5
U1251A AC SPECIFICATIONS
FUNCTION RANGE RESOLUTION
ACCURACY ± (% of reading + No. of Least Signifi cant Digit)
FREQUENCY
30 Hz ~ 45 Hz 45 Hz ~ 1 kHz 1 kHz ~ 10 kHz 10 kHz ~ 30 kHz
TRUE RMS AC
VOLTAGE
50.000 mV 0.001 mV
1.0+60
0.6+40
1.0+40 1.6+60
500.00 mV 0.01 mV
0.6+25
1000.0 mV 0.1 mV
1.0+25
1.6+405.0000 V 0.0001 V
50.000 V 0.001 V
500.00 V 0.01 V 1.6+40
[1]
1000.0 V 0.1 V 0.6+40 1.0+40 N/A
FUNCTION RANGE RESOLUTION
ACCURACY ± (% of reading + No. of Least Signifi cant Digit)
FREQUENCY
30 Hz ~ 45 Hz 45 Hz ~ 2 kHz 2 kHz ~ 20 kHz
AC CURRENT
500.00 µA
[2]
0.01 µA 1.5+50
0.8+20
3.0+80
5000.0 µA 0.1 µA
1.5+40 3.0+60 50.000 mA 0.001 mA
440.00 mA 0.01 mA
5.0000 A 0.0001 A
2.0+40(4)
3+60,
<3 A/5 kHz
10.000 A
[3]
0.001 A
U1252A AC SPECIFICATIONS
FUNCTION RANGE RESOLUTION
ACCURACY ± (% of reading + No. of Least Signifi cant Digit)
FREQUENCY
30 Hz ~ 45 Hz 45 Hz ~ 1 kHz 1 kHz ~ 10 kHz 10 kHz ~ 20 kHz 20 kHz~100 kHz
[5]
TRUE RMS AC
VOLTAGE
50.000 mV 0.001 mV
1.5+60
0.4+40 0.7+40
0.75+40 3.5+120
500.00 mV 0.01 mV
0.4+25 0.4+25
1000.0 mV 0.1 mV
5.0000 V 0.0001 V
50.000 V 0.001 V
500.00 V 0.01 V 1.5+40 3.5+120
[1]
1000.0 V 0.1 V 0.4+40 0.4+40 1.5+40
[1]
N/A
FUNCTION RANGE RESOLUTION
ACCURACY ± (% of reading + No. of Least Signifi cant Digit)
FREQUENCY
30 Hz ~ 45 Hz 45 Hz ~ 1 kHz 1 kHz ~ 20 kHz 20 kHz~100 kHz
[5]
AC CURRENT
500.00 µA
[2]
0.01 µA
1.0+20
0.7+20
0.75+20
5.0+80
5000.0 µA 0.1 µA
50.000 mA 0.001 mA
440.00 mA 0.01 mA 1.5+20
5.0000 A 0.0001 A
1.5+20
[4]
3+60,
<3 A/5 kHz
N/A
10.000 A
[3]
0.001 A
[1] The input signal is lower than the product of 20,000,000 V-Hz (product of voltage and frequency).
[2] Input current >35 mArms.
[3] Current can be measured from 2.5 A up to 10 A continuously. An additional 0.5% needs to be added to the specifi ed accuracy if the signal measured is in the range
of 10 A ~ 20 A for 30 seconds maximum. After measuring a current of >10 A, leave the meter to cool down for twice the measuring time used before application of
low current measurement.
[4] Input current < 3 Arms.
[5] The additional error to be added as frequency >20 kHz and signal input<10%of range: 3 counts of LSD per kHz.
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