Xylem EX80 User Manual
EX80-Series
ISO
ELECTROMAGNETIC FLOW SENSOR
INSTRUCTIONS
EX80- SERIES ELECTROMAGNETIC FLOW SENSOR INSTRUCTIONS
9 001:2008
CERTIFIED COMPANY
EX81
EX82
EX83
TABLE OF CONTENTS
General Information
Features, Specications .......................................................................................................................................Page 1
Installation
Distorted Flows, Fitting Installation, Chemical Injection or Fertigation, Meter Installation,
Positioning the Meter ............................................................................................................................................Page 2
Straight Pipe Recommendations .........................................................................................................................
Full Pipe Recommendations .................................................................................................................................Page 4
Electrical Connections
General Electrical Guidelines, Power, Forward Flow Output, Reverse Flow Output,
Grounding Guidelines, Grounding Diagram.........................................................................................................Page 5
Connections Diagrams
Counter or PLC, A055 4-20 mA Output, FT520 Controller .................................................................................Page 6
FT420 Display and Proportional Feed, FT420 & 4-20 mA Output,
Dual FT420 Displays (example of bidirectional connection)..............................................................................Page 7
DL76, FT420/DL76 ...............................................................................................................................................Page 8
Operation & Maintenance
Zero Adjustment, Minimum Flow, Flow Rate Table, Presence of Flow Indication,
Filtering, Electrode Coating, Calibration (“K-Factor”), K-Factor Chart ...............................................................Page 9
Page 3
Caution & Troubleshooting
Problems, Probable Causes .................................................................................................................................Back
TABLES AND DIAGRAMS
Features .................................................................................................................................................................Page 1
Specications ........................................................................................................................................................Page 1
Distorted Flows, Positioning the Meter ................................................................................................................Page 2
Straight Pipe Recommendations .........................................................................................................................
Full Pipe Recommendations .................................................................................................................................Page 4
Grounding Diagram ...............................................................................................................................................Page 5
Counter or PLC, A055 4-20 mA Output, FT520 Controller .................................................................................Page 6
FT420 Display and Proportional Feed, FT420 & 4-20 mA Output,
Dual FT420 Displays (example of bidirectional connections) ............................................................................Page 7
Page 3
DL76, FT420/DL76 ...............................................................................................................................................Page 8
Flow Rate Table, K-Factor Chart ...........................................................................................................................Page 9
Troubleshooting .....................................................................................................................................................Back
GENERAL INFORMATION
EX80-Series insertion electromagnetic owmeters are designed
for use with conductive liquids in 1 to 12” pipe. A choice of
materials (stainless steel, brass, and PVC) allows the meter
to adapt to a range of temperature, pressure, and corrosive
environments.
The EX80 is highly suitable for difcult applications with changing
viscosities and pulsating ows, such as air-driven diaphragm
pumps. With no moving parts, these meters can be used in
“dirty” applications where debris would foul a mechanical
meter. Like all magmeters, when used in chemical injection
applications, these meters should be installed upstream of the
chemical line (or far enough downstream to allow complete
mixing of uids before the meter).
Designed for modularity and versatility, the EX80-Series has
a current-sinking pulse output that can be combined with the
appropriate transmitter or indicator for the application. For
FEATURES
Cover, or transmitter or indicator module
Powder coated aluminum housing
Cable strain relief
analog output and display of rate and total, an FT420 can be
used. Blind analog output is provided by the AO55. The PD10
can be used to divide the pulse for pacing chemical metering
pumps and the DL76 (data logger) is also compatible. Modules
can be wall- or meter- mounted. If the EX80 meter is used with
a programmable controller, the output signal can be fed direct,
with no other conditioning required.
EX80-Series fixed depth insertion meters require special
ttings. Factory installation in the tting ensures correct depth
placement in the pipe. The EX80-Series meter can be ordered
in a full power model when a source of electricity is available,
or in a low power model that can run on an external battery
with solar panel.
Reverse ow output and immersibility are optional.
