Patent ID: 11885659
Assignee: ROTA YOKOGAWA GMBH & CO. KG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for compensating the influence of at least one of the parameters from the group consisting of flow rate, viscosity, density and Reynolds number (Re) of a fluid to be measured, on the measured flow rate and/or density of this fluid in a Coriolis mass flow meter, comprising:
determining a compensation value (Mf(Re)) for the flow rate and/or density of the fluid to be measured using the following equation, M
          f
         
         (
         
          R
          ⁢
          e
         
         )
        
        =
        
         
          
           f
           max
          
          2
         
         ·
         
          {
          
           1
           -
           
            tanh
            (
            
             
              -
              
               2
               
                f
                max
               
              
             
             ·
             
              
               d
               ⁢
               
                M
                f
               
              
              
               d
               ⁡
               (
               
                
                 log
                 
                  1
                  ⁢
                  0
                 
                
                ⁢
                R
                ⁢
                e
               
               )
              
             
            
           
          
         
        
       
       
        ❘
        "\[RightBracketingBar]"
       
      
      
       
        R
        ⁢
        e
       
       =
       
        R
        ⁢
        
         e
         c
        
       
      
     
     ·
     
      
       
      
       [
       
        
         
          log
          
           1
           ⁢
           0
          
         
         (
         
          R
          ⁢
          e
         
         )
        
        -
        
         
          log
          
           1
           ⁢
           0
          
         
         (
         
          R
          ⁢
          
           e
           c
          
         
         )
        
       
       ]
      
     
    
    )
   
   }
  
  ,, where fmax is the maximum compensation value (Mf(Re)) for Reynolds numbers (Re) approaching zero, Rec is the Reynolds number (Re) at which the curve of the compensation value (Mf(Re)) has the largest slope, and, d
     ⁢
     
      M
      f
     
    
    
     d
     ⁡
     (
     
      
       log
       
        1
        ⁢
        0
       
      
      ⁢
      R
      ⁢
      e
     
     )
    
   
   
    ❘
    "\[RightBracketingBar]"
   
  
  
   
    R
    ⁢
    e
   
   =
   
    R
    ⁢
    
     e
     c, is the slope of the curve of the compensation value (Mf(Re)) at the point Rec, and correcting the value measured by the Coriolis mass flow meter for the flow rate and/or the density of the fluid to be measured using the compensation value (Mf(Re)).