Electronic Calculator
Operation Instructions
Features
- Battery and solar powered calculator.
- 12-digit FEM liquid crystal display.
- Algebraic mode.
- Auto-power-off function.
- 2 keys roll-over function.
- Tax calculation.
- 99/112 Steps check & correct function
Key/Switch/Symbols Identifications
| Key/Symbol | Function |
|---|---|
| [ON/AC] | Power on/all clear key |
| [CE/C] | Clear entry key/Clear key |
| [M+] | Memory plus key |
| [M-] | Memory minus key |
| [MRC] | Memory recall key/clear key |
| [MU] | Mark-up key |
| [00] | Double zero key |
| [√] | Square root key |
| [REPLAY] | Auto replay key |
| [CHECK] | Step by step check key (forward a → b → c = d) |
| [CHECK] | Step by step check key (forward a - b + c = d) |
| [CORRECT] | Correction key/Shift-right key |
| [M] | Memory loaded |
| [E] | Overflow-error |
| [SET] | Set rate/Percent key |
| [TAX+] | Amount with tax |
| [TAX-] | Amount without tax |
| [TAX] | TAX |
| [TAX%] | Tax rate |
Changing Battery
This unit runs by 1 L1131(AG-10) battery and solar cell. The battery will sustain long life. If the display grows dim, the battery needs to be replaced. Remove the battery from the lower cabinet. Replace the old battery and insert the new battery in the indicated polarity.
Notes
i) The unit has a 99/112 step replay memory capacity which is useful to check the process of the calculation. If a mis-input is found, it can be corrected.
ii) If the calculation becomes more than 99/112 steps, it is indicated in the display by flashing "99/112" on the left side of the LCD. Further calculation can be continued but not stored in replay memory.
Operation Examples
Check & Correct
Example: 10x3+5x2=40
| KEY Operation | Display |
|---|---|
| 10 [x] 3 [M+] | M 30. |
| 5 [x] 22 [M+] | M 110. |
| [REPLAY] | M 110. |
| [CHECK] | 01 |
| [ON/AC] | 0. |
Example: (100+200-50)x3 = 750
| KEY Operation | Display |
|---|---|
| 100 [+] 200 [+] 50 [-] [=] | 350. |
| [x] 3 [=] | 1050. |
| [CHECK] | 02 |
| [CORRECT] | 02 |
| [REPLAY] | 05 |
| [ON/AC] | 0. |
| [CHECK] | 03 |
| [REPLAY] | 07 |
| [ON/AC] | 0. |
TAX Calculation
Example: Cost is $120 with 8% Tax
| KEY Operation | Display | |
|---|---|---|
| 120. [TAX+] | 129.6 | |
| [CHECK] | 02 | |
| [REPLAY] | 05 | |
| [CORRECT] | 02 | |
| [REPLAY] | 05 | |
| Cost is $129.6 | 129.6 [TAX-] | 120. |
| [CHECK] | 03 | |
| [REPLAY] | 05 | |
| [CORRECT] | 02 | |
| [REPLAY] | 05 | |
| Check tax rate | [SET](PUSH FOR 3"SEC) TAX% | 8 |
| [CHECK] | 03 | |
| [REPLAY] | 07 | |
| [ON/AC] | 0. |
Mark-up
Example: 2000 + (P x 20%) = P => P = 2500
| KEY Operation | Display |
|---|---|
| 2000 [MU] | 2000.MU |
| 20 [%] | 2500.% |
| [=] | 500. = |
| [ON/AC] | 0. |