ADS Environmental Services Portable FlowShark Pulse QR 775006 A2 - Manual (Page 22)

C H A P T E R 2
System Overview and Operation
The Portable FlowShark Pulse is a portable monitoring system and data storage
device designed for temporary flow measurement in slightly- to heavily-polluted flow
of various compositions in partially-filled to full pipes of various shapes and
dimensions. The system measures flow velocity by spatial allocation using ultrasonic
pulses. Signal evaluation occurs through cross-correlation using a digital signal
processor. Depth measurement occurs through various sensors via ultrasonic (transit-
time) technology directed from the top (air) or bottom (water) of the pipe, pressure
measurement cell, or mA input (for external depth measurement).
The method for measurement is based on the ultrasonic reflection
principle. Therefore, to ensure the system operates properly, it is
essential that particles, such as dirt, gas bubbles, or similar objects, are
present in the flow for reflecting the ultrasonic signal sent by the sensor.