Keysight U1281A/U1282A Quick Start Guide 7
Keysight U1281A/U1282A Quick Start Guide 7
Using the Keypad
Legend
Key response when pressed for:
Less than 1 second More than 1 second
– Starts the Max/Min/Avg 
recording
– Switches between the 
Max/Min/Avg recording 
modes
– Stops the Max/Min/Avg 
recording
– Starts and stops the 
Peak recording
Sets the Null/Relative mode
Enables and disables the 
non-contact voltage 
detection – Vsense
[a]
Sets a manual range Enables autoranging
Enables the frequency test 
mode for current or voltage 
measurements
Starts and stops data 
logging
Turns the backlight on/off
Activates and deactivates 
the dual display mode (if 
supported by the 
measurement)
Switches between the 
regular and shifted (icons 
printed in orange) functions 
Enters the Log Review 
menu
– Freezes the present 
reading in the display 
(TrigHold mode)
– Automatically freezes the 
present reading when 
certain conditions are met 
(AutoHold mode; when 
enabled from the 
multimeter’s Setup mode)
– Exits the AutoHold mode
– Stores a record of the 
measured signal and 
exports it via the 
multimeter’s optical 
communication port
Exits the TrigHold mode
[a] For the U1282A only