Onicon F-5200 Installation And Operation Manual page 12

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Always use the maximum available straight run. When more than the minimum required straight
run is available place the meter such that the excess straight run is upstream of the meter location.
The flow meter must be properly installed with respect to the direction of flow. Installing the
meter with the UPSTREAM label facing downstream will result in significant errors in the flow
measurement.
In addition to the information provided above and on the previous page, the following diagram
and table should be used as a guide to the proper location for installing the meter.
• For 1" and larger diameter pipes
• For 1" and larger diameter pipes
• Install in vertical or horizontal pipe
• Install in vertical or horizontal pipe
• For horizontal pipe position meter
• For horizontal pipe position meter
anywhere in upper 180º
anywhere in upper 180°
2 X Diameter
Upstream obstruction
Single bend preceded by ≥ 9 diameters of
straight pipe
Pipe size reduction in straight pipe run
Multiple bends in plane with < 9 diameters
of straight pipe between them
Pipe size expansion in straight pipe run
Tees
Multiple bends out of plane
Modulating or regulating valve
Diaphram or ROOTS type utility meter
How to Determine the Available Straight Pipe Diameters:
For each application, locate the longest straight, unobstructed section of pipe (no bends,
tees, valves, other insertion probes, size transitions).The longest straight pipe run in
inches divided by nominal pipe size in inches equals "diameters of straight pipe."
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IMPORTANT NOTICE
CLEARANCE
REQUIRED
FOR INSTALLATION
30" - 36"
Depending on
pipe size
B*
A*
Minimum straight run required upstream of meter location
(A) Without Flow Conditioner
15 Diameters
15 Diameters
20 Diameters
30 Diameters
30 Diameters
40 Diameters
40 Diameters
40 Diameters
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Vertical pipe position
FLOW DIRECTION
FLOW
2 Dia.
5 Dia.
(B) Upstream of Flow Conditioner
3 Diameters
3 Diameters
9 Diameters
10 Diameters
10 Diameters
5 Diameters
10 Diameters
10 Diameters