U1270 Datasheet, PDF (9/19 Pages) Agilent(Hewlett-Packard) – Agilent U1270 Series Handheld Digital Multimeters

3. 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 mea-sured time before proceeding with low
current measurements.
4. Notes for diode specifications:
• Overload protection: 1000 Vrms for short circuits with <0.3 A current.
• Built-in buzzer beeps continuously when the voltage measured is less than 50 mV and beeps once for forward-biased di-ode or semiconductor
junctions measured between 0.3 V and 0.8 V (0.3 V ≤ reading ≤ 0.8 V).
• Open voltage for diode: <+3.3 V DC
• Open voltage for Auto diode: <+2.5 V DC and > -1.0 V DC
AC specifications for U1271A
Function
True RMS AC
Voltage ^[1]
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
0.7 + 20
Accuracy
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
-
-
1.0 + 25 @ <200 Hz
5.0 + 25 @ <440 Hz
-
-
Function
True RMS AC
Current ^[2]
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
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.
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