Tenma 72-3530 - Non-Contact AC Voltage Sensing; NCV Sensing Caution; Square-Wave Output

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NON-CONTACT AC VOLTAGE SENSING
• When checking whether the AC voltage
or the electromagnetic eld exists in
sensing space, approach the front end
of the instrument to the metered object
for sensing detection.
• If the analogue capacity of sensing
AC voltage is lower than or equal to
critical voltage V1, the main display will
show “EF”. If it is higher than the critical
voltage V1, the main display will display
the transverse section of “-”.
• Five sections of “- -” are set based on
the section voltage Vd, with a buzzing
sound stimulated in different tempos
so as to distinguish the magnitude of
sensing voltage. The red light will ash
on top of the instrument.
Caution
• When the range switch is set at the gear of “NCV”, no probe will be required for
sensing.
• If the electric eld voltage is greater than AC 100V, the instrument will let out
acousto-optic prompts (distance ≤10mm).
• If it is greater than 50mm, there will be no sound.
SQUARE-WAVE OUTPUT
• Long press SELECT to enter or exit
the square-wave output interface.
• Square-wave frequency output can
be selected with buttons RANGE and
MAXMIN.
• Square-wave duty ratio % can be
selected with (REL) (Hz%).
• Square-wave output amplitude is
about 0.8Vp.
• Square-wave output cycle/duty ratio is
1%-100%.
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