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II. ANSI/IEEE 1992 Maximum Permissible Exposure (MPE) for Uncontrolled Environments

Electromagnetic Fields

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

__________

Electric Field

Magnetic

Strength

Strength

E (V/m)

H (A/m)

Frequency

Range (MHz)

Field

Power Density (S)

Averaging Time

E-field; H-field (mW/cm2)

(minutes) |E|2; S; or |H|2

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

_ _ _ _ _ _ _ _ _ _

30-100

27.5

158.3/f1.668

(0.2; 940,000/f

100-300

27.5

0.0729

0.2

300-3000

--

--

f/1500

3000-15,000 --

--

f/1500

15,000-300,000 -- --

10

616,000/f1.2

0.003-0.1

614

163

0.1-1.34

614

16.3/f

1.34-3.0

823.8/f

16.3/f

3.0-30

823.8/f

16.3/f

( 1 (100; 1,000,000)* (100; 10,000/f2)* 8 0 / f ; 1 0 , 0 0 0 / f ) * 2 2 ( 1 8 0 / f ; 1 0 , 0 0 0 / f ) * 2 2 3.336 )*

6 6 f2/0.3 30 30 30 30 90,000/f --

6 6 6 6 0.0636f1.337 30 -- --

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __________ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

  • *

    Plane-wave equivalent power density; not appropriate for near-field conditions, but sometimes used for

comparison purposes. f = frequency in megahertz (MHz) V/m = volts per meter A/m = amperes per meter mW/cm2 = milliwatts per centimeter squared

Induced and Contact Radiofrequency Currents ____________________________________________________________________________________

Frequency Range (MHz)

Maximum Current (milliamps)

Through both feet

Through each foot

Contact Current

____________________________________________________________________________________

0.003-0.1

900f

450f

450f

0.1-100

90

45

45

____________________________________________________________________________________

61

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