Multimeter Features 3 
Detecting AC Voltage Presence (Vsense)
U1231A/U1232A/U1233A User’s Guide 67
Figure 3-1 Detecting voltage presence
Press and hold   for more than 1 second to disable the 
Vsense function.
• Place the top of the multimeter (with the Vsense indicator) close to a 
conductor when sensing for AC voltages (as low as 24 V in the Hi.SE 
setting).
• The low sensitivity setting can be used on flush mounted wall sockets 
or outlets and various power strips or cords. 
• The high sensitivity setting allows for AC voltage sensing on other 
styles of recessed power connectors or sockets where the actual AC 
voltage is recessed within the connector itself.
2
AC
Voltage source
S
h
i
f
t
E
s
c
1
> 1 s
3