Hach AV9000S User Manual

Also see for AV9000: User manual

Contents

Hach AV9000S User Manual Manual pdf 13 page image

Figure 7 Sensor positions1 Upstream, facing flow 2 Downstream, facing flow 3 Downstream, reversedTable 1 Selecting probe directionOption DescriptionUpstream Recommended for most applications. The flow stream over the sensor should be as straightas possible with no drops or turns near the measurement point.Mount the sensor in the pipe with the beveled edge pointed toward the flow where the flowstream enters the measurement area.Downstream Use this option when the sensor is installed downstream of the measurement point (wherethe flow stream exits the site). This option is useful when more than one flow stream enters asite and the combined flow of all streams is measured at a single exit point. This option canalso be used if there are hydraulics preventing the sensor from being mounted in upstreamarea.Mount the sensor facing the flow.Downstream(reversed sensor)Use this option when Option B will not work due to poor flow uniformity in the vault. Themaximum velocity read in this kind of installation is 5 fps when the AV9000 interface moduleis not used. Mount the sensor in the downstream direction. The manufacturer recommendsverifying the velocity by profiling flow and using a velocity site multiplier, if required, for moreaccurate reading.Note: When the AV9000 interface module and submerged AV sensor are used with the FL900 logger, theuser has the option to select Reversed Sensor on the Sensor Port Set Up menu.English 13