Agilent Technologies U1251A, Руководство пользователя и сервисное руководство

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160 Agilent U1251A/U1252A User’s and Service Guide
8 Specifications
U1251A AC Specifications
Table 6 U1251A AC Accuracy ± (% of r No. of Least Significant
Digit)
[1] Input impedance: > 1GHz for 50 mV to 1000 mV. Input impedance is 1.1 M
Ω
(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).
[3] Input current >35
μ
Arms.
[4] Current can be measured from 2.5 A up to 10 A continuously. An additional 0.5%
needs to be added to the specified accuracy if the signal measured is in the
range of 10 A to 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.
[5] Input current < 3 Arms.
Function Range Resolution
Frequency
30 Hz to 45 Hz 45 Hz to 1 kHz 1 kHz to 10 kHz 10 kHz to 30 kHz
True RMS
AC 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 N/A
Function Range Resolution
Frequency
30 Hz to 45 Hz 45 Hz to 2 kHz 2 kHz to 20 kHz
AC Current
500.00
μ
A
(3) 0.01
μ
A 1.5+50 0.8+20 3+80
5000.0
μ
A 0.1
μ
A 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
(5) 0.8+20 3+60
<3 A/5 kHz
10.000 A
(4) 0.001 A
2+40
(5) 0.8+20