Page 1
9 001:2008
CERTIFIED COMPANY
ISO
ISO
Flow Meters & Controls
Municipal/Industrial Magmeter Instructions
9001:2008
CERTIFIED COMPANY
iMAG
PROUDLY
MADE
IN THE
USA
Page 2
TABLE OF CONTENTS
General Information
General Information, Features ............................................................................................................. Page 1
Specications
Specifications, Dimensions, Flow Range ................................................................................................. Page 3
Installation and Grounding
Positioning the Meter,
Straight Pipe Recommendations, Full Pipe Recommendations, Fittings,
Calibration, Chemical Injection, Installing Gaskets............................................................................... Page 6
Tightening Flange Bolts
, Metal Pipe Installations, Plastic Pipe Installations ........................................ Page 7
Straight Pipe Recommendations ..................................................................................................... Page 8
Full Pipe Recommendations ............................................................................................................. Page 9
Inputs/Outputs and Operation
Remote Sensor Cable Installation ....................................................................................................... Page 10
External Power and Wiring .................................................................................................................. Page 11
Battery Power, Pulse Output, Analog Output, Hart Communication .................................................... Page 12
Digital Output, Serial Communication, Cable Control Wiring, K-Factors for High Speed Digital ......... Page 13
Output Applications .............................................................................................................................. Page 14
Changing Flow Meter Settings ............................................................................................................ Page 15
Troubleshooting
Problem, Probable Cause, Things to Try ............................................................................................. Page 15
TABLES, DIAGRAMS & CHARTS
Features ..................................................................................................................................................Page 1-2
Specications ..........................................................................................................................................Page 3
Flow Range, Accuracy, Dimensions .........................................................................................................Page 4-5
Metal Pipe Installation, Plastic Pipe Installation ......................................................................................Page 7
Straight Pipe Recommendations ............................................................................................................. Page 8
Full Pipe Recommendations ....................................................................................................................Page 9
Control Cable Wiring ................................................................................................................................Page 13
K-factors for High Speed Digital Output (High Frequency).......................................................................Page 13
Display Operation .................................................................................................................................... Page 15
Troubleshooting .......................................................................................................................................Page 16
Page 3
GENERAL INFORMATION
The iMAG-Series is the most economical anged electromagnetic
owmeter on the market. It is used in 3” to 12” pipe in municipal
or industrial water, waste and reclaimed water, pump stations
and packaged plant applications. The iMAG has no moving
parts and electrodes are designed to discourage fouling. This
magmeter requires no maintenance in applications where
debris would impede mechanical meters. There are no parts to
wear out. Minimal straight pipe requirements allow iMAG-Series
meters to be used in piping congurations where there is little
space between the meter and an elbow.
iMAG-Series meters are rated IP68 for applications where the
meter may be under water up to a depth of 10 feet (3 meters)
for prolonged periods of time.
Rate and total indication are standard. Rate and total units and
pulse output are settable via the front panel touch key pad by
FEATURES
Conguration Port (For Factory Use Only)
the user. Bi-directional ow is standard. Forward, reverse and
net ow can be read from the display. If forward and reverse
ow data needs to be sent to another device, Modbus output
is required.
The iMAG 3600 and 4600 can be externally powered with 9-36
Vdc at 30 mA average. The 4600 is also available in a battery
powered version.
The standard 20-foot (6 meter) cable also provides outputs for
use with a variety of Seametrics and other displays and controls
for remote reading, data logging and telemetry applications.
4-20mA passive current loop and high frequency outputs
are optional on the externally powered models. Pulse output
is standard on the battery powered model. The iMAG 3600
remote display meter can be supplied with an optional internal
AC power supply.
Multifunction Display
Light Sensor Keypad
Protective Cover with Magnetic Seal
Page 1
Page 4
GENERAL INFORMATION
FEATURES Continued
Rate and total indicator
Security seal & cross-drilled screws (2) for tamper-evidence
Power and Output cable port access, tamper-sealed
Conguration Port (For Factory Use Only)
Powder-coated ductile cast iron body & electronics housing
Equalization lug
Glass lled molded plastic liner
316SS electrodes (Inside)
Flanges, 150 lb. ANSI pattern
Rate and total indicator with protective cover and keypad sensors
Powder-coated ductile cast iron electronics housing
Security seal & cross-drilled screws (2) for tamper-evidence
Power and Output cable port access
Flanges, 150 lb. ANSI pattern
Equalization lug
316SS electrodes (Inside)
Santoprene/Polypropylene Liner
Welded steel epoxy-coated ow tube
iMAG 4600 - 300
Conguration Port
(For Factory Use Only)
iMAG 3600-0400
(Remote indicator)
Page 2
iMAG 4600 - 0400
Page 5
SPECIFICATIONS
SPECIFICATIONS*
Pipe Sizes 3”,4”, 6”, 8”, 10”, 12”
Flanges 150 lb. ANSI pattern
Pressure 150 psi (10.3 bar) working pressure
Temperature Operating 10˚ to 130˚ F (-12˚ to 54˚ C)
Storage -40˚ to 158˚ F (-40˚ to 70˚ C)
Accuracy +/- 1% of reading +/- 0.025% of full-scale ow from low ow cutoff to maximum ow rate of 10 m/sec
Low Flow Cutoff 0.5% of maximum ow rate
Materials Body (3” Only) Ductile cast iron, powder-coated
Body (4”-12”) Welded steel, epoxy-coated
Liner (3” Only) Noryl®
Liner (4”-12”) Santoprene/Polypropylene
Electronics Housing Ductile cast iron, powder-coated
Electrodes 316 stainless steel
O-ring (3” Only)
Display Type 128x64 dot-matrix LCD
Digits 5 Digit Rate 8 Digit Total
Units
Please Note:
All iMAG meters are factory set
for gallons per minute (GPM)
rate and gallons total. If other
units are required, they can be
programmed in the eld.
