ຄູ່ມືການໃຊ້ເຄື່ອງຄິດເລກ Sharp EL-145T BL

1. ບົດແນະນຳ

This manual provides detailed instructions for the proper use and maintenance of your Sharp EL-145T BL 14-digit desktop calculator. Designed for office tasks, this calculator features tax calculation, percentage calculation, root calculation, and a 4-key memory system. It operates using both solar power and a backup battery, ensuring reliable performance.

Please read this manual thoroughly before using the calculator to ensure optimal performance and longevity.

2. ຂໍ້ມູນຄວາມປອດໄພ

• Do not expose the calculator to direct sunlight for extended periods or to extreme temperatures.
• Avoid dropping the calculator or subjecting it to strong impacts.
• Keep the calculator away from water and other liquids.
• Do not attempt to disassemble or modify the calculator. Refer all servicing to qualified personnel.
• ຖິ້ມແບດເຕີລີ່ຕາມກົດລະບຽບທ້ອງຖິ່ນ.

3. ຜະລິດຕະພັນເກີນview

The Sharp EL-145T BL is a compact and efficient 14-digit desktop calculator. Its angled LCD display enhances readability, making it suitable for various calculations.

ຮູບທີ 1: ດ້ານໜ້າ view of the Sharp EL-145T BL calculator, showing the 14-digit display, solar panel, and key layout. The calculator features a black body with blue accents.

ຄຸນ​ນະ​ສົມ​ບັດ​ທີ່​ສໍາ​ຄັນ​:

• 14-digit angled LCD display for clear viewing.
• Dual power source: Solar and battery (1 x LR-54/LR44).
• Dedicated tax calculation keys (+TAX, -TAX, RATE SET, RATE RECALL).
• ເປີເຊັນtage calculation function (%).
• Square root calculation (√).
• 4-key memory functions (M+, M-, RM, CM).
• Clear Entry (CE) and All Clear (CA/C) keys.

ອົງປະກອບ:

The calculator consists of a main unit with a display panel, a solar panel, and a keypad. The keypad includes numeric keys (0-9, .), arithmetic operation keys (+, -, ×, ÷, =), and special function keys.

ຮູບທີ 2: The Sharp EL-145T BL calculator positioned on a wooden desk, demonstrating its compact size and suitability for office environments. A highlighter and sticky note are visible nearby.

4. ຕັ້ງຄ່າ

ແຫຼ່ງພະລັງງານ:

The EL-145T BL calculator is designed for dual power operation:

• ພະລັງງານແສງຕາເວັນ: The calculator primarily operates on solar power when sufficient light is available. Ensure the solar panel (located above the display) is exposed to light.
• ພະລັງງານຫມໍ້ໄຟ: A backup battery (1 x LR-54 or LR44) is included to provide power in low-light conditions.

ການຕິດຕັ້ງ/ປ່ຽນແບັດເຕີລີ:

1. Ensure the calculator is turned off or in a well-lit area to utilize solar power.
2. ຊອກຫາຝາປິດຊ່ອງໃສ່ຫມໍ້ໄຟຢູ່ດ້ານຫຼັງຂອງເຄື່ອງຄິດເລກ.
3. ເອົາຝາປິດອອກຢ່າງລະມັດລະວັງ.
4. Insert a new LR-54 or LR44 battery, ensuring the correct polarity (+/-) as indicated inside the compartment.
5. ປ່ຽນຝາປິດຊ່ອງໃສ່ຫມໍ້ໄຟໃຫ້ປອດໄພ.

Note: The calculator may power on automatically once sufficient light or battery power is detected.

5. ຄໍາແນະນໍາການດໍາເນີນງານ

ການ​ດໍາ​ເນີນ​ງານ​ເລກ​ຄະ​ນິດ​ພື້ນ​ຖານ​:

Enter numbers and use the standard arithmetic keys (+, -, ×, ÷) followed by the equals key (=) to perform calculations.

