MAUL MJ 450 Pocket Calculator - Operating Instructions
Introduction
This document provides operating instructions for the MAUL MJ 450 pocket calculator.
Example Calculations
The following examples demonstrate common operations and their results:
Basic Arithmetic
| Example | Operation (Button Presses) | Display |
|---|---|---|
| 2 + 3 - 1 = 4 | [2] [+] [3] [-] [1] [=] | 4 |
| 2 x (3 + 4) - 5 = 9 | [2] [x] [(] [3] [+] [4] [)] [-] [5] [=] | 9 |
| 3 x 2.54 = 7.62 | [3] [x] [2] [.] [5] [4] [=] | 7.62 |
| 4 x 3 = 12 | [4] [x] [3] [=] | 12 |
| 4 x 5 = 20 | [4] [x] [5] [=] | 20 |
| 6 : 2 = 3 | [6] [:] [2] [=] | 3 |
| 8 : 2 = 4 | [8] [:] [2] [=] | 4 |
Percentage Calculations
| Example | Operation (Button Presses) | Display |
|---|---|---|
| 10 + 5% = 10.5 | [10] [+] [5] [%] [=] | 10.5 |
| 10 - 5% = 9.5 | [10] [-] [5] [%] [=] | 9.5 |
| 10 x 5% = 0.5 | [10] [x] [5] [%] [=] | 0.5 |
| 10 ÷ 5% = 200 | [10] [÷] [5] [%] [=] | 200 |
| 20 x (1 + 15%) = 23 | [20] [x] [(] [1] [+] [15] [%] [)] [=] | 23 |
| 20 x (1 - 15%) = 17 | [20] [x] [(] [1] [-] [15] [%] [)] [=] | 17 |
Memory Functions
| Example | Operation (Button Presses) | Display |
|---|---|---|
| Memory Plus | [2] [x] [3] [M+] | 6 |
| Memory Minus | [3] [x] [4] [M-] | 12 |
| Memory Plus | [4] [x] [5] [M+] | 20 |
| Memory Recall | [MRC] | 14 |
Square Root
| Example | Operation (Button Presses) | Display |
|---|---|---|
| √9 = 3 | [√] [9] [=] | 3 |
| √144 = 12 | [√] [1] [4] [4] [=] | 12 |
| √(3² + 4²) = 5 | [√] [(] [3] [x] [3] [+] [4] [x] [4] [)] [=] | 5 |
Division
| Example | Operation (Button Presses) | Display |
|---|---|---|
| 1 / 4 = 0.25 | [1] [÷] [4] [=] | 0.25 |
Key Operations
Understand the functions of each button:
- ON/C: Power On / Clear. Press to turn the calculator on or clear all entries and memory.
- CE: Clear Error. Press to clear the last entry or error.
- Number Keys (0-9): Input numerical values.
- Function Keys (+, -, x, ÷, =, √, %): Perform arithmetic operations, calculate square roots, and percentages.
- M+ (Memory Plus): Adds the displayed value to the independent memory.
- M- (Memory Minus): Subtracts the displayed value from the independent memory.
- MRC (Memory Recall / Memory Clear): Press once to recall the value stored in memory. Press twice to clear the memory.
LCD Display
The LCD screen provides information:
- M (MEMORY): Indicates that a value is stored in the independent memory.
- (- MINUS): Shows a negative sign for negative numbers.
- E (ERROR): Appears when the result exceeds the maximum number of digits that can be displayed, or if an invalid operation is performed. Press ON/C to clear.
Battery Replacement
This calculator uses two power sources: solar energy and a 1.5V battery. The calculator features an auto power-off function after approximately 10 minutes.
If the display becomes blurred, it indicates the battery is low. You can use the solar panel for power or replace the battery to restore display clarity.
Warranty Information
MAUL products are manufactured with care and adhere to strict quality guidelines. The materials and manufacturing process undergo constant testing.
The guarantee is valid for five years and covers repair of manufacturing or material defects. The warranty period begins on the day of sale to the first user, with proof of purchase (receipt or bill) required.
Damage due to improper handling, mechanical damage, natural wear and tear, or battery issues (if supplied) is excluded from the guarantee. Tampering by unauthorized parties also voids the warranty. Consequential damages are not covered.
Complaints for recognizable defects must be reported within fourteen days of receipt. Hidden defects should be notified immediately upon discovery. Goods justly rejected will be repaired. If a defect is not eliminated within a reasonable period, the buyer may withdraw from the contract.
For warranty claims, please forward the device with the receipt to the point of sale. Include your name, address, and a description of the defect. Repairs or replacements outside the warranty period are possible at the customer's expense.
These conditions do not exclude the application of EU provisions.
