Seametrics AG2000 User manual

The Leader in Flow Meter Value
FEATURES
Welded steel epoxy-coated flow tube
Flanges, ANSI 150 lb. drilling
Cross-drilled screws (2) for tamper-evidence
Power/Output cable port access,
Tamper-sealed
Rate and total indicator
316SS electrodes
INSTRUCTIONS
AG2000 Irrigation Magmeter
Equalization lug
Tamper-evident security seal
Powder-coated diecast-aluminum electronics housing
Dual durometer rubber liner

Page 2
INSTALLATION
Tamper-Evident Seal. The battery-powered AG2000 has a seal
wire to protect against unauthorized access. The seal can be
broken to change units of measure, replace the battery pack,
or to field-install a power/output cable (see page 4). CAUTION:
If water usage regulation is in effect, only a person authorized
by your regulatory agency should break the seal wire, and
replace it when finished.
Positioning the Meter. These meters can be installed
horizontally, vertically, and in any radial position. If sludge
accumulation is possible, vertical or horizontal placement with
the register at a 45˚ angle may be preferred.
Full Pipe Recommendations. All magmeters require a method
for determining that the pipe is empty, to prevent false reading.
This meter is designed to go to zero reading if one or more
electrodes is exposed. For highest accuracy, install the meter
so that the pipe will be full when there is flow. If air bubbles
may be present in the pipe, rotate the meter by one flange hole
to position the control housing at a 45˚ angle. See mounting
diagrams below.
Possible Problem: Air pockets,
accuracy loss, empty pipe reading
Better Installation: Keeps pipe full
at sensor for accuracy
Possible Problem: Air can be
trapped, loss of accuracy
Better Installation: Allows air
to bleed off, higher accuracy
Straight Pipe Recommendations. See the diagrams below
for manufacturers’ recommendations. NOTE: Local regulations
may vary. Confirm before installing to assure compliance.
2X
1X
2X
1X
pipe size pipe size
pipe size pipe size
Elbows
Reduced Pipe
(not recommended)
Expanded Pipe
Not Recommended: Vertical
downow, open discharge
Possible Problem:
Air bubbles and sediment on the
electrodes can affect accuracy.
Better Installation:
Improved accuracy results from
unimpeded electrodes.
Electrode
moved from
top by rotating
meter
Intermittent air
bubbles
miss electrode
Intermittent air
bubbles
pass over
electrode
Possible
sediment
build-up Electrodes free
from sediment
build-up
Minimum Maximum
4” 12 gal/min 500 gal/min
(.75 liter/sec) (31 liter/sec)
6” 32 gal/min 1,200 gal/min
(2 liter/sec) (76 liter/sec)
8” 60 gal/min 2,200 gal/min
(4 liter/sec) (139 liter/sec)
10” 95 gal/min 3,500 gal/min
(6 liter/sec) (220 liter/sec)
FLOW RANGE
Fittings and Flanges. The AG2000 flanges have standard ANSI
150 lb. drilling, and should match up with any other ANSI 150
lb. flange. IMPORTANT: Piping protruding beyond welded-on
flange faces may damage meter sealing surfaces.
Temperature. These flow sensors are recommended for
operating temperatures of 10˚ to 130˚ F (-12˚ to 54˚ C) and
non-operating temperatures of -40˚ to 158˚ F (-40˚ to 70˚ C).
Calibration. The AG2000 is factory calibrated and cannot be
recalibrated in the field.
Protecting the Meter. A weather guard is recommended
(SeaMetrics part #31388) for environmental protection.
Chemigation Applications. Magmeters in chemigation ap-
plications must be placed either upstream of the chemical
injection line, or far enough downstream for complete mix-
ing to occur before the solution reaches the meter. Proper
placement prevents spikes and drops in readings that re-
sult when fluids of different conductivity pass through the
meter. For more information, refer to the technical bulletin
on the SeaMetrics website Downloads page.
Better Installation: Vertical
upow with full pipe

