76 degrees and at 77 degrees. In order to evaluate e, using this actual table of 

 R vs p, equation (12) was modified for computer use as follows: 



N 





e.— > VR (16) 



n=0 



Substituting the value of U from equation (12) 



J- y ± ru 2 + [;2)'/2 (17) 



N+l Z^ ^ '^ 



where 



(7^ = 172 + ti^ sin («A) (18) 



Ur =Ui + (J„, cos (M) (19) 



R = function of p from the table 



/ (7,. \ / Ur sin G 



= positive- constant 



In equation (17), the positive sign is used if U^. > and the negative sign if U^, < 0. 



The value of e was computed for some tyj^ical values using A = 0.1 degree 

 and N = 3600. This is the actual mean output of the meter. The ideal mean output 

 along the meter axis would simply be U^ sin G. The results are plotted in figure 10. 

 The ratio of the actual mean output to the ideal mean output is used as the ordinate 

 and 9 as the abscissa. The asymmetric nature of the input and the noncosine meter 

 meter response cause the errors in the mean output in the figure to range from 9 to 

 23 percent. However, it should be noted from the curves that these errors are main- 

 ly a function of and almost independent of Uj and U2- This suggests the possi- 

 bility of correcting errors of this type. A more detailed analysis should be defer- 

 red until the exact nature of the response curve for an electromagnetic meter is 

 determined. 



20 



