User's Manual

10 Agilent U1251A/U1252A User’s and Service Guide
1 Getting Started Tutorial
Button Function when pressed for less than 1 second Function when pressed for more than 1 second
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.
5 scrolls through available measuring ranges
(except when rotary switch is set at TEMP or at Hz [for
U1252A] position)
[2]
.
sets to Auto Range mode.
6 scrolls through available dual-combination
displays (except when rotary switch is set at TEMP, Hz
or [for U1252A] position, or when meter is in
1 ms peak hold or dynamic recording mode)
[3]
.
exits Hold, Null, Dynamic Recording, 1 ms
Peak Hold and dual display modes.
7 enters Frequency Test mode for current or
voltage measurements. Press to scroll through
frequency (Hz), duty cycle (%) and pulse width (ms)
functions. In duty cycle (%) and pulse width (ms)
tests, press to switch to positive or negative
pulse.
enters logging mode. In manual data logging,
press to log data manually into memory. In
automatic data logging, data logs automatically
[1]
.
Press for more than 1 second to exit auto data
logging mode.
Notes for keypad descriptions and functions:
1 See Ta b l e 4 - 1 on page 75, “Available setting options in Setup mode,” for details of available options.
2 When rotary switch is at TEMP, press to switch to ºC or ºF display. When rotary switch is at Hz, press to
switch to division of signal frequency by 1 or 100.
3 When rotary switch is at TEMP, ETC is ON by default. You may press to disable ETC (Environment Temperature
Compensation), will appear on display. For pulse and duty cycle measurement, press to switch trigger slope
to positive or negative. When meter is in peak or dynamic-recording mode, press to restart 1 ms peak hold or
dynamic recording mode.