Seametrics EX800 Operating Manual
EX800-Series
9 001:2008
ISO
ELECTROMAGNETIC FLOW SENSOR INSTRUCTIONS
EX800 SERIES ELECTROMAGNETIC FLOW SENSOR INSTRUCTIONS
CERTIFIED COMPANY
TABLE OF CONTENTS
EX800 SERIES INSTRUCTIONS
General Information
General Information, Features .............................................................................................................................Page 3
Specications ........................................................................................................................................................Page 4
Installation
Fitting Installation, Meter Installation, Chemical Injection or Fertigation .........................................................Page 5
Straight Pipe Recommendations .........................................................................................................................
Full Pipe Recommendations .................................................................................................................................Page 7
Electrical Connections
General Electrical Guidelines, Power, Output (Forward Flow and Reverse Flow), Grounding Guidelines .......Page 8
Connections Diagrams
Counter or PLC, A055 4-20 mA Output, FT520 Controller .................................................................................Page 9
FT430/440 Display & Proportional Feed, FT440 & 4-20 mA Output, Dual FT430/440 Displays ..................Page 10
DL76 Data Logger, FT440/DL76 ..........................................................................................................................Page 11
Operation & Maintenance
Zero Adjustment, Minimum Flow, Flow Rate Table,
Filtering, Electrode Coating, Calibration (“K-Factor”), K-Factor Chart ...............................................................Page 12
Exploded Parts View, Parts List ............................................................................................................................Page 13
Page 6
roubleshooting
Problems, Probable Causes .................................................................................................................................Page 14
TABLES AND DIAGRAMS
Features .................................................................................................................................................................Page 3
Specications ........................................................................................................................................................Page 4
Distorted Flows, Orienting the Meter ...................................................................................................................Page 5
Straight Pipe Recommendations .........................................................................................................................
Full Pipe Recommendations .................................................................................................................................Page 7
Grounding Diagram ...............................................................................................................................................Page 8
Connection Diagrams: Counter or PLC, A055 4-20 mA Output, FT520 Controller ...........................................Page 9
Connection Diagrams: FT430/440 Display & Proportional Feed, FT440 & 4-20 mA Output,
Dual FT430/440 Displays .............................................................................................................................Page 10
Page 6
Connection Diagrams: DL76 Data Logger, FT440/DL76 ...................................................................................Page 11
Flow Rate Table, K-Factor Chart ...........................................................................................................................Page 12
Exploded Parts View, Parts List ............................................................................................................................Page 13
Troubleshooting .....................................................................................................................................................Page 14
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GENERAL INFORMATION
EX800 SERIES INSTRUCTIONS
EX800-Series insertion electromagnetic ow meters 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 EX800 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 water” 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 EX800-Series has
a current-sinking pulse output that can be combined with the
appropriate transmitter or indicator for the application. For
Features
basic rate/total and pulse output, the FT430 is best. For
analog output and display of rate and total, the FT440 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. Electronic modules can be wall- or meter- mounted.
If the EX800 meter is used with a programmable controller,
the output signal can be fed direct, with no other conditioning
required.
EX800-Series xed depth insertion meters require special
ttings. Factory installation in the tting ensures correct depth
placement in the pipe. The EX800-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.
Cover, or electronics module
Powder-coated aluminum housing
Power cord strain relief
O-ring, EPDM (Viton® optional)
Sensor body (Stainless, Brass, PVC)
PVDF electrode cap
Hastelloy electrodes
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Page 3
GENERAL INFORMATION
Specications*
Pipe Sizes 1” to 12”
Materials Mechanical 316 SS or Brass
Electrodes Hastelloy
Electrode Cap PVDF (Kynar®)
Housing Cast powder-coated aluminum
Valve Assembly (15x/25x only) Bronze (stainless optional) with bronze ball valve
O-Ring (15x/25x only) EPDM standard (Viton® optional)
Power Full Power 12-25 Vdc, 250 mA
Low Power 12-25 Vdc, 40 mA average with 250 mA peaks
Flow Rate 0.28 to 20 ft/sec (0.08 - 6.09 m/sec)
Temperature Ambient 0˚ to 160˚F (-17˚ to 72˚C)
Fluid (Brass/SS) 32˚ to 200˚ F (0˚ to 93˚ C)
Fluid (PVC) 32˚ to 130˚ F (0˚ to 55˚ C) @ 0 psi
EX800 SERIES INSTRUCTIONS
Pressure Brass/SS 200 psi (14 bar)
PVC 150 psi (10 bar) @ 75˚ F (24˚ C)
Minimum Conductivity 20 microSiemens/cm
Calibration Accuracy +/- 1% of full scale
Output Square wave pulse, opto isolated, 500 Hz @ 20 ft/sec
Empty Pipe Detection Software, defaults to zero ow
Regulatory
*Specications subject to change • Please consult our website for current data (www.seametrics.com).
Kynar is a registered trademark of Arkema, Inc., Viton is a registered trademark of DuPont Corporation.
(Standard power only)
Page 4
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INSTALLATION
Fitting Installation
EX800-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.
EX800 SERIES INSTRUCTIONS
Caution: These ow sensors are not
recommended 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.
Faster Flow
Causes Meter
Distorted
To Read High
Flow Prole
10X
Distorted Flows
5X
Although EX800-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.
Saddle or weld ttings (3” and above) require a hole to be cut
in the pipe. Recommended hole size is 1-3/4”.
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.
Horizontal (3 o’clock or 9 o’clock position) is the preferred
installation orientation, since it improves low-ow performance
and avoids problems with trapped air and sediment. (See
Orienting the Meter diagram below.) Bottom (6 o’clock), top
(12 o’clock), and vertical pipe installations are all acceptable if
required by the piping layout.
Fair
Unacceptable if pipe
contains air
Air bubbles
Best
Position
Sediment
Fair
Unacceptable if pipe
contains sediment
Orienting the Meter
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.
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.
Caution: In chemical injection or fertigation
applications, install chemical injection point
downstream of magmeter, or far enough
upstream to allow complete mixing of uids
before the meter.
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