Tonghui TH2840 Series - Page 134

126
8kHzfm
≤150kHz
)
70
1)(103(
9
s
m
V
Z 

150kHzfm
≤1MHz
)
200
3)(
101
(
3
sm VZ



)
70
1)(1010(
9
s
m
V
Z 

Fast
f
m
1.2kHz
msm fVZ
100
)
400
1)(
105.2
(
3



ms
m
fV
Z
100
)
100
1)(106.0(
9


1.2kHzfm
≤8kHz
)
400
1)(
105.2
(
3
sm VZ



)
100
1)(102(
9
s
m
V
Z 

8kHzfm
≤150kHz
)
100
1)(106(
9
s
m
V
Z 

150kHzfm
≤1MHz
)
400
2)(
105.2
(
3
sm VZ



)
100
1)(1020(
9
s
m
V
Z 

Where, f
m
is the test frequency and the unit is [Hz].
The unit of the tested impedance is [Ω].
The unit of the test signal voltage is [mV
rms
].
Ka is used when the impedance is less than 500Ω, Kb is invalid.
Kb is used when the impedance is greater than 500Ω, Ka is invalid.
8.3.11.3 Table C when the cable length is extended, K
a
should add the following value:
Cable length L [m]
0
1
2
Added value of Ka
0
0.0005
0.0010
8.3.11.4 Table D when the cable length is extended, K
b
should multiply the following value:
Cable length L [m]
0
1
2
fm≤100kHz
1
1+5×fm
1+10×fm
100kHz<fm≤300kHz
1
1+2×fm
1+4×fm
300kHz<fm≤1MHz
1
1+0.5×fm
1+1×fm
Where, f
m
is the test frequency and the unit is [MHz].
8.3.11.5 Table E calibrated interpolating factor K
C
Test frequency
K
c
Direct calibrated frequency
(listed in Table F)
0
Other frequency
0.0003