Badger Meter M-Series M4000 - Manual (Page 8)

8
the meter and the injection point must be signifi cant; 50 to
100 feet (15 to 30 meters). When the water/chemical solution
reaches the meter it must be a complete, homogeneous
mixture. If the injection point is too close, the meter senses
two (2) different liquids (conductivity is different for each) and
correct data output cannot be assured. The injection method:
spaced bursts, continuous stream of drips, a liquid or gas
can also affect downstream readings by the meter.
Sometimes it’s diffi cult to specify the exact downstream
placement distances because of the number of variables.
Contact Badger Meter Technical Support, 877-243-1010, to
review your application if necessary.
Partially Filled Pipe Situations
It is possible to encounter situations where the process
pipe is momentarily only partially fi lled. Examples include;
lack of backpressure, insuffi cient line pressure, gravity fl ow
applications, etc.
To eliminate these situations:
WRONG
FLO
W
F
L
O
W
F
L O
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F
L O
W F
L O
W
Do not install the meter in
the highest point of the pipeline
F
L O
W
F
L
O
W
FLO
W
F
L O
W
WRONG
F
L
O
W
Do not install the meter in a vertical,
downward fl ow section of pipe
F
L
O
W
F
L
O
W
F
L O
W FLO
W
F
L O
W
RIGHT
ALWAYS locate ON/OFF valves on the
downstream side of the meter
To minimize the possibility of partially full pipe fl ows in
horizontal, gravity or low pressure applications, create a pipe
arrangement that insures the detector remains full of liquid at
all times
Meter Gaskets and Grounding
Two other considerations to meter location, orientation and
application are gasket and grounding requirements and
placement.
Meter/Pipeline Connection Gaskets
Gasket(s) (not provided) must be installed between the
detector isolating liner and the pipeline fl ange to ensure a
proper and secure hydraulic seal. Use gaskets compatible
with the fl uid fl ow. Center each gasket on the fl ange to avoid
fl ow restrictions or turbulence in the line.
Do not use graphite or any electrically conductive sealing
compound to hold gaskets during installation. Measuring
signal accuracy could be affected.
If a grounding ring is used in the detector/pipeline
connection, place the ring between two gaskets. (See Non-
Conductive Pipe Grounding section.)
Meter Grounding
Process pipeline material can be either electrically
conductive (metal) or not electrically conductive (made of or
lined with PVC, fi berglass or concrete).