UNI-T UT 61+ Series User Manual page 15

2) AC Voltage
UT61E+
Range
Resolution
220.00mV 0.01mV
2.2000V 0.1mV
22.000V 1mV
220.00V 10mV
1000.0V 0.1V
UT61B+/UT61D+
Range
60.00mV
600.0mV
6.000V
60.00V
600.0V
1000V
LoZ ACV 600.0V (UT61D+)
LoZ ACV 1000V (UT61D+)
Input impedance: About 10MΩ
Display: True RMS
Frequency response: 40Hz~500Hz (UT61B+), 40Hz~1kHz (UT61D+),
40Hz~10kHz (UT61E+)
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 (UT61B+/UT61D+):
27
Frequency response Accuracy
± (1.0%+10)
40Hz~1kHz
± (1.5%+30)
1kHz~10kHz
± (0.8%+10)
40Hz~1kHz
1kHz~10kHz ± (1.2%+50)
40Hz~100Hz (LPF) ± (1.2%+50)
± (0.8%+10)
40Hz~1kHz
± (1.2%+50)
1kHz~10kHz
40Hz~100Hz (LPF) ± (1.8%+50)
± (0.8%+10)
40Hz~1kHz
± (2.0%+50)
1kHz~10kHz
40Hz~100Hz (LPF) ± (2.0%+50)
± (1.2%+10)
40Hz~1kHz
1kHz~10kHz
± (3.0%+50)
40Hz~100Hz (LPF)
Accuracy
Resolution
± (1.2%+5)
0.01mV
± (1.2%+5)
0.1mV
± (1.0%+3)
0.001V
± (1.0%+3)
0.01V
0.1V ± (1.0%+3)
± (1.2%+5)
1V
0.1V ± (2.0%+5)
± (2.0%+5)
1V
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 (UT61E+):
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 (UT61B+), 40Hz~1kHz (UT61D+),
40Hz~10kHz (UT61E+); input amplitude: ≥10% of voltage range Duty ratio is
for reference only.
Accuracy guarantee (UT61B+/UT61D+): 2%~100% of 60mV range, 1%~100%
of other ranges; short circuit allows least significant digit ≤3
Accuracy guarantee (UT61E+): 1%~100% of range at 40Hz~1kHz, 10%~100%
of range at 1kHz~10kHz; short circuit allows least significant digit ≤10
Max input voltage: 1000V (if the voltage is >1000V , the red indicator light will
be on and the buzzer will sound an alarm; if the voltage is >1010V, the LCD
will display "OL")
Overload protection: 1000V
3) AC+DC Voltage (UT61E+)
UT61E+
Range Resolution
2.2000V 0.1mV
22.000V 1mV
220.00V 10mV
1000.0V 0.1V
AC voltage display: True RMS
Input impedance: About 10MΩ
Accuracy guarantee: 10%~100% of range
For AC voltage, short circuit allows least significant digit ≤200
Overload protection: 1000V
Frequency response Accuracy
± (1.8%+70)
40Hz~500Hz
40Hz~500Hz ± (1.8%+70)
± (1.8%+70)
40Hz~500Hz
± (4.0%+70)
40Hz~500Hz
28