Siemens MultiRanger 200 Application Manual page 7

Parameter #
P620
P621
Section 5.0 Universal Curved Flow Calculation (P600 = 5)
The MultiRanger calculates the flow rate using the same method as the linear flow calculations. It differs by applying a curved
fitting between the discrete points.
Section 5.1 Universal Curved Flow Calculation Equation
The MultiRanger 200 calculates flow rate (Q) based on Ratiometric calculation method using 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.).
Q Maximum flow (at maximum head H
max
as a standalone number with no units indicated. User must know measurement units used.
For example, if maximum flow is 1000 LPS then P604 = 1000 and P606 = seconds.
H Maximum Head H
max
as span configured in P007. The units are defined in P005.
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.
f(H) Calculated by MultiRanger 200 using polynomial function
Section 5.2 Universal Curved Flow Calculation Configuration Table
Parameter #
P600 Set to 5 (universal curved flow calculation)
P603 Enter the value of H
P604 Enter the value of Q
P606 Time units
P610 Enter sequentially from lowest head value in break point 1
(Secondary (generally 0) and gradually increasing up to maximum 32
Indices 1 – 32 head break points. The units are as set in P005.
max)
P611 Sequentially enter corresponding flow values for above
(Secondary head break points starting form lowest flow value in
Indices 1 – 32 break point 1 (generally 0) and gradually increasing up to
max) maximum 32 flow break points. The time units are as set
in P606.
P605 Zero Head Off-set
MultiRanger 200 and Flow Configuration
Description
Low flow cut-off
Auto zero head calibration
Q = Q
as configured in P603. Its value is provided by the user. Generally the same value
max
Description
max.
max.
x f(H)/f(H )
max max
Value Table
) as configured in P604. Its value is user provided, and is shown
max
AG040303
APPLICATION GUIDE
Configuration Priority
Optional, to avoid totalizing at flows
below this set level
Optional, configured if displayed head
has constant off-set
Configuration Priority
Must be configured.
Must be configured.
Must be configured.
Must be configured.
Must be configured.
Must be configured.
Configured only when the actual zero
is above channel zero
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