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3-1
730 Bubbler Module
Section 3 Installation Methods
The bubble line may be installed in many different channel
types, which are summarized here. For more detailed infor-
mation about mounting options, consult your Isco Mounting
Rings Installation and Operation Guide. See Figure 3-4 for
examples of the mounting methods described in this section.
3.1 Installation in Round
Pipes
Teledyne Isco offers four systems for installing bubble line in
round pipes:
• Flow Metering Inserts
• Isco Spring Rings
(for pipe diameters of 15 inches or less)
• Scissors Rings
(for pipe diameters from 16 to 80 inches)
• Street Level Installation System
3.1.1 Flow Metering Inserts Flow metering inserts are available for use with the module 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.
The inserts create a restriction in the flow stream and may cause
clogging. Where this could be a problem, we suggest using one of
the other three installation systems instead.
Because the flow metering inserts are installed from street level,
it is not possible to measure the level. Instead, you must set the
level to zero before installing the flow metering insert in the pipe.
Set the level to zero using the following instructions:
1. Install the module in the Sampler and remove the red
cap from the desiccant cartridge.
2. Assemble the flow metering insert to the length that will
be installed.
3. Attach the bubble line to the module. The inside of the
bubble line must be dry and unobstructed.
4. Turn on the sampler and wait 2 to 3 minutes to allow the
bubbler’s air system to stabilize.
5. Select Program from the sampler’s main menu and step
through the screens until the “Current Level” screen
appears. (Detailed programming instructions appear in the
sampler manual.)
6. Adjust the level to read zero (0.00 feet or meters).