ADS Environmental Services Portable FlowShark Pulse QR 775006 A2 - Manual (Page 125)

6-26 ADS Portable FlowShark Pulse Manual
The remaining options involve combinations of the preceding
options. These may be necessary when structural conditions
prohibit a single sensor from adequately addressing the entire
measurement range at a location.
Sensor Combination 1: Air-Ultrasonic and Pressure
ADS recommends this option for measuring flow at a location that can experience
flows ranging from 0 inches to surcharge conditions. The air-ultrasonic depth sensor
or mini air-ultrasonic depth sensor measures low depths; the pressure sensor measures
full pipe. Pressure sensors may be installed off-center when heavy silt is present.
P
1
Combination: Air-Ultrasonic and Pressure (1 represents
Sensor Combination: Two-Wire Sensor and Pressure
ADS recommends this option for applications similar to the previous combination.
However, the 2-wire sensor would be used in place of the air-ultrasonic depth sensor.
Sensor Combination: Water-Ultrasonic and Pressure
ADS recommends this option for measuring flow at a location that can experience
flows ranging from depths of 5 mm to surcharge conditions. The pressure sensor
measures the lower and highest flows; the water-ultrasonic depth sensor measures the
middle range flows. The water-ultrasonic combination sensor must be installed at the
bottom of the pipe in the center.