Getting Started 1
Keysight U1253B User’s and Service Guide 33
Table 1-2 Keypad descriptions and functions
Button Function when pressed for less than 1 second Function when pressed for more than 1 second
1
cycles through OLED display brightness
levels.
– enters Log Review mode. Press to switch
between manual or interval logging data.
– Press or to view first or last logged data respectively.
Press or to scroll through the logged data.
– Press for more than 1 second to exit this mode.
2
– holds the current measured value.
– In Data Hold mode ( ), press
again to trigger the holding of the next measured
value. Press for more than 1 second to exit
this mode.
– In Refresh Hold mode ( ), the reading is
updated automatically once the reading is stable
and the count setting is exceeded
[a]
. Press
again to exit this mode.
– enters the Dynamic Recording mode.
– Press again to scroll through maximum, minimum,
average, or present readings (indicated by ,
, , or on the display).
– Press for more than 1 second to exit this mode.
3
– saves the displayed value as a reference to
be subtracted from subsequent measurements.
– While in null mode, press to view the
relative value ( ) that has been saved.
The saved relative value will be displayed for 3
seconds.
– Press while the relative value ( ) is
being displayed to cancel the Null function.
– enters the 1 ms Peak Hold mode.
– Press to scroll through maximum ( ) and
minimum ( ) peak readings.
– Press for more than 1 second to exit this mode.
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