GF FlowtraMag GF 2581 User manual

*3-2581.090*
3-2581.090 Rev 7 09/23
GF 2581 FlowtraMag®Meter
English
Operating Instructions
Description
Table of Contents
Patent #: US 10,712,184 B1
Other U.S. and International Patents Pending
The GF 2581 FlowtraMag is a full-bore plastic PVC in-line style magnetic owmeter. The
PVC body with Titanium or Hastelloy®C electrodes has no moving parts and is two to
three times lighter in weight compared to traditional metal magmeters on the market. It is
designed for high accuracy ow measurement in short pipe runs, making it an ideal solution
for industrial applications where performance and ease of use are important.
The FlowtraMag is available in pipe sizes of DN25 (1 in.), DN40 (1.5 in.), DN50 (2 in.),
DN80 (3 in.) and DN100 (4 in.), optimized for performance in short pipe runs often
associated with nal e󰀪uent lines, well heads and water treatment skids.
Features include:
• No moving parts
• No pressure drop
• Lighter in weight compared to traditional metal magmeters
• Reduced straight run requirements, ideal for nal e󰀪uent lines, well heads and skids
• Factory calibrated with certicate (±1% of reading accuracy)
• Partially lled pipe detection status indicator
• Visual LED indicators make sensor status clear and easy to read
• Reverse ow direction congurable with 0252 Conguration Tool or GF Cong Tool
Bluetooth®App
• One device with three di󰀨erent outputs: eld selectable Frequency or Digital (S³L),
and analog 4 to 20 mA, in both passive and active conguration
• On-the-y conguration with GF Cong Tool Bluetooth®App
• Bluetooth® 4.2 capable, support iOS and Android for simple user conguration with
instantaneous ow reading
• English
• Deutsch
• Français
• Español
• 中文
DN25
(1 in.)
DN40
(1.5 in.)
DN50
(2 in.)
DN 80
(3 in.)
DN100
(4 in.)
Warranty Information ...............................................................................2
Safety Information ...................................................................................2
Chemical Compatibility............................................................................2
Temperature-Pressure Graph..................................................................2
Specications ..........................................................................................3
Sensor Dimensions .................................................................................4
Sensor Location.......................................................................................5
Selecting a Location ................................................................................5
Sensor Mounting Angle ...........................................................................5
Sensor Pipe Installation...........................................................................6
Wiring Conguration................................................................................8
Default Congurations.............................................................................9
Wiring ....................................................................................................10
EMI Filter Wiring....................................................................................12
App Conguration - Setup .....................................................................13
App Conguration - Monitor and Real Time Log ...................................15
App Conguration - Files.......................................................................16
App Conguration - Sensor Setup.........................................................16
Calibration .............................................................................................18
Customization and Performance Settings .............................................18
Averaging and Sensitivity Settings ........................................................19
Grounding..............................................................................................20
LED Status Indicators............................................................................20
Conguration - 0252 Conguration Tool................................................21
Troubleshooting.....................................................................................24
Ordering Information..............................................................................27
E171559
C
US
APPROVED

22581 FlowtraMag®Meter
Refer to your local Georg Fischer Sales o󰀩ce for the most
current warranty statement.
All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales o󰀩ce or distributor.
Product returned without a Service Form may not be
warranty replaced or repaired.
GF products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH bu󰀨ers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature, chemical poisoning, dry-out) or
mishandling (e.g. broken glass, damaged membrane, freezing
and/or extreme temperatures).
Chemical CompatibilityWarranty Information
Safety Information
Georg Fischer products are manufactured in a variety of wetted
materials to suit various liquids and chemicals.
All plastic materials including typical piping types (PVC) are more
or less permeable to contained media, such as water or volatile
substances, including some acids. This e󰀨ect is not related to
porosity, but purely a matter of gas di󰀨usion through the plastic.
If the plastic material is compatible with the medium according
to the application guidelines, the permeation will not damage
the plastic itself. However, if the plastic encloses other sensitive
components, as is the case with GF FlowtraMag meter, these
may be a󰀨ected or damaged by the media di󰀨using through the
plastic body.
