ONICON F-5200 Insertion - Manual (Page 12)

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F-5200 Insertion Thermal Mass Flow Meter Manual 05/14 - 0756-8 / 19475
Page 12
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.
Upstream obstruction
Minimum straight run required upstream of meter location
(A) Without Flow Conditioner (B) Upstream of Flow Conditioner
Single bend preceded by ≥ 9 diameters of
straight pipe
15 Diameters 3 Diameters
Pipe size reduction in straight pipe run 15 Diameters 3 Diameters
Multiple bends in plane with < 9 diameters
of straight pipe between them
20 Diameters 9 Diameters
Pipe size expansion in straight pipe run 30 Diameters 10 Diameters
Tees 30 Diameters 10 Diameters
Multiple bends out of plane 40 Diameters 5 Diameters
Modulating or regulating valve 40 Diameters 10 Diameters
Diaphram or ROOTS type utility meter 40 Diameters 10 Diameters
IMPORTANT NOTICE
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.
i
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.”
2 X Diameter
• For 1” and larger diameter pipes
• Install in vertical or horizontal pipe
• For horizontal pipe position meter
anywhere in upper 180°
CLEARANCE
REQUIRED
FOR INSTALLATION
30” - 36”
Depending on
pipe size
Vertical pipe position
2 Dia. B*
A* 5 Dia.
FLOW
2 Dia.
B*
A*
5 Dia.
FLOW
FLOW DIRECTION
FLOW DIRECTION
•
For 1” and larger diameter pipes
•
Install in vertical or horizontal pipe
•
For horizontal pipe position meter
anywhere in upper 180º