Diagraph PA/4000, Руководство по обслуживанию, Страница: 140 / 213

K—Abbreviation for the Greek prefix kilo-, meaning thousand. In computer terms, K
usually represents 2
10
or 1024.
Kbyte (Kb)—1024 bytes.
LCD—Liquid crystal display
liner—material employed as backing or carrier medium for labels.
margin (see Quiet Zone)
MEK—Methyl ethyl ketone: base or vehicle for ink
memory—Hardware in microcomputers used to store and recall data.
microcomputer—Computer based on a microprocessor, used primarily by only one
person at a time. Microcomputers work with data words of 4, 8, 16 or 32 bits.
MSDS—Material Safety Data Sheet
noise—Undesirable electrical interference that degrades a signal. Sources of noise
include computer displays, AC power lines and digital switching circuits.
OCR—Optical Character Recognition, the machine recognition of printed characters
by light-sensing techniques; 2) Acronym for Optical Character Reader. An
information processing device that accepts prepared forms and converts data from
them to computer output.
OCR-A—Abbreviation for the character set contained in the ANSI Standard X3.17-
1981: a stylized font used for optical character recognition printing.
OCR-B—Abbreviation for the character set contained in the ANSI Standard X3.49-
1975: a stylized font used for optical character recognition printing.
opacity—1) Optical property of a substrate material that quantifies transmission from
the back side or the next sheet; 2) Property of an ink that prevents the substrate
from showing through.
operating system—Structured set of system programs that controls the activities of a
computer system and associated peripheral devices as well as the execution of
programs and the flow of data.
OSHA—Occupational Safety and Health Administration
parity—An error-checking procedure in which the number of 1’s must always be the
same—either odd or even—for each group of bits transmitted without error.
PCS—Print Contrast Signal, measure of the ratios of the reflectiveness between the
bars of a bar code.
PCX—File extension for bit-mapped graphics file for PC-Paintbrush and other
applications that support the PCX format (300 dpi).
Peel Blade—A metal plate inside the PA/4000’s print engine that separates the label
stock from its non-adhesive leader.
Photocell—A light-sensing device that detects a product on a conveyor line and
triggers the PA/4000 to print and apply a label.
Pixel— The smallest element with controllable color and brightness in a video display
or computer graphics.
pressure differential (ÐP)— Increases and decreases in pressure as measured by ink
or air pressure gauges.
program—Set of instructions for a computer to execute that is written in a
programming language or assembly language.
programming—Process of writing instructions for a computer to execute.