Keysight U1401B, User'S And Service Manual

Page: 27 / 159

Getting Started 1
Keysight U1401B User’s and Service Guide 27
Figure 1-5 Keypad shifted functions
8
9
11
7
10
Table 1-4 Keypad functions
No. Key Function when pressed for less than one second Function when pressed for more than one second
1 Selects DC, AC, or AC+DC Toggles between peak hold ON or OFF for V and
mA measurement
2 HOLD If the data hold mode is enabled:
Freezes the present measured value. Press again to
trigger the next measured value.
Exits data hold mode
[a]
If the refresh hold mode is enabled:
Enters or exits the refresh hold mode
–
MAX MIN
[b]
Cycles through MAX, MIN, AVG, and present (MAX
AVG MIN) readings in dynamic recording mode
Enters or exits the dynamic recording mode
[a]
3
Δ
NULL Saves the displayed value as a reference to be
subtracted from subsequent measurements
Toggles between mV and temperature tests
4 RANGE Changes measurement range Sets to autorange
5 DUAL Cycles through different combinations of primary
and secondary displays
–
6 Hz Selects frequency (Hz), duty cycle (%), or pulse
width (ms) on the primary display
Exits selection
7 SHIFT Enables and disables the shifted functions of the
other keys
Toggles backlight ON/OFF