Region of measurement boundary or sensitivity (plan view)
Figure 1-3:
A
B
C
STATUS
SCROLL
SELECT
A.
Long axis
B.
Short axis
C.
Sensitive, or effective, region
The factory calibration compensates for the boundary effect. The meter can be calibrated
for 2-inch, 2.5-inch, or 3-inch pipe. If the meter is installed in a pipe that does not match
the calibration size, the compensation will be inaccurate, and process measurement will
be inaccurate.
Verify that the meter was calibrated for the pipe size you plan to use.
1.4.2
Flow rates
Maintain constant flow rates and velocities that are within the limits specified for the
meter. The fluid flow provides a steady heat flow into the meter installation, and the flow
rate influences the self-cleaning of the meter tines, the dissipation of bubbles, and the
solid contaminants around the meter.
If you install the meter in a bypass configuration (such as in a flow-through chamber), use a
pressure drop, pitot scoop, or a sample pump to maintain flow. When using a sample
pump, place the pump upstream from the meter.
Planning
Installation Manual
5
