User's Manual

Specifications 8
Agilent U1251A/U1252A User’s and Service Guide 153
AC Specifications
AC specifications for U1251A
Table 7-2 U1251A accuracy specifications ± (% of reading + number of LSD) for true RMS AC voltage
Function Range Resolution
Frequency
30 Hz to 45 Hz 45 Hz to 1 kHz 1 kHz to 10 kHz 10 kHz to 30 kHz
Voltage
[1]
50.000 mV 0.001 mV 1 + 60 0.6 + 40 1.0 + 40 1.6 + 60
500.00 mV 0.01 mV 1 + 60 0.6 + 25 1.0 + 40 1.6 + 60
1000.0 mV 0.1 mV 1 + 60 0.6 + 25 1.0 + 25 1.6 + 40
5.0000 V 0.0001 V 1 + 60 0.6 + 25 1.0 + 25 1.6 + 40
50.000 V 0.001 V 1 + 60 0.6 + 25 1.0 + 25 1.6 + 40
500.00 V 0.01 V 1 + 60 0.6 + 25 1.0 + 25 1.6 + 40
[2]
1000.0 V 0.1 V 1 + 60 0.6 + 40 1.0 + 40 -
Notes for U1251A AC voltage specifications:
1 Input impedance: > 1GHz for 50 mV to 1000 mV. Input impedance is 1.1 MΩ (nominal) with <100 pF for 5 V to 1000 V
ranges.
2 The input signal is lower than the product of 20,000,000 V-Hz (product of voltage and frequency).
Table 7-3 U1251A accuracy specifications ± (% of reading + number of LSD) for true RMS AC current
Function Range Resolution
Frequency
30 Hz to 45 Hz 45 Hz to 2 kHz 2 kHz to 20 kHz
Current
500.00 µA
[1]
0.01 µA 1.5 + 50 0.8 + 20 3 + 80
5000.0 µA 0.1 µA 1.5 + 40 0.8 + 20 3 + 60
50.000 mA 0.001 mA 1.5 + 40 0.8 + 20 3 + 60
440.00 mA 0.01 mA 1.5 + 40 0.8 + 20 3 + 60
5.0000 A 0.0001 A 2 + 40
[3]
0.8 + 20 3 + 60
< 3 A/5 kHz
10.000 A
[2]
0.001 A 2 + 40
[3]
0.8 + 20
Notes for U1251A AC current 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.