Products > Test Equipment
AC current measurement digital multimeter
arivel:
Hi everyone .
I am not referring to a particular model but in general to all digital multimeters.
When making an AC current measurement, which frequency range can I use? .
I have never thoroughly investigated how multimeters measure alternating current, can you explain it to me? perhaps the measurement is related to the RMS voltage value?.
jonpaul:
Chinese, consumer, cheap: $100< mains..1k Hz perhaps 2..5% accuracy avg respond.
>$500 , HP, Keysight, Fluke 4.5..6.5 D TRMS mains...10k...200kHz
j
Kleinstein:
It depends on the models. Usually there are specs to show the frequency. Something like up to some 1 kHz maybe a bit more is common for cheap meters, but there are exceptions.
With modern chip sets there are also relatively cheap (e.g. $25 range) RMS responding meters with a limited maximum frequency of some 1-3 kHz.
Better handhelds may work up to some 50 or 100 kHz.
Frequencies much below 40 Hz often don't work well, as there is a balance with the response speed.
The precision of the current ranges is anyway often not that good. So here it is not just the AC part but also just the shunts, especially for larger currents with significant self heating or effect of the solder joints.
AVGresponding:
The Fluke 8060A still stands out, for this type of measurement...
https://assets.fluke.com/manuals/8060a_3vimeng0200.pdf
arivel:
Thank you
Navigation
[0] Message Index
[#] Next page
Go to full version