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Measuring current and voltage
Figure 3.6 A diagram showing a meter connected in circuit, with the red lead at
the point of higher potential
Take note — Take note — Take note — Take note
If you are using an analogue multi-meter, make sure
you have your leads the correct way round. When the
current through the multi-meter flows in the right
direction the movement and pointer turn clockwise.
In the wrong direction on the other hand, the movement
and pointer attempts to turn anti-clockwise.
At best you won’t get a valid measurement of current
if the multi-meter is the wrong way round — at worst
you’ll damage the movement.
A digital multi-meter, however, will merely give a
negative reading.
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