Unit is factory shipped congured to measure water.
1. Depressurize and vent system prior to installation or removal.
2. Conrm chemical compatibility before use.
3. DO NOT exceed maximum temperature or pressure specs.
4. ALWAYS wear safety goggles or face shield during
installation and/or service.
5. DO NOT alter product construction.
6. If this equipment is used in a manner not specied by the
manufacturer, the protection provided by the equipment may
be impaired
7. This device is not approved for use or installation in
hazardous locations.
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
0.7
1.4
2.1
2.8
3.4
4.1
4.8
5.5
6.2
6.9
7.6
8.3
9.0
9.7
10.3
(bar)(psi)
0
-20 0 20 40 60 80 100
°F
°C
-4 32 68 104 140 176 212
DN25 (1”)
DN40 (1.5”)
DN50 (2”)
DN80 (3”)
DN100(4”)
@ 3,5 bar
(51 psi)
@ 2,27 bar
(33 psi)
Operating Pressure/Temperature Graph
Caution / Warning / Danger
Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death
Electrocution Danger
Alerts user to risk of potential of injury or death via
electrocution.
Electrostatic Discharge (ESD)
Alerts user to risk of potential damage to product by ESD. .
Personal Protective Equipment (PPE)
Always utilize the most appropriate PPE during
installation and service of GF products.
Pressurized System Warning
Sensor may be under pressure, take caution to vent
system prior to installation or removal. Failure to do so
may result in equipment damage and/or serious injury.
Hand tighten only!
Hand Tighten Only
Overtightening may permanently damage product threads
and lead to failure. (union nut only)
Do Not Use Tools
Use of tool(s) may damage product beyond repair and
potentially void product warranty. (union nut only)
Note / Technical Notes
Highlights additional information or detailed procedure.
Hastelloy®is a registered trademark
of Haynes International.

3
2581 FlowtraMag®Meter
Specications
General
Pipe Size Range ..................... DN25 (1 in.), DN40 (1.5 in.),
DN50 (2 in.), DN80 (3 in.),
DN100 (4 in.)
Flow Range - Titanium or Hastelloy C
Minimum.................................. 0.02 m/s (0.07 ft/s)
Maximum................................. 10 m/s (33 ft/s)
DN25 (1 in.) ............................. 0.53 to 266.35 LPM
(0.14 to 70.36 GPM)
DN40 (1.5 in.) ........................ 1.36 to 662.34 LPM
(0.36 to 174.97 GPM)
DN50 (2 in.)............................. 2.23 to 1112.60 LPM
(0.59 to 293.92 GPM)
DN80 (3 in.) ........................... 5.11 to 2493.75 LPM
(1.35 to 658.78 GPM)
DN100 (4 in.)........................... 8.72 to 4357.83 LPM
(2.30 to 1151.22 GPM)
Repeatability ........................... ± 0.5% of reading @ 25 °C (77 °F)
Accuracy ................................. ± 1% ± 0.01 m/s (0.033 ft/s)
(reference condition 50 µS/cm and
water based)
Minimum Conductivity............. 20 µS/cm - water based
Suspended Solids ................... 5%
Power Cable Wire ................... 7.6 m (25 ft) 2-conductor shielded
Output Cable Wire .................. 7.6 m (25 ft) 5-conductor shielded
• May be extended up to 305 m (1,000 ft), eld splice or special
order.
Wetted Materials
Flow Tube Body ...................... PVC
Electrode ................................. Titanium, grade 2 or
Hastelloy C -276
O-rings..................................... FKM or EPDM
Electrical
Power Requirements
DC Power (Functional Rating) 24 VDC, max 24W (12 to 32 VDC)
Reverse Polarity Protected ..... Up to 35 VDC
Over-Voltage Max. Rating....... 35 VDC
Please use a power supply that has been IEC 60950/61010/60601
Certied and will not be used outside of its electrical ratings and
matches the environmental conditions of the ow meter.
