4230 Flow Meter
Section 2 Programming
2-33
If you select HS for the type of flume, the following display will
appear:
If you select H FLUME, the following will appear:
If you select HL FLUME, the following will appear:
If you select TRAPEZOIDAL for the type of flume, the following
will appear:
(This completes the section on WEIR/FLUME flow conversions.)
Returning to step 2, SELECT FLOW CONVERSION: If you
select EQUATION the following will appear:
This step allows you to enter an equation that is appropriate for
your flow situation. The equation is expressed in the general
form of Q = k1H
P1
+ k2H
P2
, where Q = flow rate, k1 = a constant,
H = level or head, and P1 is the power to which H is raised. k2
and P2 are a second constant and power found in some equa-
tions. If your equation has only one term, you should enter 0 for
the second constant.
Again returning to step 2, SELECT FLOW CONVERSION, if
you select MANNING, the following display will appear:
TRAPEZOIDAL is also available, if you move to the right with
the right arrow key.
If you select ROUND PIPE for the Manning flow conversion, the
following displays will appear:
HS FLUME SIZE
• 0.4' • • 0.5' • • 0.6' • • 0.8' • • 1.0' •
H FLUME SIZE
• 5' • • .75' • • 1' • • 2' • • 2.5' • • 3' • • 4.5' •
HL FLUME SIZE
• 2.0' • • 2.5' • • 3.0' • • 3.5' • • 4.0' •
TRAPEZOIDAL SIZE
• LG 60 V • • 2" 45 WSC • • 12” 45 SRCRC •
ENTER EQUATION UNITS
Q = XXX.XXXH^X.XX + XXX.XXXH^X.XX
SELECT MANNING TYPE
• ROUND PIPE • • U-CHANNEL • • RECTANGULAR • • T–
MANNING ROUND PIPE
SLOPE = X.XXXXX ROUGH = X.XXXX
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