Fig. 6 : Measurement principle,  state-of-art weighting balance system : 
  
    
      
        
          F
          
            M
          
        
      
    
    {\displaystyle F_{M}}
  
-measurement force, 
  
    
      
        
          F
          
            G
          
        
      
    
    {\displaystyle F_{G}}
  
-gravity, 
  
    
      
        
          F
          
            C
          
        
      
    
    {\displaystyle F_{C}}
  
-force due to spring constant, 
  
    
      
        
          c
          
            s
          
        
      
    
    {\displaystyle c_{s}}
  
-spring constant, 
  
    
      
        
          l
          
            p
          
        
      
    
    {\displaystyle l_{p}}
  
-length of beams, a -deflection of pan carrier, 
  
    
      
        
          a
          
            a
            b
          
        
      
    
    {\displaystyle a_{ab}}
  
-deflection of lever, 
  
    
      
        α
      
    
    {\displaystyle \alpha }
  
 -deflection angle, 
  
    
      
        
          m
          
            0
          
        
      
    
    {\displaystyle m_{0}}
  
-dead load, 
  
    
      
        g
      
    
    {\displaystyle g}
  
 -gravitational acceleration. Adapted from [17]