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Question
Which parameter should be set in order to display the K3NR Digital Panel Indicator's rotation speed?
Answer
When you want to display the rotation speed on the K3NR, the rotation speed will be expressed as:
Rotation speed (rpm) = Input frequency f (Hz) × 60 × α.
α = Prescale value
When displaying rpm with 2 pulses/rotation, make the following settings from the setup menu.
When 2 pulses are output/revolution, α = 1/N = 1/2 = 0.5 = 5.0000 × 10-1 m:
Reference: Calculating the Prescale Values
| Equation variables | Display units | Prescale value (a) |
| Speed | rpm | 1/N |
| rps | 1/60N | |
| Frequency (of input pulses) | Hz | 1/60 |
| kHz | 1/60000 | |
| Circumferential speed | mm/s | 1000 πd/60N |
| cm/s | 100 πd/60N | |
| m/s | πd/60N | |
| m/min | πd/N | |
| km/h | 0.06 πd/N |
N: Number of pulses per rotation
πd: Circumference (units: m)
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