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7ML19981FB05 MultiRanger 100/200 – INSTRUCTION MANUAL Page 165
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Open Channel Monitoring (P600 to P621) [MR 200]
Open Channel Monitoring (OCM) operation is a MultiRanger 200 feature only.
If the MultiRanger is used to monitor open channel flow, alter the following parameters
as required and run a calibration as described in P621.
The MultiRanger measures head as referenced to Empty (P006) or OCM Zero Offset
(P605), when Operation is set for OCM (P001 = 6). Flowrate, based on head (at the point of
measure specified by the Primary Measuring Device fabricator) is also calculated and
displayed on the LCD.
Some Primary Measuring Devices require a longer Range Extension (P801) to avoid
entering the LOE failure state if the water level falls below the zero point of the Primary
Measuring Device. See
P801 Range Extension
on page 200 for more information.
P600 Primary Measuring Device [MR 200]
The type of primary measuring device (PMD) used.
Note:
See
Open Channel Monitoring
(OCM) on page 72 for application examples
involving common weirs and flumes.
Primary Index
Single Point Model Dual
Global Transducer
Values
0 * off (no calculation)
1 Exponential (see P601)
2 Palmer-Bowlus Flume (see P602)
3 H-Flume (see P602)
4 Universal Linear Flow Calculation (see P610, P611)
5 Universal Curved Flow Calculation (see P610, P611)
6 BS-3680/ISO 4359 Rectangular Flume (see P602)
7 BS-3680/ISO 1438/1 Thin Plate V-Notch Weir (see P602)
Alters
• P601 Flow Exponent
• P602 Primary Measuring Device Dimensions
• P608 Flowrate Units
Altered By
• P001 Operation
Related
• P603 Maximum Head
• P604 Maximum Flow
• P605 Zero Head
• P610 Head Breakpoints
• P611 Breakpoint