Keysight u2722a - Making Measurements

2 Operation and Features
48 Keysight U2722A/U2723A User’s Guide
Making measurements
The U2722A/U2723A has an excellent output voltage and current measurement
capability. All the measurements are performed by digitizing the instantaneous
output voltage or current for a defined number of samples and sample interval,
storing the results in a buffer, and then calculating the measured result. The
programmable parameters include the number of samples and time interval
between each sample.
Voltage and current measurements
To measure the voltage or current for any output, use the following commands.
MEAS:VOLT? (@<ch>)
MEAS:CURR? (@<ch>)
The result of MEAS:CURR? or MEAS:VOLT? is dependent on
– NPLC setting for voltage or current
(SENSe:VOLTage[:DC]:NPLCycles <integer>, (@1|2|3) or
SENSe:CURRent[:DC]:NPLCycles <integer>, (@1|2|3)) where integer is
from 0 to 255
– line frequency selection (SYSTem:LFREQuency <F50HZ|F60HZ>, (@1|2|3))
prior to making the measurement
– latency time from many executable levels in the PC.
The maximum total time taken for measurements to complete if NPLC = 255 and
Line Frequency = 50 Hz is calculated according to the following formula.
NOTE
There is a trade-off between the programmable parameters and the speed,
accuracy, and stability of the measurements in the presence of noise.
Aperture time
=
NPLC
Line frequency
=
255
50
=
5.1 s