- #1
Jamison Lahman
- 143
- 35
Hello,
I recently did the Franck-Hertz experiment (a short summary of the experiment can be found here http://inpp.ohiou.edu/~roche/3701_web/man-fh-a3b.pdf).
I am currently doing data analysis and am having a hard time determining the accuracy of the oscilloscope, the Tektronix TDS2004B. I am fairly certain it was a DC current and according to page 131 of the manual (found here: http://inpp.ohiou.edu/~roche/3701_web/tektronix-tds.pdf) the accuracy of a DC reading is ±(3% × reading + 0.1 div + 1 mV).
My voltages range from 12V-65V so the precision of the smaller measurements is about 5x that of higher measurements? Additionally, I'm plotting current as a function of voltage and I can't find any mention of accuracy of current measurements. Am I supposed to assume current measurements are also within 3% according to Ohm's Law? I don't know exactly how oscilloscopes work, but I was under the impression they have many capacitors and transistors to get very high impedances so I am skeptical the assumption is applicable. Any guidance is appreciated. Thanks. (If any over information is important, let me know.)
I recently did the Franck-Hertz experiment (a short summary of the experiment can be found here http://inpp.ohiou.edu/~roche/3701_web/man-fh-a3b.pdf).
I am currently doing data analysis and am having a hard time determining the accuracy of the oscilloscope, the Tektronix TDS2004B. I am fairly certain it was a DC current and according to page 131 of the manual (found here: http://inpp.ohiou.edu/~roche/3701_web/tektronix-tds.pdf) the accuracy of a DC reading is ±(3% × reading + 0.1 div + 1 mV).
My voltages range from 12V-65V so the precision of the smaller measurements is about 5x that of higher measurements? Additionally, I'm plotting current as a function of voltage and I can't find any mention of accuracy of current measurements. Am I supposed to assume current measurements are also within 3% according to Ohm's Law? I don't know exactly how oscilloscopes work, but I was under the impression they have many capacitors and transistors to get very high impedances so I am skeptical the assumption is applicable. Any guidance is appreciated. Thanks. (If any over information is important, let me know.)