Onicon FT-3500 - FT-3500 Installation, Removal & Adjustment; Installation Site Selection

FT
-
3500 ELECTROMAGNETIC FLOW METER
ONICON Incorporated 727.447.6140 Page 14 onicon.com
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.” For closed loop applications, consider both the supply and return lines as
possible locations.
IMPORTANT NOTE
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.
SECTION 3.0: INSTALLATION, REMOVAL AND ADJUSTMENT
WARNING
Insertion ow meters may be installed in pipes which are under high pressure. Accidents with these systems can
cause serious injury or death. Only persons experienced with high pressure systems and related knowledge in the
heating, cooling and uid metering elds should attempt to install, adjust, or remove the ow meter. Please read
all instructions before attempting to insert or remove a ow meter.
ONICON will be happy to assist with technical recommendations and to provide guidance by telephone (727-447-6140) or
e-mail (techsupport@onicon.com). On-site eld engineering, installation and service is also available at additional cost.
3.1 INSTALLATION SITE SELECTION
Install the ow meter where it will be accessible for personnel to perform necessary periodic maintenance. The clearance
required for installation is typically 30-40” from the pipe wall to the nearest obstruction above the valve assembly. This
clearance dimension will increase with large diameter pipes. The environment should be free of corrosive liquids/fumes,
temperature extremes and heavy vibration. The following diagrams should be used as a guide to the proper location for
installing the meter.
GENERAL PRACTICES:
1. For best results, install the ow meter in a straight run of pipe, free of bends, tees, valves, transitions, and
obstructions.
2. Straight run requirements vary based on the nature of the upstream obstruction.
See the table on the following page for guidelines in determining minimum up stream straight run
requirements based on the nature of the obstruction.
Note: Depending upon specic location details, more or less straight run may be
required to produce a satisfactory ow prole.
3. If there is insucient straight run, allow 80% of the run upstream and 20% of the run downstream. If the
total length of straight run is less than 70% of the recommended length, performance may seriously
degrade, and consideration should be given to changing to the FT-3000 Series Inline Electromagnetic
Flow Meter.