Help ammeter

The current meter that you referenced is obviously not going to work.  The current clamps will roll off on the higher frequency that you intend to measure.  As to what might be appropriate will depend more of what you are measuring.  Are you measuring a constant waveform or a pulsed signal?  If you can lend a little more detail on your needs, there may be people here who can provide some targeted solutions.  Also, what other resources do you have (i.e. multi-meter, oscilloscope?) and is this a single measurement or a form of long term monitoring?

Gene

Thanks for answering.
OK . I will try to be more objective and specific at the same time:
"It's a prototype for experiments in my workshop.
- The measurement is not constant. It is only within a period (example 10 seconds). But this current can change according to the voltage and charge variation. The voltage and charge value are set before measuring.
- The signal to be measured is AC, with a maximum frequency of 1MHZ and in principle the waveform does not matter. Sailing on the oscilloscope is not a priority but it can be interesting.
- Measure current between approximately 10ma to 6A (with maximum accuracy)
- The purpose is to measure the current and display this value on the display. In 5 seconds, for example, it is enough time to note this value.
"I do not know if it's possible to work on that signal using your home computer with software, too."
I hope you can help me.

David,

Attached is a part that might do the job.  It is only one part of a system and would require some additional support hardware (not an off-the-shelf solution).  I have used a very similar part in the past (and also on a project in progress) and I have have had good success with it.

I hope that this helps,

Gene

https://www.allegromicro.com/en/Products/Current-Sensor-ICs/Zero-To-Fifty-Amp-Integrated-Conductor-Sensor-ICs/ACS730.aspx

Okay, this seems perfect to me !!

And from what I saw in the data sheet the measurement is NON-INVASIVE. This is great, too.

I have only doubts about ISOLATION. If com10KV (is my maximum) on the line could have some problem.

I may not be able to find this IC here in Brazil. Maybe I'll try a sample for testing.

Does anyone here own or know someone to send me a sample?

David,

I would like to help you out, unfortunately I do not have this part.  I have a 5A version that is being phased out.  I have only one left and I still have one more prototype to build.

Good luck on the sample idea.  I have had pretty good luck acquiring parts as samples.

Gene

Okay, thank you. And my question of isolation? can you help me.

Até um usado seria bem vindo .

Okay, thank you. And my question of isolation? can you help me.

Até um usado seria bem vindo .

David,

Isolation is area that is a little weak for me.  First, I am not completely sure about your reference to com10KV.  Are you working at 10KV or are to trying to insure against, or protect from a 10KV event?  10KV is above the devices isolation specifications (see below).

It may be possible to shunt the high voltage, although given the devices low impedance that might be to likely.   Hopefully, others might have some helpful ideas and/or opinions.

Good luck,

Gene

The signal to be measured is in fact 10KV maximum.

But with low current and being non-invasive, maybe in practice it will not have problems.

I really do not know.

I'm sorry, I'm not an electronics expert.

There is a model in this same manufacturer where its insulation is of 4kv.

David,

Just a little confused.  It looked like you were measuring currents in the of 10mA to 6A, then you mentioned 'low current' above.  I guess it could be high current at low voltage and low current at high voltage, but whatever the combination, be safe.

Gene

Ok, I got it.

I'm just considering 6A being a low current.

Only that.

Thank you.