Tongs Current Puzzle


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EDNEDN
Guru

Joined: 18/02/2023
Location: United States
Posts: 306
Posted: 03:28am 18 Jul 2025      

  zeitfest said  Maybe try demagnetizing the clamp and re-zero (?)


Yes!  Check if the clamp is magnetized.   A tiny bit of magnetization isn't much of a problem.  But if you can pick up and hold small pins or needles with it, you won't be able to measure accurately with the clamp.

The big problem I've had is it is really hard to demagnetize those clamps.   The hysteresis values are pretty high.   And you have to take it deep into hysteresis (in the right direction) to undo the magnetization.
Edited 2025-07-18 13:28 by EDNEDN