Appendix

Procedures for

When battery power becomes

replacing unit

low, a message will show

operation

indicating that a new set of

batteries

batteries are needed.

 

1.

Turn off the calculator’s

 

 

power (@o).

 

2.

Turn over the calculator.

 

 

Locate the battery compart-

 

 

ment cover, and open the

 

 

cover as illustrated.

 

3.

Replace all four AAA

 

 

batteries as illustrated.

 

4.

Replace the battery com-

 

 

partment cover.

 

5.

Press O.

 

 

The following message will

 

 

appear.

 

 

If the message does not

 

 

appear, repeat the proce-

 

 

dures from step 2.

 

6.

Press O.

Replacing the memory backup battery

Note:

Do not press C. This will clear all the data.

Once every 5 years, the lithium battery will need to be replaced.

The lithium battery is used to maintain the memory of the calculator.

Do not remove the lithium battery while the unit operation batteries are removed; otherwise all the calculator’s stored memory will be lost.

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Sharp EL-9900 operation manual Procedures for, Replacing unit, Operation

EL-9900 specifications

The Sharp EL-9900 is a remarkable scientific calculator that exhibits a fusion of advanced features, cutting-edge technology, and an ergonomic design tailored for both students and professionals. One of the standout characteristics of the EL-9900 is its extensive range of functions, boasting over 550 built-in calculations that cover various mathematical and scientific disciplines. This calculator is particularly popular among engineering and physics students due to its ability to handle complex calculations with ease.

One of the key features of the EL-9900 is its 2-line display, which allows users to view both the input and the result simultaneously. This dual display enhances usability, especially when dealing with intermediate steps in calculations. The calculator also includes a built-in 12-digit LCD screen, which ensures clarity and precision in reading numbers, making it easier for users to work for extended periods without straining their eyes.

The EL-9900 is equipped with a wide array of mathematical functions, including trigonometric, logarithmic, and exponential functions. Notably, it supports fraction calculations, statistical analyses, and unit conversions. Its advanced programming capabilities, such as 36 programmable functions and the ability to store data, further enhance its functionality, allowing users to create custom calculations tailored to specific needs.

One of the more modern technologies incorporated into the EL-9900 is its solar-powered function, which is complemented by a battery backup, ensuring that the device remains operable in varied lighting conditions. This environmentally friendly design reduces the need for frequent battery replacements, making it a cost-effective choice for users.

In terms of design, the Sharp EL-9900 boasts a slim profile and lightweight construction, which makes it portable and easy to carry. Its durable casing ensures that it can withstand the rigors of daily use, whether in a classroom setting or a professional environment.

Overall, the Sharp EL-9900 stands out as a versatile scientific calculator packed with features designed to meet the needs of students and professionals alike. Its robust functionality, clear display, and user-friendly design make it a reliable tool for anyone engaged in mathematical and scientific pursuits. Whether used for basic calculations or advanced problem-solving, the EL-9900 remains a powerhouse in the realm of scientific calculators.