Specifications 7
Agilent U1251B/U1252B User’s and Service Guide 161
AC+DC Specifications for U1252B
Tab l e 7-6 U1252B true RMS ac+dc voltage specifications
Function Range Resolution
Frequency
30 Hz –
45 Hz
45 Hz –
1 kHz
1 kHz –
5 kHz
5 kHz –
15 kHz
15 kHz –
100kHz
[1]
Voltage
[2]
50.000 mV 0.001 mV 1.5 + 80 0.4 + 60 0.7 + 60 0.8 + 60 3.5 + 220
500.00 mV 0.01 mV 1.5 + 65 0.4 + 30 0.4 + 30 0.8 + 45 3.5 + 125
1000.0 mV 0.1 mV 1.5 + 65 0.4 + 30 0.4 + 30 0.8 + 45 3.5 + 125
5.0000 V 0.0001 V 1.5 + 65 0.4 + 30 0.6 + 30 1.5 + 45 3.5 + 125
50.000 V 0.001 V 1.5 + 65 0.4 + 30 0.4 + 30 1.5 + 45 3.5 + 125
500.00 V 0.01 V 1.5 + 65 0.4 + 30 0.4 + 30 - -
1000.0 V 0.1 V 1.5 + 65 0.4 + 45 0.4 + 45 - -
Notes for U1252B AC + DC voltage specifications:
1 The additional error to be added as frequency > 15 kHz and signal input < 10 %of range: 3 counts of LSD per kHz.
2 Input impedance: Refer to Table 7-19.
Tab l e 7-7 U1252B true RMS ac+dc current specifications
Function Range Resolution
Frequency
30 Hz – 45 Hz 45 Hz – 1 kHz 1 kHz – 20 kHz
Current
500.00 µA
[1]
0.01 µA 1.1 + 25 0.8 + 25 0.8 + 25
5000.0 µA 0.1 µA 1.1 + 25 0.8 + 25 0.8 + 25
50.000 mA 0.001 mA 1.2 + 25 0.9 + 25 0.9 + 25
440.00 mA 0.01 mA 1.2 + 25 0.9 + 25 0.9 + 25
5.0000 A 0.0001 A
1.8 + 30
[3]
0.9 + 30
3.3 +70
< 3 A/5 kHz
10.000 A
[2]
0.001 A
1.8 + 30
[3]
0.9 + 25
Notes for U1252B AC + DCcurrent specifications:
1 Input current > 35 µArms.
2 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.
3 Input current < 3 Arms.
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