Voltech AT3600 - Page 381

VOLTECH AT3600 USER MANUAL SPECIFICATION
SPECIFICATION VPN 98 - 024 PAGE 8.1.23.
Z AND ZB TEST
The accuracy is given as:
where
A
T
is the total accuracy (%)
A
R
is the basic relative accuracy (%)
A
C
is the calibration accuracy (%)
A
V
is the correction for voltage level (%)
A
I
is the correction for current level (%)
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
C
= 0.08% + (0.0000001% x F
M
)
A
V
= 0.08% + (0.000003% / V
M
)
A
I
= 0.08% + (0.0000003% / I
M
) + (0.03% x I
B
/ I
M
)
where
F
M
is the measurement frequency (Hz)
V
M
is the measured voltage (V)
I
M
is the measured current (A)
I
B
is the bias current (A).
A = A
T
R
CV
I
+A +A +A