U1272A Datasheet, PDF (12/22 Pages) Keysight Technologies – U1270 Series Handheld Digital Multimeters

12 | Keysight | U1270 Series Handheld Digital Multimeters - Data Sheet
Electrical Specifications
AC specifications for U1271A
Function
True RMS AC
Voltage¹
Range
Resolution
300 mV
0.01 mV
3V
0.0001 V
30 V
0.001 V
300 V
0.01 V
1000 V
0.1 V
LPF (low pass filter) enabled,
applicable for all voltage
ranges and resolution
45 Hz to
65 Hz
0.7 + 20
0.7 + 20
0.7 + 20
0.7 + 20
0.7 + 20
Accuracy ± (% of reading + counts of least significant digit)
30 Hz to
1 kHz
1 kHz to
5 kHz
1.0 + 25
2.0 + 25
1.0 + 25
2.0 + 25
1.0 + 25
2.0 + 25
1.0 + 25
2.0 + 25
1.0 + 25
—
5 kHz to
20 kHz
2.0 + 40
2.0 + 40
2.0 + 40
—
—
0.7 + 20
1.0 + 25 @ < 200 Hz
5.0 + 25 @ < 440 Hz
—
—
Function
True RMS AC
Current²
Range
300 µA
3000 µA
30 mA
300 mA
3A
10 A
Resolution
0.01 µA
0.1 µA
0.001 mA
0.01 mA
0.0001 A
0.001 A
Accuracy ± (% of reading + counts of least
significant digit)
45 Hz to 2 kHz
0.9 + 25
0.9 + 25
0.9 + 25
0.9 + 25
1.0 + 25
1.0 + 25
Burden voltage/Shunt
< 0.04 V/100 Ω
< 0.4 V/100 Ω
< 0.08 V/1 Ω
< 1.00 V/1 Ω
< 0.1 V/0.01 Ω
< 0.3 V/0.01 Ω
1.  Notes for voltage specifications:
- Overload protection: 1000 Vrms. For millivolt measurements, 1000 Vrms for short circuits with < 0.3 A current.
- Input impedance: 10 MΩ (nominal) in parallel with < 100 pF.
2.  Notes for current specifications:
- Overload protection for 300 μA to 300 mA range: 0.44 A/1000 V; 10 × 35 mm 30 kA fast-acting fuse.
- Overload protection for 3 A to 10 A range: 11 A/1000 V; 10 × 38 mm 30 kA fast-acting fuse.
- Specification for 300 mA range: 440 mA continuous.
- Specification for 10 A range: 10 A continuous. Add 0.3% to the specified accuracy when measuring signals > 10 to 20 A for 30 seconds maximum. After
measuring currents > 10 A, cool down the multimeter for twice the duration of the measured time before proceeding with low current measurements.