Omega Engineering FMG90 ユーザーズマニュアル

 

 

Construction:  
The measuring tube with its earthing sleeves and electrodes 
passes through the sensor housing and forms the external 
process connection of the FMG90.  
A magnetic field for the measurement process is generated inside 
the sensor housing, which also contains the sensor and signal 
conditioning circuitry.  
The two stainless steel electrodes are located in the middle of the 
measuring tube between the earthing sleeves. The FMG90 does 
not need any moving parts to make measurements. The inside of 
the measuring tube is completely open, allowing the fluid to flow 
unhindered through the measuring tube. 
 
 

Function: 
The magnetic inductive flow sensor functions according to the induction principle:  
 
The measuring tube is located in a magnetic field (B). If 
an electrically conductive medium (V) flows through the 
measuring tube and, therefore, at right angles to the 
magnetic field, a voltage (U) which is proportional to 
the mean flow velocity will be induced in the medium 
and subsequently picked up by the two electrodes. 

 
 

 
 
 

 

Before installing, check that 
 
ˆ

  the wetted materials of the device are suitable for the media being used (see Materials 

Table "10.1"). 

ˆ

  the equipment is switched off and is in a safe and de-energised state. 

ˆ

  the equipment is depressurised and has cooled down. 

 

SUITABLE TOOLS: 

 

Use only suitable tools of the correct size.