User Manual

CHAPTER 3. OPERATION 19
Resistance
Q =
1
D
x
=
1
20.14
= 0.0496 ≤ 0.1 (3.19)
∴ R
acc
= A
e
(3.20)
R
acc
= ±0.6% + 0.3%Full Scale (3.21)
R = 18.194 ± (18.194 ∗ 0.006 + 30 ∗ 0.003)mΩ (3.22)
= 18.194 ± .199mΩ (3.23)
Voltage
V = 12.958V (3.24)
V
acc
= ±(0.05% + 0.1%F S) (3.25)
V = 12.958 ± ((0.0005 ∗ 12.958) + 0.001 ∗ 30) (3.26)
V = 12.958 ± 0.036V (3.27)
V
acc
= ±
0.036
12.958
∗ 100% = ±0.28% (3.28)
Capacitance Impedance |Z| and resistance accuracy are equivalent due to how the unit measures. Voltage
generated across the measurement terminals at a given current and frequency is determined and used to compute
resistance/impedance. D is greater than 0.1, so the accuracy correction is dominated by it.
C
acc
= Z
acc
∗
√
1 + D
2
(3.29)
Z
acc
= R
acc
= ±(0.6% ∗ Z + 0.3%F S) (3.30)
= ±(0.006 ∗ 18.194mΩ + 0.003 ∗ 30mΩ) (3.31)
= ±0.199mΩ (3.32)
C
acc
= 0.199 ∗
√
1 + D
2
∗ 100% (3.33)
= 0.199 ∗
√
1 + 20
2
(3.34)
= 3.98% (3.35)
C = 176mF ± (0.0398 ∗ 176mF ) = 176mF ± 7mF (3.36)