6
1.2.2 Measurement parameters
Model
Parameter
TH2810B
L-Q, C-D, R-D, Z-Q
TH2618B
C-D, R-D
TH2775B
L-Q, R-Q
Table 1-1.Measurement Parameters
L:
inductance
C:
capacitance
R:
resistance
Z: impedance
Q: quality factor
D: tangent of dissipation angle
The instrument provides two kinds of equivalent circuits, series connection and
parallel connection, in which Z, D and Q have the same values while C, L and R
have different values. The conversion relations between the two equivalent
circuits are discussed in Table 2-4 Conversion Table of Circuits in Series and
Parallel Connections on P 2-11.
1.2.3 Display range
L: 0.01µH ~ 99999H
C: 0.01pF ~ 99999µF
R/Z: 0.0001
Ω
~ 99999M
Ω
D: 0.0001 ~ 9.999
Q: 0.0001 ~ 9999
Δ
%: -9999% ~ 9999%
1.2.4 Measurement accuracy
C: 0.1% (1+Cx/Cmax+Cmin/Cx) (1+Dx) (1+ks+kv+kf);
L: 0.1% (1+Lx/Lmax+Lmin/Lx) (1+1/Qx) (1+ks+kv+kf);
Z: 0.1% (1+Zx/Zmax+Zmin/Zx) (1+ks+kv+kf);
R: 0.1% (1+Rx/Rmax+Rmin/Rx) (1+Qx) (1+ks+kv+kf);
D: ±0.0010 (1+Zx/Zmax+Zmin/Zx) (1+Dx+Dx
2
) (1+ks+kv+kf);
Q: ±0.0015 (1+Zx/Zmax+Zmin/Zx) (Qx+1/Qx) (1+ks+kv+kf).
Notes: 1. D and Q are absolute deviations and others are percent deviations,
Dx=1/Qx;
2. Those with subscript x mean measurement values of the parameters;
those with subscript max mean maximum values and min mean
minimum values;
3. ks is the speed factor; kv is the level factor and kf is the frequency
factor;
4. In order to gain high measurement accuracy, you should make open
and short correction again when the test fixture or conditions are
changed.
