AC specifications for U1272A

Function

Range

Resolution

Accuracy

45 to

65 Hz

20 Hz to 1

kHz

1 kHz to

5 kHz

5 kHz to

20 kHz

20 kHz

to 100

kHz

True RMS AC

30 mV

0.001 mV

0.6 + 20

0.7 + 25

1.0 + 25

1.0 + 40

3.5 + 40

300 mV

0.01 mV

0.6 + 20

0.7 + 25

1.0 + 25

1.0 + 40

3.5 + 40

3 V

0.0001 V

0.6 + 20

1.0 + 25

1.5 + 25

2.0 + 40

3.5 + 40

30 V

0.001 V

0.6 + 20

1.0 + 25

1.5 + 25

2.0 + 40

3.5 + 40

300 V

0.01 V

0.6 + 20

1.0 + 25

1.5 + 25

2.0 + 40

-

1000 V

0.1 V

0.6 + 20

1.0 + 25

1.5 + 25

-

-

LPF (low pass filter)

enabled, applicable for

all voltage ranges and

resolution

0.6 + 20

1.0 + 25 @

<200 Hz

5.0 + 25 @

<440 Hz

--

-

Z

LOW

1000 V

2.0 + 40

2 + 40 @

<440 Hz

--

-

Function

Range

Resolution

Accuracy

Burden

voltage/

Shunt

45 to

65 Hz

20 Hz

to

2 kHz

True RMS

AC Current

[2]

300 µA

0.01 µA

0.6 + 25

0.9 + 25

<0.04 V/ 100 Ω

3000 µA

0.1 µA

0.6 + 25

0.9 + 25

<0.4 V/ 100 Ω

30 mA

0.001 mA

0.6 + 25

0.9 + 25

<0.08 V/ 1 Ω

300 mA

0.01 mA

0.6 + 25

0.9 + 25

<1.00 V/ 1 Ω

3A

0.0001 A

0.8 + 25

1.0 + 25

<0.1 V/ 0.01 Ω

10 A

0.001 A

0.8 + 25

1.0 + 25

<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

•

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.

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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