Voltech AT5600, Руководство пользователя

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C H A P T E R 1 0 – S P E C I F I C A T I O N S
AT5600 User Manual 98-119 issue 14
Page 239
10.2.31. ACVB Test
The accuracy of the test voltage is 3%.
The accuracy of the current measurement is based on the chosen test conditions,
and is given by:
𝐴
𝑇
= 𝐴
𝑅
+ 𝐴
𝐶
+ 𝐴
𝑉
+ 𝐴
𝐼
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 (%)
where:
𝐴
𝑅
= 3.00 %
𝐴
𝐶
= 0.08 % + (0.001 % ∗ 𝐹
𝑀
)
𝐴
𝑉
= 3.0 % + (
500 %
𝑉
𝑀
)
𝐴
𝐼
=
0.001 %
𝐼
𝑀
where:
V
M
is the actual voltage (Vrms)
I
M
is the maximum test current (Arms)
F
M
is the test frequency (Hz)
Special Notes: Under certain test conditions the measured current will be higher
than the allowed minimum limit due to parasitic effects on the AT5600 and any
connected fixture system. This works out to be 12.5 uA at
2.5 KV @ 50Hz .
The maximum parasitic effect created by the AT5600 with every node being used
for the test can be calculated by:
𝐼
𝑃
= 𝑉
𝑀
(4.614 ∗ 10
−10
+ 9.1 ∗ 10
−11
𝐹
𝑀
)
where:
I
M
is the measured current (A)
F
M
is the test frequency (Hz)
V
M
is the measured voltage (V)