Connect with us

Measure current with strange output

Discussion in 'General Electronics Discussion' started by Kris Lee, Feb 28, 2018.

Scroll to continue with content
  1. Kris Lee

    Kris Lee

    1
    0
    Feb 28, 2018
    Brand new to the forum and looking for help.

    I am working on a project where i need to be able to measure the voltage and current from a welding source but i need to provide the information to another devise with the following parameters.

    Voltage: 1 volt per 10 volt measured
    Current: 1 VOLT per 100 amps measured

    the voltage is simple with a resistor in line
    The current is my problem.

    Anyone have any ideas?

    Thanks
     
  2. Tha fios agaibh

    Tha fios agaibh

    2,106
    708
    Aug 11, 2014
    Use a shunt.
     
  3. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    For the voltage you need a votage divider with two resistors in a ratio of 9 to 1.

    For the current a 0.01Ω resistor would work but it would dissapate 100W of the current is 100A. A hall effect current sensor, probably coupled with an opamp to adjust the output range.

    Bob
     
    hevans1944 likes this.
  4. Tha fios agaibh

    Tha fios agaibh

    2,106
    708
    Aug 11, 2014
    Screenshot_2018-02-28-14-08-41-1.png
     
  5. hevans1944

    hevans1944 Hop - AC8NS

    4,521
    2,102
    Jun 21, 2012
    This Hall Effect device available from Allergo is ideal for this application. Some signal conditioning required.
     
  6. kellys_eye

    kellys_eye

    4,276
    1,146
    Jun 25, 2010
    A cheap DC clamp ammeter and a cheap digital voltmeter.
     
  7. CTP4500

    CTP4500

    21
    0
    Mar 3, 2018
    Is this what I think it is? shunt is used to discharge any electric, so none is present in the module at setup. This device uses cables. Each volts measured is based on Amp/hours. 7 Amp/hours. supplying 7 amps for one hour across a load of say, 300 ft. getting of cable. 12 volts connected, twice. In series.
     
    Last edited: Mar 3, 2018
  8. hevans1944

    hevans1944 Hop - AC8NS

    4,521
    2,102
    Jun 21, 2012
    No. Your thoughts, as expressed in your post to this thread, are incoherent. Please try again. And welcome to Electronics Point.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-