1. Introduction
The Sharp EL339HB is a semi-desk executive calculator designed for efficient and precise calculations. It features an extra-large, 12-digit liquid crystal display (LCD) with punctuation for enhanced readability. Built with a durable metal case and a low-noise keyboard, this calculator is ideal for professional environments. Its dual power source (solar with battery backup) ensures reliable operation.
Key functions include a four-key memory system (memory plus, memory minus, recall memory, and clear memory), grand total key, cost/sell/margin calculations, percent key, sign change key, and an answer check feature. The integrated kickstand provides flexible viewing angles for user comfort.
Figure 1: Front view of the Sharp EL339HB Semi-Desk Executive Calculator, showing the 12-digit display and key layout.
2. Setup and Power
The Sharp EL339HB calculator operates on a dual power system: solar power and battery backup. This ensures continuous operation even in varying light conditions.
2.1 Initial Use
Upon first use, ensure the calculator is exposed to sufficient light for the solar panel to activate. If the display does not immediately appear, press the ON/C·CE key. The calculator is ready for use when "0." appears on the display.
2.2 Automatic Power Off
To conserve power, the calculator features an automatic power-off function. It will turn off after approximately 7 minutes of inactivity. To reactivate, simply press the ON/C·CE key.
2.3 Kickstand Adjustment
For optimal viewing, the calculator is equipped with a kickstand on its rear. Gently pull out the kickstand to prop the calculator at an angle. Push it back in when not needed for flat storage.
Figure 2: Rear view of the calculator showing the adjustable kickstand for ergonomic viewing.
3. Operating Instructions
This section details the various functions and operations of the Sharp EL339HB calculator.
3.1 Basic Arithmetic Operations
Enter numbers using the numeric keypad. Use the + (addition), - (subtraction), x (multiplication), and ÷ (division) keys for calculations. Press = to display the result.
- ON/C·CE: Turns the calculator on. When on, acts as Clear Entry (clears the last entered number) with a single press, and Clear All (clears all calculations and memory) with a double press.
- CA: Clear All. Clears all entries and memory.
3.2 Memory Functions
The calculator includes a four-key memory system:
- M+: Adds the displayed value to the memory.
- M-: Subtracts the displayed value from the memory.
- RM: Recalls the value stored in memory to the display.
- CM: Clears the memory.
3.3 Special Functions
- GT: Grand Total. Accumulates the results of all calculations. Pressing GT displays the accumulated total.
- COST/SELL/MGN: These keys are used for cost, selling price, and margin calculations. Refer to the detailed user manual for specific sequences.
- %: Percent key. Used for percentage calculations.
- +/-: Sign Change key. Changes the sign of the displayed number (positive to negative, or negative to positive).
- ANSWER CHECK: Allows you to verify previous calculations.
3.4 Decimal Point Settings
The calculator offers various decimal point settings, typically controlled by a slider switch:
- F: Floating decimal point.
- 3, 2, 1, 0: Fixed decimal places (3, 2, 1, or 0 digits after the decimal point).
- A: Add mode (automatically adds decimal point for currency calculations).
Additionally, there is a "5/4" switch which controls rounding up or down for fixed decimal settings.
Video 1: Product Overview demonstrating key features and operation of the Sharp EL339HB calculator.
4. Maintenance
4.1 Cleaning
To maintain the calculator's appearance and functionality, wipe the surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the calculator in water.
4.2 Battery Replacement
The calculator includes a battery backup. If the display becomes dim or unresponsive in adequate light, the battery may need replacement. The battery compartment is located on the back of the unit. Refer to the full user manual for detailed instructions on how to safely replace the battery. Use only the specified battery type.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Insufficient light for solar panel, or low battery. | Ensure the calculator is in a well-lit area. If the problem persists, replace the battery. |
| Calculator does not turn off with a dedicated key. | This model features an automatic power-off function. | The calculator will automatically turn off after approximately 7 minutes of inactivity. This is normal operation. |
| Incorrect calculation results. | Incorrect key input, or incorrect decimal setting. | Press CA to clear all entries and memory, then re-enter the calculation. Check the decimal point setting switch (F, 3, 2, 1, 0, A) and the 5/4 rounding switch. |
6. Specifications
- Brand: Sharp
- Model: SHREL339HB
- Color: Grey
- Calculator Type: Financial
- Display: 12-Digit Liquid Crystal Display (LCD)
- Power Source: Solar Powered with Battery Backup (1 Product Specific battery included)
- Product Dimensions: 10.2 x 6.3 x 1 inches
- Item Weight: 3.52 ounces
- Features: Four-key memory, Grand Total, Cost/Sell/Margin, Percent, Sign Change, Answer Check, Low-noise keyboard, Metal case, Kickstand.
7. Warranty and Support
For detailed warranty information, please refer to the documentation included with your product or visit the official Sharp website. For technical support or service inquiries, please contact Sharp customer service.
An official user manual in PDF format is available for download: Download User Manual (PDF).
