2 Making Measurements
54 Keysight U1253B User’s and Service Guide
Measuring DC voltage
Set up your multimeter to measure DC voltage as shown in Figure 2-2. Probe the
test points and read the display.
– Press if necessary to ensure that is shown on the display.
– Press to display dual measurements. See Table 1-8 of “Selecting
display with the Dual button” on page 44 for a list of dual measurements
available.
– Press and hold for more than 1 second to exit dual display mode.
– For firmware version 2.25 and below, the Filter function is switched off by
default. You are strongly advised to update your products to the latest
firmware version to take advantage of the latest features and measurement
improvements.
– For measuring DC voltage from a mixed signal in the DC measurement mode,
ensure that the Filter is enabled (refer to “Setting the Filter” on page 144).
– To avoid possible electric shock or personal injury, enable the Low Pass Filter
to verify the presence of hazardous DC voltages. Displayed DC voltage
values can be influenced by high frequency AC components and must be
filtered to assure an accurate reading.