Frequently Asked Questions about the Tachometer

1. Measurement Accuracy

The accuracy of the rotational speed values obtained through measurement.

◆ ±2 × rotational speed resolution［r/min］±1 count

* Rotational speed resolution = Frequency range [Hz] ÷ 6400 × 60 ÷ Set pulse number [P/R]

The accuracy of rotational speed depends on the frequency range.

2. Setting Accuracy

The accuracy of the frequency value set during measurement.

◆ ±0.5 % of F.S.

(for example)

When the set frequency is 10,000 Hz in the 10 kHz range, the actual value is fluctuating in the range of 9,950 to 10,050 Hz.

3. Linearity

It is the linearity of the analog voltage output of the rotational speed.

◆ ±0.3 % of F.S.

(for example)

When the set frequency is 10,000 Hz in the 10 kHz range, the measured values fluctuate between 9.97 and 10.03 V.