Greyline Instruments SLT32 - Transducer Positioning for Flumes;Weirs; Parshall Flume Positioning; Palmer Bowlus Flume Positioning; V-Notch Weir Positioning

TYPICALTRANSDUCERPOSITIONING
FORFLUMESANDWEIRS
Alwaysrefertotheflumeorweirmanufacturer'sinstructionsforcorrectmeasurementpointupstream
fromtheflumeorweir.Locationofthesensoriscriticalforaccurateflowmeasurement.
Ifmanufacturer'sinstructionsarenotavailable,thefollowingguidelinesaregenerallyaccepted.
1.PARSHALLFLUME:
Positionthesensorat2/3Approach
asillustratedabove.Sensorheight
mustbe12"/30.5cmormore
abovethehighestwaterlevel.
2.PALMERBOWLUSFLUMES:
Positionthesensorat½theflume
Diameterupstreamfromthethroat
oftheflume.Sensorheightmustbe
12"/30.5cm(dependingonsensor
model)ormoreabovethehighest
waterlevel.
3.V-NOTCHWEIRS
Positionthesensorat3xmaximumHeadupstreamfrom
theweirplate.Sensorheightmustbe12"/30.5cm
(dependingonsensormodel)ormoreabovethehighest
waterlevel.
STILLINGWELLS
Stillingwellsarerecommendedtoreducetheeffectsofturbulenceaswaterflowsthroughtheflumeor
weir.TheSLT32sensoriscenteredoverthestillingwell.Sensorheightmustbe12"/30.5cmormore
abovethehighestwaterlevel.Thewellmustbekeptcleanofsedimentsanddepositsonthesidewalls.
SLT32Level&FlowMonitor
ManualSeriesB.11
Page 22
D
FLOW
SENSOR
POSITION
3x MAX. HEAD
WEIR
PLATE