Comix Desktop Calculator C-2735 User Manual

1. Introduction

This manual provides detailed instructions for the Comix Desktop Calculator C-2735. Please read this manual thoroughly before using the calculator to ensure proper operation and to maximize its features. This calculator is designed for general arithmetic calculations and is suitable for office, home, and school use.

Image 1: Comix Desktop Calculator C-2735. This image displays the calculator from a slightly elevated angle, showcasing its large display, computer-style keys, and champagne gold panel.

2. Product Overview

The Comix C-2735 is a desktop calculator featuring a 12-digit display and large, comfortable computer-style keys. It operates on dual power (solar and battery) for reliable performance.

Key Features:

• 12-Digit Large LCD Display: Provides clear visibility for large calculations.
• Computer Keys Design: Offers a comfortable and responsive tactile experience.
• Dual Power Source: Functions with both solar energy and one AA battery (included). The solar panel acts as an auxiliary power source, and an AA battery is recommended for optimal display clarity.
• Durable Construction: Features a champagne gold color panel with a metal overlay for enhanced durability and aesthetic appeal.
• Anti-Slip Mat: Equipped with four anti-slip mats on the base to ensure stability on any desktop surface.

Component Identification:

Image 2: Labeled components of the Comix C-2735 calculator. This diagram highlights the 12-digit display, extraction function, general total (GT), clear screen (C/CE), clear all (AC), margin account (MU), memory load/clear (MR), and memory function (M+, M-).

1. 12 Digits Display: Shows numbers and calculation results.
2. Extraction Function (√): Calculates the square root of a number.
3. General Total (GT): Recalls the grand total of all calculations.
4. Clear the Screen (C/CE): Clears the last entry or the current display.
5. Clear All (AC): Clears all entries and resets the calculator.
6. Margin Account (MU): Used for profit margin calculations.
7. Memory Load/Clear (MR): Recalls the value stored in memory. Pressing twice clears the memory.
8. Memory Function (M+, M-): Adds to memory (M+) or subtracts from memory (M-).
9. Percentage (%): Performs percentage calculations.
10. Decimal Selector (F 4 2 0 A): Selects the number of decimal places or floating decimal.
11. Rounding Selector (UP 5/4 CUT): Sets rounding mode (round up, 5/4 round, cut off).

3. Setup

Power Source:

The Comix C-2735 calculator utilizes a dual power system: solar and battery.

• Solar Power: The calculator is equipped with a solar panel that functions as an auxiliary power source. For optimal performance, especially in low light conditions, ensure the calculator is exposed to sufficient light.
• Battery Power: One AA battery is required and included in the package. It is highly recommended to install the AA battery for a clearer and more consistent display, as solar power alone may not always provide sufficient energy for full display clarity.

Battery Installation:

1. Locate the battery compartment on the back of the calculator.
2. Open the battery compartment cover.
3. Insert one AA battery, ensuring the correct polarity (+/-) as indicated inside the compartment.
4. Close the battery compartment cover securely.

Image 3: Illustration of the dual power system and battery installation for the Comix C-2735 calculator. This image shows the solar panel and the AA battery compartment with an AA battery inserted.

4. Operating Instructions

Basic Calculations:

• Addition (+): Enter the first number, press +, enter the second number, then press =.
• Subtraction (-): Enter the first number, press -, enter the second number, then press =.
• Multiplication (×): Enter the first number, press ×, enter the second number, then press =.
• Division (÷): Enter the first number, press ÷, enter the second number, then press =.
• Decimal Point (.): Use the . key for decimal numbers.
• Double Zero (00): Use the 00 key for quick entry of two zeros.

Memory Functions:

• M+ (Memory Plus): Adds the displayed value to the memory.
• M- (Memory Minus): Subtracts the displayed value from the memory.
• MR (Memory Recall): Recalls the value currently stored in memory.
• MC (Memory Clear): Clears the memory. (Note: On some calculators, MR pressed twice clears memory. Refer to the diagram for specific key functions.)

Special Functions:

• % (Percentage): Used for percentage calculations. For example, to calculate 10% of 200: enter 200 × 10 %.
• √ (Square Root): Calculates the square root of the displayed number. Enter a number, then press √.
• MU (Margin Account): Used for profit margin calculations. For example, to calculate selling price with a 25% profit margin on a cost of $80: enter 80 ÷ 25 MU.
• GT (Grand Total): Accumulates the results of multiple calculations. Press GT to display the grand total.

Clear Functions:

• ON/C/CE:
  • Press once to clear the last entry (CE).
  • Press twice to clear the entire display (C).
  • Press to turn on the calculator if it's off.
• AC (All Clear): Clears all entries, memory, and resets the calculator to its initial state.

Decimal and Rounding Settings:

The calculator features slide switches for adjusting decimal places and rounding modes. These switches are located above the number pad.

• Decimal Selector (F 4 2 0 A):
  • F (Floating Decimal): Results are displayed with full decimal precision.
  • 4, 2, 0: Sets the number of decimal places to 4, 2, or 0 respectively.
  • A (Add Mode): Automatically adds a decimal point after the second digit for currency calculations (e.g., 123 becomes 1.23).
• Rounding Selector (UP 5/4 CUT):
  • UP (Round Up): Rounds up the last digit.
  • 5/4 (5/4 Round): Standard rounding; rounds up if the digit is 5 or greater, otherwise rounds down.
  • CUT (Cut Off): Truncates the number, discarding any digits beyond the set decimal places.

5. Maintenance

Cleaning:

To maintain the calculator's appearance and functionality, clean it regularly.

• Use a soft, dry cloth to wipe the exterior of the calculator.
• For stubborn dirt, slightly dampen the cloth with water or a mild, non-abrasive cleaner. Avoid using harsh chemicals, solvents, or abrasive materials, as these can damage the display or casing.
• Do not spray cleaning solutions directly onto the calculator.

Battery Replacement:

If the display becomes dim or unresponsive, even in bright light, the AA battery may need replacement. Refer to the "Battery Installation" section under "Setup" for instructions on how to replace the battery.

Storage:

Store the calculator in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.

6. Troubleshooting

7. Specifications

• Model: C-2735
• Display: 12 Digits, Large LCD
• Power Source: Dual Power (Solar & 1x AA Battery)
• Product Dimensions: 7.3 x 6.2 x 1.7 inches (185mm x 156.7mm x 42.6mm)
• Item Weight: 11.4 ounces
• Screen Size: 5.1 Inches / 13 cm (visible diagonal)
• Calculator Type: Standard Function
• Color: Champaign Gold panel
• Manufacturer: Comix
• Date First Available: June 29, 2017

Image 4: Dimensions of the Comix C-2735 calculator. This image provides measurements in both millimeters and inches, showing the length, width, and thickness, along with a 30-degree viewing angle.

8. Warranty and Support

For warranty information or technical support regarding your Comix Desktop Calculator C-2735, please refer to the documentation included with your purchase or contact Comix customer service directly. Contact details can typically be found on the manufacturer's official website or on the product packaging.

The product is sold by "Comix Group" on Amazon. For specific return policies, please refer to your purchase details on Amazon.