Introduction 1
Keysight U1731C/U1732C/U1733C User’s Guide 33
Sets the tolerance mode.
– Connect/insert an appropriate component into 
the input terminals/sockets and press   to 
set the value shown on the secondary display 
as the standard reference value.
– Press   again to cycle through the various 
tolerance values (1% to 20%).
Turns the LCD backlight on for 15 seconds 
(default) or off. 
– To change the backlight time-out refer to 
“Changing the auto power-off and backlight 
time-outs” on page 87.
page 54 
and 
page 22
Sets the null/relative mode.
– The displayed value is saved as a reference to 
be subtracted from subsequent 
measurements.
– Press   again to cancel the null mode.
Enters the open/short calibration mode for the 
selected range and test frequency.
– Follow the prompts on the screen (open or 
short connector) and press   to begin the 
calibration process.
– The LCR meter will return to normal display 
when the calibration is complete.
page 61 
and 
page 62
Table 1-5 Keypad functions (continued)
Legend
Function when pressed for:
Learn more 
on:
Less than 1 second More than 1 second