Dear Mahdi,

You need impedance spectrometr to perform the impedance spectroscopy measurements. The oscilloscope and a function Generator are not enough.

You can measure the voltage by  a oscilloscope. You also neen to measure the current. So you need current resistor. Theoretically it is possible, but in practice it is difficult.  

 Valeriy Martynyuk

Thanks for your reply Do you have any Instruction for Experiment with oscilloscope ?

if you have , it would be appreciated to send me.

Thanks.

Hi Mahdi.

I have enclosed two attachments on Electrochemical impedance Spectroscopy for you, this might be of interest to you. See PDF Attachments:

Dr. Abdul Kadir

Method and concept is Clear . My question was , how can i do Impedance spectroscopy just with a oscilloscope and a function Generator.

Do You have another guidance about it?

BR

Mahdi

Dear Mahdi,

You can use the block diagram as it is presented in my paper (see Figure 4. The measurement structure of superhigh capacitance analyzer). But you need vector voltmeter  to  measure the real and imaginary parts both voltage and current. If you can measure the phase shift between voltage on your battery and current through it then you  also to calculate   the real and imaginary parts both voltage and current for different frequency of your sinisoidal signals.

When you can perform measurements, please inform me about  it.

May be you will find another  solut.ion. It will be interesting for me also.

Best regards,

Valeriy

Dear Valeriy

Thanks for your Guidance about spectrometry. I try to implement the method.and if i found better i will inform you about it.

BR

Mahdi

Dear Artur

Thanks for your Response. do you have the mentioned paper??

Best regards

Mahdi

Good luck Mahdi

Dear Valeriy

i started measurement with help of oscilloscope and AC function generator.

i have good response about frequency and current . But voltage measurement is constant and fast equal with voltage of battery and would show a DC value.

i considered that you told me in your last post about Current Resistor. Where can i install it? Is it necessary?

please pay attention that i produced a AC Voltage with Function Generator and not AC Current.

you can find single line diagram of my test method.

Dear Mahdi,

You should use current resistor to measure the current.

I see the current mesurement at your diagram.  You measure the voltage drop on the current resistor that is conectted in serial with your  battery. I=Ucurrent resitor/Rcurrent resitor.  Than Z=Ufunction Generator / Icurrent resitor

You should use the short input in your osciloscope to avoid DC voltage.

What the vcoltage amplitude value do you use  in your function Generator ?

What the current value did you obtain?

Dear Valeriy

In this sentence “You should use the short input in your oscilloscope to avoid DC voltage“, what do you mean about short input in your oscilloscope?

 I tried to implement impedance spectroscopy with amplitude 4V and 10V. And the Current value was about 3 mA.

My function Generator‘s Photo is in attachment.

Can you please tell me, in order to integration of a current resistance, which figure is right in attachment? Figure 1 or 2?

how much should be Current resistance ? what is your recommendation?

Dear Mahdi,

Osciloscope has two modes of its inputs.

First is the open input. This input can measure DC and AC voltages.

Second is the close input. ( input is conectted with a serial capacitor).

In this case you can measure only AC voltage.

I mean the close input not a short input. Sorry it was my mistake.

You should use only the close inputs in your osciloscope to avoid DC voltage.

You should use 4 mV not 4 V because if you use 4V bettery wil charge and in this nmode it has the nonlinear parameters ( when the parameter is depended of the input voltage).

About integration of the current resistor see attched Block diagram

Dear Usman

please look at my questiom again . i can provide just a oscilloscope and a function Generator.

BR

hello Mahdi Doustmohammadi , hope your research going well.

can you inform me what you end with in this question? i mean if you implement impedance spectroscopy using function generator and oscilloscope?

i have the same challenge but iam working on electrochemical biosensor ,

in my lab i have NI ELVIS which is a function generator and oscilloscope connected with computer and using Labview i can filler or amplify the signal ,

i dont know if i can using this tool do impedance spectroscopy.