Bi-directional
1
Power DC Power 9-36 Vdc @ 250 mA max, 30 mA average
2
3
Pulse Frequency
Output
AC Power
Battery
Signal Current sinking pulse, isolated, 36 Vdc at 10 mA max
Pulse Rates User-scalable from 0.1 to 99,999.9 volume units/pulse. Pulse width is one-half of pulse period with
Options 4-20mA Current Loop Isolated, passive, 24Vdc, error less than +/- 0.1% of pulse/frequency output
Digital Output Isolated, open collector, 24 Vdc, 650 Ω maximum loop resistance
Serial Communications Isolated, asynchronous serial RS485 (Recongurable for RS232 or 3.3V CMOS), Modbus RTU protocol
Cable Control Cable Six-conductor water-blocked cable, polyurethane jacket, 20ft (6m) standard length for power, pulse
Remote Display Cable
(iMAG 3600)
Conductivity >20 microSiemens/cm
Empty Pipe Detection Hardware/software, conductivity-based
Regulatory
Environmental IP68 to 10ft (3m) depth
EPDM
Rate Volume Units Rate Time Units Total Volume Units
Gallons
Liters
Barrels (42 gallon)
Cubic Feet
Cubic Meters
Million Gallons
Mega Liters
Imperial Gallons
Million Imperial Gallons
Second
Minute
Hour
Day
Gallons
Gallons x 1000
Million Gallons
Liters
Kilo Liters
Mega Liters
Barrels (42 gallon)
Cubic Meters
Cubic Meters x 1000
Cubic Feet
Cubic Feet x 1000
Million Cubic Feet
Imperial Gallons
Imperial Gallons x 1000
Million Imperial Gallons
Forward Total, Reverse Total, Net Total
85-264Vac, 50/60Hz, 0.12A
Two lithium 3.6V ‘D’ batteries, replaceable. See chart on page 11 for battery life expectancy.
minimum pulse width of 2.5 ms, 200 pulses/sec max, 10 pulses/sec max battery option
frequency or optional outputs (optional lengths up to 100’ available)
33ft (10m) standard length (optional lengths up to 100’ available)
(EN 61326) pending, NSF-61 on 3” ONLY
*Specications subject to change. Please consult our website for the most current data (www.seametrics.com).
1
If forward and reverse ow data needs to be sent to another device, either the -ADDX, -DDDX or Modbus output is required.
2
iMAG3600 only, iMAG4600 requires external AC power supply
3
iMAG4600 only
Page 3
Page 6
SPECIFICATIONS
DIMENSIONS
H
Cable Exit
T
(Metal Flange)
L
(Including Rubber Gaskets)
iMAG4600 - 0300 Shown
ID
iMAG3600 Remote Shown
.20” Dia.
5.62”
H
Cable Exit
T
(Metal
Flange)
Cable Exit
5.27”
iMAG4600 - 0400 to 1200
Shown
4.38”
ID
2.5”
3”
L
(Including Rubber Gaskets)
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Page 7
SPECIFICATIONS
0
1
2
3
4
5
33 0 5 10 15 20 25 30
iMAG Dimensions
Shipping
Weight
iMAG
Meter Size
L H T ID
inch mm inch mm inch mm inch mm pounds
3” 12.0 305 6.80 173 .68 17.3 2.60 66.04 41 19
4” 10.24 260 8.12 206 .62 20.9 3.12 79.25 35 16
6” 12.27 312 9.22 234 .69 23.3 5.05 128.27 50 23
8” 14.24 362 10.22 260 .69 23.3 6.44 163.58 72 33
10” 18.18 462 11.22 285 .69 23.3 8.61 218.69 128 58
12” 19.68 500 12.28 312 .81 20.6 10.55 267.97 170 78
Flanges Standard ANSI 150 lb. drilling
Cable 1 lb.
iMAG Accuracy
5
4
3
Kg
Accuracy (%)
2
1
33
(m/s)
(ft/s)
0
0
5
10 15
420 6 8 10
20
25 30
Flow Velocity
FLOW RANGE (3” - 12”)
Pipe Size
(Inches in diameter)
Max Flow Rate
(Gallons/Minute)
Cut-off (min) Flow Rate
(Gallons/Minute)
Max Flow Rate
(Liters/Second)
Cut-off (min) Flow Rate
(Liters/Second)
Max Flow Velocity
(Meters/Second)
3” 4” 6” 8” 10” 12”
723 1285 2891 5140 8031 11565
3.62 6.43 14.46 25.70 40.15 57.82
46 81 182 324 507 730
0.23 0.41 0.91 1.62 2.54 3.65
10 10 10 10 10 10
Page 5
Page 8
INSTALLATION and GROUNDING
INSTALLATION
Caution: These ow sensors are not recommended
where installation may expose the ow sensor to boiler
pressure and temperature. Maximum
recommended operating temperature is 130˚ F.
