Measure current with strange output

[Kris Lee]

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

 

[Tha fios agaibh]

Use a shunt.

 

[BobK]

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

 

[Tha fios agaibh]

 

[hevans1944]

This Hall Effect device available from Allergo is ideal for this application. Some signal conditioning required.

 

[kellys_eye]

A cheap DC clamp ammeter and a cheap digital voltmeter.

 

[CTP4500]

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.

 

[hevans1944]

Is this what I think it is?

No. Your thoughts, as expressed in your post to this thread, are incoherent. Please try again. And welcome to Electronics Point.