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Measurement and Analysis of Electromagnetic Field Emissions from 24 Video Display Terminals in American Telephone and Telegraph Office, Washington, DC.

PB92205897

Publication Date	1987
Personal Author	Guy, A. W.
Page Count	40
Abstract	Electromagnetic field emissions were determined from 24 video display terminals (VDTs) located in a service office of an American Telephone and Telegraph (ATT) office in Washington, D.C. Health concerns had been expressed to their labor unions by employees using the 24 VDTs. Measurements were conducted on three different types of VDT models including 21 ATT Model 45 units, two TAB Model 132/15 units, and one ATT Model 6300 PC unit. The electric and magnetic field exposure levels at the position of the operator (30 centimeters) based on these measurements were well below all of the exposure standards. The operator's hand could be exposed to electric fields higher than the safety standards while contacting the screen or sides of the terminal. However, the currents induced in the body were significantly less than those induced by environmental far field exposures at levels below all the world's safety standards. The magnitudes of the highest static fields were no different from levels produced by static charges in the environment such as on fabrics and other articles in offices and homes. These fields were particularly low on screens of terminals equipped with anti glare filters.
Keywords	Data processing terminals Display devices Electromagnetic radiation Office personnel Occupational diseases Office equipment Irradiation Magnetic fields Measurement Electric fields Tables(Data)
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 62A - Computer Hardware 41I - Job Environment 94D - Job Environment
Corporate Authors	University Hospital, Seattle, WA. Bioelecromagnetics Research Lab.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199220

Measurement and Analysis of Electromagnetic Field Emissions from 24 Video Display Terminals in American Telephone and Telegraph Office, Washington, DC.

Measurement and Analysis of Electromagnetic Field Emissions from 24 Video Display Terminals in American Telephone and Telegraph Office, Washington, DC.
PB92205897

Publication Date	1987
Personal Author	Guy, A. W.
Page Count	40
Abstract	Electromagnetic field emissions were determined from 24 video display terminals (VDTs) located in a service office of an American Telephone and Telegraph (ATT) office in Washington, D.C. Health concerns had been expressed to their labor unions by employees using the 24 VDTs. Measurements were conducted on three different types of VDT models including 21 ATT Model 45 units, two TAB Model 132/15 units, and one ATT Model 6300 PC unit. The electric and magnetic field exposure levels at the position of the operator (30 centimeters) based on these measurements were well below all of the exposure standards. The operator's hand could be exposed to electric fields higher than the safety standards while contacting the screen or sides of the terminal. However, the currents induced in the body were significantly less than those induced by environmental far field exposures at levels below all the world's safety standards. The magnitudes of the highest static fields were no different from levels produced by static charges in the environment such as on fabrics and other articles in offices and homes. These fields were particularly low on screens of terminals equipped with anti glare filters.
Keywords	Data processing terminals Display devices Electromagnetic radiation Office personnel Occupational diseases Office equipment Irradiation Magnetic fields Measurement Electric fields Tables(Data)
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 62A - Computer Hardware 41I - Job Environment 94D - Job Environment
Corporate Authors	University Hospital, Seattle, WA. Bioelecromagnetics Research Lab.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199220