Positioning the Meter. These meters can be installed
horizontally, vertically, and in any radial position. Using a
check valve on the upstream side of the meter, and/or an air
vent (vacuum relief valve) in the same, unobstructed run of
pipe as the meter, is required in any installation where the
meter may be exposed to suction when the system is not in
normal operation. Suction can cause damage to the liner.
Liner damage caused by suction, without the use of a check
valve and/or air vent, may void the warranty.
Straight Pipe Recommendations. As with most ow meters,
the iMAG requires straight pipe before and after the meter for
best accuracy. However, the ability of electromagnetic meters
to average the ow across the entire pipe allows for shorter
straight pipe recommendations than most mechanical meters
(see page 7).
Installing Gaskets
GASKETS
Gaskets are required at all junctions.
(Not applicable to 3” model.)
1. Select a suitable full-face gasket.
• Only use at compressible gaskets (either pliable
or hard ber will work).
• Use a material compatible with the uid you will be
using.
• Thickness should be 1/8” - 1/4” (3 - 6 mm),
depending on the atness of the pipe ange
surface.
• Inner diameter must be larger than opening in ow
meter.
2. Be sure all mating surfaces are smooth and free of
debris.
3. Install gaskets on each end of meter as shown in
diagrams below. If using grounding rings, install one
gasket on each side of the grounding ring.
Full Pipe Recommendations. All magmeters require a
method for determining that the pipe is empty, to prevent false
reading. This meter is designed to indicate ‘EMPTY PIPE’ if one
or more electrodes is exposed. For highest accuracy, install
the meter so that the pipe will be full when there is ow. If air
bubbles may be present in the pipe or sludge accumulation
is an issue, rotate the meter by one ange hole to position
the control housing at a 45˚ angle (see diagrams on page 8).
Fittings. The iMAG anges have standard ANSI 150 lb. drilling
pattern and mate with any other ANSI 150 lb. ange. See table
on next page for ange bolt tightening torque specications.
Calibration. The iMAG is factory-calibrated and will not require
any form of eld calibration.
Chemical Injection. When any magmeter, by any manufacturer, is used in a chemical injection application, 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
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.
Gaskets
Installation without gaskets
Grounding
Rings
Gaskets
Installation with gaskets
Caution: In chemical injection applications, install
chemical injection point downstream of magmeter, or
far enough upstream to allow complete mixing of uids.
Page 6
Page 9
INSTALLATION and GROUNDING
Tightening Flange Bolts
NOTE: Mating pipe anges must be ANSI 150# full face (FF)
and/or raised face (RF).
1. Tighten ange bolts in an alternating pattern.
• Tighten left ange bolt-1 to 20% recommended
torque.
• Tighten right ange bolt-1 to 20% of
recommended torque.
• Repeat steps a and b for each bolt in an
alternating order, such as shown at right,
tightening to 40%, then 60%, then 80%, and then
100%.
2. Test for leaks.
3. If needed, tighten further in 10% increments until
leaking stops. DO NOT over-tighten. Over-tightening
can cause serious damage to the ow meter.
4. Recheck after 24 hours, adjusting if needed.
1
5
8
Equalization and Grounding
WARNING: ELECTRICAL SHOCK HAZARD
When the iMAG is installed in a plastic
piping system, or when externally powered,
the piping system must be grounded to meet
national and local electrical safety codes.
Failure to do so can result in electrocution.
Metal Pipe Installations. To equalize the electrical potential
of the uid, the iMAG meter, and the surrounding pipe, secure
the ange plates (factory-installed on the equalization wire)
to both pipe anges at one of the bolt holes, as shown below.
Be sure the lock washer ts between the pipe ange and the
ange plate. For the best electrical bonding, remove rust
and paint to expose clean, bare metal where the equalization
ange plate lock washer contacts the pipe ange. Connection
must be inspected periodically for corrosion to maintain the
necessary low resistance connection.
Meter Flange
Gasket
Pipe Flange
Lockwasher
Flange Plate
Equalization Lug
3
7
4
6
2
Suggested Tightening Sequence
Caution: Improper tightening sequence
can cause serious damage to the ow
meter.
• Do not tighten one side at a time.
• Do not tighten each bolt completely at
one time.
