U1231A/U1232A/U1233A Handheld Multimeter
Understanding the Input Terminals
6 U1231A/U1232A/U1233A Quick Start Guide
Non-contact voltage detector (Vsense)
Voltage could still be present even if there is no alert
indication. Do not rely on the Vsense detector with
shielded wire. Never touch live voltage or conductor
without the necessary insulation protection.
The Vsense detector may be affected by differences in
socket design, insulation thickness, and insulation type.
2
AC
Voltage source
S
h
i
f
t
E
s
c
1
> 1 s
3
Press to change the Vsense detector’s sensitivity from
Hi.SE (high sensitivity) to Lo.SE (low sensitivity).