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To set-up an application for a device contained in special, choose 3 for Flow 
followed by 5 for Special. You then need to select the primary measuring 
device for  your application  from the  following available  options:  palmer 
bowlus flume, H-flume or a V notch, other than BS3680. 
For devices which do not match any of the above devices the application can 
be setup using a universal flow calculation, to select this option choose 3 
for Flow followed by 6 for universal. You then need to select the primary 
measuring device for your application from the following available options: 
linear flow or curved flow.  
Once  you  have  chosen  your  application  you  will  be  asked  a  series  of 
questions which are answered by choosing the appropriate option as detailed 
in the flow chart below. Once all of the questions have been answered you 
will  be  prompted to  provide further  information,  as  detailed  in  the  tables 
below, in order to complete the programming of the unit.