Seametrics AG90 User manual

EX90-SeriesEX90-Series
AG90 SeriesAG90 Series
Electromagnetic InsertionElectromagnetic Insertion
Flow MeterFlow Meter
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AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 2 seametrics.com
TABLE OF CONTENTS
General Information
General Information ...................................................................................................................................................Page 3
Features...........................................................................................................................................................................Page 3
Specications ................................................................................................................................................................Page 4
Flow Rate ........................................................................................................................................................................Page 4
Dimensions ....................................................................................................................................................................Page 5
Installation
Chemical Injection or Fertigation..........................................................................................................................Page 6
Fitting Installation........................................................................................................................................................Page 6
Meter Installation ........................................................................................................................................................Page 6
Saddle Installation.......................................................................................................................................................Page 7
Straight Pipe Recommendations...........................................................................................................................Page 8
Full Pipe Recommendations....................................................................................................................................Page 9
Connections
General Cable Information.......................................................................................................................................Page 10
Cable Gland Opening and Sealing........................................................................................................................Page 10
Cable Installation .........................................................................................................................................................Page 10
Wiring Diagrams ..........................................................................................................................................................Page 11
Cable Wiring Table ......................................................................................................................................................Page 11
Conguration
Cable Shield...................................................................................................................................................................Page 12
Pulse Output..................................................................................................................................................................Page 12
Operation
Minimum Flow..............................................................................................................................................................Page 13
Filtering............................................................................................................................................................................Page 13
Electrode Coating........................................................................................................................................................Page 13
Changing Flow Meter Settings - Standard Menu Options..........................................................................Page 13
Changing Flow Meter Settings - Submenu.......................................................................................................Page 13
Changing Flow Meter Settings - Home Screen and General Navigation..............................................Page 15
Changing Flow Meter Settings - Making Selections......................................................................................Page 15
To Change a Passcode...............................................................................................................................................Page 16
Power Indicators ..........................................................................................................................................................Page 16
Battery Powered Units ...............................................................................................................................................Page 17
Troubleshooting & Error Messages
Problem...........................................................................................................................................................................Page 18
Probable Cause.............................................................................................................................................................Page 18
Things to Try..................................................................................................................................................................Page 18
Error Messages .............................................................................................................................................................Page 19

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 3 seametrics.com
GENERAL INFORMATION
Features
The AG90 battery powered, insertion electromagnetic ow
meter is designed for use with conductive uids in 4”–12”
pipe. The AG90’s stainless steel body allows the meter to
operate in a wide range of temperatures, pressure, and
corrosive or dirty environments.
The AG90 is highly suitable for dicult applications. With
no moving parts, over-run conditions will not degrade the
life of the AG90. It is resistant to wear from debris found in
surface or ground water and there are no bearings to wear
out or propellers to damage.
Rate and total units can be set via the front panel touch key
pad by the user. Bidirectional ow is standard with totals
available in forward, reverse, net, batch forward and batch
reverse.
The AG90 is battery powered and an output cable is
available for transmitting the pulse signal to remote
devices. The AG90 includes a Seametrics saddle which has
been designed to accommodate a wide range of pipe sizes
and types while ensuring correct placement in the pipe.
In addition, an optional internal data logger allows local
storage of ow history.
Quickly and easily change Total Volume Units, Flow Rate Units, Pulse Output
Scaling, and many other settings using the two light sensor button controls on the
display panel.
Saddle Included
Battery Powered
Bidirectional Flow Reading
Pulse Scaled Output
Built-in Data Logger (Optional)
C276 Hastelloy electrodes
PVDF electrode cap
O-ring, EPDM Powder-coated diecast aluminum
electronics housing
Sensor body (Stainless)
Output cable connector
Rate and total indicator with
light sensor button controls
Equalization lug
Data logger connector (optional)
Hinged Display Cover
Included saddle & hardware

