Information

13 | Keysight | U1280 Series Handheld Digital Multimeters – Data Sheet
Frequency specification for U1281A / U1282A
Range Resolution Accuracy ± (% of reading +
counts of least significant digit)
Minimum input frequency
99.999 Hz 0.001 Hz 0.02 % + 3
1
0.5 Hz
999.99 Hz 0.01 Hz 0.005 % + 3
9.9999 kHz 0.0001 kHz 0.005 % + 3
99.999 kHz 0.001 kHz 0.005 % + 3
999.99 kHz 0.01 kHz 0.005 % + 3
9.9999 MHz 0.0001 MHz 0.005 % + 3, < 1 MHz
Notes
1. The frequency measurement is susceptible to error when measuring low-voltage, low-frequency signals.
Shielding inputs from external noise pickup is critical for minimizing measurement errors. For U1282A only,
turning on LPF (low pass filter) may help to filter out the noise and achieve a stable reading.
U1281A / U1282A sensitivity
1
for voltage measurement
Input range Minimum sensitivity (RMS sine wave) Trigger level for DC coupling
Maximum input
2
for
specified accuracy
15 Hz to 100 kHz Typical bandwidth
at full scale
15 Hz to 100 kHz Typical bandwidth
at full scale
60 mV 2.5 mV 1 MHz 4.5 mV 1 MHz
600 mV 12 mV 1 MHz 15 mV 1 MHz
6 V 0.25 V 900 kHz 0.45 V 900 kHz
60 V 2.5 V 600 kHz 4.5 V 600 kHz
600 V 25 V 100 kHz 45 V 100 kHz
1000 V 33 V 100 kHz 50 V 100 kHz
U1281A / U1282A sensitivity
1
for current measurement
Input range Minimum sensitivity (RMS sine wave)
Maximum input
2
for specified accuracy 15 Hz to 30 kHz Typical bandwidth at full scale
60 µA 38 µA 100 kHz
6 mV 0.38 mA 100 kHz
60 mV 3.8 mA 100 kHz
600 mV 38 mA 100 kHz
6 A 0.38 A 100 kHz
10 A 1 A 100 kHz
Notes
1. The sensitivity is typical performance.
2. Refer to ‘AC Specifications’ for specified accuracy of maximum input.