11
Auto Range Digital Multimeter - USB Interface
Resistance measurement
To avoid electrical shock and/or damage to the instrument,
disconnect circuit power and discharge all high-voltage capacitors
before measuring resistance.
The meters resistance ranges are 600.0
Ω
, 6.000k
Ω
, 60.00k
Ω
, 600.0k
Ω
,
6.000M
Ω
and 60.00M
Ω
.
To measure resistance:
1. Set the dial to
Ω
Ω
range.
2. Connect the black test lead to the C
CO
OM
M and the red test lead to the H
Hz
z
Ω
Ω
V
V °
°C
C terminals respectively.
3. Connect the test leads to the circuit being measured and read the displayed value.
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• The measured value of a resistor in a circuit is often different from the
resistors rated value. This is because the meters test current flows through all
possible paths between probe tips.
• In order to ensure the best accuracy in measurement of low resistance,
short the test leads before measurement keeping the test probe resistance in
mind. This is necessary to subtract the resistance of the test leads from the
measured resistance.
• The resistance function can produce enough voltage to forward-bias silicon
diode or transistor junctions, causing them to conduct. To avoid this, DO NOT
use the 60M
Ω
range for in-circuit resistance measurements.
• On 60M
Ω
range, the meter may take a few seconds to stabilise reading. This
is normal for high resistance measuring.
• When the input is not connected, i.e. at open circuit, the figure 'OL' will be
displayed for the overrange condition.
5163440K_Instructions.qxd 18/09/2009 10:31 Page 11
