Series 2280 Precision DC Power Supply Reference Manual Section 2: General operation
077085503 / March 2019 2-17
Measure menu
The menus organized under Measure in the main menu allow you to select, configure, and perform
measure operations from the Series 2280 front panel. The following topics describe the settings that
are available on these interactive screens.
Measure Settings menu
This menu contains settings for the presently selected measurement function, which is identified by
the Type indicator in the upper right corner of the menu. The line frequency is also shown here.
Select which type of measurement is active:
 V + I: Concurrent measurement function. The instrument measures
voltage and current at the same time.
 V: Voltage measurement function. The instrument only measures
voltage.
 I: Current measurement function. The instrument only measures
current.
Set the measurement range for the selected measurement function or select
Auto to have the instrument select the range automatically.
Select the display digits: 6½, 5½, or 4½ digits.
Set Auto Zero to On so that the instrument periodically gets new
measurements of its internal ground and voltage reference. This setting
increases measurement accuracy, but may slow measurement time.
Set the amount of time that the input signal is measured. A lower number of
power line cycles (NPLCs) results in faster reading rates, but increased
noise. A higher number of NPLCs results in lower reading noise, but slower
reading rates.
Read only; shows the present power line frequency setting.
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