SUGGESTED FLANGE BOLT TORQUE
Santoprene Liner
Pipe Size ft-lb Nm
3” 25 34
4” 20 27
6” 42 57
8” 65 88
10” 73 99
12” 97 132
Meter
Flange
Gaskets
Pipe
Flange
Metal PipeMetal Pipe
Plastic Pipe Installations. When the iMAG is installed in a
plastic piping system, grounding rings are recommended
(except 3” pipe size), especially in the presence of electrical
interference sources such as VFD pump drives. As shown in
the diagram below, the equalization wires should then be
connected to the grounding ring tabs instead of the ange
bolts as in metal piping installations. Where lightning is a
threat, or in severe electrical environments, an optional
connection to a nearby equipment ground or ground rod may
be advisable.
Equalization Lug
Grounding Ring
Gaskets
Plastic
Pipe
#6, #8, or #12 AWG Stranded
Copper Ground Wire < 5’
Grounding Ring Part Numbers:
4” = 100876 10” = 100879
6” = 100877 12” = 103288
8” = 100878
Grounding Ring
Gaskets
Plastic
Pipe
Ground Clamp
(Exothermically weld when
corrosion is a concern)
Earth
8’ Ground Rod
Page 7
Page 10
STRAIGHT PIPE RECOMMENDATIONS
(X = diameter)
Reduced Pipe
Two Elbows In Plane
Two Elbows, Out Of Plane
1X
2X
iMAG
1X
2X
iMAG
1X
2X
Expanded Pipe
Swirling Flow
Propeller Meter
5X
5X
iMAG
iMAG
5X
1X
1X
iMAG
1X
Swirling Flow
Partially Open
Buttery Valve
Page 8
iMAG
Page 11
FULL PIPE RECOMMENDATIONS
Recommended:
Keep pipe full at meter for accuracy
iMAG
iMAG
Not Ideal:
Allows air pockets to form at meter
iMAG
Recommended:
Keeps pipe full at meter for accuracy
iMAG
Recommended:
Allows air to bleed off
Intermittent air
Electrode
moved from
top by rotating
meter
iMAG
miss electrode
Electrodes free
from sediment
bubbles
build-up
iMAG
Not Ideal:
Post-valve cavitation can create air pocket
iMAG
Not Ideal:
Air can be trapped
Intermittent air
bubbles
pass over
electrode
Possible
sediment
build-up
iMAG
Recommended:
Improved accuracy results from
unimpeded electrodes
Not Ideal:
Air bubbles and sediment on the
electrodes can affect accuracy
Page 9
Page 12
INPUTS/OUTPUTS and OPERATION
g
.20” (15mm) Splice4” (102mm) Wire Length
AC
Sealing Nut
REMOTE SENSOR CABLE INSTALLATION (iMAG3600 ONLY)
and tighten securely. A loose nut could cause moisture ingress
and compromise the meter head’s IP68 rating, voiding the
The standard 33 foot (10m) cable connecting the iMAG3600
sensor body to the remote display head is shipped with the
cable disconnected at the display end. To connect during
installation:
1. Remove the four cap screws securing the top housing
to the lower housing and swing the top open to expose the
internal wiring (see photo.)
2. Remove the sensor cable hole plug and discard.
3. After removing the cable gland bulkhead nut, insert the
5-postion plug and cable gland threaded bushing into the
open hole. (see drawing.) Do not loosen the cable jacket
sealing nut.
Control Cable
Power Cable
Sensor Cable
Bulkhead Nut
warranty.
6. Slide the cable outward through the loosened cable gland
until the jacket just protrudes past the cable gland bulkhead
threads.
7. Retighten the gland sealing nut until cable cannot be
pushed in by hand and then tighten an additional full turn.
Pull on cable to assure sufcient tightness.
8. Insert the ve-position plug into the mating receptacle on
the small circuit board attached to the larger main display
circuit board.
9. Close the top cover and replace the four cap screws,
securing tightly to reseal the housing against moisture ingress.
Lower Housing Bulkhead
5-Position Plu
Cable from
Sensor
Position 1 - Drain
Position 2 - Brown
Position 3 - Yellow
Position 4 - Orange
Position 5 - Black
1
2
3
4
5
4. Install the bulkhead nut back onto the cable gland threads
inside the housing and tighten securely. A loose nut could
cause moisture ingress and compromise the meter head’s
Top Housing
IP68 rating, voiding the warranty.
5. Insert the ve-position plug into the mating receptacle on
the small circuit board attached to the larger main display
5-Position Plug
1
2
3
4
5
Mating Receptacle
circuit board.
6. Close the top cover and replace the four cap screws, securing
tightly to reseal the housing against moisture ingress.
7. Do not remove gel packs.
Lengthening the Sensor Cable. Replacing the entire cable
Shortening the Sensor Cable. The sensor cable may be
shortened by cutting the cable at the display head end. Under
no circumstances should the cable gland at the sensor body
end be removed as this will compromise the IP68 moisture
ingress protection causing meter failure and voiding the
warranty. To shorten the cable follow the steps below:
1. Before cutting, loosen the cable gland sealing nut and slide
the gland back past where the cable will be cut.
2. After cutting, remove the jacket and outer braid shield
and cut and strip conductors to the dimensions shown in the
drawing (right). Tinning the bare wire ends is recommended
when possible for easier reinsertion into the 5-position plug.
