ET35 Series Digital Bridges(LCR)Operating Instructions
Hangzhou Zhongchuang Electron Co., Ltd.
86
6.1.5 Measurement accuracy
Measurement accuracy includes the errors in measurement stability, temperature
coefficient, linearity, and repeatability measurement.
The test of measurement accuracy of the instrument shall be conducted under the
following conditions:
preheating time: ≥30 minutes.
correctly conduct the clearing of open / short circuit correction after preheating
DC bias is turned off.
the instrument works within the range of "AUTO" to select the correct
measurement range.
Accuracy of |Z|, |Y|, L, C, R, X, G and B (the accuracy of L, C, X and B is applied
when Dx≤0.1, and the accuracy of R and G is applied when Qx≤0.1)
The relative accuracy Ae is
[%]
*
)
Kl
z
*
100
(
c
e
Kt
K
Ab
A
A
Ac correction accuracy
Ab basic accuracy
Kz impedance scaling factor
Kl cable length factor
Kt temperature factor
Accuracy of D
The accuracy of D—De is
When Dx≤0.1:
100
/
e
Ae
D
Dx D measured
Ae the relative accuracy of | Z |, | Y |, L, C, R, X, G, and B
When Dx> 0.1: (1 + Dx) multiplied by De
The accuracy of Q (when Q * De<1)
The accuracy of Q—Qe is:
De
Qx
De
Qx
Q
*
1
*
e
2
Qx Q measured
De relative accuracy of D
Accuracy of θ
The accuracy of θ—θe is
Содержание ET3501
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