East Tester ET1090 User Manual page 20

 Temperature condition: 23℃±5℃
 Humidity condition: ≤65% R.H.
 Zero value adjustment : open circuit and short circuit zeroed before the test
 Warm-up time:> 30 minutes
 Calibration time: 12 months
C: 0.20%*(1+ Cx/Cmax+ Cmin/Cx )(1+Dx)(1+ks+kv+kf);
L: 0.20%*(1+ Lx/Lmax+ Lmin/Lx )(1+1/Qx)(1+ks+kv+kf);
Z: 0.20%*(1+ Zx/Zmax+ Zmin/Zx )(1+ks+kv+kf);
R: 0.20%*(1+ Rx/Rmax+ Rmin/Rx )(1+Qx)(1+ks+kv+kf);
D: 0.20%*(1+ Zx/Zmax+ Zmin/Zx )(1+Dx+Dx*Dx)(1+ks+kv+kf );
Q: 0.20%*(1+ Zx/Zmax+ Zmin/Zx )(Qx+1/Qx )(1+ks+kv+kf );
Wherein
1. L, C, R, Z are relative errors; D, Q, θ are absolute errors
2. Where the subscript is x, it is the measurement of this parameter; where the subscript is max, it
is the maximum value and where the subscript is min, it is the minimum value
3. Ks is the velocity factor, kv is the voltage factor, kf is the frequency factor
The maximum and minimum values of the measurement parameters that affect accuracy
Frequenc 100 120
y(Hz)
Cmax 800 667
Cmin 1500 1250
Lmax 1590 1325
Lmin 3.2 2.6
Z/Rmax 1
Z/Rmin 1.59
Frequenc 15K
y (Hz)
Cmax 5.3
Cmin 10
Lmax 10.6
Lmin 0.021
Z/Rmax 1
Z/Rmin 1.59
Wherein: the unit of Cmax is uF; the unit of Cmin is pF; the unit of Lmax is H; the unit of Lmin is
mH; the unit of Zmax / Rmax is MΩ; the unit of Zmin / Rmin is in Ω;
Measurement speed error factor ks:
Speed Mode Slow
ks 0
Frequency 100~1K
kf 0
Measurement speed error factor kv:
Level(mV) 100 300
kv 10 3
200 400 800
400 200 100
750 375 187
795 397.5 198.8
1.6 0.8 0.4
20K 40K
4 2
7.5 3.75
7.95 3.98
0.016 0.008
Medium Fast
1 8
2K~10K 15K
0.5 1
600 1000
1 0
1K 2K
80 40
150 75
159 79.5
0.32 0.16
50K 80K
1.6 1
3 1.87
3.18 1.99
0.0064 0.004
Measurement speed error factor kf:
20K 40K 50K
2
1500 2000
1 2
18
4K 8K 10K
20 10 8
37.5 18.7 15
39.8 19.9 15.9
0..08 0.04 0.032
100K
0.8
1.5
1.59
0.0032
80K 100K
3