U2781A Datasheet, PDF (62/76 Pages) Keysight Technologies – USB Modular Products

Frequency specifications¹
Frequency accuracy
Function
Range
Frequency
20 Hz to 300 kHz
Frequency Sensitivity for AC Voltage
Function
Range
AC voltage
100 mV²
1V
10 V
100 V
250 V
Temperature specifications
Temperature accuracy
Function
Temperature
Thermistor type
5 kΩ thermistor
Accuracy
(% of reading + % of
range)
0.0200 + 0.003
Minimum input fre-
quency
Temperature
coefficient (% of range)
1 Hz
0.005
Minimum sensitivity (RMS sine wave)
Frequency (Hz)
20 ~ 100k
100k ~ 300k
20 mV
20 mV
100 mV
120 mV
1V
1.2 V
10 V
20 V
100 V
120 V
Range
–80.0 °C to 150 °C
–112 °F to 302 °F
Accuracy
Temperature coefficient
Probe accuracy + 0.2 °C
0.002 °C
NOTE
To ensure better measurement results and to guard against the change of environment or setup, always
enable the Null offset.
Typical Reading Speed (in seconds) Characteristics
Test/Range
ACV
100 mV(20 Hz)
0.979
1V(20 Hz)
0.979
10V(20Hz)
0.978
100V(45 Hz)
0.979
300V(45 Hz)
0.979
Test/Range
ACI
10 mA
0.979
100 mA
0.979
1A
0.979
2A
0.979
Freq
1.190
1 _{Frequency measurement can only be done in auto range mode. Specifications are for 30 minutes warm-up time, using one second aperture. Measuring}
method is using reciprocal counting technique with AC coupled input at AC voltage function. Gate time of 0.1 second or 1 second.
2 _{Only applicable for square wave measurement.}
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