Specifications 7
Agilent U1251B/U1252B User’s and Service Guide 157
Function Range Resolution
Test Current/
Burden Voltage
Accuracy
U1251B U1252B
Resistance
[6]
500.00 Ω
[3]
0.01 Ω 1.04 mA 0.08 + 10 0.05 + 10
5.0000 kΩ
[3]
0.0001 kΩ 416 µA
0.08 + 5
0.05 + 5
50.000 kΩ 0.001 kΩ 41.2 µA
500.00 kΩ 0.01 kΩ 4.12 µA
5.0000 MΩ 0.0001 MΩ 375 nA 0.2 + 5 0.15 + 5
50.000 MΩ
[4]
0.001 MΩ 187 nA 1 + 10 1 + 5
500.00 MΩ
[ 4]
0.01 MΩ 187 nA -
3 + 10 < 200MΩ/
8 + 10 > 200MΩ
500.00 nS
[5]
0.01 nS 187 nA 1 + 20 1 + 10
Notes for resistance specifications:
3 The accuracy of 500 Ω and 5 kΩ is specified after Null function, which is used to subtract the test lead resistance and the
thermal effect.
4 For the range of 50 Ω/500 MΩ, the R.H. is specified for < 60 %.
5 The accuracy is specified for < 50 nS and after Null function with open test lead.
6 Maximum open voltage: < + 4.2 V.
Tab l e 7-1 DC Accuracy ± (% of reading + Number of Least Significant Digit) (continued)