Voltech AT3600 - Page 364

SPECIFICATION VOLTECH AT3600 USER MANUAL
PAGE 8.1.6. VPN 98 - 024 SPECIFICATION
QL AND D TESTS
The accuracy of measuring Q factor and D factor is given as:
A
T
= A
R
+ A
I
+ A
QD
where
A
T
is the basic total accuracy (%)
A
R
is the basic relative accuracy (%)
A
I
is the correction for current level (%)
A
QD
is the correction for Q or D factor (%)
The value of A
R
is given in the table in section 1.1 of this chapter.
The values of the other factors are given below:
A
I
= 0.08% + (0.0001%/Im)
A
QD
= 0.2% x (Q
M
+ (1/ Q
M
)) (Q factor)
A
QD
= 0.2% x (D
M
+ (1/ D
M
)) (D factor)
where:
Q
M
is the Q factor of the measured impedance
D
M
is the D factor of the measurement impedance
I
M
is the measured current (A)