Voltech AT3600 - Page 375

VOLTECH AT3600 USER MANUAL SPECIFICATION
SPECIFICATION VPN 98 - 024 PAGE 8.1.17.
WATT AND STRW TESTS
The accuracy for the test voltage is given by:
The accuracy for the wattage measurement is given by:
where
A
R
is the basic relative accuracy (%)
A
T
is the total accuracy (%)
A
C
is the calibration accuracy (%)
A
V
is the correction for voltage level (%)
A
I
is the correction for current level (%)
A
P
is the correction for power factor (%)
where
F
M
is the test frequency (kHz)
V
M
is the measured voltage (V)
I
M
is the measured current (A)
PF is the power factor of the load
where
W is the measured wattage (W)
VA is the product of the test voltage and magnetising current
A = A
T
R
CVIP
+A +A +A +A
A(V = 2%
TEST
)
A =
C
0.01% / (
F
M
+0.01)
A =
V
0.05%
M
+ (0.0001% / ) V
A =
I
0.05%
M
+ (0.000002% / ) I
A =
P
1% ( / x () 1-PF ) PF
2
P
F = W / VA