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_____________________________________________________________________________________________
7.5 Test Accuracy
______________________________________________________________________________________________
Test accuracy = Basic accuracy x C x D + E
C: Test speed coefficient
D: Cable length coefficient
E: Temperature coefficient
(1 k
Ω
range or more)
B x |10 x
Z
x[
Ω
] - Range[
Ω
]|
Basic accuracy Z(%) or
θ
( ) =
A
＋
____________________
Range[
Ω
]
(100
Ω
range or less)
B x |Range[
Ω
] -
Z
x[
Ω
]| x 10
Basic accuracy Z(%) or
θ
( ) =
A
＋
____________________
Range [
Ω
]
Z
x: sample of |
Z
|
The impedance of the measurement sample (Zx) is taken to be either
the measured value, or the value calculated from the following
expressions (refer to "Conversion Table from C and L to |
Z
|").
|
Z
x| (
Ω
)
ω
L (H) (
θ
90
)
1/
ω
C (F) (
θ
-90
)
R
(
Ω
) (
θ
0
)
7.5 Test Accuracy
The test accuracy is calculated from a basic accuracy, which is based on the
accuracy for impedance Z (%) and phase angle
θ
( ), and the following
coefficients.
1. Basic accuracy
The basic accuracy is calculated from a value A and B from the accuracy
coefficient table, which is based on the measurement frequency (*1), the
measurement range, and the measurement signal level (*2).
(*1): When the measurement frequency is 1.001 MHz or more,
(f [MHz] +3)/4 must be multiplied to the basic accuracy.
(*2): In CV or CC mode, the accuracy varies according to the
test signal level.
Basic accuracy conditions:
Using the 9262 TEST FIXTURE
Test speed: SLOW2
Cable length coefficient: 0 m
Temperature and humidity: 23 5
, 80 %RH or less
Operation 60 minutes after the power is turned on
Open circuit compensation and short circuit compensation both being
performed
If the test condition is different from above, the coefficients corresponding to
the following settings are calculated from each table and must be multiplied
(C, D) or added (E) to the basic accuracy.
