©
National Instruments Corporation
41
NI myDAQ User Guide and Specifications
Caution
Do
not
use this device for connection to signals or for measurements within
Measurement Categories II, III, or IV. For more information on Measurement Categories,
refer to the
section.
Connectivity ........................................... Banana jacks
Resolution .............................................. 3.5 digits
Input coupling ........................................ DC (DC Voltage, DC Current,
Resistance, Diode, Continuity);
AC (AC Voltage, AC Current)
Voltage Measurement
DC ranges............................................... 200 mV, 2 V, 20 V, 60 V
AC ranges............................................... 200 mV
rms
, 2 V
rms
, 20 V
rms
Note
All AC voltage accuracy specifications apply to signal amplitudes greater than 5%
of range.
Accuracy
Input impedance ..................................... 10 M
Function
Range
Resolution
Accuracy
± ([% of Reading] + Offset)
DC Volts
200.0 mV
0.1 mV
0.5% + 0.2 mV
2.000 V
0.001 V
0.5% + 2 mV
20.00 V
0.01 V
0.5% + 20 mV
60.0 V
0.1 V
0.5% + 200 mV
40 to 400 Hz
400 to 2,000 Hz
AC Volts
200.0 mV
0.1 mV
1.4% + 0.6 mV
*
—
2.000 V
0.001 V
1.4% + 0.005 V
5.4% + 0.005 V
20.00 V
0.01 V
1.5% + 0.05 V
5.5% + 0.05 V
*
The accuracy for AC Volts 200.0 mV range is in the frequency range of 40 Hz to 100 Hz.
For example, for a 10 V using the DC Volts function in the 20.00 V range, calculate the
accuracy using the following equation:
10 V × 0.5% + 20 mV = 0.07 V