Idiomas disponibles
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2
Making Measurements
Measuring Resistance
Set up your clamp meter to measure resistance as shown in
test points, and read the display.
To avoid possible damage to your clamp meter or to the equipment under
CAUTION
test, disconnect the circuit power and discharge all high-voltage capacitors
before measuring resistance.
Resistance (opposition to the current flow) is measured by sending a small
NOTE
current out through the test leads to the circuit under test. Because this current
flows through all possible paths between the leads, the resistance reading
represents the total resistance of all paths between the leads. Resistance is
measured in ohms (Ω).
Figure 2-8
Keep the following in mind when measuring resistance.
NOTE
– The test leads can add 0.1 Ω to 0.2 Ω of error to resistance measurements. To
– Because the clamp meter's test current flows through all possible paths
– The resistance function can produce enough voltage to forward-bias silicon
48
Resistance display
test the leads, touch the probe tips together and read the resistance of the
leads.
between the probe tips, the measured value of a resistor in a circuit is often
different from the resistor's rated value.
diodes or transistor junctions, causing them to conduct.
Figure
Keysight U1190A Series User's Guide
2-9. Probe the
