AMETEK MX15 Series - Manual (Page 129)

User Manual - Rev M California Instruments
MX15 129
MX15 R resistive Xl inductive
Controller (7003-718-5) R121 R122
Table 6-4: Programmable Z adjustment pots
Definitions:
V
NL
= Measured RMS voltage under no load.
V
L
= Measured RMS voltage under load
I = Measured RMS current.
F = Source frequency (50 Hz).

= Phase angle shift between load and no load conditions. Record phase angle
from phase meter under NL and L condition and determine phase shift.
Formulas to calculate R and L component of output impedance:
R = ( V
NL
* cos(

) - V
L
) / I
X
L
= ( V
NL
* sin(

)) / I
L = X
L
/ (2 * Pi * F)
Table 6-5: Formulas to calculate R and L