660 



ELECTRICAL MEASUREMENTS 



B 3 = 1.78 

 B 9 = -0.17 



Difference ( + 1.96)-, 



B> = 0.39 

 B, =0.13 



Difference.. 

 Sum... 



t.fl 



i = - 1.720 



= - 0.119 



Difference.. 



Difference .... 

 From curve. 



( - 1.601), 



[ + 5.8/J1.414 = + 5.37 



- (i/3 - 2/ 9 ) = -i- 6.40 



> 2 + (1.72) 2 = 

 32.678 



C, = \/(0.204)*+(1.78) 2 = 



1.798 



C B = V(0.124) 2 + (0.391) 2 = 



0.410 



C 7 = V(0087) 2 + (0.134) 2 = 



0.160 



C, =V(0.055) 2 +(0.170) 2 = 



0.179 



Cn = V(0.022p + (0.119) 2 = 



0.121 



tan * j^ -tan l +32.533 = 



- 3.02 



_, ^ +1.78 



tan Az = tan +0 ; 204 = 



+ 83.5 



B b +0.391 



tan~ l ^~ = tan l Ho^24 = 



+ 107.6 



, B, , +0.134 



tan ~ Z~ 7 = tan " +0.0^87 = 



+ 57.0 



B 9 -0.170 _ 



tan " 1 I^ = tan l +0.055 = 



- 72.1 



", -0.119 _ 



- - tan 1 qf7 0<022 - 



-79.5 



Therefore the equation of the curve is 



e = 32.678 sin (<d - 3.02) + 1.798 sin 3(J + 27.8) 

 + 0.410 sin 5(ut + 21.52) + 0.160 sin 7U + 8.14) 

 + 0.179 sin 9(w^ - 8.0) + 0.121 sin 11(* - 7.2) 



