How to check original Casio fx-991ex plus
There are several ways to check your calculator original or duplicate. But if you follow the following steps, you can easily know whether the calculator you are using is original or duplicate.
How to check calculator is original
Today's article is about how to check original scientific calculator. There are four things you need to do to know if the calculator in your hand is original or duplicate.
Turning off the Calculator
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| How to check original scientific calculator |
When you turn off your hand calculator (press SHIFT + AC to turn it off), if "CASIO" appears on the calculator screen, then you will know that your calculator is original. And if "CASIO" is not written, then you will understand that the calculator is duplicate.
Doing DIAGNOSTIC
First turn on the calculator. Then pressing the (SHIFT+7+ON) button together will show “DIAGNOSTIC”.
Then if the eight (8) button is pressed then many options will appear (as shown in the image below).
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| How to check original scientific calculator |
If you press the numbers that appear on the screen (like I pressed the first 2 numbers 1 and 5) if they turn black (like the picture below), then you will know that your calculator is original.
By scanning QR Code
It is easy to understand whether a calculator is original or duplicate by scanning the QR Code. "CASIO fx-991ES PLUS" calculator needs to be scanned in two ways.
Step 1
The calculator you buy will have a QR code on its packet Scan the QR code. As a result, if you get a white color tick mark in the blue circle , then you will know that your calculator is original .
Step 2
You turn on your calculator first. Then you will see a button named "SETUP" next to the "ON" button, you will press the "SETUP" button so then press the zero "0", then you can see a QR code will appear on the screen of your calculator. Then scan the QR code as before. Then you can understand whether your calculator is original or duplicate.
Pressing and holding the ON button
If you take your "CASIO fx-991ES PLUS" calculator by hand and press the "ON" button and press the other buttons of the calculator, if all the other buttons work properly, then you will understand that your calculator is original. And if it doesn't work then you know your calculator is duplicate.
