KS C IEC 61786-2008 Measurement of low-frequency magnetic and electric fields with regard to exposure of human beings-Special requirements for instruments and guidance for measurem.pdf

1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS C IEC 61786 KS C IEC 61786:2008 2008 8 8 http:/www.kats.go.krKS C IEC 61786:2008 : ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：2008 8 8 2008-0415 ： ： ( 02-509-7262) (http:/www.kats.go.kr). 10 5 , . KS C IEC 61786:2008 i . ii 1 1 2 1 3 .2 4 7 5 8 5.1 8 5.2

2、 .12 5.3 15 5.4 16 5.5 17 6 18 6.1 18 6.2 .20 6.3 22 6.4 22 6.5 23 A( ) 25 B( ) 35 C( ) .45 D( ) ( ) 48 E( ) ( ) .61 F( ) 70 G( ) .71 H( ) 72 KS C IEC 61786:2008 ii 1998 IEC 61786, Measurement of low-frequency magnetic and electric fields with regard to exposure of human beings Special requirements

3、for instruments and guidance for measurements , . (quasi-static) , / . (quasi-static field) (power frequency)(50/60 Hz) (harmonic field) , (field) . , (Video Display Terminals, VDT), (vertical scan) , (162/3Hz 25 Hz), (adjustable speed drive) 0 Hz3 kHz, (400 Hz), (induction heater)(50 Hz9 kHz), . ,

4、, (frequency content), , , . . . , . (International Standard) , . , . , . . KS C IEC 61786:2008 Measurement of low-frequency magnetic and electric fields with regard to exposure of human beings Special requirements for instruments and guidance for measurements 1 , 15 Hz9 kHz (steady-state root-mean-

5、square, r.m.s.) . (quasi-static field) (power frequency)(50/60 Hz) (harmonic field) , (field) . (magnitude) 100 nT100 mT, 1 V/m50 kV/m . , , (specified uncertainty) (calibration) . , . (field) , , (measurement uncertainty) . , (unperturbed electric field strength)( , ) . , 5. 6. , D E . 2 . . KS C I

6、EC 61786:2008 2 . IEC ISO . KS C IEC 61000 3-2, (EMC) 3： 2： ( 16 A ) KS C IEC 61000 4-2, (EMC) 4： 2： KS C IEC 61000 4-3, (EMC) 4： 3： KS C IEC 61000 4-4, (EMC) 4： 4： KS C IEC 61000 4-6, (EMC) 4-6： KS C IEC 61000 4-8, (EMC) 4： 8： KS C CISPR 11, (EMC) (ISM) ISBN 92 67 01075 1： 1993, International vocab

7、ulary of basic and general terms in metrology, International Organization for Standardization ISBN 92 67 10188 9： 1995, ISO TAG, ISO Technical Advisory Group on Metrology, Working Group 3, Guide to the expression of uncertainty in measurement IEEE Std 539： 1990, IEEE Standard Definitions of Terms Re

8、lating to Corona and Field Effects of Overhead Power Lines 3 . “ (magnetic flux density)” “ (magnetic field)” . 3.1 3.1.1 (acceptance test) 3.1.2 (type test) , , / . 3.2 3.2.1 (alternating electric field strength meter) KS C IEC 61786:2008 3 . (free-body), (ground reference), (electro-optic) 3 . 2 .

9、 (probe) (field-sensing element) (detector). , r.m.s. . 3.2.2 (electro-optic meter) , , (Pockels) , (Kerr) , , . 3.2.3 (free-body meter) ( ) 2 . , . . , ( , ), . 3.2.4 (fluxgate magnetometer) (ferromagnetic core) 3.2.5 (ground reference meter) . . . (derivative relationship) (integrator circuit) . 3

10、.2.6 (magnetic flux density meter) 1 , . r.m.s. . KS C IEC 61786:2008 4 2 , (coil probe) , (Hall) , 2 . 3.2.7 (survey meter) , 3.2.8 (coil probe) . . 1 , . 2 ( ) . 3.2.9 (Hall effect probe) . (substantial static geomagnetic flux) (saturation) , . 3.3 3.3.1 (crest factor) (periodic function) , r.m.s.

11、 (waveform crest) ( , ) 3.3.2 (crosstalk) 3.3.3 (frequency response) ( ) 3.3.4 (pass-band) a) ( ) b) (stop band) ( ) KS C IEC 61786:2008 5 3.3.5 (r.m.s. ) (rectified average detector) (3.3.6 ) , r.m.s. , (r.m.s. ) , r.m.s. (true r.m.s.) . , . 36, 61. 3.3.6 r.m.s. (true r.m.s. detector) (r.m.s. ) Ttt

12、vT0 2d)(1(1) v(t) , T . 1 v(t) , r.m.s. 25, 61. r.m.s. , , (flat) . 2 v(t) , . 3.4 3.4.1 r.m.s. ( ) (maximum r.m.s. value of electric field) (elliptically polarized) . , (semi-major axis) r.m.s. 3.4.2 r.m.s. ( ) (maximum r.m.s. value of magnetic field) . , r.m.s. 3.4.3 (perturbed field) . , . , , .

13、(eddy current) . 3.4.4 (unperturbed field) KS C IEC 61786:2008 6 , 3.4.5 (quasi-static field) f c I . f , c ( ), I . . 3.4.6 (resultant electric field) ER=222zyxEEE + (2) Ex, Ey, Ez 3 (orthogonal field component) r.m.s. . . ER=2min2maxEE + (3) Emax Emin (semi-minor axis) r.m.s. . ER Emax . (linearly

14、 polarized) , Emin= 0 ER= Emax . (circularly polarized) , Emax= Emin ER 1.41 Emax . , CENELEC PR ENV 50166 15 “ (effective field strength)” . 3.4.7 (resultant magnetic field) BR=222zyxBBB + (4) Bx, By, Bz r.m.s. . . BR=2min2maxBB + (5) Bmax Bmin r.m.s. . BR Bmax . (linearly polarized) , Bmin= 0 BR=

15、Bmax . (circularly polarized) , Bmax= Bmin BR 1.41 Bmax . , CENELEC PR ENV 50166 15 “ (effective field strength)” . 3.5 3.5.1 (correction factor) KS C IEC 61786:2008 7 ( ) , . 3.5.2 (coverage factor) (expanded uncertainty) (standard uncertainty) z (normal distribution) (quantity) z , zk k = 1, 2, 3

16、68.27 %, 95.45 %, 99.73 % . 3.5.3 (scale factor) 3.5.4 ( ) spot measurement (point-in-time measurement) . . 3.5.5 (standard uncertainty) 3.5.6 (uncertainty of measurement) . (measurand) (dispersion) . . , (experimental standard deviation) . . 4 a , 2a, 2b B Bf ( ) Bjj ( j = 1) BRLjj CENELEC B0 BR Bz

17、 Bx,y,z r.m.s. Bmax, Bmin r.m.s. KS C IEC 61786:2008 8 C (stray capacitance) ce d (parallel plate) , D E Eii ( , i =1) ERLii CENELEC ER E0 E Ex,y,z r.m.s. Emax, Emin r.m.s. I Ii (incident light) ( ) It (transmitted light) ( ) I L (inductance) n (index of refraction) N ( ) Q r , (lead) R ( ) S ( ) t T V v(t) vp W Z (current injection circuit) i i (fraction) Bmax1 ( ) Bmax3 3 0 (permittivity) 0 (permeability) (angular frequency) 5 5.1 D.1 . . , KS C IEC 61786:2008 9 , . . . , . , , , . 5.1.1 (instrumental uncertainty)