EKO INSTRUMENTS CO., LTD. Ventilation Unit MV-01 Instruction Manual Ver. 4
Pg. 13
5 - 3 . Ve n t i l a t o r Ta c h o m e t e r
1. Tachometer Signal
The tach output can be monitored and conveys rpm information in the form of a square wave (2 block pulses
per revolution). The frequency of this square wave output is proportional to the rotation of the shaft. The tacho
signal can be measured using a frequency meter or pulse counter (12VDC / Pulse signal ~100Hz /
~2,900rpm).
*Fixed resistance of 2
kΩ shown on the above figure is not provided and need to be prepared by customer.
(F
ixed resistance more than 2kΩ can be measured.)
1/2
Rotation
100.0 Hz
2
kΩ
Frequency
Meter
Fan Power Supply
12.0 Vdc
Figure 5-3. Tachometer Signal
