Seametrics EX100 Operating Manual
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EX100/200 Series
Insertion Magnetic Flow Meter
Instructions
EX11x
EX21x
EX15x
EX25x
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TABLE OF CONTENTS
General Information
General Information ...................................................................................................................................................Page 3
Features ...........................................................................................................................................................................Page 3
Specications ................................................................................................................................................................Page 4
Installation
Positioning the Meter ................................................................................................................................................Page 5
Immersion .......................................................................................................................................................................Page 5
Chemical Injection or Fertigation ..........................................................................................................................Page 5
EX11x/21x Installation ................................................................................................................................................Page 6
EX15x/25x Installation ................................................................................................................................................Page 6
Depth Setting ................................................................................................................................................................Page 7
Pipe Wall Thickness .....................................................................................................................................................Page 8
Straight Pipe Recommendations ...........................................................................................................................Page 9
Full Pipe Recommendations ....................................................................................................................................Page 10
Electrical Connections
General Electrical Guidelines ...................................................................................................................................Page 11
Power ................................................................................................................................................................................Page 11
Output ..............................................................................................................................................................................Page 11
Grounding Guidelines ................................................................................................................................................Page 11
Connection Diagrams
Counter or PLC ..............................................................................................................................................................Page 12
A055 4-20 mA Output ...............................................................................................................................................Page 12
FT520 Controller...........................................................................................................................................................Page 12
FT430/440 Display & Proportional Feed ............................................................................................................Page 13
FT440 & 4-20 mA Output ........................................................................................................................................Page 13
Dual FT430/440 Displays ..........................................................................................................................................Page 13
DL76 Data Logger .......................................................................................................................................................Page 14
FT440/DL76 ....................................................................................................................................................................Page 14
EX100/200 SERIES INSTRUCTIONS
Operation & Maintenance
Zero Adjustment ..........................................................................................................................................................Page 15
Minimum Flow ..............................................................................................................................................................Page 15
Filtering ............................................................................................................................................................................Page 15
Electrode Coating ........................................................................................................................................................Page 15
Calibration (“K-Factor”) .............................................................................................................................................Page 15
Flow Rates in Gallons Per Minute ..........................................................................................................................Page 15
Parts List ..........................................................................................................................................................................Page 16
Troubleshooting
Problems .........................................................................................................................................................................Page 17
Probable Causes ...........................................................................................................................................................Page 17
Things to Try ..................................................................................................................................................................Page 17
Seametrics • 253.872.0284 Page 2 seametrics.com
GENERAL INFORMATION
EX100/200 SERIES INSTRUCTIONS
The EX100/200-Series are adjustable depth insertion
magmeters that t 3” to 48” pipe (up to 72” optional). The
complete lack of moving parts of the EX100/200-Series is
the source of its reliability. Brass and stainless steel models
withstand a variety of temperature, pressure, and chemical
conditions. The EX-Series has no rotor to stop turning in
dirty water and there are no bearings to wear out. 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). Adapters mate with standard
1-1/2” (11x/21x) or 2” (15x/25x) FNPT threaded ttings
such as saddles and weldolets which may be purchased
either locally or from Seametrics.
A rapidly reversing magnetic eld is produced in the lower
housing. As the uid moves through this eld, a voltage is
generated that is measured and translated into a frequency
signal proportional to ow rate. This square wave signal
can be sent directly to a PLC or other control or can be
Features
converted using any of the Seametrics family of indicators
and converters.
A modular system of electronics can be installed directly
on the ow sensor or mounted remotely. The FT430
(externally powered with pulse) and the FT440 (loop
powered), both provide digital rate and total displays, as
well as a programmable pulse; the FT440 also provides a
4-20 mA analog output. The AO55 is a blind analog (4-20
mA) transmitter. Programmable pulse for pump pacing is
available with the PD10.
The “hot-tap” models (EX15x/25x) can be installed or
serviced without shutting down the line by means of
a 2” full-port isolation valve that comes with a nipple
for installation on the pipe tting; a bronze ball valve is
standard, with a 316 stainless steel valve option if needed.
In most circumstances, no special tool is required.
Reverse ow output and immersibility are optional.
