Produkty značky Leica-biosystems

Leica IP S

3.3.3 Printing bar code

Printing readable bar code depends on various factors that need to be

taken into consideration in order to achieve results suitable for reliable and

durable archiving. The main factors influencing the bar code results are:

• printertechnology

• howthebarcodeiscreated

• thetypeofobjectbeingprintedon

• thetypeofscannerusedtoreadthebarcode

Printer technology

• Asadotmatrixprinter,theIPScanhandleinformationonlyintheform

of dots printed or not printed. It is not possible to transmit bar code data

or to select specific bar code types or use the printer to create and print

the bar code required.

Creating bar codes

• Sincethereisonlylimitedprintingspaceontheslides,thebarcode

should not contain more information than necessary.

• Youshoulduseanerror-checkingcode,whichmakesiteasierforthe

bar code scanners to recognize possible errors. Some codes even sup-

port error correction.

• Whencalculatingandcreatingbarcode,alwaysbearinmindtheresolu-

tion of the printer.

The module size is the width of the smallest element of a bar code. Wider

bars and spaces are calculated in multiples of the module size.

The module size always has to be an entire divisor of the printer resolu-

tion, as, due to the technology applied, only 'whole' dots can be printed.

Reading errors may occur (even if the print appears to be crisp and cor-

rect), if, due to conversion, module width and resolution do not match

any longer.

3. Instrument Components and Specifications

Data should never be printed as bar code only, but also as text

(line of optical characters above or below the bar code), to ensure

that no information is lost for the above reasons.