| 摘要 |
PURPOSE: A rotor RPM measuring apparatus for positive displacement flow-meter, which can reduce the cost for maintenance and repair, is provided to accurately measure the rotation number of a rotor by being attached to a positive-displacement meter using a general purpose encoder. CONSTITUTION: A rotor RPM measuring apparatus for positive displacement flow-meter comprises an encoder(10), a base adapter(20), an encoder adapter(30) and a connection shaft(40). The encoder comprises a rotary shaft(11) projecting to downward. The base adapter comprises an inserting hole formed on the center part of the rotor RPM measuring apparatus. The encoder adapter is fixed to the base adapter. The upper end of the connection shaft is connected to the rotary shaft of the encoder. |
