1. مقدمه
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.
شکل 1: جلو view of the Sharp EL339HB Semi-Desk Executive Calculator, showing the 12-digit display and key layout.
۲. راهاندازی و برق
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 استفاده اولیه
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 خاموش شدن خودکار
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 کلید
۳.۲ تنظیم پایه
برای بهینه 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.
شکل 2: عقب view of the calculator showing the adjustable kickstand for ergonomic viewing.
3. دستورالعمل های عملیاتی
This section details the various functions and operations of the Sharp EL339HB calculator.
۳.۱ عملیات حسابی پایه
اعداد را با استفاده از صفحه کلید عددی وارد کنید. از + (علاوه بر این)، - (تفریق)، x (ضرب) و ÷ (division) keys for calculations. Press = برای نمایش نتیجه
- 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.
۴.۴ عملکردهای حافظه
The calculator includes a four-key memory system:
- M+: مقدار نمایش داده شده را به حافظه اضافه میکند.
- M-: مقدار نمایش داده شده را از حافظه کم میکند.
- RM: Recalls the value stored in memory to the display.
- CM: حافظه را پاک میکند.
3.3 توابع ویژه
- 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 محاسبات
- +/-: 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: نقطه اعشار شناور.
- 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.
ویدئو ۱: محصول تمام شدview demonstrating key features and operation of the Sharp EL339HB calculator.
4. تعمیر و نگهداری
4.1 تمیز کردن
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 تعویض باتری
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 عیب یابی
| مشکل | علت احتمالی | راه حل |
|---|---|---|
| صفحه نمایش خالی یا کم نور است. | 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. |
| نتایج محاسبات نادرست. | Incorrect key input, or incorrect decimal setting. | را فشار دهید 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. مشخصات
- برند: شارپ
- مدل: SHREL339HB
- رنگ: خاکستری
- نوع ماشین حساب: مالی
- نمایش: 12-Digit Liquid Crystal Display (LCD)
- منبع تغذیه: Solar Powered with Battery Backup (1 Product Specific battery included)
- ابعاد محصول: 10.2 x 6.3 x 1 اینچ
- وزن مورد: 3.52 اونس
- ویژگی ها: Four-key memory, Grand Total, Cost/Sell/Margin, Percent, Sign Change, Answer Check, Low-noise keyboard, Metal case, Kickstand.
7. گارانتی و پشتیبانی
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.
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