Measuring 240 Volt AC

Instruments HPS140 Handheld Pocket Oscilloscope
1

Hi there,

a simple question: :stuck_out_tongue:

how to measure the inrush current of
a PC Powerunit.
I want to select the correct protecting device.

Thanks for an advive,

Charlie

mailto:k.nester@ieee.org

2

Please note that a scope is a Volt meter, not an Ampère meter, it measures tensions, not currents.
Theoretically, you could use a shunt and measure the voltage over the shunt, however, a decent multimeter or clamp A-meter would be a better tool to measure inrush currents.

3

Hi Joined,

thanks for your reply.

In the meantime I solved my problem.
I found in my service box a AC Current clamp with output mv/A.
The clamp has 3 selections
4A Output :100mV/A
40 A: 10 mV/A
400 A:1 mV/A

Thanks again …

Karlheinz