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Fitting Installation. Stainless steel and brass fittings
have female pipe threads, requiring the appropriate male
threaded fittings. Saddle fittings require a hole to be cut
in the pipe (recommended hole size is 1-3/4”). Before
cutting into the pipe, observe the drawing below to choose
your meter orientation.
PVC Fittings. A PVC fitting is usually installed by sol-
vent welding. PVC tees are supplied with some upstream
straight pipe, less than the recommended straight pipe
requirements. It is not advisable to connect directly to the
end of these fittings with a flow disturbing device (valve,
elbow), but rather add straight pipe to the end of these
fittings to meet the straight pipe requirements for your
application.
Meter Installation. After the meter fitting is installed
in the pipeline, the meter can be installed in the fitting.
Press the meter into the fitting as far as it will go. Retain
the meter in place by inserting the u-pin. The pin can be
installed from either side. It may be necessary to rotate
the probe back and forth slightly to start the pin into the
slots on the probe. Slide the pin in as far as it will go.
Insertion Depth. The IP80-Series are fixed-depth meters
that must be used with matched fittings appropriate to the
application and pipe size. This ensures that the flow sen-
sor is installed at the correct insertion depth to measure
the average flow velocity of the stream.
K-Factor. Each flow sensor/tee fitting pair is wet calibrated
at the factory and marked with the correct K-factor. Saddle
fittings cannot be factory-calibrated at the proper insertion
depth because the fitting must first be installed on the
pipe in the field; therefore, K-factors for saddle fittings are
derived through testing with standard pipe schedules and
included with the meter. In PVC, however, it is possible to
order a saddle pre-installed on a standard length of pipe,
and the fitting can be wet-calibrated in this case.
Straight Pipe. Straight pipe of at least 10 diameters up-
stream and five diameters downstream of the meter is
strongly recommended for proper accuracy. This is neces-
sary because the shape of the velocity profile changes
as the rate increases around an elbow; placing the meter
too near the elbow causes a distorted reading. Additional
straight run may be needed under specific adverse circum-
stances (see next page).
If you can’t provide enough straight run to smooth out
the velocity profile, some decrease in accuracy may result.
This does not mean the meter’s reading is meaningless,
however. In some applications (e.g., control system, valve
operation) a repeatable reading may be more important
than a highly accurate one.
INSTALLATION
Caution: Never remove the u-clip retainer
when the pipe is under pressure. Always
remove pressure from the pipe before you
attempt to remove the meter. Removal under pres-
sure may result in damage or serious injury.
5X
Diameter Minimum
(See Below)
DISTORTED FLOWS
Distorted
Flow Profile
Faster Flow
Causes Meter
To Read High
FLOW
10X
Diameter Minimum
(See Below)
BEST
Okay, if no air in pipe
Okay, if no sediment in pipe.
POSITIONING THE METER
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