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 4 seametrics.com
Specications*
GENERAL INFORMATION
Flow Rate (4” - 12”)
Pipe Size 4” to 12”
Materials Sensor Body 316 SS
Electrodes Hastelloy
Housing Powder-coated diecast aluminum
Electrode Cap PVDF (Kynar®)
O-Ring EPDM
Temperature Operating 10˚ to 140˚ F (-12˚ to 60˚ C)
Storage -40˚ to 158˚ F (-40˚ to 70˚ C)
Fluid Temp. 32˚ to 200˚ F (0˚ to 93˚ C)
Pressure 200 psi (14 bar)
Flow Rate 0.5 - 4.5 m/sec (1.64 - 14.8 ft/sec) (Low ow cuto .15 m/sec; .49 ft/sec)
Calibration
Accuracy
0.5 - 4.5 m/s
(1.64-14.76 ft/sec) +/- 2% of reading
0.3 - 0.5 m/sec
(0.98 - 1.64 ft/sec) +/- (2% of reading + 0.25% of full scale)
Display Type 128x64 dot-matrix LCD
Digits 5 Digit Rate 8 Digit Total
Units
Please Note:
All meters are factory
set for gallons per
minute (GPM) rate and
acre foot total. If other
units are required, they
can be set in the eld.
Rate Volume Units Rate Time Units Total Volume Units
Gallons
Liters
Barrels (42 gallons)
Cubic Feet
Cubic Meters
Million Gallons1
Mega Liters1
Imperial Gallons
Million Imperial Gallons1
Second
Minute
Hour
Day
Gallons
Gallons x 10
Gallons x 100
Gallons x 1000
Million Gallons
Liters
Kilo Liters
Mega Liters
Barrels (42 gallons)
Cubic Meters
Cubic Meters x 1000
Cubic Feet
Cubic Feet x 1000
Million Cubic Feet
Imperial Gallons
Imperial Gallons x 1000
Million Imperial Gallons
Acre Inch
Acre Foot
Fluid Ounce
Bidirectional Forward Total, Reverse Total, Net Total, Batch Forward Total, Batch Reverse Total
Power One lithium 7.2V ‘D’ size battery pack, replaceable.
Scaled Pulse
Output
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 varies with output frequency, 150
pulses/sec max
Cable Optional Output
Cable
20ft (6m) standard length polyurethane jacketed cable—for power and outputs.
(Lengths up to 200’ (60 m) available.)
Conductivity >20 microSiemens/cm
Empty Pipe Detection Hardware/software, conductivity-based
Regulatory (EN 61326) Pending
Environmental IP67
* Specications subject to change. Please consult our website for the most current data (seametrics.com).
1Rate Time Unit is available in Day only.
2 Forward and reverse ow totals are non-resettable. Batch forward and batch reverse totals can be reset.
Kynar is a registered trademark of Arkema, Inc.
Nominal Pipe Size 4” 6” 8” 10” 12”
Low Flow Cuto GPM
Low Flow Cuto LPS
19.3
1.22
43.11
2.72
77.1
4.86
120.5
7.6
173.5
10.95
Min GPM
Min LPS
64.3
4.1
144.6
9.1
257
16.2
401.6
25.3
578.3
36.5
Max GPM
Max LPS
578
36.5
1301
82.1
2313
145.9
3614
228
5204
328.3
Upstream straight pipe is selected during initial setup. Upstream
options are 5X or 10X the diameter and are based on the amount of
straight pipe available in either new or propeller meter replacement
installation. Downstream straight pipe requirement is 2X the
diameter. See programming setup for details.
10x/5x
Pipe Diameter
2x
Pipe Diameter
FLOW

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 5 seametrics.com
Dimensions
GENERAL INFORMATION
Top of Saddle
5.48 in (13.92 cm)
5.28 in
(13.41 cm)
4.76 in
(12.09 cm)
AG90-0400 - 10.40 in (26.42 cm)
AG90-0600 - 11.14 in (28.30 cm)
AG90-0800 - 11.86 in (30.12 cm)
AG90-1000 - 12.60 in (33.73 cm)
AG90-1200 - 14.29 in (36.30 cm)
Install security clip and seal during installation
if regulations require. Security seal wire threads
through hole in security clip.
Install display security seal and captive screw
security wire during installation if regulations
require.
CAUTION: Ensure that the U-clip is installed and never remove the U-clip
retainer when the pipe is under pressure. Always remove pressure from
the pipe before you attempt to remove the meter. Removal under pressure
may result in damage or serious injury.
Saddle Size Range
4” 4.00”- 4.90”
6” 6.00”- 6.90”
8” 8.00” - 9.05”
10” 10.00” - 11.10”
12” 12.10” - 13.20”
Consult factory if your OD
does not match.
Install display security tab during installation if
regulations require.

