MJLorton Solar Power and Electronic Measurement Equipment Forum

Youtube Video Episodes => YouTube Video Episodes => Topic started by: SeanB on November 18, 2012, 10:39:48 AM

Title: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: SeanB on November 18, 2012, 10:39:48 AM: http://youtu.be/8-bbe0GSzls

A new shocking episode for you.
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: SeanB on November 18, 2012, 10:52:45 AM: I think you need this to test the input protection........

http://www.galleryoflights.org/mb/gallery/displayimage.php?pos=-7378

15kV at 30mA, will definitely light up your life a lot.
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: MJLorton on November 19, 2012, 02:34:37 AM: Quote from: SeanB on November 18, 2012, 10:52:45 AM
I think you need this to test the input protection........

http://www.galleryoflights.org/mb/gallery/displayimage.php?pos=-7378

15kV at 30mA, will definitely light up your life a lot.

Classic!

Re: T4D #33 - I certainly want to do a test of the input protection on a multimeter or two...but the taser might be no contest....I might try a short through the current input with mains from the inverter....Fluke vs Uni-T....due care and safety taken into account....
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: SeanB on November 19, 2012, 10:20:00 AM: I have a spare one if you want it..... Physical address and I will send it via Berco.
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: Monkeh on November 19, 2012, 02:03:00 PM: Quote from: MJLorton on November 19, 2012, 02:34:37 AM
Quote from: SeanB on November 18, 2012, 10:52:45 AM
I think you need this to test the input protection........

http://www.galleryoflights.org/mb/gallery/displayimage.php?pos=-7378

15kV at 30mA, will definitely light up your life a lot.

Classic!

Re: T4D #33 - I certainly want to do a test of the input protection on a multimeter or two...but the taser might be no contest....I might try a short through the current input with mains from the inverter....Fluke vs Uni-T....due care and safety taken into account....

The fuse will pop and that'll be it.
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: SeanB on November 19, 2012, 03:11:31 PM: 15kV will happily arc over the fuse, and burn it's way through everything. The lamp that was there blew after a short uninteresting life ( Chinese made junk) but with this as power it gave light, and got hot enough to burn the board under it after a minute.
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: Monkeh on November 19, 2012, 06:05:56 PM: Quote from: SeanB on November 19, 2012, 03:11:31 PM
15kV will happily arc over the fuse, and burn it's way through everything.

I don't think his inverter puts out 15kV.
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: SeanB on November 19, 2012, 11:29:30 PM: Yes, quite right, I was thinking of the NST. Shorting the inverter output though will not be good for it, depending how the output protection is, it might be terminal for the inverter.
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: Monkeh on November 20, 2012, 05:37:23 AM: Quote from: SeanB on November 19, 2012, 11:29:30 PM
Yes, quite right, I was thinking of the NST. Shorting the inverter output though will not be good for it, depending how the output protection is, it might be terminal for the inverter.

I should hope the inverter is designed to handle a short circuit until a protective device operates, otherwise it's not fit for purpose!
Title: Re: T4D #33 - Input Protection and Ultimate Multimeter buyers Guide
Post by: DaveXRQ on November 21, 2012, 03:25:17 AM: You put the UNI-T into the mains and it will just pop that's all :P It's the same fuse you find in a proper UK socket and the BS1362 (not the glass rubbish that i find sometimes, not sure which idiot placed it there) blows without any fireworks or any fantastic things happening ..