ADS FlowShark HV Operation and Maintenance Manual QR 775005 A2 July 2010

ADS FlowShark HV O&M Manual  11 
 Flow Depth  Flow levels must exist  at a depth of at least 2 to 3 inches (51 to 
76 mm)  above the bottom center of the pipe or channel  to successfully obtain 
velocity measurements . 
 Channel Wall/Water Surface  Do not measur e velocity within 1.5 inches 
(38 mm) of the channel wall or flow surface.   

ADS FlowShark HV O&M Manual  13 
 Setup and Operation  
Properly setting up and operati ng the FlowShark HV are critical to obtaining the most 
accurate and  reliable velocity measurements .  Developing a basic understanding of t he 
control unit keyboard and display before taking measurements  is also essential  to 
accessing and interpreting the results correctly.  Th ese combined skills and knowledge 
are fundamental  to performing measurement activit ies effectively and effici ently. 
This section...

14 ADS FlowShark HV O&M Manual  
Connecting the Sensor to the Control Unit  
Connect the sensor to the control unit  by removing the protective cap from the 
corresponding por t on the unit and then inserting and screw ing in the connector  from 
the sensor cable in to the port . 
When measurement  is complete, unscrew and remove the sensor connector from the 
control unit and replace the protective cap onto the port . 
Operating the Flow Shark  HV  
Turn on the FlowShark HV  by pressing and holding down...

ADS FlowShark HV O&M Manual  15 
Modifying the Parameter Settings 
The lower leve l screens provide access to parameter settings that may be modified to 
provide additional information, compensate for flow conditions, suppor t associated 
hardware, and address other relevant issues involved in velocity measurement 
activities.  The default parameters are set for the FlowShark HV at the factory.  Under 
normal conditions, it should not be necessary to access or modify the parameter 
settings on the...

16 ADS FlowShark HV O&M Manual  
Understanding the Keys on the Control Unit  
The following table provides general functional descriptions for the keys on the 
control unit .  Each key serves multiple functions.  The current function of a key  
depends on the current content displayed on the control unit screen. 
Key Functional Description 
ESC  Turns off the 
control unit when held down for more than 2 seconds  
Returns the menu to the previous level 
 Turns on  the  control unit when held down  for at...

ADS FlowShark HV O&M Manual  17 
Note:  If acclimation and stabilization do not occur within 5 minutes, please 
contact an ADS representative for further assist ance. 
The sensor has been calibrated for measuring velocity in water.  However, if velocity 
measurements will be taken in another kind of medium in which the speed of sound 
differs from that of water (4872 f eet per second (1485 mps) at 20°C  (68°F)), contact 
ADS for assistance in  modifying the calibration factor accordingly when setting the...

18 ADS FlowShark HV O&M Manual  
time period over which the average was calculated  will display until a new running 
average velocity i s initiated or the control unit  display is turned off or goes off 
automatically . 
ADS also recommends an ISO standard that includes s everal other methods for 
calculating average velocity using the individual velocity measurements obtained 
through the FlowShark HV:  
ISO 748: 2007, Hydrometry – Measurement of Liquid Flow in Open Channels Using 
Current -Meters or...

ADS FlowShark HV O&M Manual  19 
 Poor Reflection Quality in Flow   The following  histogram displays a very 
wide range of frequencies with no stable peak , producing a quality rating of 
less than  30%.  The velocity readings displayed are essentially too low , and 
t he  histogram suggests that the low quality rating may be the result of a low 
concentration of reflective particles  that are too small for detection.  Scattering 
or air -injecting r eflective particles , such as sand, into the flow...