Technical data

Specifications 7
Agilent U1251B/U1252B User’s and Service Guide 145
U1252B AC Specifications
Ta bl e 7 - 3 U1252B AC Accuracy ± (% of reading + No. of Least Significant Digit)
[1] The additional error to be added as frequency >20 kHz and signal input<10% of range: 3 counts of LSD per kHz.
[2] Input impedance: Refer to Ta b l e 7 - 6 .
[3] The input signal is lower than the product of 20,000,000 V-Hz (product of voltage and frequency).
[4] Input current >35 μArms.
[5] Current can be measured from 2.5 A up to 10 A continuously. Add 0.5% to the specified accuracy if the signal measured
is in the range of 10 A to 20 A and for a period of up to 30 seconds. After measuring current >10 A, leave the meter to cool
down for a period that is twice the measuring time used before application of low current measurement.
[6] Input current < 3 Arms.
[7] Crest factor ≤ 3.0 at full scale, 5.0 at half scale except the 1000 mV and 1000 V ranges where it is 1.5 at full scale, 3.0 at
half scale. For non-sinusoidal waveform, add 0.1% of reading ± 0.3% of range.
Function Range Resolution
Frequency
20 Hz –
45 Hz
45 Hz –
1 kHz
1 kHz –
10 kHz
10 kHz –
20 kHz
20 kHz –
100 kHz
[1]
Tru e RM S
AC Voltage
[2][7]
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 1.5+60 0.4+25 0.4+25 0.75+40 3.5+120
1000.0 mV 0.1 mV 1.5+60 0.4+25 0.4+25 0.75+40 3.5+120
5.0000 V 0.0001 V 1.5+60 0.4+25 0.6+25 1.5+40 3.5+120
50.000 V 0.001 V 1.5+60 0.4+25 0.4+25 1.5+40 3.5+120
500.00 V 0.01 V 1.5+60 0.4+25 0.4+25 1.5+40
3.5+120
[3]
1000.0 V 0.1 V 1.5+60 0.4+40 0.4+40
1.5+40
[3]
N/A
Function Range Resolution
Frequency
[7]
20 Hz – 45 Hz 45 Hz – 1 kHz 1 kHz – 20 kHz
20 kHz –
100 kHz
[1]
Tru e RM S AC
Current
[7]
500.00 μA
[4]
0.01 μA 1.0+20 0.7+20 0.75+20 5+80
5000.0 μA0.1 μA 1.0+20 0.7+20 0.75+20 5+80
50.000 mA 0.001 mA 1.0+20 0.7+20 0.75+20 5+80
440.00 mA 0.01 mA 1.0+20 0.7+20 1.5+20 5+80
5.0000 A 0.0001 A
1.5+20
[6]
0.7+20 3+60
<3 A/5 kHz
N/A
10.000 A
[5]
0.001 A
1.5+20
[6]
0.7+20