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 6 seametrics.com
Side (3 o’clock), top (12 o’clock) installations are acceptable.
Orienting the Meter
Fitting Installation
AG90-Series meters require special saddles that ensure
that the ow sensor is installed to the correct depth. The
saddle must be installed in the pipeline before the meter
can be installed. For best results, see straight pipe and full
pipe information on pages 8 and 9.
If there is not enough straight run to smooth out the
turbulence caused by valves, ttings, and changes in
direction, some decrease in accuracy may result. This does
not mean that the ow meter’s reading is meaningless
however. In some applications (control systems, valve
operation, chemical addition) a repeatable reading may
be more important than a highly accurate one.
Upstream straight pipe is selected during initial setup.
Upstream options are 5X or 10X the diameter and
are based on the amount of straight pipe available in
either new or propeller meter replacement installation.
Downstream straight pipe requirement is 2X the diameter.
See programming setup on page 14 for details.
.
Meter Installation
After the saddle is installed in the pipeline, the meter can
be installed in the tting. After noting the direction of the
ow arrow, press the meter into the tting as far as it will
go. Retain the meter in place by inserting the U-clip. The
pin can be installed from either side. It may be necessary
to rotate the probe back and forth slightly to start the pin
into the slots on the probe. Slide the pin in as far as it will
go.
NOTE: Install U-clip security seal if regulations require.
2X
10X/5X
GENERAL INFORMATION
Chemical Injection or Fertigation
When any magmeter, by any manufacturer, is used in a
chemical injection application (including fertigation), the
chemical injection point must be placed downstream of
the magmeter OR far enough upstream for complete
mixing to occur before the uid reaches the meter. When
unmixed chemical or fertilizer alternates with water passing
through the meter, the rapid changes in conductivity may
cause sudden spikes and drops in the meter’s reading,
resulting in inaccurate measurement. The magmeter will
restabilize, however, with a steady ow of uid of uniform
conductivity.
Caution: In chemical injection or
fertigation applications, install chemical
injection point downstream of magmeter,
or far enough upstream to allow complete
mixing of uids before the meter.
FLOW
Flow Straightening Vanes/Conditioners
1. If you have the bolt-in, 3-vane style they may be removed
or left in place. They do not aect performance.
2. If you have the 6-vane, bolt-in style with a cone, it should
be removed.
3. For 6-vane, weld-in style installed in a spool, turn the
spool 180° and reinstall with the vanes behind the meter.
4. Orice, tube or Vortab style conditioners will not aect
performance.

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 7 seametrics.com
New Installation
1. Clean the mounting surface, remov-
ing any roughness which would prevent
the gasket from sealing. Place gasket
centered over pipe opening.
2. Place saddle top over gasket.
1st
4th
3rd
2nd
4. Place the saddle clamps under the
pipe and align with the clamp guides
on the saddle top.
6. Insert the AG90 sensor into the saddle
tting and secure with mounting clip or
attach security clip and seals if required.
5. Place saddle plates over saddle
clamp threads. Attach nuts and
tighten as shown below. Torque to
75 ft-lb in cross pattern.
BEFORE INSTALLING measure & record inside diameter (ID) of pipe.
BEFORE INSTALLING measure & record inside diameter (ID) of pipe.
NOTE: Gasket will extend
outside of a 4” pipe
saddle’s sides.
1. Clean the mounting surface, remove
any roughness from the area and cut a
1.75” hole into pipe. Place gasket centered
over pipe opening.
2. Place saddle top over gasket. 3. Make sure saddle top covers entire gasket.
1st
4th
3rd
2nd
NOTE: Gasket will extend
outside of a 4” pipe
saddle’s sides.
5. Place saddle plates over saddle
clamp threads. Attach nuts and
tighten as shown below. Torque to 75
ft-lb in cross pattern.
6. Insert the AG90 sensor into the saddle
tting and secure with mounting clip or
attach security clip and seals if required.
4. Place the saddle clamps under the
pipe and align with the clamp guides
on the saddle top.
3. Make sure saddle top covers entire gasket.
Propeller Replacement Installation

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 8 seametrics.com
INSTALLATION
Straight Pipe Recommendations (X = diameter)
Better Installation
Allows air to bleed o
Upstream straight pipe is selected during initial setup. Upstream options are 5X or 10X the diameter and are based on the amount of straight pipe available
in either new or propeller meter replacement installation. Downstream straight pipe requirement is 2X the diameter. See programming setup for details.
Two Elbows In Plane
2X
10X/5X
Full Pipe Recommendations
Possible Problem
Can create air pocket at sensor
For All Installations. Although not necessarily required in
every circumstance, to aid with the reduction of electrical
noise, static, and induced or transient voltages, every AG90
installation will benet by connecting the ground lug of the
meter to a 5/8” x 8’ independent ground rod dedicated to the
meter using at least a 10 GA ground wire.
Electronically Noisy Installations. When the AG90 is
installed in an electrically noisy system, such as near a VFD
etc. an independent ground rod is always recommended to
help with the reduction of the electrical noise and to help
protect against any large electrical spikes. In electrical noisy
installations, always conrm the rest of the equipment is also
well grounded. Do not connect VFD ground rods to any other
equipment.
Equalization Lug
Ground Clamp
(Exothermically weld when
corrosion is a concern)
8’ Ground Rod
Earth
#6, #8, or #10 AWG Stranded
Copper Ground Wire
Grounding

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 9 seametrics.com
INSTALLATION
Full Pipe Recommendations
Better InstallationPossible Problem
Air can be trapped Allows air to bleed o
Better InstallationPossible Problem
Allows air pockets to form at sensor Ensures full pipe
Post-valve cavitation can create air pocket Keeps pipe full at sensor
Better InstallationPossible Problem

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 10 seametrics.com
CONNECTIONS
AG90 General Cable Information
The AG90 meter has one cable connector. The cable contains the wires for scaled pulse output and external
DC power. See Sample Cable Wiring Diagrams and Wiring Table.
The AG90 is available as a Battery powered meter
Power/Output Cable
Battery Version with no external pulse output
No wiring is needed.

