Manual

INSTALLATION INSTRUCTIONS, DOUBLE SUPPORT
1. Follow steps 1 through 7 in "Installation Instructions, Single Support" on page 5. At 180° from and on the same plane
as the previously drilled hole, grind the surface of the pipe to provide a clean area for welding. Drill a hole and deburr,
especially on the inside of the pipe. The hole used for the double support should be sized according to Table 3.
MODEL / SENSOR WELD CONNECTOR DRILL BIT
AR0 (1/2") 1/8" 3/8"
AR (7/8") 1/2" 1/2"
AR1 (1-1/4") 1" 7/8"
Table 3: Double support drill bit size
2. Weld the double support thread-o-let making sure that it is centered with the drilled hole (1/16" weld gap recommended).
3. Install the AR Ellipse sensor through the two holes. Make sure that the double support pin passes through the guide ring.
See Figure 7.
Ellipse Sensor
Double Support Pin
Guide Ring
Figure 7: Double support pin
4. Align the arrow located on the sensor head in the direction of ow as in step 9, "Installation Instructions, Single Support" on
page 5.
5. Ensure that the AR Ellipse is in the correct orientation and spans the inside of the pipe. Tighten the compression nut
manually, then tighten it 1-1/4 turns more using a wrench.
6. Install the plug into the end of the double support thread-o-let. Tighten the plug to prevent leakage.
Ellipse® Pitot Tube Meter, AR Annular Regular Meter
Page 6 April 2014