1. Introduction

To give the best performance, KROHNE flowmeters must be installed in a correct way. Important instructions should be taken into

consideration, like the inlet and outlet length, pipe to be completely filled, direction of the flow, etc. Depending on the measuring principle of each device, the guidelines will differ. In this article we will explain the installation instructions for clamp-on Ultrasonic flow meters (OPTISONIC 6300 and OPTISONIC 6300 P).



2. Installation Guidelines

  • Mount the sensor rail at least 10 DN downstream of a flow disturbance like elbows, valves, headers or pumps, and at least 5 DN outlets after the device.
  • It is recommended to install the device at an angle of 120 degree.
  • Always install the sensor at a non-insulated part of the pipe. Remove any insulation if necessary!     
  •  Make sure that the measuring tube is always completely full. For this reason install on slightly ascending pipe section or install on a lowered section of the pipe to ensure a full pipe condition through the meter.  

  


  • If not possible, make sure that the flow velocity is high enough to prevent air, gas or vapor to collect in upper part. 
  • The clamp-on flowmeter will report incorrect flow rates or not measure in case of partially filled pipes.
  • Make sure that the pipe is fully filled at all times. 
  • Always install control valves downstream of the flowmeter in order to avoid cavitation or distortion of the flow profile. 


  • Never install the flowmeter at the suction side of a pump in order to avoid cavitation or flashing in the flowmeter 


NOTE:

For OPTISONIC 6300 and OPTISONIC 6300P the following information will be required:

  •  The outside diameter of the pipe.  
  •  The pipe wall thickness. A pipe wall thickness gauge or pipe tables can be used for this. 
  •  The material of the pipe.  
  •  If the pipe has a liner, the liner material and the thickness of the line.