ULTRA 4 INSTRUCTION MANUAL 
 
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If P700 = 2 (BS 3680 Flume) 
Select from the following options: 
1 = Rectangular          
2 = Rectangular with hump     
3 = U-throated  
4 = U-Throated with hump 
If P700 = 3 (BS 3680 Weir) 
Select from the following options: 
1 = Rectangular     
2 = V-Notch 90-degree (full 90
o
) 
3 = V-Notch 53 degree 8’ (half 90
o
)  
4 = V-Notch 28 degree 4’ (quarter 90
o
)   
5 = Broad crested (Rectangular) Weir 
If P700 = 5 (Special) 
Select from the following options: 
1 = Palmer-Bowlus Flume            
2 = H-Flume     
3 = V-Notch angle (other than BS3680) 
If P700 = 6 (Universal) 
Where the Primary Measuring device does not match any of the devices 
contained in the above categories then a universal volume calculation can 
be performed. A head Vs flow chart is used, to enter several Breakpoints for 
head and flowrate (P730-793), which is either provided by the manufacturer 
or created based on the dimensions of the device. 
Select from the following options: 
1 = Universal Linear flow calculation        
2 = Universal Curved flow calculation