Frequently Asked Questions1) What is bar code?
A bar code can best be described as an "optical Morse code." Series of black bars and white spaces of varying widths are printed on labels to uniquely identify items.
2) How the bar code size is measured?
The barcode is measured in unit called "mils" (thousandths of an inch).
3) What is quiet zone in the Bar code?
Immediately preceding the start character and following the stop character is an area of no markings called the quiet zone.
4) Whai is the benefits of Barcoding?
Bar code data-collection systems provide enormous benefits for just about any business. With a bar code data-collection solution, capturing data is faster and more accurate, costs are lower, mistakes are minimized, and managing inventory is much easier.
5) What is the type of Barcode ?
Barcodes are of two types linear or one-dimensional barcodes and 2D barcodes.
6) What is linear barcode?
Barcodes systematically represented data by varying the widths and spacing of parallel lines, and may be referred to as linear or one-dimensional.
Eg EAN-13 Code-128
7) What is 2 Dimensional barcode?
A matrix code, also termed a 2D barcode or simply a 2D code, is a two-dimensional way to represent information. It is similar to a linear (1-dimensional) barcode, but can represent more data per unit area.
Eg. PDF-417 Datamatrix 2D
8) What is Barcode Reader?
Electronic device that scans a barcode by shining a laser beam on it.These are 'non-contact' automatic data capture devices, operate only at short distances.
9) How Barcode readers work?
The black bars absorb light, while the white bars reflect it. Photo diodes turn the reflected light into an electrical signal, which is converted into digital pulses. and measures reflected light and interprets the code into numbers and letters that are passed on to a computer.
10) What is the type of Barcode readers?
Barcode readers or scanners are of three types laser , Imager and CCD.
11) How is laser scanners works?
Laser scanners uses a laser beam as the light source and typically employ either a reciprocating mirror or a rotating prism to scan the laser beam back and forth across the bar code.
12) How is Imager scanners works?
Two-dimensional imaging scanners are the fourth and newest type of bar code reader. They use a camera and image processing techniques to decode the bar code.
13) What is CCD scanners?
CCD (Charged Couple Device) readers use an array of hundreds of tiny light sensors lined up in a row in the head of the reader. Each sensor measures the intensity of the light immediately in front of it. Each individual light sensor in the CCD reader is extremely small and because there are hundreds of sensors lined up in a row, a voltage pattern identical to the pattern in a bar code is generated in the reader by sequentially measuring the voltages across each sensor in the row.
14) What are different types of scanner interface for communicating with the computer?
There are three type of interfaces a) KBW (Key Board Wedge) b) RS232 c) USB
15) What is Barcode Printers?
A barcode printer is a computer peripheral for printing barcode labels or tags that can be attached to physical objects. Barcode printers are commonly used to label cartons before shipment, or to label retail items with UPCs or EANs.
16) What is the type of Barcode Printers?
Barcode printers are of two type ,Direct thermal & Thermal Transfer
17) What is Direct Thermal technology?
Direct thermal printers use a printhead to generate heat that causes a chemical reaction in specially designed paper that turns the paper black.
18) What is Thermal Transfer technology?
Thermal transfer printers also use heat, but instead of reacting the paper, the heat melts a waxy or resin substance on a ribbon that runs over the label or tag material. The heat transfers ink from the ribbon to the paper.
19) How is the barcode printers classified according to area of application?
They are a) Desktop Printers b) Industrial Printers c) Heavy duty Industrial Printers d) Card Printers e) Mobile Printers
20) What is the type of Thermal Ribbons?
Thermal ribbons come in three main types: wax, wax/resin or pure resin and are almost always black .
21) What is the use of Wax ribbons?
Wax ribbons are for printing onto paper labels also called chromo, where the life of the label can be years but must be kept dry and must not be abraded or subjected to certain chemicals or oil, which would dissolve the wax image.
22) What is the use of Wax-Resin ribbons?
Wax/resin ribbons produce a finer image on very smooth paper or coated paper labels. The printed image is much more durable than wax, but can still only stand slight contact with water.
23) What is the use of Pure Resin ribbons?
Pure resin ribbons are formulated to print onto plastic labels such as polyester, polypropylene and vinyl. The "ink" is designed to slightly dissolve into or adhere to the plastic surface of the label and becomes extremely durable, depending on the plastic material and ribbon make used.
24) What is the type of labels?
Labels are chromo paper ,Non tear able (NT) and white polyester & silver polyester
25) Whai is Hand held terminals (HHT) or Mobile computers?
A mobile computing device is described as small, lightweight, portable and containing wireless Internet access