Getting Started Tutorial 1
Agilent U1251B/U1252B User’s and Service Guide 9
The keypad at a glance
The operation of each key is shown below. Pressing a key
illuminates a related symbol on the display and emits a
beep. Turning the rotary switch to another position resets
the current operation of the key.
Figure 1- 7 below shows the keypad of the U1252B. The ms%
(Pulse width/Duty cycle), Hz , and frequency
counter functions are only available on the U1252B.
Figure 1-7 U1252B keypad
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 acts as a toggle switch to turn backlit ON/OFF.
Backlit automatically turns off after 30s (default)
[1]
.
displays the battery capacity for 3 seconds.
2 freezes the measured value. In Data Hold
mode, press again to trigger hold of the next measured
value. In Refresh Hold mode, reading updates
automatically once reading is stable and count setting
is exceeded
[1]
.
enters Dynamic Recording mode.
Press again to scroll through Max, Min, Avg,
and present readings (indicated by MAXMINAVG on
display) .
3 saves displayed value as a reference to be
subtracted from subsequent measurements. Press
again to see the relative value that has been saved.
enters 1 ms Peak Hold mode. Press
to scroll through Max and Min peak readings.
4 scrolls through the measuring function(s) at a
particular rotary switch position.
enters Log Review mode. Press
to switch to manual or interval logging data. Press
or to view first or last logged data respectively.
Press or to scroll up or down logged data.
Press for more than 1 second to exit mode.
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