I would like to measure an induced voltage of 160mV generated when a current of 30mA pass through the differential transformer owing to a load.
I am imaging that I should isolate it by using a OpAmp and at the same time, amplify it 7.2 times, in order to obtain 1.2Vac. At this point I should rectify the signal so I can read it by an ADC.
Does anyone know how to measure this low voltage?
How I can avoid the saturation of the differential transformer?
How a multimeter works? the 160mVac were read by a digital multimeter.
How I must handle the ground or earth.
In the figure, at the upper right corner is the output (two terminals) where the induced voltage is read by the digital multimeter, when inside the transformer and in one wire of the AC voltage flows a current of 30mA of course a resistive load demands that flow.
The only data I have from the Txformer is 8 ohm, it is linear and works up to 700 volts.
Can you help me what can I do?
I connected a resistor of 99k between the two terminal then I put the multimeter, but the values changed. I have to sample this signal so I have to rectified this before sampling.
What special consideration I have to take into account about the diff. txformer.
Thanks in advanced
I am imaging that I should isolate it by using a OpAmp and at the same time, amplify it 7.2 times, in order to obtain 1.2Vac. At this point I should rectify the signal so I can read it by an ADC.
Does anyone know how to measure this low voltage?
How I can avoid the saturation of the differential transformer?
How a multimeter works? the 160mVac were read by a digital multimeter.
How I must handle the ground or earth.
In the figure, at the upper right corner is the output (two terminals) where the induced voltage is read by the digital multimeter, when inside the transformer and in one wire of the AC voltage flows a current of 30mA of course a resistive load demands that flow.
The only data I have from the Txformer is 8 ohm, it is linear and works up to 700 volts.
Can you help me what can I do?
I connected a resistor of 99k between the two terminal then I put the multimeter, but the values changed. I have to sample this signal so I have to rectified this before sampling.
What special consideration I have to take into account about the diff. txformer.
Thanks in advanced