How to Measure Frequency and Duty Cycle | Fluke 87V Industrial Multimeter

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In this video, learn how to measure frequency and duty cycle using the Fluke 87V Industrial Multimeter.

As a quick review, frequency is how fast a signal is moving (measured in cycles per second). To measure frequency on the Fluke 87V, simply press the "Hz %" button.

When measuring frequency on motor drives, a regular multimeter will not accurately measure frequency. This is due to the motor drive taking the normal sin wave signal and turning it into a pulse-width modulated signal. The Fluke 87V Low Pass Filter feature allows you to measure the pulse-width modulated signal accurately, giving you an accurate frequency measurement.

Duty Cycle is the ratio of time a load or circuit is ON compared to the time a load or circuit is OFF. Duty Cycle can help determine the health of your power system. To measure duty cycle on the Fluke 87V, simply press the "HZ %" button again.

From the control room to the plant floor, the Fluke 87V Industrial Digital Multimeter has earned its reputation as the digital multimeter industrial technicians trust most.

The Fluke 87V Industrial Multimeter provides the resolution and accuracy to efficiently troubleshoot motor drives, plant automation, power distribution, and electromechanical equipment even in loud, high energy, and high altitude locations. A low pass filter supports accurate frequency measurements on VFDs and captures intermittents as fast 250 µS.

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