Ducati Monster 696 2009 Manual page 695

section
P 9
9 - Diagnostic instruments
For information on the "DDS" tester, refer to Sect. D 5, DDS tester.
Using a multimeter to check the electrical systems
Introduction
This instrument allows you to measure resistances, voltages, and current values. Multimeters can be divided into two basic
types: those with an analogue display and those with a digital display Units of the first type are equipped with a dial and needle.
The dial is marked with the scales to be used for measurement of the various parameters. Digital units are equipped with a dial
that displays numbers corresponding to the values of the measured parameters. The type of measurement to be carried out
(voltage, current or resistance) is set by means of a selector or by means of several different sockets in which to insert the
two test probe connector terminals. In certain cases it is essential to set the full scale value before proceeding. For example,
in order to measure a 12 V signal, you need to set a full scale that is close to this value (e.g. 15 V or 20 V). It would be illogical
to set a full scale value of 10 V; the same applies when setting current (Amps) or resistance (Ohms) full scale values.
Sometimes the instrument can set the required full scale value automatically. Never exceed the maximum value allowed by
the tester when measuring voltage or current signals.
Notes
The DDS tester (Sect. D 5, DDS tester) can perform the functions of a digital multimeter.
Voltage measurement
Voltage measurements must be carried out by connecting the terminals of the tester in parallel to the load (e.g. to the wires
feeding a light bulb or a relay, the two battery terminals, or the two wires supplying power to a control unit). Voltages can be
constant over time (DC voltage) or variable over time (AC voltage). In the first case, it is important to consider the negative and
positive polarity of the application. It is therefore necessary to select on the multimeter the type of voltage you intend to measure.
(DC voltage is shown by the symbol = while AC voltage is denoted by ~).
Current measurement
Current measurements must be made by connecting the multimeter terminals in series with the load (e.g. disconnect one of the
wires feeding power to a light bulb and connect one terminal of the multimeter to the free end of wire and the other terminal
to the light bulb. When the lights switch is set to ON, the bulb will illuminate normally and the tester will show the absorbed
current, i.e. the amount of current passing through the wire. Warning: connections in series must be made and removed
only when the power is switched off. Never attempt to make or break a series connection when a device is powered.
Always make sure that the connection in series of the tester terminals on the electrical device is made is a safe manner in
such a way that it cannot be broken accidentally.
Monster 696/696+ - M.Y. 2009 - edition 00
Electrical system
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D
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