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 11 seametrics.com
CONNECTIONS
AG90 Wiring Diagrams
AG90 Cable Wiring Table
(C1 = Power/Output Cable 1)
PIN 1 PULSE SCLD - 2 PULSE SCLD + PWR - PWR +
Battery
Powered
Meter
WHITE
C1
GREEN
C1 NOT USED
Externally
Powered
Meter
WHITE
C1
GREEN
C1
BLACK
C1
RED
C1
If not using external output or powering externally, no cable is required.
Red (P1) DC+
Black (P2) DC-
Green (P3) Pulse +
White (P4) Pulse -
DC/Battery Power with Pulse Output

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 12 seametrics.com
CONFIGURATION
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.
Pulse Output Conguration. A pulse output is standard
on all models. 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. 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.
The pulse output rate in volume units/pulse can be set by
the user via the SETP tab on the meter’s setup menus.
Because the pulse output of an AG90 meter is set by the
user, care must be taken to assure the output pulses do not
exceed the maximum frequency of the meter while also
ensuring a reasonable resolution.
K-factor: Remember that SETP is expressed in units totaled
per output pulse (G/P if using gallons) while K-factors
are expressed in pulses per gallon (P/G.) To determine
K-factor from SETP, divide 1 by SETP (if SETP is expressed in
gallons.) Conversely, 1 divided by the K-factor equals SETP
AG90 battery powered units have a maximum output
frequency of 150 Hz.
Because all pulse outputs (SETP) are congured in (rate)
units totaled per pulse, all sizes of meters can be congured
with the same SETP values
For example, if your rate is chosen as gallons per minute
(GPM) the table below applies. If your rate is dierent,
simply use your rate label in place of (GPM.) The numerical
values will remain the same.
SETP
Flow Rate at 1 Hz
(GPM)
Flow Rate at 150 Hz
(GPM) Battery Powered
Meters
0.1 6 900
0.2 12 1800
0.3 18 2700
0.4 24 3600
0.5 30 4500
0.6 36 5400
0.7 42 6300
0.8 48 7200
0.9 54 8100
1.0 60 9000
Lower frequency output pulses (1 pulse for some particular
number of gallons) can also be set.
Any output frequency can be determined by:
Rate (units/minute) ÷ SETP (units/pulse) = pulse/minute
Hz = pulse/minute ÷ 60 seconds / minutes
Pulse Units. The units of measure of SETP are independently
selectable and are not tied to rate or total. Upon change of the
SETP unit, the pulse output may take up to 10 seconds, or the
duration of one pulse (whichever is longer) to take eect.
If Pulse Output is Inconsistent. The DAMP lter may need
to be increased.
Pulse Width Timing. The unit and value of SETP must be
chosen to keep the duration between meter pulse outputs to
less than 500 seconds.
Pulse Timing in Battery Powered Units. The output pulse
width in battery powered units is short and varies with pulse
frequency. (See table)
Output Pulse Width of Battery Powered Units
Output Pulse Frequency
Output Pulse Width as a Percentage of
the Pulse Period
(Pulse period = 1000 milliseconds/fre-
quency)
Zero to 1 Hz Multiply the pulse
period by 0.01
= Output Pulse
Width (ms)
>1 to 20 Hz Multiply the pulse
period by 0.05
= Output Pulse
Width (ms)
>20 to 100 Hz Multiply the pulse
period by 0.1
= Output Pulse
Width (ms)
>100 to 150 Hz Multiply the pulse
period by 0.15
= Output Pulse
Width (ms)
Example: If frequency = 20 Hz then the pulse period = 50 milliseconds and pulse
width = (.05 x 50 milliseconds) = 2.5 ms

