OTT Flo-Dar Manual Del Usuario página 17

Review the guidelines that follow to find the best location for the sensor.
• Examine the upstream and downstream flow characteristics. Use a
mirror if necessary. Install the sensor above the water where the flow
is stable. Do not install the sensor where there are standing waves,
pools or objects or materials that can disrupt the flow profile.
• If the upstream flow characteristics are acceptable, install the sensor
on the upstream wall of the manhole with the sensor pointing
upstream. This location will make sure that the measured flow is the
same as the flow in the pipe and that the sensor cable points away
from the wall.
• Install the sensor away from the sides of the pipe and in the very
center of the flow where the fluid is at the maximum depth.
• Install the sensor in a location that is accessible for maintenance.
Items to collect:
• Assembled frame and wall mount bracket assembly
• Anchors with nuts and washers
• Tools: mirror, ruler or tape measure, marker
Complete the steps to install the frame on the wall of the manhole above
the flow. Make sure to obey all codes and/or directives that are relevant
to the location. Refer to Site location guidelines
1. Make a mark on the wall that identifies the location of the top of the
sensor frame. Refer to Figure
above and below this mark.
• Sensor without SVS—make sure that when the sensor is in the
frame, the radar beam is not stopped by the wall or channel. Refer
to Figure 13 on page 16.
• Sensor with SVS—the top of the sensor frame must be installed at
an exact distance above the top of the channel. For pipe
diameters that are more than 635 mm (25 in.), measure 127 mm
(5 in.) from the interior crown of the pipe to the top of the frame.
For pipe diameters that are less than 635 mm (25 in.), measure
152.4 mm (6 in.) from the interior crown of the pipe to the top of
the frame.
2. Put the wall mount brackets above and below this mark.
14 English
All manuals and user guides at all-guides.com
on page 9.
11. The wall brackets will be installed
3. Attach the brackets to the wall using the supplied anchors. Install the
anchors into 3/8-in. diameter holes at a depth of 38.1 mm (1.5 in.).
4. Connect the frame to the wall bracket with a spacer. Refer to
Figure 11. It may be necessary to use the 12-inch spacer to position
the sensor farther from the wall when there is a large pipe lip.
Figure 11 Wall installation
1 Distance from interior crown of pipe
to top of frame
2 Anchor
3 Washer
4 Nut