Measuring Resistance; Current Measurement - 3B SCIENTIFIC PHYSICS U17451 Manual De Instrucciones

• Connect the multimeter and take
a reading from the V, A DC scale.
3.3.3 AC voltage up to 600 V
~
COM AΩ V
• Using the rotary switch (1) select
the corresponding measurement
range "600,...,10 V AC".
• Connect the multimeter and take
a reading from the V, A AC scale.

3.4 Current measurement

• When taking any current measure-
ments connect the multimeter in
series to the load in the circuit,
which has the least potential with
respect to ground.
• Measurements conducted in the 3
A range may not take longer than
1 min.
3.4.1 Direct current up to 1 A
_ +
COM AΩ V
• Using the rotary switch (1) select
the corresponding measurement
range "1 A,...,50 µA DC".
• Connect the multimeter and take
a reading on the V, A, DC scale.
3.4.2 Alternating current up to 3 A
~
COM AΩ V
• Using the rotary switch (1) select
the corresponding measurement
range "3 A,...,3 mA AC".
• Connect the multimeter and take
a reading on the V, A, AC scale.

3.5 Measuring resistance

_
+
COM AΩ
• Using the rotary switch (1) select
the corresponding measurement
range "x 100 Ω,..., x 1 Ω".
• Connect the multimeter and take
a reading on the Ù scale.
• When performing measurement
on semiconductors use the follow-
ing terminals: positive pole con-
nected to "COM" and negative pole
A, Ω".
50µA
connected "
100mV
• Resistance measurement is carried
out using the DC voltage from the
battery being used. Since the bat-
tery is under extreme loading dur-
ing measurements in the "x 1 Ω"
range, the measurement should
only be of a brief duration.
• Only measure zero-voltage ele-
ments due to the fact that exter-
nal voltages falsify measured val-
ues.
• When resistances measurements
are carried out involving longer
periods and switchover to other
measurement ranges is complete
check for 0 Ω full scale deflection
and adjust, if necessary.
9
V