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 13 seametrics.com
OPERATION
Minimum Flow
As with any other ow sensor, there is a rate below which
the AG90-Series sensor cannot read. Check the table below
(also on page 4) for the minimum ow rate detectable by
the sensor for a given pipe size.
Filtering
The software of the AG90-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 after 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 wipe o the electrodes (three silver
bumps) on the reading face of the ow sensor. A mild soap
(dish washing liquid for example) can be used to aid the
cleaning process.
Standard Menu Options
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 # of
sample periods for
rolling average.*
(0=1 sample period,
1=2 sample periods, etc.)
T UNIT R UNIT SET P DAMP
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET P DAMP
EXIT
FLOW RATE = GALLONS/MIN
PRESS + TO SET RATE
UNITS FOR DISPLAY
T UNIT R UNIT SET P DAMP
EXIT
00001.0 GALLONS
PRESS + TO SET
GALLONS TOTALIZED PER
PULSE SENT OUT PULSE1
T UNIT R UNIT SET P DAMP
EXIT
DAMPING = 1
PRESS + TO SET
DAMPING VALUE
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 ve times, you will be redirected
to a SUBMENU screen from which you can access several
more options.
Navigation in this SUBMENU is the same as for the MAIN
MENU. Whenever you wish, go to the EXIT tab in the
SUBMENU and perform the hold and tap sequence to
return to the MAIN MENU.
INFO: Meter model number, serial number, and
rmware version.
SAMP: Sample rate.
SETUP: View or change pipe settings.
EXIT: Return to MAIN MENU.
Sub-Menu - Battery Only Version
* See DAMP Settings for Battery Units on page 16.
Special SUBMENU for Further Options
INFO COMM MBID FL DIR
SAMP HPOLL SETUP EXITSAMP
PRESS + TO VIEW INFO
ABOUT METER
Nominal Pipe Size 4” 6” 8” 10” 12”
Low Flow Cuto GPM
Low Flow Cuto LPS
19.3
1.22
43.11
2.72
77.1
4.86
120.5
7.6
173.5
10.95
Min GPM
Min LPS
64.3
4.1
144.6
9.1
257
16.2
401.6
25.3
578.3
36.5
Max GPM
Max LPS
578
36.5
1301
82.1
2313
145.9
3614
228
5204
328.3

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 14 seametrics.com
OPERATION
When you remove the meter from the box, it will prompt
you to perform initial SETUP of ID, Hole and PIPE before
you can proceed to other menu functions or return to the
HOME screen.
SETUP Menu Functionality
The SETUP menu works slightly dierent than other menus
inside the AG90. The black square highlighting the left
most text is similar to a cursor on a computer. It lets you
know where you are within the menu. Press Up 1x and the
menu category will change. The categories are as follows:
ID (Internal Diameter in inches)
HOLE (Hole Size Cut into Pipe for Inserting Meter)
PIPE (Piping Conguration Selection)
ID
The Internal Diameter (or I.D.) of the Pipe in which the AG90
is installed is critical to the meter’s performance. The AG90
senses a local velocity around the electrodes and uses that
information to extrapolate the ow over the entire pipe
section. The ID is also used ‘under the hood’ to scale many
critical values such as Low Flow Cuto, Max Flow Rate, etc.
The installer should measure the ID in the most accurate
way possible prior to saddle installation.
HOLE
SMALL
New Installations will cut a 1.75” hole into the pipe. This is
considered a “SMALL” hole. In this type of installation, the
meter is ush to the diameter of the hole. This represents
an ideal installation condition, because the cross-sectional
area at the measurement point is equal to the I.D. of the
pipe.
LARGE
Retrot installations already have a hole cut into the pipe.
Typically they are quite large (especially when replacing
mechanical meters), although the exact size depends on
the pipe size. These are considered “LARGE” holes. In this
type of installation, the meter has signicant room between
it and the hole cut into the pipe. When water ows by the
meter, it lls this extra cross sectional area while owing
past the measurement point. This means that unlike the
“SMALL” hole case, the cross sectional area at the point
of measurement is not equal to the I.D. of the pipe. When
this menu is selected, the AG90 will compensate for this
condition.
PIPE
The PIPE menu is used to compensate for altered velocity
proles in various piping congurations. When obstructions
or disturbances are introduced to straight pipe (particularly
upstream of the meter), the velocity prole changes shape.
Since the AG90 measures a relatively small cross section of
the velocity prole, large distortions of this prole can lead
directly to measurement error. The pipe menu has distinct
pipe conguration compensation built into the AG90
allowing you to select the closest condition to your actual
pipe and allows the AG90 to operate at peak performance.
STRAIGHT
Straight Pipe is a relative term. For this conguration, the
AG90 considers the pipe to be straight if there are 15+
diameters of straight pipe upstream from the meter and
at least 2 diameters downstream from the meter from any
obstruction in the pipe.
10/2 ELB
This selection represents an install condition in which there
exists a single in plane elbow 10 diameters upstream from
the meter and 2 diameters downstream from the meter.
5/2 ELB
This selection represents an install condition in which there
exists a single in plane elbow 5 diameters upstream from
the meter and 2 diameters downstream from the meter.
ADJ
The adjustment menu is for installers and regulating
bodies. This menu allows manual adjustment of the rate
(on a % of reading basis) in installations outside of the
scope of this document. This menu should be used when
a known reference is temporarily (or otherwise) installed
into the system and adjustment can be made with high
condence and reliability.
Initial Setup
INITIAL SETUP OF ID, HOLE, AND PIPE IS
REQUIRED FOR THE METER TO OPERATE
PROPERLY.
You must change setting from the default N/A to one of the following:
You must change setting from the default N/A to one of the following:

