Testing Nanogenerator Help Please

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Tue, 04/09/2019 - 14:05

OllieH

Testing Nanogenerator Help Please

Hi,

I am trying to test the output of a nanogenerator with a U3-HV.

I am expecting an output current ~2 microAmps and open circuit voltage of 4V.

Any suggestions how to test this would be greatly appreciated

Thanks

Tue, 04/09/2019 - 14:10

LabJack Support

So you want to measure

So you want to measure voltage and current? Measuring a voltage around 4 volts does not sound too bad, but measuring 2 microamps could be challenging. A shunt resistor with an amp is the likely solution for you. What is the range of current you want to measure and with what resolution?

https://labjack.com/support/app-notes/measuring-current

Tue, 04/09/2019 - 14:22

OllieH

Yes I need to test both,

Yes I need to test both, although doesn't need to be simultaneously.

A range of 20microamps but resolution is not too critical. I had considered a shunt resistor as you have attached but was unsure of the mA range would suffice.

Thanks

Tue, 04/09/2019 - 14:36

LabJack Support

The U6/T7 families have

The U6/T7 families have microvolt resolution so would probably do what you need directly, but best you can do on the U3-HV is use a low voltage analog input (FIO4-EIO7) which has a resolution of about 600 uV. So you need to decide how big a resistor you can put on your signal, and then likely you will need an amp to make the voltage bigger:

https://labjack.com/support/app-notes/amplifying-small-signal-voltages