3. Insert a small jeweler’s screwdriver or pick into the slot
next to the black wire on the 5-position plug and pull the wire
out. Then insert the black wire from the shortened cable into
the same position as the wire just removed. Repeat this step,
one wire at a time, for all ve positions.
4. Remove the sensor cable hole plug and discard.
5. After removing the cable gland bulkhead nut, insert the
plug and cable gland bushing through the open hole. Install
the nut back onto the cable gland threads inside the housing
with a longer cable is not recommended. To extend the
distance from the sensor body to the remote display head:
1. Install a junction box with two holes for 5/8” connector
bushings at the cable splicing location.
2. Install the sensor cable gland threaded bushing into one
junction box hole and secure with the bulkhead nut.
3. Obtain the required additional length of 2-pair Seametrics
sensor cable and two additional cable glands, installing the
additional cable and glands from the junction box to the display
head. Secure all cable gland sealing and bulkhead nuts to
tightness required to prevent moisture ingress as described
in previous instructions. Use pull test to assure sufcient
tightness.
4. Splice wires in junction box using moisture-sealed wire
connectors or pot to seal against moisture ingress. Replace
junction box sealing cover.
5. Connect 5-position plug to the small circuit board receptacle
in the display head as described in previous instructions.
6. Warning! Extending the length of the sensor cable
beyond 100 feet (30 meters) may cause the meter to
malfunction.
Page 10
Page 13
INPUTS/OUTPUTS and OPERATION
Sealing Nut
Contr
AC
Sealing Nut
Control Cable
AC
2” (50mm)
(10mm)
(Nor
GROUND
NEUTRAL
th America)
LINE
WIRING TO POWER SOURCES AND EXTERNAL MONITORING
AND CONTROL EQUIPMENT
The six-conductor Control Cable exiting the display head
provides user connections for DC power as well as for external
monitoring and control equipment needed for pump control,
SCADA equiment, Programmable Logic Controllers, remote
displays and other monitoring equipment. A four-character
Option Identier (OID) code found in the “Control Cable Wiring”
table on page 11 shows available combinations of external
wiring connections. In addition, it gives the corresponding
electrical function for each of the wires in the cable. The OID
code is also included in the model number on the meter as well
as on the label attached to the control cable as shipped from
the factory. The rst character in the OID code identies the
power source as either external DC (D) or internal AC (A). The
next two characters identify the functions of the other wiring
options such as Pulse Output (P), Analog Output (L), Digital
Output (D) or Serial Output (SS.) (The fourth character (X) is
reserved for future applications.) Application, wiring and other
electrical interface guidelines for each of these is outlined in
the following paragraphs.
2. Loosen the cable gland sealing nut, remove the plug
and insert the unconnected cable end through the open
hole.
ol Cable
Power Cable
Sensor Cable
Bulkhead Nut
3. Strip cable jacket and conductors (see below) and install
3-conductor power cable and wire to Line (L), Neutral (N)
and Ground (G) positions on power supply terminal block
as shown below
Green
th America)
Green-Yellow
(International)
White
(North America)
Blue
(International)
Black
(Nor
Brown
(International)
Sensor Cable
Power Cable
Bulkhead Nut
DC Power Connection. When the rst OID code character is
a “D”, connect the RED and BLACK wires to the positive and
negative terminals respectively of a clean (low-noise) source
of dc power in the range of 9-32Vdc and able to supply at least
250mA. AC line-operated power supplies with outputs greater
than 18Vdc must be regulated. Where possible, connections
from either power supply terminal to the cable shield or any
other ground should be avoided.
AC Power Connection. When the rst OID code character
is “A”, the RED and BLACK wires are not used. Instead, 85264Vac power is supplied to the ow meter via a separate
meter housing cable-entry gland and user-supplied threeconductor power cord having local regulatory agency approval.
If installed outdoors or less than 33 ft. (10m) from a utility
power service entrance, ac power should be supplied via a
properly-grounded surge suppression device. See diagrams
below for wiring instructions.
WARNING
!
HIGH VOLTAGE
DISCONNECT AC
POWER SOURCE
BEFORE SERVICING.
3/8”
4. Tighten terminal block screws securely using 1/8”
(3mm) screwdriver. Tighten the cable gland sealing nut
securely. A loose nut could cause moisture ingress and
compromise the meter head’s IP68 rating, voiding the warranty.
1. Using a 5/32” hex driver, remove the four cap screws
securing the top housing to the lower housing and swing the
top open to expose the internal wiring and components.
5. Close the top cover and replace the four cap screws,
securing tightly to reseal the housing against moisture
ingress.
