East Tester ET430 Instructions For Use Manual page 23

Dx-- D measured
Xx-- X measured (Ω)
De -- relative accuracy of D
f --test frequency (Hz)
Cx—measured C (F)
Lx—measured L (H)
The accuracy of ESR
ESR is the equivalent series resistance like Rs.
Basic accuracy
The basic accuracy of the instrument is 0.2; with the changes of the test frequency
and the impedance of DUT, the basic accuracy will decline, the basic accuracy and its
application are shown in the table below.
Slow mode
Test
frequency
（Hz）
10 to 30
30 to 10k
10k to 100k
Medium mode
Test
frequency
（Hz）
10 to 30
30 to 1k
1k to 30k
30k to 80k
80k to 100k
Fast mode
Test
frequency
（Hz）
10 to 30
30 to 10k
10k to 30k
30k to 100k
When the test level is less than 0.75V and greater than 0.5V, the basic accuracy is
shown in the above table; in other cases, it needs to be multiplied by the level correction
factor. The level correction factor is shown below:
Hangzhou Zhongchuang Electronics Co., Ltd.
Scope of impedance
1Ω
Less than
to
1Ω
10Ω
0.3 0.15
0.3 0.1
0.5 0.1
Scope of impedance
Less than 5Ω to
5Ω 10Ω
0.4 0.4
0.8 0.2
0.5 0.4
1 0.6
2 1
Scope of impedance
1Ω
Less than
to
1Ω
10Ω
0.6 0.3
0.6 0.2
1 0.2
2 0.6
10Ω 100kΩ
to to
100kΩ 1MΩ
0.15 0.2
0.05 0.1
0.05 0.15
10Ω to 20kΩ to
20kΩ 100kΩ
0.2 0.1
0.15 0.15
0.3 0.3
0.3 0.6
0.4 0.9
10Ω 100kΩ
to to
100kΩ 1MΩ
0.3 0.4
0.1 0.2
0.1 0.3
0.3 0.6
19
Greater
than
1MΩ
0.5
0.3
0.5
Greater
than1MΩ
0.35
0.3
1
3
5
Greater
than
1MΩ
1
0.2
1
2