3Multimeter Features
Detecting AC Voltage Presence (Vsense)
66 U1231A/U1232A/U1233A User’s Guide
Detecting AC Voltage Presence (Vsense)
The Vsense detector is a non- contact voltage detector (for
U1233A model only) that detects the presence of AC voltages
nearby.
Press and hold for more than 1 second to enable the
Vsense function (on any position of the rotary switch except
OFF).
Press to toggle the Vsense detector’s sensitivity between
(high sensitivity) or (low sensitivity).
You are advised to test on a known live circuit within the rated AC
voltage range of this product before and after each use to ensure that
the Vsense detector works.
Voltage could still be present even if there is no Vsense alert
indication. Do not rely on Vsense detector with shielded wire. Never
touch live voltage or conductor without the necessary insulation
protection or power off the voltage source.
The Vsense detector may be affected by differences in socket design,
insulation thickness, and insulation type.
You are advised to measure voltage by using test leads through the
VZ
LOW
, AC V, or DC V function after using the Vsense function, even if
there is no alert indication.
If the presence of AC voltage is sensed, the multimeter’s beeper will sound
and the Vsense red LED at the top of the multimeter will turn on. The
audible and visual alert allows you to easily sense nearby AC voltage
presence.
No resolution and accuracy of voltage measurement will be displayed in
this mode.
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