10) AC Current
Frequency response
40Hz~1kHz
1kHz~10kHz
40Hz~1kHz
1kHz~10kHz
40Hz~1kHz
1kHz~10kHz
40Hz~1kHz
1kHz~10kHz
40Hz~1kHz
1kHz~10kHz
Accuracy
± (0.8%+10)
± (3%+50)
± (0.8%+10)
± (3%+50)
± (1.2%+10)
± (3%+50)
± (1.2%+10)
± (3%+50)
± (1.2%+10)
± (3%+50)
Resolution
0.01μA
0.1μA
1μA
10μA
1mA
Range
220μA
2200μA
22mA
220mA
20A
UT161E
Range
UT161B/UT161D
600.0μA
6000μA
60.00mA
600.0mA
6.000A
10.00A (UT161B)
20.00A (UT161D)
Resolution
0.1μA
1μA
10μA
0.1mA
1mA
10mA
10mA
Accuracy
± (1.2%+5)
± (1.5%+5)
± (2.0%+5)
Display: True RMS
Frequency response: 40Hz~500Hz (UT161B), 40Hz~1kHz (UT161D),
40Hz~10kHz (UT161E)
Accuracy guarantee (UT161B/UT161D): 5%~100% of 600.0μA range,
1%~100% of other ranges; open circuit allows least significant digit
≤
5
Accuracy guarantee (UT161E): 1%~100% of range at 40Hz~1kHz, 10%~100%
of range at 1kHz~10kHz (the minimum measured current at μA ranges is 30μA);
open circuit allows least significant digit
≤
10
The AC crest factor can be
≤
3.0 at 3000 counts, and can only be
≤
1.5 at
6000 counts. The additional error should be added according to the crest
factor of a non-sinusoidal wave as follows (UT161B/UT161D):
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
The AC crest factor can be
≤
2.0 at 10000 counts, and can only be
≤
1 at
22000 counts. The additional error should be added according to the crest
factor of a non-sinusoidal wave as follows (UT161E):
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
Frequency measurement range: 40Hz~500Hz (UT161B), 40Hz~1kHz (UT161D),
40Hz~10kHz (UT161E); input amplitude:
≥
50% of current range.
Duty ratio is for reference only.
Frequency accuracy: ± (0.1%+4); resolution: 0.1Hz (UT161B/UT161D)
Overload protection: Same as that for DC current
11) Frequency/Duty Ratio
Range
10Hz~220MHZ
0.1%~99.9%
Resolution
0.01Hz~0.01MHz
0.1%
Accuracy
± (0.01%+5)
± (2%+5)
UT161E
Range
10.00Hz~10.00MHZ
0.1%~99.9%
Resolution
0.01Hz~0.01MHz
0.1%
Accuracy
± (0.1%+4)
± (2%+5)
Frequency input amplitude:
≤
100kHz: 200mVrms
≤
input amplitude
≤
20Vrms
>100kHz~1MHz: 600mVrms
≤
input amplitude
≤
20Vrms
>1MHz (UT161B/UT161D): 1Vrms
≤
input amplitude
≤
20Vrms
>1MHz~40MHz (UT161E): 1Vrms
≤
input amplitude
≤
20Vrms
>40MHz (UT161E): Not specified
Duty ratio measurement is only applicable to square waves.
1Vpp
≤
input amplitude
≤
20Vpp
Frequency
≤
10kHz, duty ratio: 10.0% ~ 90.0%
Overload protection: 1000V
UT161B/UT161D
33
34
