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General Installation Information
GENERAL INSTALLATION INFORMATION
Before installing the meter:
•
Find an area for installation away from large electrical motors, transformers or other devices that can produce high
electromagnetic or electrostatic fields The vortex transmitter contains electric circuitry that can be affected by
these interferences
•
Proper grounding is required to eliminate electrical noise which may be present within the fluid and piping system or in
the near vicinity of the vortex transmitter Use exterior grounding strap for non-conductive piping systems to provide a
path to earth ground Properly ground pipes in conductive piping systems
Flow Rate and Range Requirements
Most manufacturers state flow range capabilities by publishing the maximum allowed flow rates Then they provide a
turndown ratio to determine minimum flow rate To use the turndown ratio, simply divide the maximum rate by the ratio
to determine the minimum rate Vortex flow meters have a 12:1 turndown ratio at a viscosity of 1 cSt Higher viscosities will
reduce the turndown
N
OTE:
The 1/4 in NPT and 1/2 in flare end meters have a standard turndown ratio of 8:1
Piping Requirements
Turbulence in the pipeline can affect the accuracy of flow meters Typical sources of turbulence are pumps, valves, change
in pipe diameter or changes-in-direction in the line Install the meter away from the turbulence source to avoid turbulence
issues These distances are indicated in Pipe Diameters (PD) For example, 10 PD is ten times the inside pipe diameter away
from the source of turbulence Follow upstream and downstream distances for all sources of turbulence See
7,
Figure 3 on page
8,
Figure 4 on page 9
N
OTE:
Pulsating flow affects accuracy Pressure pulses affect accuracy
Page 6
and
Figure 5 on page 9
for proper piping distance requirements
VRX-UM-00371-EN-04
Figure 2 on page
May 2022
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