U1250 Datasheet, PDF (4/15 Pages) Agilent(Hewlett-Packard) – Agilent U1250 Series Handheld Digital Multimeters

4 | Keysight | U1250 Series Handheld Digital Multimeter - Data Sheet
DC Specifications
Function
Voltage ¹
Resistance ³
Current
Diode test ⁸
Range
50.000 mV
500.00 mV
1000.0 mV
5.0000 V
50.000 V
500.00 V
1000.0 V
500.00 Ω ⁵
5.0000 kΩ ⁵
50.000 kΩ
500.00 kΩ
5.0000 MΩ
50.000 MΩ ⁶
500.00 MΩ ⁶
500.00 nS ⁷
500.00 µA
5000.0 µA
50.000 mA
440.00 mA
5.0000 A
10.000 A ⁹
–
Resolution
0.001 mV
0.01 mV
0.1 mV
0.0001 V
0.001 V
0.01 V
0.1 V
0.01 Ω
0.0001 kΩ
0.001 kΩ
0.01 kΩ
0.0001 MΩ
0.001 MΩ
0.01 MΩ
0.01 nS
0.01 µA
0.1 µA
0.001 mA
0.01 mA
0.0001 A
0.001 A
0.1 mV
Test current/
burden voltage
–
–
–
–
–
–
–
1.04 mA
416 µA
41.2 µA
4.12 µA
375 nA
187 nA
187 nA
187 nA
0.06 V (100 Ω)
0.6 V (100 Ω)
0.09 V (1 Ω)
0.9 V (1 Ω)
0.2 V (0.01 Ω)
0.4 V (0.01 Ω)
1.04 mA
Accuracy ± (% of reading + no. of least significant digit)
U1251B
U1252B/U1253B
0.05 + 50 ²
0.05 + 50 ²
0.03 + 5
0.025 + 5
0.08 +10
0.08 + 5
0.2 + 5
1 + 10
N/A
1 + 20
0.1 + 5 ⁸
0.2 + 5 ⁸
0.3 + 10
0.05 + 5
0.03 + 5
0.05 + 10
0.05 + 5
0.15 +5
1+5
3+10 < 200 MΩ / 8+10 > 200 MΩ
1 + 10
0.05 + 5 ⁸
0.15 + 5 ⁸
0.3 + 10
0.3 + 5
1.  Input impedance: Refer to Table A on page 10.
2.  The accuracy could be improve to 0.05%+10 for U1251B or 0.05%+5 for U1252B and U1253B by using
the Null function to zero out the thermal effect before measuring the signal.
3.  These specifications are defined for 2-wire ohms using Math Null. Without Math Null, add 0.2 ohm
additional error.
4.  Maximum open voltage: < +4.2 V
5.  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.
6.  For the range of 50 MΩ and 500 MΩ, the R.H. is specified for <60%.
7.  The accuracy is specified for <50 nS and after NULL function with open test lead.
8.  Always use the NULL function to zero out thermal effect with open test lead before measuring the
signal. If the NULL function is not used, an additional 20 counts needs to be added to the DC current
accuracy. Thermal effect could occur due to the following:
– Wrong operation to measure the high voltage of 50 V ~ 1000 V for resistance, diode, and mV
measurements.
– After battery-charging has completed.
– After measuring a current greater than 440 mA, it is suggested that the meter be left to cool down
for twice the measuring time used.
9.  Current can be measured 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~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.