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Instructions to perform the DC test.

1 – Clear the calculator display by hitting AC key.
2 – Turn Multimeter on DC with lowest reading.
Important: An automatic model is required for the reasons explained above. If other model is used, you probably won’t get the results I got.
3 – Insert the negative lead right under the calculator from its front side, between the adhesive spacings.
4 – Hold the examiner the usual way but with the index finger positioned above it to avoid movement and at the same time using your middle finger and thumb position the read probe lead in contact with handle close to the bottom of box as shown in the picture.

5- Look at the multimeter display, It should be displaying a negative voltage or a low positive one.
I did this many times and there are variations.
6 – Enter any ramdom value in calculator. Eg. 98746
7 – You will see a quick rise in voltages happening.
8 – Now gently touch any numbered keypad. You will see this voltage lowering fast. Release your finger and voltage build up again.