PULSAR MEASUREMENT 
 
87 
 
Example 1 ‘V’ Notch   Weir 
 
 
 
In this example, it is required to calculate the flow through a Simple 
Exponential Device, which on this occasion is a V-Notch Weir. Ratiometric 
calculation will be used, to use the customers declared maximum flow, there 
is no requirement for alarms and the flow rate is to be displayed in 
litres/second. The totaliser is to record the flow in cubic metres but is not to 
be displayed during RUN. 
The distance from the end of the transducer horn (dB Mach 3) to zero flow 
(P105) is 1 metre and max head (P704) is 0.4 metres, maximum flow 
(P705) is known to be 96.5 litres/second.