ADS Environmental Services Portable FlowShark Pulse QR 775006 A2 - Manual (Page 53)

3-16 ADS Portable FlowShark Pulse Manual
Arranging the sensors in the pipe
For a permanent installation, secure the air-ultrasonic depth sensor to the top of the
pipe with 3 stainless steel screws (M5) or use the pipe mounting plate and attach the
plate with appropriate anchors. To permanently secure the mini air-ultrasonic depth
sensor, use the accompanying mounting shoe. Use screws of an appropriate length to
ensure safety and durability under all operational conditions.
The air-ultrasonic depth sensor has a deadband of 4 inches (10
cm); the mini air-ultrasonic depth sensor has a 1.6-inch (4-cm)
deadband. Depth levels cannot be measured within the deadband.
If the air-ultrasonic depth sensor becomes submerged, the sensor
will send the signal directly into the flow. Since sounds travels
faster in flow than in air, erroneous depth measurements are likely
to occur. Therefore, do not include the deadband in the maximum
depth parameter for the air-ultrasonic depth sensor.
Pipe Insertion Sensor
The pipe insertion sensor is most suitable for applications such as closed pipes that
remain full. Once installed, the inclined side of the velocity sensor must be facing
upstream and the horizontal portion of the sensor must be flush with the pipe wall.
The installation aid must be facing downstream. Use only non-corrosive fastening
hardware to secure the sensor securely and tightly. Screw the pipe sensor tightly into
the 1.5-inch nozzle using a gasket ring and the retaining element.