Page 11
Page 14
INPUTS/OUTPUTS and OPERATION
Tap
Tap
Battery Power. The iMAG 4600 meter can come congured
with two replaceable 3.6V lithium ‘D’ batteries. In this
conguration, the only option/output is the scaled pulse
output which comes standard. The scaled output for the
battery powered option has a maximum frequency of 10Hz,
with a xed pulse width of 10ms. Be sure to set your P value
such that the meter will function properly over the ow range
in your application. See the tech bulletin on this topic for
more details. The sample rate of the meter is user selectable
through the SAMP tab in the meter’s sub-menu. Sample
periods of 0.2, 0.33, 1, 3, 5, 15, 30, and 60 seconds can
be selected. Larger sample periods will yield longer battery
life but slower response time. Care must be taken to select
a sample period that us suitable for your application. See
the table on the next page for the expected battery life as a
function of sample period.
Battery Life/Sample Period
Sensor sample period(s)
Expected battery life*
(Seconds)
1/5 (0.2) 1 year
1/3 (0.33) 1.5 years
1 2.5 years
3 4 years
5 5 years
15 5.5 years
30 6 years
60 6.5 years
*Based on 75% battery capacity at room temperature with no option cards
installed. NOTE: If a large percentage of the meter’s life will be spent below
0.5 meters/second and above cutoff, battery life will be reduced.
Pulse Output Connection. When the second OID code
character is “P”, refer to the “Digital Output Application”
diagrams on page 12 for recommended pulse output
connections to external equipment. Since this is an isolated
output, the external equipment must include a dc power
source to regenerate the pulse from the open-collector
output (transistor equivalent of a contact closure). A pull-up
or pull-down resistor may be needed if not included in the
user equipment as shown in the diagrams. Both the power
source and resistor may be supplied internally in some
types of control and monitoring devices. If not, as for most
PLC discrete input modules, they must be added externally
at the module input terminals. Pulse output rate in volume
units/pulse is user-settable via the SET P tab on the meter’s
setup menus.
Analog Output (4-20mA) Connection. When the second or
third OID code character is “L” or “H”, refer to the “Analog
Output Application” diagram on page 12 for 4-20mA current
loop output connections to external analog input devices.
Since the meter’s analog output is isolated and passive, loop
power must be supplied externally as shown. (In addition, an
external resistor RL will be needed to convert the loop current
to voltage for voltage-only input devices.) The meter’s loop
transmitter minimum voltage drop is 6Vdc (8Vdc with HART)
which, with wiring resistance and loop power supply voltage,
will determine the maximum resistance for RL. The ow rates
corresponding to 4 and 20mA are user-settable via the SET
4 and SET20 tabs on the meter’s setup menus.
(Optional) Setup and Connection to a HART Network. The
HART protocol, rev.7.5, allows for a Polling address of 0-63.
The default value in the iMAG is 0. To change the Polling
address, use iMAG menu HPOLL to set the Polling address.
To get to this menu, move to the EXIT tab and tap the
4 times. This will bring up another menu page
containing the tab HPOLL. Use the
to select the
Polling address.
A minimum of 250 ohms of loop resisitance must be present
in order for the HART modem to correctly and reliably
demodulate FSK voltage. With this in mind, the maximum loop
resistance* for the iMAG HART interface cannot be exceeded
in order to assure correct operation.
Use of HART Communicator. The iMAG HART interface is
HART compatible. All the commands have been implemented
in accordance with the HART Protocol Specication published
by HART Foundation. A HART Communicator can be used with
the iMAG, even in the absence of DD les, by taking advantage
of the Generic Online Menu capability of a Communicator.
This means that a generic menu is automatically available
when DD les are not present.
The following information from the iMAG HART can be
displayed on the Communicator using the generic menu:
PV Flowrate in units selected for iMAG
PV Loop Current Loop current in mA
PV LRV
PV URV
Lower range value of PV in units
selected for iMAG
Upper range of PV in units selected for
iMAG
*4-20 mA loop has maximum loop resistance of 650ohms
and requires a 24Vdc power supply.
Page 12
Page 15
INPUTS/OUTPUTS and OPERATION
Digital Output Connection. When the second or third OID code
character is “D”, refer to “Digital Output Application” diagrams on
page 12 for recommended connections to external equipment.
These outputs are electrically similiar to the Pulse Output described
above except they are capable of output frequencies up to 10kHz.
Frequency output scaling is user-settable via the FOUT tab on the
meter’s setup menus. Selections are: 500Hz and 1, 2, 5 and 10
KHz at maximum ow rate.
