U1272A Datasheet, PDF (14/22 Pages) Keysight Technologies – U1270 Series Handheld Digital Multimeters

14 | Keysight | U1270 Series Handheld Digital Multimeters - Data Sheet
Electrical Specifications
AC + DC specifications for U1272A/U1273A and U1273AX
Function
Range
True RMS
AC + DC Voltage¹
30 mV
300 mV
3V
30 V
300 V
1000 V
Resolution
0.001 mV
0.01 mV
0.0001 V
0.001 V
0.01 V
0.1 V
45 Hz to
65 Hz
0.7 + 40
0.7 + 25
0.7 + 25
0.7 + 25
0.7 + 25
0.7 + 25
Accuracy ± (% of reading + counts of least significant digit)
20 Hz to
1 kHz
1 kHz to
5 kHz
5 kHz to
20 kHz
0.8 + 45
1.1 + 45
1.1 + 60
0.8 + 30
1.1 + 30
1.1 + 45
1.1 + 30
1.6 + 30
2.1 + 45
1.1 + 30
1.6 + 30
2.1 + 45
1.1 + 30
1.6 + 30
2.1 + 45
1.1 + 30
1.6 + 30
—
20 kHz to
100 kHz
3.6 + 60
3.6 + 45
3.6 + 45
3.6 + 45
—
—
Function
Range
Resolution
True RMS
AC + DC Current²
300 µA
3000 µA
30 mA
300 mA
3A
10 A
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 65 Hz
20 Hz to 2 kHz
0.8 + 30
1.1 + 30
0.8 + 30
1.1 + 30
0.8 + 30
1.1 + 30
0.8 + 30
1.1 + 30
0.9 + 35
1.3 + 35
0.9 + 35
1.3 + 35
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.
- For 20 to 100 kHz accuracy: Three counts of the LSD per kHz of additional error is to be added for frequencies > 20 kHz and signal inputs < 10% of range
- U1273AX only: For all AC+DC voltage ranges, the accuracy is specified at 2.5% + 30 counts when measuring below –20 °C for 20 to 45 Hz AC+DC signals.
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.
- U1273AX only: The accuracy for the 300 μA range, 3000 μA range, and 30 mA is specified after the Null function is used when measuring at temperatures
below –20 °C. The Null function is used to subtract the test lead resistance and thermal effect (by shorting the test leads).
- U1273AX only: For all AC+DC current ranges, the accuracy is specified at 2.5% + 30 counts when measuring below –20 °C for 20 to 45 Hz AC+DC signals.