Getting Started Tutorial 1
Agilent U1251A/U1252A User’s and Service Guide 19
The Keypad at a Glance
The operation of each key is shown below. Pressing a key
illuminates a related symbol on the display and sounds the
beeper. Turning the rotary switch to another position resets
the current operation of the key.
Figure 1 shows the keypad of the U1252A. The ms% (Pulse
width/Duty cycle), Hz , and frequency counter
functions are only available on the U1252A.
Table 1 Keypad Desciption/Functions
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.
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