Serial Communication Connection. When the second and third
OID code characters are “SS”, refer to “Control Cable Wiring” table
below for recommended connections to external equipment. These
Control Cable Wiring
Power
Source
AC
DC
DC
DC
DC
DC
DC
AC
AC
AC
AC
AC
Battery
4-20mA Output 1 Digital Output DDLX DC PWR + DC PWR - Out 1 + Out 1 - 4-20mA Out + 4-20mA Out -
4-20mA Output 1 Digital Output ADLX Do Not Connect Do Not Connect Out 1 + Out 1 - 4-20mA Out + 4-20mA Out -
Options
Installed
One Pulse, HART APHX Do Not Connect Do Not Connect Pulse + Pulse - 4-20mA Out + 4-20mA Out -
One Pulse, HART DPHX DC PWR + DC PWR - Pulse + Pulse - 4-20mA Out + 4-20mA Out -
One Pulse, 4-20mA Output DPLX DC PWR + DC PWR - Pulse + Pulse - 4-20mA Out + 4-20mA Out -
Two Digital Outputs DDDX DC PWR + DC PWR - Out 1 + Out 1 - Out 2 + Out 2 -
RS-485 Serial Comm DSSX DC PWR + DC PWR - RTS Signal Ground B A
One Pulse Output DPXX DC PWR + DC PWR - Pulse + Pulse - Do Not Connect Do Not Connect
One Pulse, 4-20mA Output APLX Do Not Connect Do Not Connect Pulse + Pulse - 4-20mA Out + 4-20mA Out -
Two Digital Outputs ADDX Do Not Connect Do Not Connect Out 1 + Out 1 - Out 2 + Out 2 -
RS-485 Serial Comm ASSX Do Not Connect Do Not Connect RTS Signal Ground B A
One Pulse Output APXX Do Not Connect Do Not Connect Pulse + Pulse - Do Not Connect Do Not Connect
One Pulse Output BPXX Do Not Connect Do Not Connect Pulse + Pulse - Do Not Connect Do Not Connect
OID
Codes
Red Black Green White Orange Blue
connections provide a half-duplex, isolated, RS485 serial
communications port using the Modbus messaging protocol.
The port is recongurable by internal jumper settings to
full-duplex RS232 or 3.3V CMOS. The TXD connection
is the transmitted data output from the meter and RXD
is the received data input to the meter. See Seametric’s
Modbus Interface Description, LT-103393 (available at www.
seametrics.com) for supported Modbus message protocol
and electrical interface specications.
Cable Shield. In general, the cable shield and its bare drain
wire should be left unconnected at the user equipment end
of the cable to minimize “ground loop” problems.
Cable Conductor Usage
K-factors for High Speed Digital Output (High Frequency)
Size 500 1K 2K 5K 10K
3” 41.55125 83.10249 166.205 415.5125 831.0249
4” 23.3463 46.69261 93.38521 233.463 466.9261
6” 10.37703 20.75406 41.50813 103.7703 207.5406
8” 5.836576 11.67315 23.3463 58.36576 116.7315
10” 3.735525 7.47105 14.9421 37.35525 74.7105
12” 2.594034 5.188067 10.37613 25.94034 51.88067
FOUT (Hz)
Page 13
Page 16
Current Sourcing Pulse
INPUTS/OUTPUTS and OPERATION
Pulse or Digital Output Application - Sourcing Mode (Recommended for Rin < 30kΩ)
Open
Collector
Transistor
+
_
Green*
White*
+
_
Power
+
Source
V
s=3-36Vdc
47k Ω
Pull-down
Resistor
_
і
out
Vs
+
V Out
V Out
_
Rin
0
Meter Cable User Equipment
Pulse or Digital Output Application - Sinking Mode (Recommended for Rin > 30kΩ)
Waveform
Power
_
Source
+
V
s=3-36Vdc
Open
Collector
Transistor
+
_
Green*
White*
+
_
Pull-up
Resistor**
Meter Cable User Equipment
Analog (4-20mA Current Loop) Output Application
Power
Source
+
s=6-36Vdc
V
_
Analog
Output
+
_
Orange*
*
Blue
+
_
Meter Cable User Equipment
і
out
RL***
і
Loop
+
V Out
_
_
+
Current Sinking Pulse
Vs
V Out
Rin
0
4-20mA
Current Output***
Waveform
* Wire colors shown are typical but because there are exceptions, always refer to the color codes shown on the cable label or “Control Cable Wiring” table on page 11.
** Minimum resistor value is (100 x Vs) ohms. Higher resistances maybe used depending on frequency and cable length. Longer cables and high frequencies require
lower resistance.
*** Resistor RL converts 4-20mA current to voltage for voltage input only devices.
Page 14
Page 17
Tap
Tap
Hold Tap
INPUTS/OUTPUTS and OPERATION
1.2345678
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT S ET PDAMP
SET 4SET 20 S ET F EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
FWD TOTAL
Hold Tap
Tap
Hold Tap
Tap
Tap
Tap
Tap
Hold Tap
Tap
Hold Tap
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
FWD TOTAL
CHANGING FLOWMETER SETTINGS
The HOME Screen. The HOME Screen shown below is the normal
screen which displays TOTAL FORWARD ow volume, direction of
the ow total and ow RATE along with status conditions such as
Empty Pipe. Two buttons below the LCD display are used to access
menu screens for viewing and changing meter setup parameters.
TOTAL
CU FT
X1000
RATE
100
FWD TOTAL
GPM
Button Sensors. The two buttons are light sensors which can
detect when a nger is covering them. Only three button touch
actions are needed to control navigation through the menus,
settings changes and back to the home screen. They are:
HORIZONTAL SCROLLING: Tap right-hand button
to scroll horizontally through menu tabs or move
horizontally within a tab dialog when applicable.
SELECT: Tap left-hand button to change a highlighted
item within a tab dialog.
ENTER/EXIT: Hold left button while tapping
+
right button once to enter or exit a tab dialog
or to navigate between the HOME and other
menu screens.
