ASV 3270, User Manual

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The ASV 3270 is a multi-tester for use during car audiovisual system
installation.
It has 5 different modes of operation.
1 - Voltage Detection . Quickly determine if a wire has 12V or 24V
on it. This function works much like a traditional test light, except
that it has a high impedance input to minimise the risk of damage to
the electronics in modern vehicles, and it can differentiate between
12V and 24V.
2 - Line Audio Listen . Using its miniature inbuilt speaker and
amplifier, this mode allows the installer to test a line level output
from a head unit or sound processor for a signal.
3 - Line level Tone Generator . In this mode, the ASV 3270 outputs
a test tone at line level that can be used to check amplifiers.
4 - Speaker Polarity (Phase) Test . By playing a special test tone on
the head unit and connecting the 3270 to speaker wires, the installer
can instantly determine which wire is positive and which negative.
5 - Speaker Test . The speaker test mode allows the installer to
quickly test if a speaker works. It also pulses the speaker with a
200mA current every couple of seconds, which displaces the cone,
allowing polarity to be determined. This mode also gives an
approximate indication if the speaker is a 2 Ohm or 4 to 8 Ohm
impedance, and can allow the installer to quickly determine if there
is a short circuit in speaker wiring.
CAUTION
The ASV 3270 is rated to a maximum voltage of
32VDC. Connecting to voltages higher than this
may risk damage to the unit and injury to the
operator.
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