O-ring, EPDM (Viton optional)
Sensor body (Stainless, Brass, PVC)
PVDF electrode cap
SPECIFICATIONS*
Pipe Size
Materials Mechanical
Electrodes
Housing
Electrode Cap
O-Ring
Power Full Power
Low Power
Flow Rate
Temperature Ambient Temp
Fluid Temp : Brass/SS
Fluid Temp: PVC
Pressure Brass/SS
PVC
Minimum Conductivity
Calibration Accuracy
Output
Empty Pipe Detection
*Specications subject to change • Please consult our website for current data (www.seametrics.com).
1” to 12”
316 SS/Brass/PVC
Hastelloy
Cast powder-coated aluminum
PVDF (Kynar)
EPDM standard (Viton optional)
12 - 25 Vdc, 250 mA
12 - 25 Vdc, 40 mA average with 250 mA peaks
0.28 - 20 ft/sec (0.08 - 6.09 m/sec)
0˚ to 160˚ F (-17˚ to 72˚ C)
32˚ to 200˚ F (0˚ to 93˚ C)
32˚ to 130˚ F (0˚ to 55˚ C) @ 0 psi
200 psi (13.8 bar)
150 psi (10 bar) @ 75˚ F
20 microSiemens/cm
+/- 1% of full scale
Square wave pulse, opto isolated, 550 Hz @ 20 ft/sec
Software, defaults to zero ow
Hastelloy electrodes
Page 1
INSTALLATION
DISTORTED FLOWS
Faster Flow
Distorted
Flow Prole
Fitting Installation. EX80-Series meters require special ttings that ensure that the ow sensor is installed to the correct
depth. The tting must be installed in the pipeline before the
meter can be installed. For best results, install with at least
ten diameters of straight pipe upstream of the meter and
ve diameters downstream (or more under specic adverse
circumstances). See diagrams, next page.
Causes Meter
To Read High
10X
5X
Caution: In chemical injection or fertiga-
tion applications, install chemical injection
point downstream of magmeter, or far
enough upstream to allow complete mixing of uids before the meter.
Meter Installation. After the meter tting is installed in the
pipeline, the meter can be installed in the tting. After noting
the direction of the ow arrow, press the meter into the tting
as far as it will go. Retain the meter in place by inserting the
U-clip. 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.
Caution: These ow sensors are not recom-
mended for installation downstream of a
boiler feedwater pump where installation
fault may expose the ow sensor to boiler
pressure and temperature. Maximum recommended
temperature is 130°F (Plastic), 200°F (Metal).
If there is not enough straight run to smooth out the turbulence caused by valves, ttings, and changes in direction,
some decrease in accuracy may result. This does not mean
that the ow meter’s reading is meaningless, however. In
some applications (control systems, valve operation, chemical addition), a repeatable reading may be more important
than a highly accurate one.
Although EX80-Series PVC meter tees are supplied with some
straight pipe, additional straight pipe should be added to
meet straight pipe recommendations. It is not advisable to
connect a ow-disturbing device (e.g. valve or elbow) directly
to the end of these ttings.
A PVC tting is usually installed by solvent welding. The stainless steel and brass meter ttings have female pipe threads,
requiring the appropriate male threaded ttings. Saddleor
weld ttings (3” and above) require a hole to be cut in the
pipe. Recommended hole size is 1-3/4”.
Chemical Injection or Fertigation. When any magmeter, by
any manufacturer, is used in a chemical injection application
(including fertigation), the chemical injection point must be
placed downstream of the magmeter OR far enough upstream
for complete mixing to occur before the uid reaches the
meter. When unmixed chemical or fertilizer alternates with
water passing through the meter, the rapid changes in conductivity may cause sudden spikes and drops in the meter’s
reading, resulting in inaccurate measurement. The magmeter
will restabilize, however, with a steady ow of uid of uniform
conductivity.
POSITIONING THE METER
Okay position if there is no
air in the pipe
BEST POSITIONS
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
pressure may result in damage or serious injury.
Page 2
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