Keysight Technologies U1273A Guide De L'utilisateur page 72

2 Making Measurements
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 multimeter's test current flows through all possible paths
– The resistance function can produce enough voltage to forward-bias silicon
Measuring conductance
Conductance is the reciprocal of resistance. High values of conductance
correspond to low values of resistance. Conductance is measured in Siemens (S).
The 300 nS range measures conductance in nano-Siemens (1 nS = 0.000000001
Siemens). Because small conductance values correspond to extremely high
resistance values, the nS range allows you to easily calculate and determine the
resistance of components up to 100 GΩ (0.01 nS resolution)
To measure conductance, set up your multimeter to measure resistance as shown
in
unit shown). Probe the test points, and read the display.
High-resistance readings are susceptible to electrical noise. Use averaging to
smooth out most of the noisy readings. Refer to
Minimum Values (MaxMin)"
72
test the leads, touch the probe tips together and read the resistance of the
leads. To remove lead resistance from the measurement, hold the test lead
tips together and press
subtracted from all future display readings.
between the probe tips, the measured value of a resistor in a circuit is often
different from the resistor's rated value.
diode or transistor junctions, causing them to conduct. If this is suspected,
press to apply a lower current in the next higher range.
Figure 2-14. Press
. Now the resistance at the probe tips will be
until the conductance measurement is selected (nS
on page 110.
Keysight U1273A/U1273AX User's Guide
"Capturing Maximum and