ADS Environmental Services Portable FlowShark Pulse QR 775006 A2 - Manual (Page 123)

6-24 ADS Portable FlowShark Pulse Manual
This sensor allows you to measure low flow levels (e.g., for detecting infiltration).
It must be installed in the center of the pipe crown (+/- 2°) and parallel to the water
surface.
Sensor type 1: Air-Ultrasonic
Option 2: Water-Ultrasonic
This option involves level (i.e., depth) measurement using the water-ultrasonic
combination sensor and height measurement via water-ultrasonic from the bottom up.
This sensor provides discharge detection in partially-filled pipes.
It must be installed at the bottom of the pipe in the center (+/- 2°).
Do not use the water-ultrasonic combination sensor if the sensor
cannot be installed in the center (e.g., when silt is present or a risk
of sedimentation exists)! This could disrupt the signal and result in
measurement failure. If this condition exists, use a different level
sensor (e.g., an air-ultrasonic depth sensor from top down or
pressure measurement cell).
Sensor type 2: Water-Ultrasonic