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 15 seametrics.com
OPERATION
Changing Flow Meter Settings
Home Screen and General Navigation
The HOME Screen displays 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.
These two buttons are light sensors which can detect
when a nger is covering them and operate upon release.
Only three button touch actions are needed to control
navigation through the menus, settings changes and back
to the home screen.
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20 SET F
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET FEXIT
TOTAL:
PRESS TO CHANGE
GALLONS
FORWARD TOTAL
Making Selections
Once in the Menu System, move from tab to
tab by tapping the right button. (See the next
page for details on the various available tabs.)
Select the Parameter. In the screen for
the highlighted tab you will see the current
parameter value for that tab. Tapping the right
button, move to the tab for the parameter you
want to change.
In this example, the rst line indicates that the
current unit for the TOTAL is GALLONS. The
next two lines 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 screen to change the setting.
Scroll Through Setting. Select the new
setting by scrolling through a list of selections
by tapping the left button to nd a dierent
TOTAL unit.
Accept Changes. To accept any changes
you have made, perform the hold and tap
sequence.
When Finished Making Changes. When you
are nished making changes, move to the EXIT
tab using the right button.
To return to the HOME screen, perform the
hold and tap sequence.
TAP
TAP
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20 SET F
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET FEXIT
TOTAL:
PRESS TO CHANGE
GALLONS
FORWARD TOTAL
+
HOLD TAP
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20 SET F
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET FEXIT
TOTAL:
PRESS TO CHANGE
GALLONS
FORWARD TOTAL
TAP
+
HOLD TAP
TAP
+
HOLD TAP
HORIZONTAL SCROLLING:
Tap right button to scroll horizontally through
menu tabs or move horizontally within a tab
dialog when applicable.
VERTICAL SCROLLING:
Tap left button to change a highlighted item
within a tab dialog.
SELECT/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.
On the Main screen, hold and tap 7 times
to scroll through the total direction options.
Release to select a total direction.
Once BATCH FORWARD or BATCH REVERSE is
selcted, tap four times to reset batch totalizer.
To Enter the Menu System perform the hold
and tap sequence. The Passcode entry screen
will display. The default passcode is 000000. If a
dierent passcode has previously been set, use
the and to enter that passcode. In either
case, hold and tap again to move into the menu
system. (If you enter the wrong passcode, hold
and tap again to return to the previous screen.
See page 16 for information on how to change a
passcode.)
TAP
TAP
+
HOLD TAP
000000
ENTER PASSCODE
PRESS AND TO CHANGE
+
HOLD TAP
Changing Total Direction/Resetting Batch Totalizers

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 16 seametrics.com
OPERATION
To prevent tampering or changes to the program, after initial
set-up, either enter a security pass-code, or remove the display
lid and place a security tab over one of the arrows before
installing the housing security seal.
Placing a security tab over either display button will prevent
additional changes to the program, while allowing someone
to wake the display from sleep mode. Placement over the
right button will also allow scrolling through the ow direction
feature. Placement over the left button will prevent changes to
the ow direction. In either position, non-resettable totals will
not be aected.
The AG90 has a passcode system for restricting access to the
menus. The AG90 comes from the factory with the passcode
set to 000000. When a user attempts to enter the menu system
(see details on page 14), the passcode entry screen will be
displayed.
The default passcode is 000000. If a dierent passcode has
previously been set, then the user must enter that passcode at
this time. After entering the passcode, or leaving it at 000000
if using the default passcode, the user does the hold and tap
sequence to move into the menu system.
To change the passcode, you must use the THIRD MENU
screen. Access the THIRD MENU screen as follows:
• Enter the main menu system, as described above.
On the main menu, tab over to the EXIT tab and tap the up
arrow ve times. A SUBMENU screen will display.
• On the SUBMENU screen tab over to the EXIT tab and
tap the up arrow ve times. The THIRD MENU screen
will display.
• To set the code, hold and tap SETCD and then use the
and to enter the new code.
000000
ENTER PASSCODE
PRESS AND TO CHANGE
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL:
PRESS TO CHANGE
GALLONS
0.0000000
SET ID
TOTAL
ACRE
FEET
RATE
GPM
OK
FORWARD TOTALFORWARD TOTAL
SETCD
PRESS + TO SET
SAMP FOUT EXIT
000000
PASSCODE
SETD PDAMP TEST
Programming Passcode and Tamper Prevention • Hold and tap again to return to the THIRD MENU screen.
• Tab to EXIT, and then hold and tap to return to the
SUBMENU.
To change the number of decimal places in the total
• To set the decimal point, hold and tap on SETD and then
use the to move the decimal point.
• Hold and tap again to return to the THIRD MENU screen.
• Tab to EXIT, and then hold and tap to return to the
SUBMENU.
A power indicator is displayed in the lower left of the main
display window.
Any meter powered from an external power source will
display a power plug icon when running on external power.
If the connection to external power is lost, the meter will
switch to the backup battery and the power icon will switch
to a battery symbol.
OK on the battery indicator means battery voltage is above
6.4 volts.
LO on the battery indicator means the battery is low and
should be replaced soon.
PDAMP
PDAMP is used to view or change the number of samples
for rolling average of pulse output.
Power Indicators
INFO COMM MBID FL DIR
SAMP
SAMP SETUP EXIT
PRESS + TO VIEW INFO
ABOUT METER
OK
LO
P
OK
LO
Being powered by external
DC or AC
Being powered by battery -
voltage is sucient
Being powered by battery -
voltage is low
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL:
PRESS TO CHANGE
GALLONS
0.0000000
SET ID
TOTAL
ACRE
FEET
RATE
GPM
OK
FORWARD TOTA
LFORWARD TOTAL
P
If display reads, ‘BATT END’
replace battery
immediately.

