Flomec QS200 Product Owners Manual page 10

INSTALLATION (Continued)
QS200 ultrasonic sensors should be installed in a ground box with straight runs of pipe equal
to 10 pipe diameters upstream, and 5 times the pipe diameter downstream to prevent
turbulence that can decrease the sensor's accuracy. Without these straight runs, QS200
sensors will still detect higher and lower than expected flows and unscheduled flows. The
arrow embossed on the insert body denotes the flow direction.
Figure 3
Install Meter onto Pipe
NOTE: There is no need to remove the insert to install the meter. The meter must be installed
with the arrow on the insert pointing in the flow direction.
If the meter is accidentally installed backwards, simply remove the insert, rotate 180 degrees
so the arrow points in the flow direction, and reinstall the insert.
The Tee is bi-directional; the insert is not. The insert operates correctly as long as the insert
arrow is pointed in the direction of flow. The insert can be rotated 180 degrees, so its arrow
can always be pointed in the direction of flow regardless of Tee installation.
If space allows, install Tee/insert at a 60° to 90° angle from vertical (see Figure 3).
NOTE: For 1-inch pipe installations, this 60° to 90° angle is especially important for the most
accurate meter operation.
Note: Flow must go uphill through the meter, never downhill through the meter to avoid air
bubbles or air pockets captured in the Tee.
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