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I am trying to use SR810 lock amplifier at scientific experintal.
I need to apply the signal from SINE OUT BNC output in a thin ceramic sample. My sample is an plane disk with electrodes in opposite faces. This sample is isolante material, but sometimes the voltage can damage the sample and cause a short circuit between the electrodes and also a short circuit between pin signal e GND from SINE OUT BNC. I need 5Vrms from Lockin.
My question: 1) How can I protect SR850 not modify or affect my overall result? 2) Can I put an resitor 10Mohm in serie with my sample for to limite electrical current? For exemplo: [signal pin]-----{resistor 10M}-----{sample}-----[GND]
3)This circuit would change my results if the sample remain undamaged?
What does this question have to do with LabVIEW or other NI products?
The questions you ask cannot be answered without knowledge of your samples and the types of measurements you are making. How much current can your sample withstand? How much voltage does it take to damage the sample? What is the input impedance of the measuring circuit? What are the frequencies and bandwidths involved? Is it possible that the samples are defective before the voltage is applied?
