Discharge - Ott ADC

Parameter to be measured:

Flow velocity (, discharge)

Method:

ultrasonic reflectogram cross-correlation

Equipment:

• probe
• display unit
• wading rod

Advantages:

• on-site discharge computation
• powerful quality checking, configuration and data storage options
• integrated depth measurement and sensor positioning indicator
• convenient software with visualisation capabilities
• USB (no serial port required)
• rechargable via USB

Disadvantages:

• heavy rods with coarse scale
• sensor positioning indicator is difficult to read when adjusting sensor height or rod must be held without ground contact
• test device showed signs of rainwater entering the display
• built-in batteries, cannot be changed by user

What to watch out for:

• turbulent flow can cause the device to reject the measurements. Newer versions of the firmware provide (apart form additional quality check features) options to control that - look for new versions on the OTT-website
• back pain (when adjusting depth of the probe free-hanging) - use sliding rod or makeshift additional support for holding the rod
• the wall charger seems to use more than 12 V put on a standard mini-USB plug - rather don't try to charge standard devices with that power supply!

Links

Discharge - comparison of measurements (C2, Flowtracker, Flowsens, ADC, tracer, dipping rod)

Other related web sites:

Projects that used the above equipment: -

References

http://www.ott-hydrometry.de/web/ott_de.nsf/id/pa_adc_e.html