Page 72 MultiRanger 100/200 – INSTRUCTION MANUAL 7ML19981FB05
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Open Channel Monitoring
MR 200
Open Channel Monitoring (OCM)
[MR 200]
An OCM installation is defined one of three ways, based on the Primary Measuring
Device (PMD):
1. Dimensional (P600 = 2,3,6,7)
For some common weir and flume types. PMD dimensions (P602) are entered directly.
• BS-3680 / ISO 1438/1 Thin plate V notch weir on page 74
• BS-3680 / ISO 4359 Rectangular Flume on page 75
• Palmer Bowlus Flume on page 76
• H Flume on page 77
2. Exponential (P600 = 1)
For most other weir and flume types. PMD exponents provided by the manufacturer are
entered. Flow is calculated using the exponent (P601) and the maximum values (P603 and
P604).
• Standard Weirs on page 78
• Parshall Flume on page 79
• Leoplod Lagco on page 80
• Cut Throat Flume on page 81
3. Universal (P600 = 4,5)
For all other PMDs, the head-to-flow curve can be plotted based on known breakpoints,
usually supplied by the PMD manufacturer.
• Typical Flow Characterization on page 82
• Example Flumes on page 83
• Example Weirs on page 83
Common Parameters
These Quick Start parameters are required for all installations.
Parameter Index Value Description
P001 G 6 Operation = OCM
P002 G 1 Material = liquid
P003 G 2 Max. Process Speed = medium
P004 G 102 Transducer = XPS-10
P005 G 1 Units = meters
P006 G 1.8 Empty = 1.8m
P007 G 1.0 Span = 1.4m
P801 G 0.8 Range Extension to avoid LOE
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