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General| Brand | Citizen |
|---|---|
| Model | SR-135T |
| Category | Calculator |
| Language | English |
Basic arithmetic (+,-,x,÷), auto-constant, parenthesis, and percentage calculations.
Functions for storing, recalling, and adding to memory (X→M, MR, M+).
Trigonometric, logarithmic, exponential, power, roots, scientific notation, and factorial functions.
Support for binary, octal, decimal, and hexadecimal number system conversions and calculations.
Ensures data in the memory register is retained when the calculator is powered off.
The calculator automatically shuts off after a period of inactivity to conserve battery life.
Functions for computing mean, standard deviation, sample size, and sum of squares.
Converts between rectangular and polar coordinate systems using DRG modes.
Powers on the calculator and clears entries or error conditions.
CE clears the current entry or calculates factorial; OFF powers down the unit.
SHIFT accesses secondary functions; DRG changes angle units (DEG, RAD, GRAD).
Keys for entering numbers, decimal points, and performing basic arithmetic operations.
Keys for executing memory calculations: X→M, MR, and M+.
EXP selects exponent input; = executes the calculation and displays the result.
Illustrates various display formats including floating point and scientific notation.
Shows special indicators like SHIFT, DEG, RAD, memory (M), and parenthesis usage.
Illustrates how error conditions are indicated on the display, typically with 'E'.
Defines the sequence for performing operations in mathematical expressions.
Covers addition, subtraction, multiplication, division, and constant calculations.
Detailed examples of performing calculations using the independent memory register.
Explains how to use parentheses to control the order of operations in complex expressions.
Examples of converting between rectangular and polar coordinate systems.
Demonstrates arithmetic operations involving complex numbers.
How to compute average, standard deviation, and sample size for datasets.
Details on display digits, mantissa, exponent, and internal components (CMOS/LSI).
Information on power supply, consumption, and operational temperature range.
Specifies the calculator's size (L x W x H) and its weight.
