General information about Electronic Calculator

Date: Feb.20th, 2014

GENERAL

Although Computer, Iphone and Andrid phones are very popularized nowadays, all of them has the function of an Electronic Calculator, Electronic Calculators still has a huge market share, This is because of the strong demands of calculators in Office (especially Financial Department), Supermarket, Stores, Schools etc. With many years of development, now the product is very mature, the style, material, color and function are very diversified. This article is written to help you understand more about Electronic Calculators.

TYPE OF CALCULATORS

Based on different size, function and usage, calculator is basically classified to the below types:

1. Desktop Calculator

Middle to large size. Mainly used in office, supermarket, store and home as office supply products.

2. Handheld/Pocket Calculator

Small to medium size, manly used by the people who needs to carry it around for calculation, or do calculation during business trip.

3.Scientific Calculator

Main consumers are students and engineers

4. Multi-function Calculator

Mainly Cost-sell-margin calculator, Tax calculator and Euro-converting calculator, Graphic Calculators etc.

5. Gifts and promotion calculators

Novelty design, lovely design, multiple color, combine with other products to make a calculator set, such as ruler calculator, pencil box calculator, notebook calculator, calculator with sticky note, mouse pad calculator, etc.

MAJOR FUNCTION

* basic calculation function (“+” “-“ “×”“÷”)

* Tax function

* GT function

* Mark up function

* Memory Calculation

* Square Root

* Percentage function

* Negative/positive changeable

* Backspace function

* Decimal selection function

* Rounding selection function

* Assorted colours

* Large area for customized LOGO

* ON & OFF key

END USERS

1. COMPANY (ESPECIALLY FINANCIAL DEPARMENT AND SALES DEPARTMENT)

2. SUPERMARKET, STORES

3. STUDENTS

4. HOME-USE

5. USERS WITH SPECIAL FUNCTION NEEDED

Cost-sell-margin

Tax

Euro-converting

6. GIFTS AND PROMOTION PROJECTS

MATERIAL

ABS (with different quality standard, pure, recycle, mixed, different cost)

HIPS (with different quality standard, pure, recycle, mixed, different cost)

PVC

Acrylic

Aluminum cover

Silicon

Rubber keys (commonly used material for keys are rubber keys and plastic keys)

QUALITY DEFINE

High quality standard calculator

1. High quality plastic (pass drop test)

2. High quality LCD screen

3. Green Hard PCBA circuit board

4. High quality solar panel (working threshold: 250 Lux (at 20°C)

5. Good structure (no gap between top and bottom cover)

6. Comfortable key press

6. High quality (RoHS standard) battery with longer lifespan

Low quality standard calculator

1. Recycle plastic covers

2. Fake solar panel, or working threshold above 250lux  

3. Poor structure (gap)

4. Poor tooling (tooling mark, sharp edges, gap)

5. Poor engineer (heavy key press

6. un-environmental material

Major Quality Issue

- Function issue: operation with no display, with missing display, with wrong display, certain key no function.

- LCD issue: segment not shown, black dots, dirty, wrong display, show LCD edges, rainbow screen, LCD display unclear.

- Noise: shake calculator with noise

- Plastic fragile: can’t pass drop test, screw falling down

- Dirty: dirty LCD screen, dirty solar panel (with finger print), with other substance (such as hair, EVA feet, screws, etc)

- Poor-silk-printing: reversed printing, slanted printing, missing printing, vague printing, printing un-centered

- Gap

- Scratch

- painting uncover

- stuck key

- 4 feets uneven

- Pull the keys, wipe the keys, keys fall off

- missing screws

- Wrong printing material (manual, sticker, backcard, colorbox, etc.)

- Poor plastic, fragile, can’t pass drop test

- Assembling issue: miss placed keys, reversed keys

- Weak packages

Battery replacement

When the LCD screen is dim, battery needs to be replaced.

If the calculator has a battery door, open the battery door, mind the “+” and “-“, place the battery in place and re-close the battery door.

If the battery does not have a battery door, use a screw driver to unscrew the screws, open the back cover, use the screw driver to push out the old battery, install the new battery facing the correct direction of “+” and “-“, put the screws back and tighten the backcover.