Page 1
Series IEFS
INSERTION MAGNETIC
FLOW METER INSTRUCTIONS
F-IEFS
IEFS-1XX
IEFS-0XX
Page 2
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.
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Page 3
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
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Page 4
INSTALLATION
PROPER DEPTH SETTING
Depth Setting. It is important for accuracy that the sensor
be inserted to the correct depth into the pipe.
INSTALLATION
TABLE 1: DIMENSION “C”
Caution! Never attempt to remove a ow
sensor when there is pressure in the pipe
unless it is specically designed for hot
tap installation and removal. Loosen the
compression nut slowly to release any trapped pressure. If uid sprays out when removing the sensor,
stop turning and depressurize the pipe. Failure to
do so could result in the sensor being thrown from
the pipe, resulting in damage or serious injury.
1. In Table 1, nd Dimension C for your sensor model
and pipe size. Subtract wall thickness of your pipe
(Table 2) to nd Dimension D.
2. Measuring from the outside of the pipe to the joint in
the housing, as shown in the diagram, adjust the
sensor to Dimension D and hand-tighten compression
nut.
3. Align the conduit housing with the centerline of the
pipe, as shown. Be sure the arrow on the housing
points in the direction of ow.
strain
relief
FLOW
4. Check Dimension D one more time.
5. Tighten the compression nut fully.
NOMINAL PIPE SIZE
3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24” 30” 36”
IEFS-0SX
IEFS-0LX
IEFS-1SX
IEFS-1LX
TABLE 2: PIPE WALL THICKNESS
PVC/Steel
Sch. 40
PVC/Steel
Sch. 80
Stainless
Steel (10S)
Stainless
Steel (40S)
10.04 9.93 9.69 9.46 9.22 8.99 8.75 8.52 8.28 8.05 7.58 6.87 6.17
15.04 14.93 14.69 14.46 14.22 13.99 13.75 13.52 13.28 13.05 12.58 11.87 11.17
17.04 16.93 16.69 16.46 16.22 15.99 15.75 15.52 15.28 15.05 14.58 13.87 13.17
21.04 20.93 20.69 20.46 20.22 19.99 19.75 19.52 19.28 19.05 18.58 17.87 17.17
NOMINAL PIPE SIZE
3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24” 30” 36”
0.216 0.237 0.280 0.322 0.365 0.406 0.438 0.500 0.562 0.593 0.687
0.300 0.337 0.432 0.500 0.593 0.687 0.750 0.843 0.937 1.031 1.218
0.120 0.120 0.134 0.148 0.165 0.180 0.188 0.188 0.188 0.218 0.250 0.312 0.312
0.216 0.237 0.280 0.322 0.365 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375
Page 4
Copper Tubing
(Type L)
Copper Tubing
(Type K)
Brass Pipe
Duct. Iron
(Class 52)
0.090 0.110 0.140 0.200 0.250 0.280
0.109 0.134 0.192 0.271 0.338 0.405
0.219 0.250 0.250 0.312 0.365 0.375
0.280 0.290 0.310 0.330 0.350 0.370 0.390 0.400 0.410 0.420 0.440 0.470 0.530
Page 5
Page 5
INSTALLATION
INSTALLATION
STRAIGHT PIPE RECOMMENDATIONS
(X = diameter)
Reduced Pipe
Two Elbows In Plane
Two Elbows, Out Of Plane
10X
20X
IEFS
IEFS
5X
FULL PIPE RECOMMENDATIONS
Better InstallationPossible Problem
Ensures full pipe
5X10X
Allows air pockets to form at sensor
Better InstallationPossible Problem
5X
Expanded Pipe
Spiral Flow
Swirling Flow
Propeller Meter
20X
50X
IEFS
IEFS
30X
5X
IEFS
Post-valve cavitation can create air pocket Keeps pipe full at sensor
Better InstallationPossible Problem
Air can be trapped
Allows air to bleed off
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.
Page 6
Partially Open
Buttery Valve
IEFS
Page 7
Page 6
ELECTRICAL CONNECTIONS
CONNECTIONS DIAGRAMS
General Electrical Guidelines:
• Whenever possible, avoid running control cables in
the same conduit with or bundled with AC power.
• Using shielded cable, be sure to connect shield to
ground at power supply end of the cable. Do not
connect other end of shield.
• Avoid routing ow sensor cables in close proximity to
a variable frequency drive.
• Recommended power and output wiring is shielded
twisted pair 18 to 22 AWG control cable.
• Recommended voltage is 12 to 24 VDC. Note that
unregulated power supplies can vary from nameplate
voltage by a considerable amount, especially with AC
line voltage uctuation. Therefore 24V power supplies
must be regulated.
