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U1271A Datasheet, PDF (13/22 Pages) List of Unclassifed Manufacturers – U1270 Series Handheld Digital Multimeters | |||
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Electrical Specifications
AC specifications for U1272A/U1273A and U1273AX
Function
True RMS AC
Voltage1
Range
Resolution
30 mV
0.001 mV
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
ZLOW 1000 V
Accuracy ± (% of reading + counts of least significant digit)
45 Hz to
65 Hz
20 Hz to
1 kHz
1 kHz to
5 kHz
5 kHz to
20 kHz
20 kHz to
100 kHz
0.6 + 20
0.6 + 20
0.6 + 20
0.7 + 25
0.7 + 25
1.0 + 25
1.0 + 25
1.0 + 25
1.5 + 25
1.0 + 40
1.0 + 40
2.0 + 40
3.5 + 40
3.5 + 40
3.5 + 40
0.6 + 20
1.0 + 25
1.5 + 25
2.0 + 40
3.5 + 40
0.6 + 20
1.0 + 25
1.5 + 25
2.0 + 40
â
0.6 + 20
1.0 + 25
1.5 + 25
â
â
0.6 + 20
1.0 + 25 @ < 200 Hz
5.0 + 25 @ < 440 Hz
â
â
â
2.0 + 40 2 + 40 @ < 440 Hz
â
â
â
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
0.6 + 25
0.6 + 25
0.6 + 25
0.9 + 25
0.9 + 25
0.9 + 25
0.9 + 25
0.8 + 25
0.8 + 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:
ââ Overload protection: 1000 Vrms. For millivolt measurements, 1000 Vrms for short circuits with < 0.3 A current.
ââ Input impedance: 10 MΩ (nominal) in parallel with < 100 pF.
ââ ZLOW impedance: 2 kΩ (nominal).
ââ The input signal is lower than the product of 20,000,000 VÃHz.
ââ 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.
ââ U1273AX only: For all AC voltage ranges, the accuracy is specified at 2.5% + 25 counts when measuring below â20 °C for 20 to 45 Hz AC
signals.
2. Notes for current specifications:
ââ Overload protection for 300 μA to 300 mA range: 0.44 A/1000 V; 10 à 35 mm 30 kA fast-acting fuse.
ââ Overload protection for 3 A to 10 A range: 11 A/1000 V; 10 Ã 38 mm 30 kA fast-acting fuse.
ââ Specification for 300 mA range: 440 mA continuous.
ââ 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.
ââ 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 â20 °C. The Null function is used to subtract the test lead resistance and thermal effect (by shorting the test leads).
ââ U1273AX only: For all AC current ranges, the accuracy is specified at 2.5% + 25 counts when measuring below â20 °C for 20 to 45 Hz AC
signals.
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