Ac Specifications; Table 8-2 Dc Current Specifications; Table 8-3 Ac Mv/Voltage Specifications - Agilent Technologies U1401A User's Manual And Service Manual

8 Specifications

Table 8-2 DC current specifications

Function Range
DC current 50 mA
500 mA
[1]
Always use the relative function to offset the thermal effect before measuring the signal. If this function is not used, the
accuracy will be 0.03% + 25. The thermal effect could be present in the following conditions:
• Constant current, constant voltage, or square wave output.
• Wrong operation — where the resistance, diode, or mV measurement function is used to measure high voltage signals
exceeding 250 V.
• After battery charging has completed.
• After measuring a current greater than 50 mA.

AC specifications

Table 8-3 AC mV/voltage specifications

Function
[1]
AC mV/voltage
(True-rms: From 5%
to 100% of range)
[1]
Input impedance: 1.1 MΩ in parallel with <100 pF (nominal) for the range of 5 V and above, and 1 GΩ (nominal) for the
50/500 mV range. Crest factor: ≤ 3.
148
Resolution
[1] 1 μA
[1] 10 μA
Range Resolution
1 μV
50 mV
10 μV
500 mV
5 V 0.1 mV
50 V 1 mV
250 V 10 mV
Accuracy Burden voltage/shunt
0.06 V (1 Ω)
0.03% + 5
0.6 V (1 Ω)
Accuracy
45 Hz to 5 kHz 5 kHz to 20 kHz
0.7% + 40 1.5% + 40
0.7% + 20 1.5% + 20
Overload protection
250 V, 630 mA
Quick acting fuse
Overload protection
250 Vrms
U1401A User's and Service Guide