CC-65 AC/DC Current Clamp Digital Multimeter with BNC Connector l

Very happy with this product and it works perfectly.

Super

Muy buen funcionamiento

worked great.

When I first got my new current probe out of the box, I thought it was dead. Plugged the 9v battery (Not Included) into the back, plugged it into my DSO, switched it on, and... nothing. No lights. No change in the level when I hit 'zero', no readings when I clamped it onto the Vin line on my project. Except sometimes when I wiggled the switch just the right way, pressed down on it, the green 'Power' light would flicker for a second. I gave it a little shake, and I could hear a little rattle. I took the hazardous step of opening the back to see what was going on, and the problem was immediately apparent. Instead of using a discrete 3-position dptt switch, there's a hacky little arrangement that's prone to failure if you look at it funny. The plastic switch wiper has a pair of ductile little pieces of bent copper which are retained solely by compression between the wiper and the PCB underneath, and as they slide back and forth they make or break connections between tinned pads on the PCB. I suspect that pressing down too hard on the switch can bend them out of shape and let them fall out of place. It was a fiddly little fix bending them back into shape and lining everything up so it didn't fall apart again when I closed it back up, but it seems to work well enough as a current probe now. Sensitivity is acceptable at 100mv/A. I haven't had time to formally assess the accuracy and frequency response, but it seems to work reasonably at the low frequencies and currents I was using today.