ISSN : 1738-4125(Print)
ISSN : 2287-7509(Online)
ISSN : 2287-7509(Online)
PC 이용공간에서 VDT 특성에 따른 자기장 노출 평가
Characterization of EMF Emission from VDT in Computer Room
Abstract
To investigate characterization of EMF(Electromagnetic Field) emission from VDT(Visual Display Terminal)in computer room, we were divided into 3 types of placement monitors which are 1) back side of monitorfaced the ground(back view type), 2) arrangement of monitors was a line type(two sides type), and 3)disposition of monitors was s straight(horizontal line type). We also measured monitors classified types atthe front, side and back by distance and evaluated by TCO(The Swedish Confederation of professionEmployers) and MPR-2(Measure and Proof Radiation Board) guide line. Magnetic field emission level by thetype of VDT, it was indicated that MF(Magnetic Field) level was below the backgrounds level when CRTmoved away about 70~90cm, LCD moved away about 40~50cm. We evaluated MF emission level by thenumber of VDT, it did not show any relationship. Finally, estimated MF emission level by the placement ofVDT, it was showed the MF level less than the background level, when VDT moved away 40~50cm in alldispositions with exception of 2 sites. Background level of case was higher than emitted from VDT, so thatdid not effect on MF level by distance. However, we find out that as distance increased, MF emission leveldecreased significantly in all cases. We measured MF emission level of one monitor and others (back andforth) monitor in line type. Below the background level when one monitor type moved away 70cm, othersmonitor type moved away 40cm. However, other monitor types affected MF level which is located backmonitor. The data demonstrate that avoiding excessive MF exposure from VDT using computer room, to havea space between user and VDT at least 50㎝.
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