Main Menu. All menu screens consist of two rows of tabs
surrounding a dialog box that lets you view and change setup
parameters. For the MAIN MENU, the tabs have the following
functions:
TAB FUNCTION
T UNIT View or change TOTAL volume units
R UNIT View or change ow RATE units
SET P View or change pulse output scaling
DAMP View or change lter settings
SET 4 View or change ow rate corresponding to 4mA
SET 20 View or change ow rate corresponding to 20mA
SET F View or change high frequency output scaling
EXIT Return to HOME SCREEN or Enter SUBMENU
To enter the MAIN MENU perform the hold and tap sequence:
(See chart on page 12)
+
T UNIT R UNIT SET PDAMP
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
SET 4SET 20 S ET F EXIT
Once in the main menu you can move from tab to tab by
tapping the button:
In the dialog box for the currently highlighted tab you will
see that tab parameter’s current value. In the previous
screen illustration, the rst line indicates that the current unit for the TOTAL is GALLONS. The next two lines in
the dialog box tell you what to do next. If you would like
to change the TOTAL units, just perform the hold and tap
sequence to bring up a dialog box that will
tell you how to change the setting.
+
You select the new setting by scrolling through a list of
selections as in the screen illustration below by tapping
to nd a different TOTAL unit.
T UNIT R UNIT S ET PDAMP
TOTAL:
PRESS TO CHANGE
SET 4SET 20 S ET F EXIT
GALLONS
Similiarly, for the SET tabs, the dialog box instructions will
tell you how to change a numerical value using both the
and buttons.
To accept any changes you’ve made just hold and tap
again, and the changes will be saved and you will be
returned to the MAIN MENU screen where you can move to
another tab.
When you are nished making changes, move to the EXIT
tab using:
To return to the HOME screen, hold and tap:
+
Submenu. The EXIT tab in the MAIN MENU has a second
function. If, instead of using the hold and tap sequence to
return to the HOME screen, you tap four times.
You will be redirected to a SUBMENU screen which provides access to more information about the meter, such as
serial numbers, rmware revisions, Modbus, HART, battery
options and the bi-directional ow options display which
toggles between FWD, REV and NET TOTAL. Navigation in
this SUBMENU is the same as for the MAIN MENU. Whenever you wish, go to the EXIT tab in the SUBMENU and use
the hold and tap sequence to return to the
MAIN MENU.
Please Note:
All iMAG meters are factory set for gallons per minute (GPM) rate and gallons total. If other
units are required, they can be programmed in the eld.
+
Page 15
Page 18
TROUBLESHOOTING
PROBLEM PROBABLE CAUSES Tr y…
Blank Display Faulty wiring from power source to
meter or faulty AC power supply
Check for miswiring. Measure voltage with DMM
where red and black wires connect to terminal
block TB2 inside meter display head. Verify correct polarity and conrm that voltage is steady and
between 9Vdc and 32Vdc
Flow rate reads zero continuously
Flow is below cutoff Increase ow above cutoff
regardless of ow
Flow rate shows [-] negative ow
Meter is installed backwards Reinstall correctly
and FWD total remains at [0] zero,
when ow is greater than cutoff
Flow rate reading uctuates excessively when ow is unchanging
Excessively turbulent or unsteady
ow due to partially closed valves
or other ow obstructions
Eliminate or minimize causes of ow disturbances
or increase meter damping
Flow Rate appears correct but
pulse/ frequency output is low,
erratic or absent
Flow Rate appears correct but
pulse/frequency output is erratic
and/or too high
Pipe not full.
Pulsing ow due to combining mul-
tiple upstream ow sources
Insufcient mixing of upstream
chemicals
Low uid conductivity < 20 µS/cm
Noisy electrical environment
Defective or noisy ac switching
power supply
Wiring incorrect
External device input impedance
too low
Cable too long
Electrical noise sources interfering
with pulse frequency signal
Wrong type of cable
Provide back pressure or other means to ensure
pipe is lled
Move connection point further upstream
Move chemical injection downstream from meter
Replace with different type of meter
Improve grounding at meter and nearby potential
ly noisy electrical equipment. Increase distance
between meter and electrical noise sources.
Replace power supply
Compare wiring with appropriate wiring recommendations
Use sourcing rather than sinking interface connec-
tion
Reduce interface pull-up resistance
Isolate, remove or reduce noise sources. Move
meter control cable away from noise sources.
Use only twisted pair cable and ensure both signal
wires are on same twisted pair
Grounding problem
Flow rate reads “COMM FAIL”
instead of rate
Cable between ow sensor body
and display head is disconnected,
miswired or damaged
Page 16
Improve or try different grounding method.
Inspect cable for damage. Check cable connection
inside display head for correct wiring to ve-position connector, ensure that connector is properly
inserted, inspect for broken connections.
Page 19
NOTES
Page 17
Page 20
Seametrics Incorporated • 19026 72nd Avenue South • Kent, Washington 98032 • USA
(P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • www.seametrics.com
LT-103199r1.5 20161101
11/1/16
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