I am trying to figure out the zener voltage of 1n4742a zener diode. I constructed the following circuit:
The data sheet of the diode can be found here: http://download.siliconexpert.com/pdfs/2016/8/24/2/35/11/334/gda_/manual/21n47xx.pdf
I measured the voltage across the diode and the current through it, and I stopped at the point where the current going through it was 67.5 mA and the voltage was 13.453 V.
The data sheet states that the zener voltage is 12 v however here I have about 12% discrepancy. Is that usual? or is there something wrong with the way I am doing it. I did not further increase the voltage source, because I am afraid it will destroy the diode, so is there a better way to measure the zener voltage?