Flow rate measurement 0 - 2000 m3/h
Mass flow totalizer
Ultrasonic sensor with built-in preamplifier permits installation up to 200m from panel instruments
Easy installation and calibration
The MFC 2 flow measuring system for open channels is mainly used to measure water flow to and from waste water treatment plant and from industrial outlets.
The robust design of the MFC 2 ensures great reliability and long life under severe conditions.
The MFC 2 flow measuring system consists of :
Ultrasonic distance sensor, type US 270, to measure the liquid height at the inlet of the Parshall flume.
Measuring instrument, type MF 275, with digital level (cm) and flow rate (m3/h) indication.
Integrating flow totalizer, type CN 670, with summing capability up to 200000 m3, reset ability by the user and integral extra long life battery to preserve data in case of mains power failure.
Parshall type flume (2", 3", 6", 9" ή 12")
The MF 275 measuring instrument and the CN 670 totalizer are suitable for panel mounting (dimensions according to DIN43700).
The output section of the MFC 2 system provides analog voltage (0-2V), analog current (4-20 mA) and pulse outputs. So the system can be connected to a recorder, PLC (via an A to D device) or auxiliary control devices such as the units PL 201 (for on/off set points) and PL 215 (chlorination P/I controller), extending the control capabilities of the system and offering the ideal solution for almost any relative application.
The measuring flume is designed to be cast into concrete. When water flows through the channel, the water level rises at the inlet of the flume. The Parshall flume ensures a precise relation between the water level hight ant the fow rate, according to the equation : Q = k x hn.
The selection of the flume size depends from the expected maximum flow rate. The values of the constant "k" and the exponent "n" depend also from the flume size.
The US 270 ultrasonic distance sensor must be mounted over the inlet of the flume and measures the distance from the liquid level. The MF 275 flow meter converts the output signal of the sensor to level height and calculates the flow rate.
The CN 670 totalizer, integrates the measured flow rate and displays the total volume of water that has passed through the channel.
The MFC 2 system may also be used for flow measurements with trapezoid notch weirs. (The user's manual includes detailed description of the method and instructions for the design and installation of the trapezoid notch weir. Also includes detailed drafts for manufacturing Parshall type measuring flumes).