See the Connections diagrams on the following pages for the
appropriate terminals.
Grounding Guidelines:
For best results, use a good quality earth ground, such as
metallic water piping or a driven ground, to ensure a good
connection to earth ground and good noise suppression.
For Metallic Pipe: For optimum connection, clamp wire to the
piping a short distance to one side of the ow sensor using an
electrical grounding clamp. Connect the wire to the earth ground
and to one of the housing screws, as shown in “Grounding
Diagram” below.
For Non-Metallic Pipe: Connect a wire from the housing screws
to a good earth ground, such as metalic water piping or a rod
driven into the ground.
Series IEFS & EFS2 meters are usually unaffected by moderate
levels of electrical noise. In some applications performance
may be improved by taking the following steps:
• Use shielded twisted pair cable (Belden 8723 or
equivalent above ground or Alpha 35482 or
equivalent burial).
COUNTER OR PLC
Forward Output
(open collector)
Reverse Output
( -RFO only)
*See Dual RTI Diagram for an
example of bidirectional connections.
BAT 4 to 20 mA OUTPUT
24 VDC Power
SERIES IEFS
Power
Power
SERIES IEFS
12 to 24 VDC
Max. 6 mA, 30 VDC
Max. 6 mA 30 VDC
FREQUENCY
Sensor
COUNTER OR PLC DIGITAL
INPUT
24 VDC Power
Power: A 12 to 24 Vdc power supply capable of at least 250
mA current output is needed.
Output: The standard output is pulses with ow in the forward
direction (Reverse ow output is optional (-RFO ). Electrically
it is an open collector opto isolated switch. The output is not
internally powered.
Note: This output is limited to 6 mA at 30 Vdc maximum.
• Clamp a ferrite bead (Steward 28A2029-OAO or
equivalent) on meter signal/power wire within 3/4”
of the meter strain relief (tape or tie wrap in place if
necessary). See diagram below.
• IMPORTANT - Connect the cable shield ground
wire to ground, ONLY at power supply end of cable.
GROUNDING DIAGRAM
PLACE FERRITE BEAD HERE
Earth
Ground
Housing Screw
Forward Output
Reverse Output
(-RFO only)
+
–
*See Dual RTI Diagram for an
example of bidirectional connections.
4 to 20 mA
4 to 20 mA
SERIES BAT
Page 8
Metallic Pipe
Grounding Clamp
Page 9
Page 7
CONNECTIONS DIAGRAMS
OPERATION & MAINTENANCE
SERIES RTI DISPLAY AND PROPORTIONAL FEED
24 VDC Power
Power
Forward Output
Reverse Output
(-RFO only)
SERIES IEFS
*See Dual RTI Diagram for an
example of bidirectional connections.
SERIES RTI DISPLAY AND 4 to 20 mA OUTPUT
Power
Forward Output
24 VDC
Power
Sensor
Input
Power
4 to 20mA
Sensor
Input
SERIES RTI
Pulse
Scaled
Pulse
Pass-Thru
SERIES RTI
Pulse
Scaled
To
Proportional
Feed
Metering
Pump
Zero Adjustment. When the Series IEFS meter is powered up
and there is no ow, there should be no output pulses (or, if
connected to the RTI, ow rate should read “0”). If there are
pulses, it may be necessary to adjust the ow meter under noow conditions after it has been installed. This should only be
done if the indicated ow is low, near the lower cuto.
Status
LED
Zero
Adjust
Pins
To perform the adjustment, after determining that there is a
full pipe with no ow, short between the two pins marked “Zero
Adjust”. A red LED light will come on for approximately 50
seconds and then go out. The zero adjustment is completed.
Minimum Flow. As with any other ow sensor, there is a
rate below which the IEFS Series sensor cannot read. Check
the table below for the minimum ow rate detectable by the
sensor for a given pipe size.
Presence of Flow Indication. To assist in troubleshooting, the
“Status LED” has two blinking modes in normal operation.
When there is no flow detectable by the meter (below
minimum threshold), the LED blinks every 8.0 seconds. When
there is detectable ow, the same indicator blinks every 3.0
seconds (Pulses are being output when indicator is blinking
every 3 seconds).
Filtering. The software of the IEFS Series lters out electrical
noise and averages sudden variations in the ow to smooth
the output. It takes a matter of seconds for the ow sensor to
get up to full output when it is powered up or when ow begins.
Electrode Coating. Grease or other adhering, non-conductive
materials can stop ow detection if the electrodes become
heavily coated. To clean the electrodes, remove the sensor
from the pipe and gently scrub the electrodes (three silver
bumps) on the reading face of the ow sensor. A mild soap
(dishwashing liquid for example) can be used to aid the
cleaning process.
