UNI-T LCR-1000 series, Operation Manual

Page: 22 / 31

When measuring level correction level ArB (Refer to table 3-3), select measuring accuracy A according to
Fig.3-1, the basic accuracy after level correction is A multiplied by Ar. Here, V
S
is voltage of test signal.
Table 3-1
Test Signal Voltage
V
S
Accuracy Correction Factor
Ar
0.1V 2.5
0.3V 1.5
1V 1
Table 3-4 Impedance Scaling Factor K
a
and K
b
Speed
Frequency K
a
(Zm<500
 ）
K
b
（
Zm>500
 ）
Medium
Slow
fm

100Hz
)
100
1 )(
200
1 )(
10 1
(
3
m s m
f V Z
 


)
100
1 )(
70
1 )( 10 1 (
9
m s
m
f V
Z
   
100Hz

fm
≤100kHz
)
200
1 )(
10 1
(
3
s m
V Z

 
)
70
1 )( 10 1 (
9
s
m
V
Z
 

fm

100kHz
)
200
2 )(
10 1
(
3
s m
V Z

 
)
70
1 )( 10 3 (
9
s
m
V
Z
 

Fast
fm

100Hz )
100
1 )(
400
1 )(
10 5 . 2
(
3
m s m
f V Z
 
 
)
100
1 )(
100
1 )( 10 2 (
9
m s
m
f V
Z
   
100Hz

fm
≤100kHz
)
400
1 )(
10 5 . 2
(
3
s m
V Z

 
)
100
1 )( 10 2 (
9
s
m
V
Z
 

fm

100kHz
)
400
2 )(
10 5 . 2
(
3
s m
V Z



)
100
1 )( 10 6 (
9
s
m
V
Z
  
Note:
fm: measured frequency, [Hz]
Zm: measured impedance of DUT, [

]
Vs: voltage of test signal, [mV
rms
]
Table 3-5 Temperature Factor K
c
Temperature (
℃
)
5 8 18 28 38
K
c
6 4 2 1 2 4
Table 3-6 Calibration Interpolation Factor Kf
Test frequency Kf
Typical frequency (Direct calibration) 0
Non-typical frequency (Interpolation
calibration) 0.0003
Note: So far frequency points of all models are typical frequencies.
Table 3-7 Cable Length Factor
Test frequency
Cable Length
0m
1m 2m