undefined | Better HN

0 pointsnickt2y ago0 comments

The probes aren’t big enough. That’s why it’s often a big screwdriver and jump lead to earth.

The better option is the Fluke 80K 40.

https://www.fluke.com/en-us/product/accessories/probes/fluke...

0 comments

Not big enough in what way? A normal probe should be able to handle the distancing and the small current fine. Maybe it would lack insulation but I wouldn't use the word "big" for level of insulation.

kens2y ago

Typical probes are rated for 600 volts (CAT III), so you'd have insulation rated for 600 volts between your fingers and 30,000 volts, which is kind of hazardous.

Here's a recent Twitter video showing what happens when you combine a flyback transformer and faulty insulation: https://twitter.com/zh1nu/status/1673487720780529664

Grazester2y ago

Well that might have left a mark. Why would they try to touch it anyway? Even well insulated, I wouldn't try to touch something I didn't need to.

Dylan168072y ago

When you combine a running transformer and weak insulation, and also there's no exposed metal where you intend for the current to go. So that probably comes off pretty differently.

But my use of the word "maybe" is more because of overall confusion about the word "big".

j / k navigate · click thread line to collapse

0 pointsnickt2y ago0 comments

The probes aren’t big enough. That’s why it’s often a big screwdriver and jump lead to earth.

The better option is the Fluke 80K 40.

https://www.fluke.com/en-us/product/accessories/probes/fluke...

0 comments

Dylan168072y ago

kens2y ago

Typical probes are rated for 600 volts (CAT III), so you'd have insulation rated for 600 volts between your fingers and 30,000 volts, which is kind of hazardous.

Here's a recent Twitter video showing what happens when you combine a flyback transformer and faulty insulation: https://twitter.com/zh1nu/status/1673487720780529664

Grazester2y ago

Well that might have left a mark. Why would they try to touch it anyway? Even well insulated, I wouldn't try to touch something I didn't need to.

Dylan168072y ago

When you combine a running transformer and weak insulation, and also there's no exposed metal where you intend for the current to go. So that probably comes off pretty differently.

But my use of the word "maybe" is more because of overall confusion about the word "big".

j / k navigate · click thread line to collapse