago I had a friend who went to Catholic School, and he said the nuns would beat you if you used that word...
This is good for testing the dielectric in coax cable. When you apply a high voltage to things that appear not to be leaky with a regular ohm meter they will show up leaky when you apply a higher voltage to measure the leakage current. There's a good video here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mXWacoQBWq4.html that shows some other uses.
This video helped me a lot, thanks for putting it up. Here is a link to the manual below. Still doesn’t make sense as to what the third lead is. I think for mains powered equipment E goes to earth, L to line or active and G to the surface or chassis being tested. Here is the English manual. img.banggood.com/file/products/20161209004235BM500A%20maunal(1).pdf
