Application characteristics and principle of flow quantitative controller

Usage and characteristics

Flow quantitative control instrument is a new flow measurement control instrument developed by using advanced single chip microcomputer technology.Flow quantitative control instrument has the advantages of small volume, light weight, simple operation, direct reading display, clarity and high reliability. It is equipped with flow sensors and solenoid valves for pulse output such as turbine and vortex street to form a flow control system, which is suitable for flow quantitative control in petroleum, chemical industry, medicine and food industry.

Flow quantitative control instrument with 8-bit digital tube and 51 line light column real-time display of the current batch progress, intuitive.

The flow quantitative control instrument has a good man-machine interface, easy to modify the set value and control operation.

The flow quantitative controller is equipped with relay of large-capacity contact and power failure protection device, with high reliability and long life.

Working principle

According to the calculation formula of pulse output flow sensor

Q = N/K

Where Q-- cumulative flow rate (unit liter)

N-- number of pulse of flow signal (times)

K-- meter constant (d/l)

Put instrument constants in controller, control instrument on the basis of the number value automatically calculate the corresponding pulse, quantitative control flow meter starts to change the built-in relay status, makes the control valve to open and control instrument to count of signals from the sensors in the flow, arrived at a quantitative restore the original state, to the relay control valve will be closed, so as to realize the quantitative control of the pipe flow.

Iii. Technical parameters

The measuring medium is determined by the flow sensor

Input signal 1-400hz, square wave low < 1.5v high > 4.5v

Quantitative range 0.1-99999999 litres

4 can be put into the instrument constant maximum 999999 times/l

Provide 12DV, 50mA power supply for the sensor

6 environmental conditions 0-45℃ relative humidity is less than 85%

Power supply 220V (187-242) AC 50HZ

8 8 bit LED display cumulative total value light column display batch progress

The accumulative total amount, instrument constant and previous quantitative value shall be protected by power failure for more than 10 years.