Siemens 7ML19985AB01 instruction manual ‘U’ parameters required ‘U’ parameters calculated

BS-3680 Rectangular Flume, P3 = 1
‘U’ parameters required *			‘U’ parameters calculated **
U0	= approach width	B	U4	= Cv
U1	= throat width	b	U5	= Cd
U2	= hump height	p	U6	= A
U3	= throat length	L

*obtain from manufacturer’s specifications.

**calculated by OCM-3. May be viewed by accessing ‘U’ parameter.

Reference

ABSOLUTE CALCULATION, P4 = 0¤
For flows that can be calculated by the equation:
q = (2/3)1.5 x g0.5 x Cv x Cs x Cd x B x h1.5
where : q = flow rate	Cv = velocity coefficient
b = throat width	Cs = shape coefficient
g = gravitational acceleration	Cd = discharge coefficient
h = head
RATIOMETRIC CALCULATION, P4 = 1¤
For flows that can be calculated by the equation:
q = qcal x Cd/Cdcal x Cv/Cvcal x (h/hcal)1.5

where : q = flow rate

qcal = flow rate at maximum head h = head

hcal = maximum head Cv = velocity coefficient

Cvcal = velocity coefficient for maximum head

Cd = discharge coefficient for head

Cdcal = discharge coefficient for maximum head

¤Refer to Operation \ Flow Calculation.

7ML19985AB01 OCM III 58