„Trigonometric / Inverse-Tri. Functions

The calculator provides standard trigonometric functions and inverse trigonometric functions - sin, cos, tan, sin –1, cos –1and tan –1. See

Example 35~37.

(Note) : When using those keys, make sure the calculator is set for the angle unit you want.

„Hyperbolic / Inverse-Hyp. Functions

The calculator uses [ 2nd ] [ HYP ] to calculate the hyperbolic functions and inverse- hyperbolic functions – sinh, cosh, tanh, sinh –1, cosh –1and tanh –1. See Example 38~39.

(Note) : When using those keys, make sure the calculator is set for the angle unit you want.

„Coordinates Transformation

Pressing [ 2nd ] [ RP ] displays a menu to convert rectangular coordinates to polar coordinates or vice versa. See Example

40~41.

Rectangular Coordinates

Polar Coordinates

x + y i = r (cosθ+ i sinθ)

(Note) : When using those key, make sure the calculator is set for the angle unit you want.

„Probability

zPressing [ PRB ] displays the probability menu. See Example 42~46. With the following functions :

nPr Calculates the number of possible permutations of n item taken r at a time.

nCr Calculates the number of possible combinations of n items taken r at a time.

!Calculates the factorial of a specified positive integer n , where n ≦ 69.

RANDM Generates a random number between 0 and 1.

RANDMI Generates a random integer value between two specified integers, A and B, where A ≦ random value ≦ B

E – 14

File name : CBM_SR285,A_HDBSR285T19_English.doc

version : 2010/04/26

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Citizen SRP-280N manual „ Trigonometric / Inverse-Tri. Functions, „ Hyperbolic / Inverse-Hyp. Functions, „ Probability
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SRP-280N, SRP-280N/SRP-285N specifications

The Citizen SRP-280N and SRP-285N are both advanced thermal printers designed to meet the needs of various industries, including retail, hospitality, and logistics. Known for their reliability and performance, these models are particularly favored for their speed and efficiency in printing receipts and labels.

One of the standout features of the SRP-280N is its high-speed printing capability. It can produce printouts at an impressive rate of 200 mm per second, ensuring that businesses can process transactions quickly, which is crucial during peak hours. Similarly, the SRP-285N offers rapid printing speeds, making it ideal for environments where time is of the essence.

Both models utilize direct thermal printing technology, which eliminates the need for ink or ribbons, reducing maintenance costs and downtime. The printers are equipped with easy-to-load paper mechanisms, allowing users to quickly replace paper rolls with minimal disruption to workflow. This feature is particularly advantageous for high-volume settings where efficiency is paramount.

The Citizen SRP-280N and SRP-285N support a variety of paper widths, making them versatile for different printing tasks. The models can handle standard thermal paper rolls, commonly used for receipts, as well as labels, catering to diverse business requirements. This flexibility is further enhanced by the compatibility of both printers with various operating systems, including Windows and Android, ensuring seamless integration into existing systems.

Connectivity is another key aspect of the SRP-280N and SRP-285N offerings. Both printers come equipped with multiple interface options, including USB, Ethernet, and Bluetooth, allowing users to connect to various devices seamlessly. This feature is particularly useful for businesses adopting mobile payment systems or those needing to connect multiple devices to a single printer.

Additional characteristics of these models include a compact design that saves counter space, as well as robust construction for durability in demanding environments. They also feature an energy-efficient design, contributing to lower power consumption while operating, aligning with modern needs for sustainability.

Overall, the Citizen SRP-280N and SRP-285N printers combine speed, versatility, and durability, making them an excellent choice for businesses that require reliable printing solutions. With their advanced technology and thoughtful design, these printers can significantly enhance operational efficiency in any setting.
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