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KMID : 0895420020120020115
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Journal of Korean Society of Occupational and Enviromental Hygiene
2002 Volume.12 No. 2 p.115 ~ p.125
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The Levels of Electromagnetic Fields Strength Emitted from Several Commercial Photocopiers
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Abstract
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This study was designed to evaluate the levels of electromagnetic fields(EMFs) for extreme low frequency(ElF) and very low frequency(VLF) in accordance with the distance from photocopiers, manufactures, power consumption and the amount of copy in the state of stand-by and running. The subjects were 15 commercial photocopiers by 3 manufacturers from January 15 to April 30 in 2002.
The results were as follows:
1. Electromagnetic fields were not significantly increased according to increase in the amount of copy.
2. The levels of electromagnetic fields were decreased according as the distance from photocopiers was increased.
3. The levels of magnetic fields for ELF at 10cm from photocopiers in the running mode were significantly different between manufacturer A and B. These of magnetic fields for VLF at the same distance and mode in manufacturer A were significantly different with manufacturer C and B.
4. The levels of EMFs at 10cm exceeded the Korean exposure criterion had proved except these of manufacturer A.
From the above results, when photocopiers were running, the levels of EMFs were significantly higher than these of EMFs in the state of stand-by. The levels of magnetic fields for ELF at 10cm were significantly high and exceeded the Korean exposure criterion. Consequently, the preventive control of regulation should be appropriately applied to the workers engaged in copying work.
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