CF-5200 Frequently Asked Questions

as a reason

(1) The rotation pulse signal is not being captured properly.
Please ensure that the current rotation display is shown accurately.

(2) Slow down the rotation change.
At low speeds, the sampling frequency is low, and it takes time for data sampling, which delays the FFT.
Additionally, it takes time to measure the rotation speed, making it difficult to determine whether the rotation has reached the data collection speed.
The measurable lower limit of rotation speed is considered to be below 20 r/min, which may result in the rotation speed falling below the measurement limit in the sample.

Chapter of the relevant instruction manual

3.6 Setting of External Input Signals