20 Agilent U1251A/U1252A User’s and Service Guide
1 Getting Started Tutorial
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 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.
1. See Table 3 , “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 swtich 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.
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