DOF6000 serial area velocity flow meter can monitor flow in any shapes of open channel, not full sewer or wastewater pipes without flume or weir. It is ideal for storm water, municipal water treatment and monitor, effluent, raw sewage, irrigation, running water, treated sewage water, etc .
A suitable site has the following features:
1. Flows are laminar and the velocity measured by the transducer can be related to the mean velocity of the channel.
Velocity is measured from a limited path in front of and above the acoustic sensors. This area varies with the amount of suspended material in the water and the channel characteristics. The user has to determine the relationship between the measured and mean velocity.
2. The channel cross section is stable
The relationship between water level and the cross-sectional area is used as part of the flow computation
3. Velocities are greater than 20 mm / second
The transducer does not process velocities slower than this. The maximum velocity is 5 metres / second. The transducer will measure velocities in both directions
4. Reflectors are present in the water.
Generally the more material in the water the better. Ultraflow QSD 6537 generally works well in clean natural streams but problems may be encountered in extremely clean water.
5. No excessive aeration.
Bubbles are good scatterers and occasional small bubbles will enhance the signal. However the speed of sound can be affected if there are excessive amounts of air entrapped in the flow.
6. The bed is stable and Ultraflow QSD 6537 will not be buried by deposits.
Some coating and partial burying has little effect on the measured velocity but it should be avoided. Any burying or sediment covering the depth transducer will affect the depth reading results
7. Ultraflow QSD 6537 Pointing Upstream or Downstream?
Pointing the sensor end downstream will stop it accumulating debris; however in some channels the sensor body may disturb the velocity distribution unacceptably. The velocity reading will be positive when pointing upstream and negative when pointing downstream. The Ultraflow QSD6537 may be configured to only read positive velocities regardless of water flow direction.
8. Ultraflow QSD 6537 Depth sensor not situated parallel to the surface?
If Depth sensor is not parallel to the surface (~±10 °) the readings could be compromised
9. Corrugated Pipes
In general the Ultraflow QSD 6537 is not suited to installation in corrugated pipes
Post time: Nov-11-2022