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 17 seametrics.com
TEST
TEST allows the user to initiate a fully functional, articial
ow rate for the purpose of testing other connected
equipment. When TEST is applied, all features of the
meter will function at the stated ow rate (in gallons per
second).
For TEST to function, the meter must be lled (not EMPTY
PIPE).
To enter a value into the TEST feature, navigate to the
TEST tab and enter a ow rate value in the VAL screen (in
gallons per second only,) then to the VAL box and
to the ON screen. This will initiate the TEST feature. The
next would bring you to the OFF screen, but you can
‘hold and tap’ the arrows to return you to the sub menu
while the feature operates.
After use, the TEST feature must be turned OFF. If the
TEST feature is not turned OFF, the stated static ow rate
(in gallons per second) will be shown any time the meter is
full or in a owing condition. Flow values recorded by the
meter while the TEST feature is operating are permanently
recorded in the displayed TOTAL. It may be useful to note
that these values are only written to permanent memory
every 15 minutes and cycling all power within this 15
minute time frame will return the meter to its previous
total.
To ‘wake up’ a battery powered meter, you may need to
hold the up arrow for 2 seconds and release.
The AG90 meter comes congured with a 7.2V ‘D’ size
lithium battery pack. In this conguration, the only option/
output is the scaled pulse output which comes standard.
Be sure to set your SETP value such that the meter will
function properly over the ow range in your application
(see page 12 for details). The sample rate of the meter is
user selectable through the SAMP tab in the meter’s sub-
menu. Sample periods of 1/5, 1/3, 1, 3, 5, 15, 30, and 60
seconds can be selected. (A sample period of 15 seconds
- 5.5 year battery life - is the default.)
Larger sample periods will yield longer battery life but
slower response time. Care must be taken to select a
sample period that is suitable for your application. See the
table below for the expected battery life as a function of
sample period.
DAMP/Filtering
The DAMP Filter allows multiple readings to be averaged
OPERATION
Battery Life/Sample Period
Sensor sample period(s)
(Seconds)
Expected battery life*
1/5 (0.2) 4.5 Months
1/3 (0.33) 7 Months
1 1.5 years
3 3.25 years
5 4 years
15 5.5 years
30 6 years
60 6.25 years
*Based on 85% battery capacity at room temperature.
over time, thus reducing the meters sensitivity to minor
changes in ow rate. The DAMP Filter is extremely useful for
situations where the ow is not perfectly steady (pulsating
ows, turbulent ows, etc.)
The DAMP Filter works dierently depending on the SAMP
selection:
SAMP < 1 second
When the SAMP setting is less than 1 second, the DAMP
lter is dened on a “per second” basis. The DAMP lter
always utilizes at least 1 second of data for its lter. Then,
it adds however many seconds you’ve selected in the
DAMP menu setting to that 1 second of data. For instance,
if you set the DAMP menu to 7, your AG90 meter will
utilize 7+1=8 seconds of data within the lter. This means
that the lter will average readings for 8 seconds prior to
displaying a reading. After the rst reading is displayed,
the lter kicks out the oldest 1 second of data, adds the
newest 1 second of data, recomputes the average ow
rate, and displays it to the screen/output. In this way, it is
considered a “running average”.
SAMP > 1 second
When the SAMP menu is set to a number greater than
1 second, the DAMP menu is dened on a “per reading”
basis. Again, the DAMP lter must always use at least 1
reading to generate a ow rate, so the lter will add 1 to
your selection. For instance, if SAMP is set to 15, and DAMP
is set to 7, the DAMP lter will utilize 7+1=8 readings worth
of data for the lter. This means that the lter will not be
full for 15x8=120 seconds. Note that in most long term
applications, these long lters may be ne, but in shorter
term applications, the DAMP and SAMP menus need to be
adjusted accordingly.
Battery Powered Units

