4230 Flow Meter
Section 3 Installation
3-16
The copper salts released by the tubing are algicidal agents that
tend to inhibit the growth of algae. However, the copper tubing
may not be compatible with the flow stream, so use it with
caution. Attach the copper bubble line extensions to the bubble
line in the same way as the stainless steel extensions.
Figure 3-5 Installing the Stainless Steel Bubble Line Extension
3.5.12 Open Channel
Installation
If you do not use a stilling well, attach the bubble line to the side
of the flow channel or flume. Make the attachment so it causes a
minimum amount of disturbance to the flow stream. If possible,
cut a groove in the side of the channel, place the bubble line in
the groove, and then grout over the groove.
Alternatively, you can attach the bubble line to the side of the
channel, and then grout over the line to form smooth, sloped
lead-in and lead-out surfaces. However, if neither of these
methods is practical, you may simply attach the bubble line to
the side of the channel or the upstream side of a weir using
stainless steel and/or plastic mounting hardware.
In any case, always install the bubble line so it causes as little
disturbance to the flow stream as possible. This usually means
an installation on or adjacent to a channel wall where there is a
condition of stagnant flow. For temporary survey applications,
you can attach the bubble line with waterproof tape or other tem-
porary means.
3.6 Flow Metering Inserts Flow metering inserts are available for use with the 4230 Flow
Meter that you can temporarily install inside round pipe
sewers and flow streams to create a primary device inside the
pipe. These inserts are available to fit 6", 8", 10", and 12" pipes
and install from street level.
Isco does not recommend using these inserts for per-
manent installation due to the likelihood of eventual
clogging. For long-term operation, use of the Bubbler Tube
Retainer Assembly, with an appropriate Isco Mounting Ring, is a
preferable alternative to the Flow Metering Inserts, as there is
Stainless
Stee l
Extension
Silicone
Tube
Te flon Bubble
Line Tubing
TM
Stainless
Stee l
Extension
Vinyl Bubble
Line Tubing
To Next Page
Loading...
