to measure current
The multimeter and ammeter
intensity is measured with an ammeter whose symbol is:
multimeter is a device that can make several kinds of measures
including current measurements. We must then use the ammeter mode.
How to connect a multimeter in ammeter mode?
We use the COM terminal and a terminal current (mA or A)
- The sense of connection: The electric current must always
go through the terminal intensity and exit through the COM terminal. It
is equivalent to say that the COM terminal is closest to the negative
terminal and the terminal current closest to the positive terminal of
the electric generator.
- The insertion in the circuit: the multimeter is connected in series
(The multimeter is inserted between two electric components).
How to choose the range of the multimeter in ammeter mode?
Definition: the chosen range on the ammeter corresponds to the greatest
current that it can measure.
range should not be smaller than the current because: the measure
couldn't be done and the ammeter may be damaged.
The range should not be too high otherwise the measurement may lack of
must first use the highest range for an approximation of current and
then choose the closest (but higher) to obtain a more accurate