Instek Digital LCR-821 - Range Tables and Accuracy Calculation Example; C-D Accuracy Calculation Example

LCR-800 Series User Manual
42
Table A: (for range 4)-Kc
Voltage
Frequency
0.03≦V＜0.1 0.1≦V＜0.25 0.25≦V＜11≦V≦1.265
0.012≦F＜0.03
70 20 10 7
0.030≦F＜0.1
50 13 6 3
0.1≦F＜0.25
35942
0.25≦F＜1
25621
1 15410
1＜F≦3
17632
3＜F≦6
25 15 10 6
6＜F≦10
60 30 20 15
10＜F≦20
Not specified 100 65 50
20＜F≦50
50＜F≦200
This range is not used above 20kHz
F: test frequency in kHz
Table B-1: Range Hold
Inductor Capacitor Resistor/Impedance
Component
Range
Max Min Max Min Max Min
Range1 16mH /f 1mH /f 25uF /f 1.6uF /f
100Ω 6.25Ω
Range2 256mH /f 16mH /f 1600nF /f 100nF /f
1.6kΩ 0.1kΩ
Range3 4100mH /f 256mH /f 100nF /f 6.4nF /f
25.6kΩ 1.6kΩ
Range4* 65H/f 4.1H /f 6400pF /f 400pF /f
410kΩ 25.6kΩ
f = test frequency in kHz
*: This range is not used above 20kHz
Table B-2: Auto Range
Inductor Capacitor Resistor/Impedance
Component
Range
Max Min Max Min Max Min
Auto range 65H /f** 1mH /f 25uF /f 400pF /f **
410kΩ** 6.25Ω**
**: Above 20kHz, Cmin = 6.4 nF/f ,and Lmax = 4100mH/f
f = test frequency in kHz.
LCR-800 Series User Manual
43
Example of C-D Accuracy Calculation
Measurement Conditions
Frequency: 1 kHz
Test Voltage: 1V
Test Speed=SLOW
Constant Voltage=OFF
R.H=OFF
C measure: 1 μF
D measure: 0.0009
Then:
C Error = 0.03% + [0.02% x (1+ Ka) x (1+0.0009) x (1+Kb+Kc)]
=0.03%+[0.02% x (1+0) x (1.0009) x (1+0+0)]
=0.05%
±2 counts
D Error = 0.0003+[0.0002 x (1+Ka) x (1+0.0009+0.0009²) x (1+Kb+Kc)]
=0.0003+[0.0002 x (1+Ka) x (1+0.0009+(0.0009²) x (1+Kb+Kc)]
=0.0003 + [0.0002 x (1+0) x (1.0009) x (1+0+0)]
=0.0005
±2 counts
Z Error = C Error = 0.05%
θ Error =(180/π) x (Ze/100) =57.3∘x (0.05/100)=0.03∘