Dwyer IEFS User Manual
Series IEFS
INSERTION MAGNETIC
FLOW METER INSTRUCTIONS
F-IEFS
IEFS-1XX
IEFS-0XX
TABLE OF CONTENTS
GENERAL INFORMATION, FEATURES and SPECIFICATIONS
General Information
General Information, Features, Specications .................................................................................................Page 1
Installation
Piping, Distorted Flows, Immersion, Positioning the Meter ............................................................................Page 2
Fitting Installation, Meter Installation ............................................................................................................... Page 3
Proper Depth Setting ......................................................................................................................................... Page 4
Dimension “C”, Pipe Wall Thickness ................................................................................................................. Page 5
Straight Pipe Recommendations ...................................................................................................................... Page 6
Full Pipe Recommendations ..............................................................................................................................Page 7
Electrical Connections
General Electrical Guidelines, Power, Forward (and Reverse) Flow Output,
Grounding Guidelines, Grounding Diagram......................................................................................................Page 8
Connections Diagrams
Counter or PLC, Series BAT 4 to 20 mA Output................................................................................................................
Page 9
RTI Display and Proportional Feed, RTI & 4 to 20 mA Output, Dual RTI Displays ......................................... Page 10
Operation & Maintenance
Zero Adjustment, Minimum Flow, Presence of Flow Indication, Filtering,
Electrode Coating............................................................................................................................................... Page 11
Calibration (“K-Factor”), Flow Rates in Gallons Per Minute ............................................................................ Page 12
The complete lack of moving parts in the Series IEFS insertion ow
sensor is the source of its reliability. Brass and stainless steel models
withstand a variety of temperature, pressure, and chemical conditions.
The IEFS Series has no rotor to stop turning in dirty water and there
are no bearings to wear out.
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 converted using any of the Dwyer Instruments Inc.
family of indicators and converters.
A modular system of electronics can be attached directly to the ow
FEATURES
Cable Strain Relief
Lower Housing
Brass or 316 Stainless Shaft
Compression Nut
Adapter Fitting
1 1/2” Male NPT threads
Sensor Housing
Electrodes and Cap
sensor or remotely mounted. The Dwyer Instruments Inc. Series RTI
provides full indication of rate and total, plus 4 to 20 mA output and
the Series BAT provides blind 4 to 20 mA output.
The adapter tting of the sensor is standard male NPT, and can be
directly threaded into ordinary saddles or threaded weld ttings. The
IEFS-1 includes an isolation valve, allowing hot-tap installation, or
installation and removal under pressure; a bronze ball valve is standard,
with a 316 stainless steel valve option if needed.
Reverse ow output and immersibility are optional.
Housing Screw (connect ground to one)
Cover or Electronics Module
IEFS-0XX
IEFS-1XX
Valve assembly for
hot tap installation
Troubleshooting
Problems, Probable Causes and Things to Try ................................................................................................. Page 13
TABLES, DIAGRAMS & CHARTS
Features .............................................................................................................................................................. Page 1
Distorted Flows, Positioning the Meter ............................................................................................................. Page 2
Meter Installation, Sensor Removal .................................................................................................................. Page 3
Proper Depth Setting ......................................................................................................................................... Page 4
Dimension “C”, Pipe Wall Thickness ................................................................................................................. Page 5
Straight Pipe Recommendations ...................................................................................................................... Page 6
Full Pipe Recommendations ..............................................................................................................................Page 7
Grounding Diagram ............................................................................................................................................ Page 8
Connection Diagrams: Counter or PLC, Series BAT 4 to 20 mA Output .........................................................Page 9
Connection Diagrams: Series RTI Display and Proportional Feed, RTI & 4-20 mA Output,
Dual Series RTI Displays .................................................................................................................................... Page 10
Zero Adjustment, Flow Rates in Gallons Per Minute ........................................................................................ Page 11
IEFS K-factors (in Pulses/Gallon) for various pipe sizes .................................................................................Page 12
Troubleshooting Problems, Probable Causes and Things to Try ..................................................................... Page 13
SPECIFICATIONS*
Pipe Sizes
Materials Shaft/Fitting
Electrodes
Electrode Cap
Housing
Valve Assembly
(IEFS-1 Only)
O-Ring
(IEFS-1 Only)
Power Full Power
Low Power
Flow Range
Fitting Size
Temperature Ambient
Fluid
Pressure
Minimum Conductivity
Calibration Accuracy
Output
Empty Pipe Detection
3” to 48” (up to 60” when ordered with 12” extension option)
316 SS or Brass
Hastelloy®
PVDF
Cast powder-coated aluminum
Bronze (stainless optional) with bronze ball valve
EPDM
12 to 25 VDC, 250 mA
12 to 25 VDC, 40 mA average with 250 mA peaks
0.28 to 20 ft/sec (0.08 - 6.09 m/sec)
IEFS-0XX IEFS-1XX
1-1/2” Male NPT 2” Male NPT
0 to 160˚F (-17 to 72˚C)
32 to 200˚F (0 to 93˚C)
200 psi (13.8 bar)
20 microSiemens/cm
+/- 1% of full-scale
Square wave pulse, opto isolated, 550 Hz @ 20 ft/sec
6 mA max, 30 Vdc forward ow standard; reverse ow optional
Software, defaults to zero ow
*Specications subject to change
Hastelloy® is a trademark of Hanes International, Inc.
Page 1
INSTALLATION
INSTALLATION
Piping. For best results, the IEFS 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 6
for straight pipe recommendations).
DISTORTED FLOWS
Faster Flow
Causes Meter
Distorted
Flow Prole
To Read High
FLOW
10X
5X
POSITIONING THE METER
Fair
(Unacceptable position
if air is present)
Best
Position
Fair
(Unacceptable position if uid
contains sediment)
IEFS-0XX INSTALLATION
Fitting Installation. IEFS-0XX sensors come with a 1-1/2” male 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.
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. Loosen the compression nut, and 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. Tighten
compression nut fully.
IEFS-1 INSTALLATION
Compression nut
Adapter tting
with
standard NPT
threads
Immersion. The IEFS Series sensors are not designed for
underwater operation. Even occasional immersion can
cause damage. If occasional immersion is possible, such
as when a vault oods, then the -IMM option, (immersion)
is recomended.
Chemical Injection or Fertigation. When any magmeter, by
any manufacturer, 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 fertiga-
tion applications, install chemical line
downstream of magmeter, or far enough
upstream to allow complete mixing of
uids before the meter.
Page 2
Vertical ow in upward direction is the preferred installation
orientation, since it improves low-ow performance and avoids
problems with trapped air and sediment. Bottom, top, and
vertical pipe installations are all acceptable if required by
the piping layout.
Caution: These ow sensors are not recommended for installation downstream
of a boiler feedwater pump where instal-
lation fault may expose the ow sensor
to boiler pressure and temperature. Maximum
recommended temperature is 200°F.
‘Hot-tap’ IEFS-1XX meters are designed so they can be installed and
serviced without depressurizing the pipe.
Fitting Installation. The IEFS-1XX sensors have a 2” NPT thread 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.
If it is necessary to do the initial installation under pressure, any standard
hot tap drilling machine with 2” NPT adapter, such as a 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
in exception for applications with higher pipe 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 follow). Be sure ow is
in the direction of the arrow on the housing. Tighten locking collar and
compression nut fully.
Compression nut
Locking collar
2” adapter removes
to mount hot-tap
machine
Full-port 2” ball
valve allows sensor
removal
Standard 2”
NPT threads
IEFS-1XX Sensor
Removal
Page 3
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