Badger Meter Irrigation Sensors - 1/2 and larger" - Manual (Page 4)

Model 228CB
This model consists of a Model 220BR sleeve and hex mounting adapter assembly inserted in a 2 inch or 2-1/2 inch Class 150
cast iron tee and preset to a specific height.
Model 228SS
This model consists of a Model 220SS sleeve and hex mounting adapter assembly inserted in a 2 inch 316 stainless steel tee
and preset to a specific height.
Model 250BR
These models combine a PPS electronics package inserted in a 1/2 inch, 3/4 inch, 1 inch, 1-1/4 inch, and 1-1/2 inch
proprietary cast bronze pipe tee with threaded NPT connections.
MECHANICAL INSTALLATION
General
The accuracy of flow measurement for all flow measuring devices is highly dependent on proper location of the sensor in the
piping system. Irregular flow velocity profiles caused by valves, fittings, pipe bends, etc. can lead to inaccurate overall flow
rate indications even though local flow velocity measurement may be accurate. A sensor located in the pipe where it can be
affected by air bubbles, floating debris, or sediment may not achieve full accuracy and could be damaged. Badger Meter flow
sensors are designed to operate reliably under adverse conditions, but the following recommendations should be followed to
ensure maximum system accuracy:
1. Choose a location along the pipe where 10 pipe diameters upstream and 5 pipe diameters downstream of the sensor
provide no flow disturbance. Pipe bends, valves, other fittings, pipe enlargements and reductions should not be
present in this length of pipe.
2. The preferred location for the sensor around the circumference of a horizontal pipe is on top. If trapped air or debris
will interfere, the sensor should be located further around the pipe from the top but not more than 45 degrees
from top dead center. The sensor should never be located at the bottom of the pipe, as sediment may collect there.
Locations off top dead center cause the impeller friction to increase, which may affect performance at low flow rates.
Any circumferential location is correct for installation in vertical pipes. Rising flow preferred to reduce effects of any
trapped air.
Mechanical Installation for 228BR, 228CB and 228SS
These tee-type sensors have a factory set insertion depth and alignment.
Do not disturb the position of the thread hex adapter or the lower two nuts on the threaded rods of the hex adapter. This
could lead to inaccurate calibration and faulty reading of the flow rate.
Remove the sleeve assembly by removing the top 7/16 inch nuts only. Pull the sleeve assembly straight out of the mounting
adaptor.
250 and 228 Metal Tee Impeller Flow Sensors
Page 4 August 2012