Fluke CNX v3000 Manual - Page 31

Frequency Measurement

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Frequency Measurement A frequency measurement is a count of the number of times an ac voltage or current signal passes through a threshold point each second. The Product autoranges to one of four frequency ranges: 99.99 Hz, 999.9 Hz, 9.999 kHz, and 99.99 kHz. Below are some hints for frequency measurements: • If a measurement shows 0 Hz or is not stable, the input signal can be below or near a trigger level. A lower range increases the sensitivity of the Product and can usually repair these problems. • An input signal with distortion can cause a frequency measurement to be higher than usual. The distortion can cause the frequency counter to sense multiple triggers. A higher voltage range decreases the input sensitivity and can correct this problem. In general, the lowest frequency is the correct one. Set up the Product as shown in Figure 8 to measure frequency. Wireless Multimeter Basic Measurements 23 MyFlukeStore Shop for Fluke products online at: www. .com 1.877.766.5412

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Wireless Multimeter
Basic Measurements
23
Frequency Measurement
A frequency measurement is a count of the number of
times an ac voltage or current signal passes through a
threshold point each second.
The Product autoranges to one of four frequency ranges:
99.99 Hz, 999.9 Hz, 9.999 kHz, and 99.99 kHz.
Below are some hints for frequency measurements:
•
If a measurement shows 0 Hz or is not stable, the
input signal can be below or near a trigger level. A
lower range increases the sensitivity of the Product
and can usually repair these problems.
•
An input signal with distortion can cause a frequency
measurement to be higher than usual. The distortion
can cause the frequency counter to sense multiple
triggers. A higher voltage range decreases the input
sensitivity and can correct this problem. In general,
the lowest frequency is the correct one.
Set up the Product as shown in Figure 8 to measure
frequency.
Shop for Fluke products online at:
1.877.766.5412
www.
MyFlukeStore
.com