Siemens MultiRanger 200 Application Manual page 8

Parameter #
P607 Flow rate decimal
P620 Low flow cut-off
P621 Auto zero head calibration
Section 6.0 BS-3680/ISO 4359 Rectangular Flume (P600 = 6)
For flowrate calculation, this method requires only the physical dimensions of the flume:
Section 6.1 BS-3680/ISO 4359 Rectangular Flume Flow Calculation Equation
The MultiRanger 200 calculates flow rate (Q) based on the Absolute calculation method confirming to BS 3680 Part 4C standard
for Rectangular flumes and uses the following equation:
Q Flow rate calculated and displayed by MultiRanger 200. The units will not be displayed and user must
know the measurement units used (liters/sec. or gallons/min. etc.).
g Acceleration due to gravity
B Throat width
h Head measured by the ultrasonic head, or any other level measuring device, mounted upstream from
the open channel measuring device. IMPORTANT: set in the same units selected in P005.
C Velocity coefficient calculated by MultiRanger 200
v
C Shape coefficient (= 1 here)
s
C Discharge coefficient calculated by MultiRanger 200
d
MultiRanger 200 and Flow Configuration
Description
B Approach channel width
b Throat width
p Hump height
L Throat length
1.5 0.5
Q = (2/3) x (g) x Cv x Cs x Cd x B x (h)
Value Table
AG040303
APPLICATION GUIDE
Configuration Priority
Optional, configured to display the
flow rate (Q). Factory set to 2
Optional, to avoid totalizing at flows
below this set level
Optional, configured if displayed
head has constant off-set
1.5
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