Instek Digital LCR-821 - Secondary Readout Accuracy Formulas; Accuracy Formulas and Range Tables; Secondary Readout Accuracy: R with C; Secondary Readout Accuracy: R with L

LCR-800 Series User Manual
40
z The formulas for secondary readout accuracy of R with C.
Error
D≧1 2count + 0.02%[(1+Ka)
*
or (Rx/Rmax)
*
or (Rmin/Rx)
*
] (1+ 1/│D│)(1+Kb+Kc)+0.03%
D≦1 2count + 0.02%[(1+Ka)
**
or (Cx/Cmax)
**
or (Cmin/Cx)
**
] (1+ 1/│D│)(1+Kb+Kc)+0.03%
z The formulas for secondary readout accuracy of R with L.
Error
Q≦1 2count + 0.02%[(1+Ka)
*
or (Rx/Rmax)
*
or (Rmin/Rx)
*
] (1+ | Q│)(1+Kb+Kc)+0.03%
Q≧1 2count + 0.02%[(1+Ka)
**
or (Lx/Lmax)
**
or (Lmin/Lx)
**
] (1+| Q│)(1+Kb+Kc)+0.03%
*: 1. If Rx ≧ Rmax, please select (Rx/Rmax)
2. if Rx
≦ Rmin, please select (Rmin/Rx)
3. if Rmin<Rx<Rmax, please select (1+Ka)
**: 1. If Cx
≧ Cmax, please select (Cx/Cmax)
2. if Cx
≦ Cmin, please select (Cmin/Cx)
3. if Cmin<Cx<Cmax, please select (1+Ka)
Where
Ka: Constant Voltage factor
Constant Voltage On , Ka = 2
Constant Voltage Off, Ka = 0
Kb: Test Speed factor
Speed = SLOW , Kb = 0
Speed = MEDIUM , Kb = 3
Speed = FAST ,Kb = 10
Kc: Frequency & RMS Voltage factor (refer to Table A)
X: X is value of the component being tested.
Y: Y is range constant (refer to Table B)
LCR-800 Series User Manual
41
Rx and Cx are value of the component being tested.
Rmax, Rmin, Cmax and Cmin are ranges constant (refer to Table B).
Table A: (for range 1,2,3) –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
35 12 9 7
0.030≦F＜0.1
30 8 5 3
0.1≦F＜0.25
25 6 3 2
0.25≦F＜1
20 5 2 1
114410
1＜F≦3
15 5 2 1
3＜F≦6
15 6 3 2
6＜F≦10
15 8 5 3
10＜F≦20
20 10 6 5
20＜F≦50
30 22 18 15
50＜F≦100
50 40 35 30
200 Nonuse 80 50 45
F: test frequency in kHz