IEC-28360-2015 pdf free download – Information technology — Office equipment — Determination of chemical emission rates from electronic equipment — Part 1: Using-consumables.
7.3Air mixing efficiency
The air mixing efficiency in the ETC shall be as specified in ISO 16000-9.
8Determination method
8.1Test conditions
8.1.1General
To meet the operational requirements specified herein, ETC parameters such as temperature, relativehumidity and supply airflow shall be controlled and measured at regular intervals and recorded inaccordance with iSo 16000-9 and shall be reported as specified in Clause 9.
8.1.2Operating temperature and relative humidity (RH)
Tests shall be executed at(23±2)°Cand (50±5)%RH according to lSO 554.For EUTused in alternativeclimatic conditions, higher operating temperature and humidity conditions may be used as specified inISO 554.
Consult 8.2.8.3.2 for special requirements on RH for EUT using consumables.
8.1.3Air exchange rate (n)
For unloaded ETCs with a volume larger than 5 m3,n shall be in the range from 1,0 to 2,0.For unloadedETC’s with a volume of 5 m3 or smaller, n shall be in the range from 1,0 to 5,0.
8.1.4Air velocity
The air velocity in the unloaded ETC shall be in the range from 0,1 to 0,3 m/s.8.1.5Sampled air flow
The sum of sampled airflow shall be less than 80 % of the inlet airflow into the ETc.8.2Handling of EUT and ETC
8.2.1Selection and storage of EUT
EUT shall be selected from normal manufactured batches or shall be a prototype that is representativefor EUT from such batches. For determinations using theRAL-UZ 205Option,EUT shall be stored in itsoriginal packaging in a standard normal climate (23 ± 2C,50± 5 % RH) and tests should be executedwithin 10 working days after delivery of the EUT.
8.2.2 Loading Factor
To ensure detection of a minimum emission within a practicable time, the ETC with capabilities asspecified in Clause 7 shall be selected such that the loading factor is in the range of 1:4 to 1:400.For theETC where the loading factor is in the range of 1:100 to 1:400, the air volume flow of the ETC shall bes5 m3/h.
8.2.3 ETC purging
The selected ETC shall be unloaded and its interior walls shall be cleaned as described in IS0 16000-9.The ozone half-life, the period of time for the ozone concentration (C) to drop from C to C/2, shall begreater than 10 minutes, when n = 1.
To determine the ozone half-life, the ETC should be deactivated by exposure to an ozone concentration of 0,2 mg/m 3 to 0,4 mg/m 3 for at least ten minutes or until a stable concentration is reached.
Thereafter, the ETC shall be purged with 4 ETC volumes of clean air.
8.2.4 Background concentrations (C bg )
Following purging, the C bg of analyte in the unloaded ETC shall be determined and recorded.
NOTE C bg may stem from e.g. emissions from the ETC itself and sampling tubes or filters.
The C bg values at n = 1, shall be below the limits in Table 1.
8.2.5 EUT unpacking
Emissions from packaging may influence measurements considerably; in addition packaging itself mayemit VOCs that are not representative for EUTs in typical use. Therefore, the EUT to be tested shaillbe removed from the shipping containers and all protective shipping packaging such as spacers, filmwrapping and any other shipping/packaging elements before preparation (as specified in 8.2.6).
NOTE After unpacking, installation (step 8.2.7) may precede the preparation step (8.2.6).
8.2.6 Preparation of the EUT before testing
A 60 g/m2 to 80 g/m2 A4 paper with water content between 3,8 % and 5,6 %, and printing the patternsas specified in A.1 and A.2 are appropriate for the following preparatory operation. The maximumduration of the operating phase shall be determined.Thereafter, lightness(L*) and colour values(L*, a*,b*), as appropriate shall be determined from the printouts according to CIE 15:2004.
Before testing the EUT may be used up to the duration of the MUT.The MUT (as duration of the totaloperating cycles) is 120 minutes.
One to two 10-minutes operating cycles outside or inside the ETC shall be performed at least one daybefore the UFP test in order to determine the print speed, to ensure the proper operation and to avoidinfluence on emissions due to unstable UFP emission which sometimes may occur in operation afterlong-term disuse of the EUT.IEC-28360 pdf download.