U1272A Datasheet, PDF (13/22 Pages) Keysight Technologies – U1270 Series Handheld Digital Multimeters

13 | Keysight | U1270 Series Handheld Digital Multimeters - Data Sheet
Electrical Specifications
AC specifications for U1272A/U1273A and U1273AX
Function
True RMS AC
Voltage¹
Range
Resolution
30 mV
300 mV
3V
30 V
300 V
1000 V
0.001 mV
0.01 mV
0.0001 V
0.001 V
0.01 V
0.1 V
LPF (low pass filter) enabled,
applicable for all voltage
ranges and resolution
Z_LOW 1000 V
45 Hz to
65 Hz
0.6 + 20
0.6 + 20
0.6 + 20
0.6 + 20
0.6 + 20
0.6 + 20
0.6 + 20
2.0 + 40
Accuracy ± (% of reading + counts of least significant digit)
20 Hz to
1 kHz
1 kHz to
5 kHz
5 kHz to
20 kHz
0.7 + 25
1.0 + 25
1.0 + 40
0.7 + 25
1.0 + 25
1.0 + 40
1.0 + 25
1.5 + 25
2.0 + 40
1.0 + 25
1.5 + 25
2.0 + 40
1.0 + 25
1.5 + 25
2.0 + 40
1.0 + 25
1.5 + 25
—
1.0 + 25 @ <
200 Hz
5.0 + 25 @ <
—
—
440 Hz
2 + 40 @ < 440
Hz
—
—
20 kHz to
100 kHz
3.5 + 40
3.5 + 40
3.5 + 40
3.5 + 40
—
—
—
—
Function
True RMS AC
Current²
Range
Resolution
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
0.6 + 25
0.9 + 25
0.6 + 25
0.9 + 25
0.6 + 25
0.9 + 25
0.6 + 25
0.9 + 25
0.8 + 25
1.0 + 25
0.8 + 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.
- Z_LOW impedance: 2 kΩ (nominal).
- The input signal is lower than the product of 20,000,000 V×Hz.
- 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 voltage ranges, the accuracy is specified at 2.5% + 25 counts when measuring below –20 °C for 20 to 45 Hz AC 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 current ranges, the accuracy is specified at 2.5% + 25 counts when measuring below –20 °C for 20 to 45 Hz AC signals.