Page 3
POWER SUPPLY and OUTPUTS
Battery Power (standard). The AG2000 is powered by
a non-rechargeable batter y pack with a lifespan of up to
5 years under typical use. Actual lifespan will vary from
application to application, depending on the duty cycle.
“Low Batt” will display when it is time to replace the battery
(see illustration at right). Replacement instructions come
with the custom battery pack available from your dealer or
SeaMetrics.
NOTE: Memory will not be lost during a battery change.
External Power (optional). Where power is available, the
life of the battery pack can be indefinitely extended by the
addition of an external power input cable. When external
power is used, the batteries serve as backup in case of
power failure, keeping the meter reading out during an
outage. The display reads “P” to indicate that external
power is in use (see illustration at right).
When the display is reading numbers/letters but neither
the “Low Batt” or “P” symbol is displayed, the meter is
functioning normally under battery power (see illustration
at right). When the display is completely blank, the meter
is not powered.
Solar Power (optional). In most areas of the US, a 12-
volt, 5 watt solar power unit (panel, charge controller and
battery) should suffice to operate the meter. In this case,
the internal batteries will ser ve as backup and battery life
will be conserved.
Low
Batt
Low Battery Indicator
External Power Indicator
Battery Power
Display Reading. There are two lines to the display, the
bottom line for flow rate and the top line for accumulated
total. Measurement units are pre-ordered and factory-set
and can be changed in the field only by an authorized
individual.
Empty Pipe
No Power
Meter Installed Backwards
Equalization Diagram
Equalization Lug
Meter
Flange Pipe
Flange
Bolt
Run wire from equalization lug to both pipe flanges; secure
flange plates under bolt heads as shown.
Metal Pipe Installations. To equalize the electric potential
of the fluid, the meter, and the surrounding pipe, secure the
flange plates, factory-installed on equalization lug, to both
pipe flanges at one of the bolt holes. Be sure the lockwasher
provided fits between the pipe flange and the flange plate.
Meter Flange
Pipe Flange
Flange Plate
Lockwasher
Meter Equalization Lug
Plastic Pipe Plastic Pipe
#6 AWG Stranded
Copper Ground Wire
Ground Clamp
8’ Ground Rod
Earth
Exothermically weld when
corrosion is a concern
WARNING: ELECTRICAL SHOCK HAZARD
When the AG2000 is installed in a plastic
piping system, or when externally powered,
it is very important to ground the meter to
avoid electrical shock hazard. Failure to do so can result
in electrocution.
Plastic Pipe Installations. In plastic pipe it is not nec-
essary to use the equalization straps, but the meter
must be grounded to avoid electrical shock and electro-
static interference with meter function.
EQUALIZATION and GROUNDING
Metal Pipe
Metal Pipe

LT-13318-G
3/19/09
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
Problem Probable Cause Try...
Blank display
Flow rate steadily reads
zero when there is flow
Display reads [ - ]
Flow rate intermittently
drops when there is flow
Jumpy reading
Replace battery pack
Reading will resume when flow increases
Reposition meter for full pipe
Note flow direction arrow, reverse meter
Reposition meter for full pipe or rotate to
avoid bubbles
Check for proper equalization
Use external power source
(allows more flow averaging)
Install chemigation line downstream of meter
(or enough upstream for thorough mixing of
fluids before meter)
Dead battery
Flow is below cutoff (very low)
There is air in the meter
Meter is installed backward
There is air in the meter
Improperly equalized
Pulsing flow
Rapidly changing conductivity
(chemigation applications)
TROUBLESHOOTING
Serial Output Only
When Preconfigured
for Custom Telemetry
Applications
External Power
Pulse Output
AG2000 Cable
Blue
Orange
Black (-)
Red (+)
Shielded
Direct Burial Cable
22 AWG Stranded
White (-)
Green (+)
Drain Wire
Optional Input/Output Cable
Factory or Field Installed
Flow
800.975.8153
Orange and Blue: Serial Output (Technician Use Only)
Green (+) and White (-): Pulse Output, 30 Vdc max, 10 mA max
Red (+) and Black (-): External Power, 7-26 Vdc at 30 mA max
Drain: Connect to earth ground (See WARNING)
WARNING: Using an unregulated power
supply >18 Vdc may damage the meter
due to AC line input voltage fluctuation.
Optional Input and Outputs. An optional cable, factory-
installed or field-installed by an authorized individual,
provides power input, pulse output (for remote reading,
4-20 mA conversion, telemetry and data logging functions),
and serial output (when preconfigured for technician use in
custom telemetry applications). See diagram below. The
factory-default pulse output rate is 10 gallons per pulse.
Detailed wiring diagrams provided with cable.
IMPORTANT: When field installing the input/output cable,
be sure to snugly tighten the cable strain relief to prevent
water ingress.
OPTIONAL INPUTS, OUTPUTS and TROUBLESHOOTING