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2
Making Measurements
– Measuring the frequency of a signal helps detect the presence of harmonic
NOTE
– Frequency is the number of cycles a signal completes each second.
– The multimeter measures the frequency of a voltage or current signal by
Rise time
Rise Time
Figure 2-17
Pressing
frequency range.
1 To measure frequency, rotate the switch to one of the primary functions
To obtain the best measuring results for frequency measurements, use the AC
NOTE
measuring path.
2 Probe the test points and press
76
currents in neutral conductors and determines whether these neutral
currents are the result of unbalanced phases or non-linear loads.
Frequency is defined as 1/Period. Period is defined as the time between the
middle threshold crossings of two consecutive, like-polarity edges, as shown
in Figure 2-17.
counting the number of times the signal crosses a threshold level within a
specified period of time.
Fall time
Fall Time
+ Width
+ Width
Frequency measurement
Auto
controls the input range of the voltage or ampere and not the
Range
allowing frequency measurements highlighted in Table 2-11.
– Width
– Width
Period
Period
MaxMin
. Read the display.
Hz
Keysight U1241C/U1242C User's Guide
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