Reverse Output
(-RFO only)
SERIES IEFS
*See Dual RTI Diagram for an
example of bidirectional connections.
DUAL SERIES RTI DISPLAYS
(Example of Bidirectional Connection)
SERIES RTI
Power 4 to 20mA
Pulse
Pass-Thru
Pulse
Scaled
Sensor
Input
Page 10
24 VD-
CPower
4 to 20 mA Device
(e.g. pump, PLC)
Power
Forward Output
Reverse Output
(-RFO only)
IEFS SERIES
24 VC
Power
Power
4 to 20mA
Sensor
Input
Power 4 to 20mA
Pulse
Pass-Thru
SERIES RTI
Pulse
Scaled
Pulse
Pass-Thru
FLOW RATES IN GALLONS PER MINUTE
Feet Per
Second
Min 0.28
Max 20.0
NOMINAL PIPE SIZE
3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24” 30” 36” 48”
6 11 25 44 69 99 134 175 222 274 395 617 888 1580
440 783 1,762 3,133 4,895 7,050 9,596 12,533 15,863 19,584 28,200 44,064 63,452 112,804
Page 11
Page 8
OPERATION & MAINTENANCE
TROUBLESHOOTING
Calibration (“K-Factor”). In order to properly process pulses
from the ow sensor, a number must be entered into the
control to which the sensor is connected. This number, called
the K-factor, is the number of pulses the sensor puts out per
unit of uid passing through the pipe. It is normally provided
for Dwyer Instruments Inc. sensors in pulses per gallon, and
IEFS K-factors (in Pulses/Gallon) for various pipe sizes
Nominal Pipe Size
3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24” 30” 36”
PVC/Steel
Sch. 40
PVC/Steel
Sch. 40
Stainless Steel
(10S)
Stainless Steel
(40S)
Copper Tubing
(Type K)
Copper Tubing
(Type L)
Brass Pipe
Duct Iron
(Class 52)
70.397 40.985 18.130 10.497 6.674 4.709 3.900 2.989 2.364 1.904 1.319
78.748 45.360 20.084 11.495 7.322 5.184 4.297 3.281 2.588 2.094 1.451
62.385 36.626 16.510 9.642 6.173 4.373 3.620 2.756 2.169 1.762 1.223 0.784 0.576
70.397 40.985 18.130 10.497 6.674 4.661 3.827 2.893 2.263 1.819 1.249 0.791 0.580
76.371 43.552 19.513 11.201 7.230 5.016
78.371 44.638 20.223 11.622 7.500 5.239
70.672 41.517 17.778 10.445 6.674 4.661
57.376 37.320 16.915 9.503 6.197 4.325 3.189 2.443 1.931 1.565 1.088 0.747 0.520
is given on the chart “K-factors for Various Pipe Sizes” below.
These numbers are based on extensive testing, which has
shown close agreement between different IEFS sensors in
the same installation. Typically, most K-factor errors can be
attributed to installation variables, such as depth setting and
tting conguration.
Problem
No pulse output
Output pulses incorrect
Probable Cause Try...
Unit not grounded
Below minimum ow cutoff
Flow reversed
Connect to earth ground
Check the Presence of Flow LED (see p. 12)
Note ow direction arrow,
reverse direction to meter
Output connections reversed
Pipe not full
Excessive electrical noise
No power
Power reversed
Fluid conductivity <20 microSiemens/cm
Missing or incorrect ground wire
Incorrect depth setting
Change output connections
Check plumbing
Check for proper electrical wiring
Check for power across power input terminals
Reverse connections
Select another ow meter
Check for proper ground
Check depth setting from
Dimension “C” table (page 4)
Fluid conductivity <20 microSiemens/cm
Empty pipe
Select another ow meter
Check for full pipe or install meter in the vertical
position
Not enough straight pipe
Check for air pockets or turbulence. Refer to
installation, page 6
Excessive electrical noise
Check for proper electrical wiring
Page 12
Jumpy reading
Rapidly changing conductivity (in chemical injection or fertigation applications)
Install chemical injection line downstream of
magmeter (or far enough upstream to allow
complete mixing of uids before meter)
Page 13
Page 9
WARRANTY/RETURN
Refer to "Terms and Conditions of Sale" in
our catalog or on our website. Contact customer
service to receive a Returns Goods Authoriza-
tion number before shipping your product back
for repair. Be sure to include a brief description
of the problem plus any relevant applciation
notes.
Dwyer Instruments, Inc. • 102 Indiana Highway 212 • Michigan City, IN 46360 • USA
(P) 219.879.8868 • (F) 219.872.9057 • 1.800.872.9141 • www.dwyer-inst.com
PL-OM-65200387-090412
9/04/12
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