Xerox Phaser 5500 series Manual suplementar - Página 4

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The ISO/IEC

Consumable Yield Standard

(continued)

Different implementations of color tables and color balance optimization among

manufacturers can lead to yield variations between color cartridges, even if they have

the same toner weight. To account for this, ISO supports a second reporting method

called "composite yield," allowing a single average reporting yield for Cyan, Magenta

and Yellow toner cartridges. Black is reported separately as an individual yield.

Average Continuous Composite CMY Yield: XX,XXX pagesAverage Black Continuous

Yield: XX,XXX pages

ISO/IEC 19752, ISO/IEC CD 19798, and IS0/IEC 24711 specify the use of a standard

test page for black-and-white and multiple test pages for color products, explicit testing

procedures, statistical sampling, environmental controls and well-defined cartridge

end-of-life status. More detail on these specifications is available in Section 4 of this

document.

Xerox has adopted ISO/IEC 19752 for testing and reporting toner cartridge yields for

its black-and-white printers and MFPs. Likewise, Xerox has adopted ISO/IEC 19798

for testing and reporting toner cartridge yields and ISO/IEC 24711 for testing and

reporting solid ink stick yields for its color printers and MFPs. Adopting ISO/IEC yield

reporting standards benefits manufacturers and customers, enabling consumable yield

comparisons across product lines and manufacturers.

Test Parameters and Conditions

Printers and Cartridges — A minimum of three printers or MFPs are tested, using a

minimum of three toner cartridges per device. Toner cartridges are procured in the

open market from multiple sources, and for newly developed printers or MFPs cartridges

should be sourced from different production lots. Testing nine samples of each toner

cartridge produces lowest predicted yield estimates with 90% statistical significance.

Standardized Test Page — A single page (see Figure 1) is used for testing. Area

coverage on the page is just below 5%. Pages are printed in a semi-continuous print

mode, stopping only for paper replenishment.

Device Setup — Printers are set up according to manufacturer instructions using default

drivers and settings. New printers must run through one complete toner cartridge before

starting the test.

Environmental Conditions — Testing must be done in an environment where

temperature and humidity can be maintained within acceptable parameters.

A. Temperature Range: 23º C ± 2º C (73ºF ± 4ºF)

B. Humidity Range: 50% ± 10% RH

Specific "Toner Out" Conditions — If a printer is equipped with "Toner Out" sensing,

printing stops when this message is issued and the printer will no longer function. If a

manufacturer recommends shaking toner cartridges, this is done at "Toner Low" but

not more than two times. If a printer does not stop at "Toner Out", cartridge testing is

stopped as soon as fading bars appear. If a printer has "Toner Out" sensing but fading

bars appear (even after toner shaking), testing will stop.