Casio fx-83ES (Natural Display)
The Casio fx-83ES is a scientific calculator with 10 digits precision and formula input logic. It has 249 functions, 50 keys, and an LCD (liquid crystal) display. The power source is a single AAA battery. The calculator was manufactured in China. Note: Bump in case to accomodate relatively large AAA battery
A sample of this calculator is held in the calculator.org collection.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Functions | 249 |
| Keys | 50 |
| Precision | 10 |
| Logic | Formula |
| Display type | LCD |
| Display size | 96 |
| Length | 160mm |
| Width | 80mm |
| Thickness | 14mm |
| Weight | 110g |
| Power Consumption | 0.000200W |
| Power Source | a single AAA battery |
| Country | China |
| Original price | $10 |
| Est. current value | $8 |
| Year introduced | 2005 |
| Year discontinued | 2010 |
User Manual
You can download the Casio fx-83ES manual from the manuals website. If this doesn't work, you can also try this alternative download link.
Diagnostics
Note that diagnostic tests generally delete any data on the calculator. Be sure to back up any important information held in the calculator before running these tests.
While holding SHIFT and 7 keys (or just SHIFT key for early models) press the ON key. Pressing the SHIFT key shows 5 display test patterns in turn, followed by the ROM version. Press AC to get the contrast test screen, and press AC again to get to the keypad test - the numbers then increase as each key is pressed in the correct order (omitting the ON key which exits test mode).
Replacements:
If you have a Casio fx-83ES that is no longer working, you can first try replacing the a single AAA battery. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: