East Tester ET430 - Page 24

Hangzhou Zhongchuang Electronics Co., Ltd.
20
Accuracy factor
This section contains all the accuracy correction factors: Impedance scaling factor Kz,
temperature factor Kc, calibration factor Kf, cable length factor Kl.
Frequen
cy/Hz
Kz（Zm<500Ω）
Kz（Zm≧500Ω）
Less
than
100
)
100
1)(
200
1)(
||
10*1
(
3
fmVsZm


)
100
1)(
70
1)(10*1(|Zm|
9
fmVs


100
to 100k
)
200
1)(
||
10*1
(
3
VsZm


)
70
1)(10*5(|Zm|
9
Vs


Greater
than
100k
)
200
2)(
||
10*1
(
3
VsZm


)
70
1)(10*1(|Zm|
8
Vs


Note: fm in the table indicates the frequency of the test signal （ unit ： Hz ）， Zm is the
impedance (unit: Ω), Vs the test level (unit: mV)
Temperature factor Kc
)20(*25.0c  TK
(When Kc <1, Kc = 1)
T--room temperature
Calibration factor Kf
Range
Frequency /Hz
10 to 100
100 to 100k
10kΩ
0
0
1kΩ、100kΩ
0.02
0.01
100Ω
0.04
0.03
Cable length factor Kl
0 meter
1 meter
2 meters
4 meters