4 replies to this topic

[IzzIrfan86]

Hi!

I bought an fx-570EX clone a little while ago, can you guys see the difference?

Would love to see your opinions too!

Is there any of test you would like me to do? Please do reply. Thank you

Edited by IzzIrfan86, 01 June 2020 - 11:32 AM.

[IzzIrfan86]

The things I noticed:

1. It is 2 to 3 times slower than the original, maybe I'll bring in an ES PLUS to test against it

2. The QR Code generated by the calculator for any calculations is fake, unscannable and is the same

3. The authenticity test doesn't generate any QR Code

4. The screen refreshes at a slower rate than the original

5. The answers calculated are sometimes differ by several digits

Edited by IzzIrfan86, 01 June 2020 - 10:29 AM.

[CalcLoverHK]

@IzzIrfan86:
Though I can't help you (I don't have this calc), but wow you are a 4-year-old user in this forum. I just looked up your old topic about fx-570s and it ages 4 years O_o.

[siealex]

Try the following test on both calculators (in DEG mode):

 

Arcsin(Arccos(Arctan(tan(cos(sin(9))))))-9 

 

and post the result. 

[IzzIrfan86]

Try the following test on both calculators (in DEG mode):

 

Arcsin(Arccos(Arctan(tan(cos(sin(9))))))-9 

 

and post the result. 

Clone: 8.999999998 (internally 8.999999998078897) (16 digits(?))

Original: 9.000000007 (internally 9.00000000733338)