4230 Flow Meter
Section 3 Installation
3-12
3.5.7 Installing the Bubble
Line
Install the bubble line at the recommended level measuring point
in the primary device or other open channel flow situation. If you
don't know where this is and you are using a manufactured
primary device, consult the manufacturer.
If you are not using a fabricated device, consult the Isco Open
Channel Flow Measurement Handbook for suggestions. Many
different devices are discussed there. Proper location of the
bubble line outlet is necessary for accurate measurement. Nor-
mally, you place the bubble line in the flow stream so the end is
positioned at a right angle to the flow.
You do not need to locate the outlet of the bubble line precisely at
the “zero” liquid level of the weir or flume. The Parameter to
Adjust program step of the 4230 allows you to locate the outlet
end of the bubble line anywhere within ten feet (3 m) above or
below the actual zero level of the primary device. Then you cali-
brate the displayed level using the Parameter to Adjust step in
the program.
To Next Page
Loading...
