10 | Keysight | E4980A Precision LCR Meter 20 Hz to 2 MHz, E4980AL Precision LCR Meter 20 Hz to 300 kHz/500 kHz/1 MHz – Data Sheet
Q accuracy (when Q x De < 1)
Q accuracy Qe is given as:
Equation 10.
(Qx2 × De)
Q e = ± —————————————
(1 Qx × De)
Qx
De
Measured Q value
Relative D accuracy
θ accuracy
θ accuracy θe is given as:
Equation 11.
180 × Ae
θe = —————————— ( d e g )
ꢀ
ꢀ
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀπꢀ×ꢀ100
Ae
Relative accuracies of |Z|, |Y|, L, C, R, X, G, and B
G accuracy (when Dx ≤ 0.1)
G accuracy Ge is given as:
Equation 12.
Ge = Bx × De
(S)
1
ꢀ
ꢀ
ꢀ
ꢀ
Bxꢀ=ꢀ2πfCxꢀ=ꢀꢀ——————ꢀꢀꢀꢀ
ꢀ
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ2πfLxꢀ
Ge
Dx
Bx
De
f
Relative G accuracy
Measured D value
Measured B value
Relative D accuracy
Test frequency (Hz)
Measured C value (F)
Measured L value (H)
Cx
Lx
Rp accuracy (when Dx ≤ 0.1)
Rp accuracy Rpe is given as:
Equationꢀ13.ꢀꢀ
ꢀ
ꢀꢀRpxꢀ×ꢀDeꢀꢀꢀꢀꢀꢀꢀꢀ(Ω)
R p e = ± —————————
Dx
De
Rpe
Rpx
Dx
Relative Rp accuracy
Measured Rp value (Ω)
Measured D value
De
Relative D accuracy
Rs accuracy (when Dx ≤ 0.1)
Rs accuracy Rse is given as:
Equationꢀ14.ꢀꢀ
Rseꢀ=ꢀXxꢀ×ꢀDeꢀ
ꢀꢀꢀꢀꢀꢀꢀꢀꢀ(Ω)
1
ꢀ
ꢀ
ꢀ
ꢀ
Xxꢀ=ꢀꢀ—————– ꢀꢀ=ꢀ2πfLx
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ2πfCx
Rse
Dx
Xx
De
f
Relative Rs accuracy
Measured D value
Measured X value (Ω)
Relative D accuracy
Test frequency (Hz)
Measured C value (F)
Measured L value (H)
Cx
Lx
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