10 ADS FlowShark HV O&M Manual
Operational and Environmental Conditions
The technical specifications of the FlowShark HV and the flow and hydraulic
conditions at the measurement location determine the operational success and/or
performance level of the FlowShark HV. Therefore, consider the following
limitations in the hardware and conditions at the location when investigating a
prospective location for performing measurement activities:
Operating Temperature Do not measure velocity at locations exhibiting
temperatures outside the operating tempe rature range of the sensor.
Relative Humidity The sensor cannot properly measure velocity levels in
the context of relative humidity levels lower than 90% ( absence of
Electromagnetic I nterference The intensity of electromagnetic
interference at the site must not violate the CE guideli nes.
Range The sensor cannot measure velocity outside the measurement range
or window designated for the sensor.
Durability The control unit, sensor, and cable contain delicate mechanisms
and electronics. Therefore, handle them with extreme care and avo id stepping
or placing heavy objects on the cable or contacting it with a sharp object. In
addition, t he equipment, while durable, is subject to wear, particularly in a
harsh measurement environment. Therefore, conduct routine maintenance on
all components according to the instructions included in the Maintenance
section on page 21. C ontact ADS for further information concerning the
durability and limitations of the equipment.
Flow /Hydraulic Limitations
Particulate Size and Reflectivity Measuring velocity using t he Doppler
ultrasonic effect involves reflecting emitted signals off particles in the flow .
Smooth, c lear flow does not provide objects for reflection and, therefore, is
not the appropriate environment for Doppler measurement . Particles in the
flow, such as air bubbles and solid particles, must be larger than 0.02 inches
( 0.5 m m) in diameter and occur in a volume greater th an 100 parts per million
for relevant and accurate sensor measurement .
Turbulent/ Inconsistent Flow Abnormal or non-uniform flow conditions,
such as turbulence, currents , or reverse flows, adversely affect velocity
measurement . Therefore, do not measure velocity at a location in a pipe or
channel that is in close proximity to these flow conditions.