Pulsar ULTRA 5, Instruction Manual

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131
R
ATIOMETRIC
V-Notch Angle Weir (Non-BS 3680)
If the flow calculation is to be ratiometric P702 = 2 the flow will be
calculated using the formula: q= q
cal
(h+kh/h
cal
+kh)
2.5
Where: q = flowrate
q
cal
= flowrate at maximum head P705
h = head
kh = compensated head
Universal Calculations
Point of Measurement
The transducer must be above the maximum head P704 by at least the near
blanking distance P107 .
For all Universal calculation applications, the point at which the head is
measured should be chosen such that the surface of the liquid is not effected
by turbulence.
Calculations
A
BSOLUTE
Universal Head Vs Flow
If the flow calculation is to be absolute P702 = 1 the flow will be calculated
using the formula: q = q(h)
Where: q = flowrate
q(h) = flowrate for head
The desired number of Breakpoints , ( P730 - P793 ) are to be entered in
pairs in values of head and corresponding flow . (Minimum of 2 pairs of
Breakpoints is required).