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 18 seametrics.com
TROUBLESHOOTING & ERROR MESSAGES
Problem Probable Causes Things to try…
Blank Display Battery has not been plugged in
Dead battery
Plug in the battery
Replace battery
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
Pipe not full Provide back pressure or other means to ensure
pipe is lled
Pulsing ow due to combining multiple
upstream ow sources
Move connection point further upstream
Insucient mixing of upstream chemicals Move chemical injection downstream from meter
Low uid conductivity < 20 µS/cm Replace with dierent type of meter
Noisy electrical environment
• Shared grounds
• Too close to VFD
• Faulty or poor power supply
• Cable length
• Shared conduit
• Unshielded cable
Improve grounding at meter and nearby
potentially noisy electrical equipment. Increase
distance between meter and electrical noise
sources.
Try power reset
Flow Rate appears correct but
pulse/ frequency output is low,
erratic or absent
External device input impedance too low
Cable too long
Use sourcing rather than sinking interface
connection
Reduce interface pull-up resistance
Flow Rate appears correct
but pulse/frequency output is
erratic and/or too high
Electrical noise sources interfering with
pulse frequency signal
Isolate, remove or reduce noise sources. Move
meter control cable away from noise sources.
Wrong type of cable Use only twisted pair cable and ensure both signal
wires are on same twisted pair
Grounding problem Improve or try dierent grounding method
Flow rate steadily reads
zero when there is ow
Pipe ID not set
Flow is below cutoff (very low)
Air in the pipe
Program ID of pipe
Reading will resume when ow increases
Reposition meter for full pipe
Flow rate intermittently
drops when there is ow
Air in the pipe Reposition meter for full pipe
Jumpy reading Improperly grounded
Pulsing ow
Check for proper grounding
Increase DAMP value
Use external power source
(allows more ow averaging)
Try power reset
Troubleshooting

AG90-SERIES INSTRUCTIONS
Seametrics • 253.872.0284 Page 19 seametrics.com
TROUBLESHOOTING & ERROR MESSAGES
Message Description Notes
INIT Initialization is occurring during power up.
EMPTY PIPE Fluid is not detected between the sensing electrodes.
LO in battery icon Battery is getting low, replace soon. Meter still functions. Above 6.4V, OK appears in icon
BATT END Battery is very low (approx. 6.1V). Totalizer stops updating.
COIL FAIL Coil current too high or too low (short or open).
COMM FAIL Communication between transmitter and sensor board fails.
OVER RANGE Rate exceeds number of digits that can be displayed. Adjust units.
SET ID Pipe ID has not been set.
SET HOLE Installation hole type (small, large) has not been set.
SET PIPE Pipe setting has not been selected.
INIT FAIL Initialization has failed. Ribbon cable plugged in AFTER power, or
there is no communication between transmitter & sensor board.
Try power reset
Error Messages
Under certain conditions an error message may be displayed.

Seametrics • 19026 72nd Avenue South • Kent, Washington 98032 • USA
(P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • seametrics.com LT-14699r1.2 20230628
6/28/2023
SEAMETRICS LIMITED WARRANTY
The limited warranty set forth below is given by Seametrics, with respect to Seametrics brand products purchased in the United
States of America.
Seametrics warrants that products manufactured by Seametrics, when delivered to you in new condition in their original containers
and properly installed, shall be free from defects in material and workmanship.
Seametrics products are warranted against defects
for a minimum period of two (2) years from date of installation, unless otherwise specied, with proof of install date. If no
proof of install date can be provided, warranty period will be two (2) years from date of shipment from Seametrics, as dened
on Seametrics’ invoice.
Seametrics’ obligation under this warranty shall be limited to replacing or repairing the part or parts, or, at
Seametrics’ option, the products, which prove defective in material or workmanship. The following are the terms of Seametrics’ limited
warranty:
a. Buyer must give Seametrics prompt notice of any defect or failure and satisfactory proof thereof.
b. Any defective part or parts must be returned to Seametrics’ factory or to an authorized service center for inspection.
c. Buyer will prepay all freight charges to return any products to Seametrics’ factory, or another repair facility. as designated by
Seametrics.
d. Defective products, or parts thereof, which are returned to Seametrics and proved to be defective upon inspection, will be repaired
to factory specications.
e. Seametrics will deliver repaired products or replacements for defective products to the buyer (ground freight prepaid) to the
destination provided in the original order.
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cases:
i. Loss of or damage to Seametrics product due to abuse, mishandling, or improper packaging by buyer
ii. Failure to follow operating, maintenance, or environmental instructions prescribed in Seametrics’ instruction manual
iii. Products not used for their intended purpose
iv. Alterations to the product, purposeful or accidental
v. Electrical current uctuations
vi. Corrosion due to aggressive materials not approved for your specic product
vii. Mishandling, or misapplication of Seametrics products
viii. Products or parts that are typically consumed during normal operation
ix. Use of parts or supplies (other than those sold by Seametrics) which cause damage to the products, or cause abnormally
frequent service calls or service problems
h. A new warranty period will be established for repaired products, or products replaced during the original warranty period.
i. In the event that equipment is altered or repaired by the buyer without prior written approval by Seametrics, all warranties are void.
Damage caused by equipment or accessories not manufactured by Seametrics may void the product’s warranty.
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and conditions:
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ii. All title and intellectual rights to the software are owned by Seametrics.
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