how to measure AC current

FvM · Feb 15, 2016

Increase C4 or the sensor series resistance.

aliyesami · Feb 15, 2016

FvM said:
Increase C4 or the sensor series resistance.

ok I will increase R2.
the circuit will still function the same and measure all the range of input conductivity right?

FvM · Feb 15, 2016

The series resistance makes the relation between conductance G and frequency slightly non-linear. You can calibrate the circuit by connecting different fixed resistors.

aliyesami · Feb 15, 2016

Hi Fvm
Will changing the value of series resistor jeopardize the quality of input signal ?

Warpspeed · Feb 15, 2016

Increasing the resistor will lower frequency and effect linearity.
Changing the capacitor just lowers the frequency.

aliyesami · Feb 15, 2016

Oh ok then i will change the capacitor. Shohld i increase it?

Warpspeed · Feb 15, 2016

Frequency will decrease in direct proportion to capacitor increase.
100nF = 12Khz max (what you have now)
120nF = 10 Khz max
150nF = 8Khz max

how to measure AC current

FvM

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aliyesami

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FvM

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aliyesami

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Warpspeed

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how to measure AC current

FvM

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aliyesami

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FvM

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