Agilent Technologies U1251A manual AC Specifications, Frequency Function Range Resolution

Specifications 8

AC Specifications

AC specifications for U1251A

Table 7-2U1251A accuracy specifications ± (% of reading + number of LSD) for true RMS AC voltage

				Frequency
Function	Range	Resolution	30 Hz to 45 Hz	45 Hz to 1 kHz	1 kHz to 10 kHz	10 kHz to 30 kHz
	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
Voltage [1]
	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:

1Input 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.

2The input signal is lower than the product of 20,000,000 V-Hz (product of voltage and frequency).

Table 7-3U1251A accuracy specifications ± (% of reading + number of LSD) for true RMS AC current

				Frequency
Function	Range	Resolution	30 Hz to 45 Hz	45 Hz to 2 kHz	2 kHz to 20 kHz
	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
Current	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
	10.000 A [2]	0.001 A	2 + 40 [3]	0.8 + 20	< 3 A/5 kHz

Notes for U1251A AC current specifications:

1Input current > 35 µArms.

2Current 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.

3Input current < 3 Arms.

Agilent U1251A/U1252A User’s and Service Guide 153