EX11x/21x
Housing Screw
(connect one to ground)
Cover or Electronics Module
Powder-Coated Cast
Aluminum Housing
Cable Gland Strain Relief
Compression Nut for easy
adjustment, secure locking
Adapter mates with threaded tting
FNPT 1 1/2” FNPT 2”
3/4” tubing, low insertion force
(Typically no tool required)
Sensor Housing
Electrodes and Cap
Cable Gland Strain Relief
Locking Collar
2” Adapter (removes to
mount hot-tap machine)
Valve Assembly for hottap installation
EX15x/25x
Seametrics • 253.872.0284 Page 3 seametrics.com
GENERAL INFORMATION
EX100/200 SERIES INSTRUCTIONS
Specications*
Pipe Size 3” to 48” (up to 72” optional)
Power Full Power: 12 - 24 Vdc, 250mA Low Power: 12 - 24 Vdc, 40mA average with 250mA peaks
Materials Housing Powder-coated cast aluminum
Tubing/Fitting/Sensor Housing Brass or 316 Stainless Steel
Electrodes Hastelloy
Electrode Cap PVDF
O-Ring (15x/25x only) EPDM
Valve Assembly (15x/25x only) Bronze (stainless optional) with bronze ball valve
Fitting Size Required 11x/21x: 1.5” FNPT 15x/25x: 2” FNPT
Maximum Pressure 200 psi (14 bar)
Temperature Ambient 0˚ to 160˚ F (-17˚ to 72˚ C)
Fluid 32˚ to 200˚ F (0˚ to 93˚ C)
Minimum Conductivity 20 microSiemens/cm
Flow Velocity 0.28 - 20 ft/sec (0.08 - 6.09 m/sec)
Accuracy ± 1% of full scale
Output Square wave pulse, opto-isolated, 500 Hz @ 20 ft/sec
Empty Pipe Detection Software, defaults to zero ow
Cable Standard 18’ (6m), #22 shielded twisted pair, 4-conn. Max. cable run at 24 Vdc = 1000’ (300m); at 12 Vdc =
Regulatory
6 mA max, 30Vdc forward ow standard; reverse ow optional
500’ (150m). For other circumstances, contact the factory.
Mark (full power only)
*Specications subject to change • Please consult our website for current data (seametrics.com).
Seametrics • 253.872.0284 Page 4 seametrics.com
INSTALLATION
EX100/200 SERIES INSTRUCTIONS
Positioning the Meter
For best results, the EX100/200 sensor should be
installed with at least ten diameters of straight pipe
upstream and ve downstream. Certain extreme situations
such as partially-opened valves are particularly difcult and
may require more straight diameters upstream (see page 9
for straight pipe recommendations).
Faster Flow
Causes Meter
Distorted
Flow Prole
To Read High
FLOW
10X 5X
Distorted Flows
Immersion
The 100/200-Series sensors are not designed for underwater
operation. Even occasional immersion can cause damage.
If occasional immersion, such as when a vault oods, then
the -40 option, (immersion) is recommended.
Chemical Injection or Fertigation
When a magmeter is used in a chemical injection application
(including fertigation), the chemical line 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
line downstream of magmeter, or far
enough upstream to allow complete
mixing of uids before the meter.
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
Best
Position
Fair
Unacceptable if pipe
contains sediment
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 200°F.
Orienting the Meter
Seametrics • 253.872.0284 Page 5 seametrics.com
INSTALLATION
EX11x/21x Installation
Fitting Installation. EX11x/21x adapters mate with a 1-1/2” female
NPT pipe thread adapter tting. Any tting that provides the
matching NPT female thread may be used. Installation procedure
compensates for tting height differences. Cut a minimum 1-3/4”
hole in the pipe. If possible, measure the wall thickness and write
it down for use in depth setting. Then install the threaded tting
(saddle, weldolet, etc.) on the pipe.
EX100/200 SERIES INSTRUCTIONS
Compression nut
Meter Installation. Loosen the compression nut so that the adapter
slides freely. Pull the meter fully upward and nger-tighten the
compression nut. Using a thread sealant, install the adapter in the
pipe tting. Do not overtighten. Now loosen the compression nut,
lower the meter to the appropriate depth setting (see diagram and
instructions that follow). Be sure ow is in the direction of the arrow
on the housing. Fully tighten compression nut.
EX15x/25x Installation
‘Hot tap’ EX meters are designed so they can be installed and
serviced without depressurizing the pipe.
Fitting Installation. The EX15x/25x adapters mate with a 2” FNPT
threaded tting for compatibility with the 2” isolation valve. Any
tting that provides matching NPT female thread may be used. The
installation procedure compensates for differences in tting height.
If initial installation is performed on an unpressurized pipe, cut a
minimum 1-3/4” hole in the pipe. If possible, measure the wall
thickness and write it down for use in depth setting. Then install the
threaded tting (saddle, weldolet, etc.) on the pipe.
Adapter mates with
FNPT threads
Compression
nut
Locking collar
2” adapter removes
to mount hot-tap
machine
Full-port 2” ball
valve allows sensor
removal
If it is necessary to do the initial installation under pressure, any
standard hot tap drilling machine with 2” NPT adapter, such as a
Mates with 2”
FNPT threads
Transmate or a Mueller, can be used. Ordinarily, it is not necessary
to use an installation tool, due to the small diameter tube the meter
can be installed by hand at all but the highest pressures.
Meter Installation. Remove the sensor unit from the valve assembly.
Using a thread sealant, install the valve assembly on the pipe tting.
If the initial installation is a pressure (“hot”) tap, remove the 1-1/2”
x 2” adapter bushing at the back of the valve. Thread the tapping
machine on, open the valve, and tap using a minimum of 1-3/4” or
maximum 1-7/8” cutter. After retracting the machine and closing
the valve, reinstall the ow sensor. When the sensor is secure, open
the valve and adjust depth setting (see diagram and instructions that
EX15x/25x Sensor
Removal
follow). Be sure ow is in the direction of the arrow on the housing.
Fully tighten locking collar and compression nut.
Seametrics • 253.872.0284 Page 6 seametrics.com
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