Hangzhou Zhongchuang Electronics Co., Ltd.
19
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
）
Scope of impedance
Less than
1Ω
1Ω
to
10Ω
10Ω
to
100kΩ
100kΩ
to
1MΩ
Greater
than
1MΩ
10 to 30
0.3
0.15
0.15
0.2
0.5
30 to 10k
0.3
0.1
0.05
0.1
0.3
10k to 100k
0.5
0.1
0.05
0.15
0.5
Medium mode
Test
frequency
（
Hz
）
Scope of impedance
Less than
5Ω
5Ω to
10Ω
10Ω to
20kΩ
20kΩ to
100kΩ
Greater
than1MΩ
10 to 30
0.4
0.4
0.2
0.1
0.35
30 to 1k
0.8
0.2
0.15
0.15
0.3
1k to 30k
0.5
0.4
0.3
0.3
1
30k to 80k
1
0.6
0.3
0.6
3
80k to 100k
2
1
0.4
0.9
5
Fast mode
Test
frequency
（
Hz
）
Scope of impedance
Less than
1Ω
1Ω
to
10Ω
10Ω
to
100kΩ
100kΩ
to
1MΩ
Greater
than
1MΩ
10 to 30
0.6
0.3
0.3
0.4
1
30 to 10k
0.6
0.2
0.1
0.2
0.2
10k to 30k
1
0.2
0.1
0.3
1
30k to 100k
2
0.6
0.3
0.6
2
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:
