1. Introduction
The CATIGA SP-2401 is a 12-digit thermal printing calculator designed for efficient and accurate calculations. This device features ink-free thermal printing, a fast printing speed of 8.0 lines per second (LPS), and a large fluorescent display for enhanced readability. It includes functions for tax calculation, cost/sell/margin analysis, and memory operations, making it suitable for various professional and personal accounting tasks.

Image: The CATIGA SP-2401 thermal printing calculator, showcasing its display, keyboard, and paper roll output.
2. Setup
2.1 Power Connection
Connect the calculator to a power source using the provided AC adapter. Ensure the adapter is securely plugged into both the calculator and a standard electrical outlet.
2.2 Paper Roll Installation
The SP-2401 uses thermal paper rolls. Follow these steps to install a new paper roll:
- Open the paper roll cover located at the top of the calculator.
- Place the new thermal paper roll into the compartment, ensuring the paper feeds from the bottom of the roll towards the printer mechanism.
- Feed the leading edge of the paper into the printer slot until it is automatically gripped and advanced.
- Close the paper roll cover.

Image: The CATIGA SP-2401 calculator with a user manual page illustrating the paper loading mechanism, highlighting the ease of installation.
This calculator utilizes ink-free thermal printing, eliminating the need for ink cartridges and ensuring clean, smudge-free printouts.

Image: Close-up of the CATIGA SP-2401's thermal printer output, emphasizing its ink-free operation and fast 8.0 LPS printing speed.
3. Operating Instructions
3.1 Display and Keyboard
The calculator features a 12-digit fluorescent display for clear viewing and a full-sized tactile keyboard for precise data entry.

Image: A detailed view of the CATIGA SP-2401's bright, 12-digit fluorescent display, designed for superior readability.

Image: The full-sized tactile keyboard of the CATIGA SP-2401, featuring large, ergonomic buttons for comfortable and accurate data entry.
3.2 Basic Arithmetic
The SP-2401 operates as a functional adding machine. Entries are added to a running total. To perform calculations:
- Addition: Enter the first number, press +, enter the second number, press +. The display will show the running total.
- Subtraction: Enter the first number, press +, enter the number to subtract, press -.
- Multiplication/Division: Use the X and ÷ keys as standard.
- To show and print a subtotal without finalizing the total, press *.
- To clear the current entry, press C.CE.

Image: A visual guide demonstrating basic addition and subtraction operations on the CATIGA SP-2401, showing both display and print-out results.
3.3 Decimal and Rounding Settings
Adjust the decimal point and rounding settings using the dedicated switches on the calculator. Common settings include '2' for two decimal places and '5/4' for standard rounding.
3.4 Tax Calculation (TAX+, TAX-)
The calculator includes dedicated keys for tax calculations. To use these functions, you must first set the tax rate:
- Enter the tax rate percentage (e.g., 5 for 5%).
- Press the SET button (refer to manual for specific key sequence).
- Use TAX+ to add tax to a value or TAX- to subtract tax.
3.5 Cost/Sell/Margin Calculations
Utilize the COST, SELL, and MARGIN keys to perform profit margin calculations. Refer to the detailed manual for specific input sequences.
3.6 Memory Functions
The calculator includes memory functions:
- M+: Adds the displayed value to memory.
- M-: Subtracts the displayed value from memory.
- M*: Recalls the memory total.
- M=: Clears the memory.
3.7 Grand Total (GT)
Press the GT key to display and print the grand total of all calculations performed since the last GT clear or power cycle. Be aware that GT mode can latch across sessions; ensure to clear it if not needed for continuous accumulation.
3.8 Date and Time Setting
The calculator features a clock and calendar function. To set the date and time, refer to the specific key-hold sequence detailed in the full user manual. Use the DATE and TIME keys to display the current date and time.

Image: An overview of the CATIGA SP-2401's key functions, including automatic tax keys, rounding switch, decimal switch, backspace, percent key, grand total, memory, cost/sell/margin, and date & time.
4. Maintenance
4.1 Cleaning the Unit
To maintain optimal performance and appearance, regularly clean the calculator. Use a soft, dry cloth to wipe the exterior. For the display, use a soft, lint-free cloth. Avoid using abrasive cleaners, solvents, or spraying liquids directly onto the unit.
4.2 Replacing Paper Rolls
When the thermal paper roll runs out or the print becomes faint, replace it following the instructions in Section 2.2. Ensure to use only compatible thermal paper rolls for best results and to prevent damage to the printer mechanism.
5. Troubleshooting
If you encounter issues with your CATIGA SP-2401, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Calculator does not power on. | AC adapter not connected or faulty. | Ensure AC adapter is securely plugged in. Test outlet. Replace adapter if necessary. |
| No printout or faint print. | Paper roll empty, incorrectly installed, or non-thermal paper used. | Replace paper roll, ensure correct orientation (thermal side facing print head), use thermal paper only. |
| "Error" displayed. | Calculation overflow or invalid operation. | Press C.CE to clear. Review calculation steps. |
| Incorrect tax calculation. | Tax rate not set or set incorrectly. | Re-enter and set the correct tax rate. |
5.1 Resetting the Calculator
If the calculator becomes unresponsive or exhibits unusual behavior, a reset may resolve the issue. Locate the small RESET button (often recessed) and press it gently with a pointed object (e.g., a paperclip). This will clear all current calculations and settings.
6. Specifications
- Model: SP-2401
- Display: 12-Digit Fluorescent (VFD)
- Printing Method: Thermal Printing
- Printing Speed: 8.0 Lines Per Second (LPS)
- Power Source: AC Adapter
- Dimensions: Approximately 12.99 x 8.11 x 2.8 inches
- Weight: Approximately 2.2 pounds
- Functions: Basic Arithmetic, Tax Calculation, Cost/Sell/Margin, Memory, Grand Total, Date/Time
7. Warranty and Support
CATIGA is committed to providing reliable products and customer satisfaction. For any inquiries or assistance, please refer to the following support options:
- Customer Support: 24/7 online support is available.
- Phone Support: Lifetime support by phone, available 9am - 5pm PST.
- Return Guarantee: A 30-day unconditional return guarantee is provided.
For detailed contact information, please visit the official CATIGA website or refer to the documentation included with your product.

Image: Visual representation of CATIGA's customer support offerings, including 24/7 support, lifetime phone support, and a 30-day return guarantee.