• ເພີ່ມ: [Number 1] [+] [Number 2] [=]
• ການຫັກລົບ: [Number 1] [-] [Number 2] [=]
• ການຄູນ: [Number 1] [×] [Number 2] [=]
• ພະແນກ: [Number 1] [÷] [Number 2] [=]

Clear Functions:

• [CA/C] (All Clear): ລຶບລ້າງລາຍການ ແລະ ໜ່ວຍຄວາມຈຳທັງໝົດ, ຕັ້ງຄ່າເຄື່ອງຄິດເລກຄືນໃໝ່.
• [CE] (Clear Entry): Clears the last entered number or the current calculation result without affecting previous entries or memory.

ເປີເຊັນtage ການ​ຄິດ​ໄລ່​:

ເພື່ອຄິດໄລ່ເປີເຊັນtages, use the [%] ກະແຈ.

• Example: Calculate 15% of 200.
  ເຂົ້າ [200] [×] [15] [%]. The result will be 30.
• Example: Add 15% to 200.
  ເຂົ້າ [200] [+] [15] [%]. The result will be 230.

ການຄິດໄລ່ພາສີ:

The calculator features dedicated keys for tax calculations. First, set the tax rate.

1. Setting the Tax Rate:
   Enter the tax rate (e.g., [8] for 8%). Press [RATE SET]. The tax rate is now stored.
2. Adding Tax:
   Enter the amount (e.g., [100]). ກົດ [+TAX]. The display will show the amount with tax added.
3. Subtracting Tax:
   Enter the amount (e.g., [108]). ກົດ [-TAX]. The display will show the amount with tax removed.
4. ການເອີ້ນຄືນອັດຕາພາສີ:
   ກົດ [RATE RECALL] ກັບ view ອັດຕາພາສີທີ່ກໍານົດໄວ້ໃນປັດຈຸບັນ.

ຟັງຊັນຄວາມຈໍາ:

The 4-key memory allows you to store and recall values.

• [M+] (Memory Plus): ເພີ່ມຄ່າທີ່ສະແດງໃຫ້ກັບຫນ່ວຍຄວາມຈໍາ.
• [M-] (Memory Minus): ລົບຄ່າທີ່ສະແດງອອກຈາກຫນ່ວຍຄວາມຈໍາ.
• [RM] (Recall Memory): Displays the value currently stored in memory.
• [CM] (Clear Memory): Clears the memory content. (Often combined with RM, pressing RM twice clears memory).

ການຄິດໄລ່ຮາກສີ່ຫລ່ຽມ:

To calculate the square root of a number, enter the number and then press the [√] ກະແຈ.

• Example: Calculate the square root of 81.
  ເຂົ້າ [81] [√]. The result will be 9.

6. ບໍາລຸງຮັກສາ

• ທໍາຄວາມສະອາດ: Use a soft, dry cloth to clean the calculator's exterior. For stubborn dirt, slightly dampen the cloth with water and a mild detergent, then wipe dry immediately. Do not use abrasive cleaners or solvents.
• ການເກັບຮັກສາ: When not in use for extended periods, store the calculator in a cool, dry place away from direct sunlight and extreme temperatures.
• ຊີວິດຫມໍ້ໄຟ: The battery life is approximately 2 years when used for 1 hour per day under solar power. Replace the battery when the display becomes dim or erratic in low light.

7. ການແກ້ໄຂບັນຫາ

8. ຂໍ້ມູນຈໍາເພາະ

9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ

Sharp products are manufactured to high-quality standards. For specific warranty information, please refer to the warranty card included with your purchase or contact your local Sharp customer support. Keep your purchase receipt as proof of purchase.

For further assistance or inquiries, please visit the official Sharp webເວັບໄຊ ຫຼືຕິດຕໍ່ພະແນກບໍລິການລູກຄ້າຂອງເຂົາເຈົ້າ.