BT21i Current sensor User’s Guide
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Practical information
CAUTION:
•
NEVER
connect a Current sensor directly across a battery or power supply,
without a resistor to limit the current within the range of the sensor.
Failure to limit the current will cause permanent damage to the sensor.
•
NEVER
use high voltages or household AC.
•
The Current sensor should be
placed
in
series
with the circuit
component through which the
current is to be measured.
•
Make sure you observe the
correct polarity, i.e. connect
the black lead from the Current
sensor to the negative terminal
of the cells.
•
Currents in either direction can
be measured.
Suggested experiments
The Current sensor can be used in various experiments such as:
•
Battery life
•
Voltage / Current relationships
•
Ohm’s law – can be used together with a CMA Differential Voltage sensor
•
Electrical component characteristics e.g. a light bulb, a diode, a light dependent
resistor
•
Series and parallel circuits
•
Capacitor discharge, charge and energy stored.
Connecting the Current sensor in series with
a resistor to measure the current passing through it.