Current Output
Passive (low power) 4 to 20 mA per ANSI-ISA 50.00.01 class H
Active Output........................... 4 to 20 mA
Passive / Active ....................... User selectable
Passive Loop Voltage ............. 12 to 32 VDC
Loop Accuracy......................... ± 32 µA (25 °C @ 24 VDC)
Loop Resolution ...................... 5 µA
Loop Span............................... 3.8 mA to 21 mA
Error Condition ........................ None, 3.6 mA or 22 mA
Max. Cable .............................. 305 m (1,000 ft)
Max. Loop Resistance ............ 600 Ω @ 24 VDC
Compatible with PLC, PC or similar equipment
Frequency Output
Frequency ............................... 5 to 24 VDC, 50 mA max.
Frequency Range ................... 0 to 1500 Hz
Max. Pull-up Voltage ............... 30 VDC, 10k pull-up recommended
Max. Cable .............................. 305 m (1,000 ft)
Compatible with GF 9900, 9950, and
0486 Probus Concentrator
Digital (S
3
L) Output
Digital (S
3
L) ............................. 4.5 to 5.5 VDC
Serial ASCII, TTL level 9600 bps
The Bluetooth® word mark and logos are registered trademarks owned by
Bluetooth SIG,Inc. and any use of such marks by Georg Fischer is under license.
Other trademarks and trade names are those of their respective owners.
Digital (S
3
L) Output continued
Compatible with GF 9900, 9950 and
0486 Probus Concentrator
Max. Cable Length.................. Application dependent
Sensor Conguration
GF Cong Tool Bluetooth®App
2.4 GHz RF Transceiver Compatible with Bluetooth
®
Low Energy (BLE) 4.2 Specication
GF Cong Tool App available in iOS and Android
App Stores
0252 Conguration Tool
Environmental Requirements
Enclosure ................................ NEMA 4X / IP65
Relative Humidity .................... 0 to 95% (non-condensing)
Altitude .................................... 4,000 m (13,123 ft)
Storage Temperature .............. -10 °C to 60 °C (14 °F to 140 °F)
Operating Temperature
Ambient ............................... -10 °C to 60 °C (14 °F to 140 °F)
Media .................................. 0 °C to 60 °C (32 °F to 140 °F)
UL environmental Rating..... UL 50, Type 6P Storage
Maximum Operating
Pressure.................................. 10 bar @ 23 °C (145 psi @ 73 °F)
DN25 (1 in.), DN40 (1.5 in.)
and DN50 (2 in.) ...................... 3.5 bar @ 60 °C (51 psi @ 140 °F)
DN80 (3 in.) and
DN100 (4 in.)........................... 2.27 bar @ 60 °C (33 psi @ 140 °F)
Shipping Weights - Titanium or Hastelloy C, EPDM or FKM
DN25 (1 in.)............................. 3.4 kg (7.5 lbs)
DN40 (1.5 in.) ........................ 4.1 kg (9.0 lbs)
DN50 (2 in.)............................. 4.5 kg (9.9 lbs)
DN80 (3 in.) ........................... 7.5 kg (16.5 lbs)
DN100 (4 in.)........................... 8.3 kg (18.3 lbs)
Sensor Weights - Titanium or Hastelloy C
DN25 (1 in.) ..............................2.7 kg (5.9 lbs)
DN40 (1.5 in.) ........................ 2.9 kg (6.3 lbs )
DN50 (2 in.)............................. 3.7 kg (8.1 lbs)
DN80 (3 in.) ........................... 5.8 kg (12.7 lbs )*
DN100 (4 in.)............................6.26 kg (13.9 lbs)*
*excludes mounting hardware
Standards and Approvals
UKCA, CE, UL, CUL Recognized Component
NSF (Titanium only, does not include Flange gaskets)
RoHS compliant
Manufactured under ISO 9001, ISO 14001 and ISO 45001
China RoHS (visit gfps.com for details)
Declaration of Conformity according to FCC Part 15
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and,
(2) This device must accept any interference received, including
interference that may cause undesired operation.

42581 FlowtraMag®Meter
Sensor Dimensions
DN40,1.5 in.
Metric and ASTM union ends and union nuts shown.
DN25, 1 in.
Metric and ASTM union ends and union nuts shown.
199.6 ±1.6 mm
(7.86 ±0.062 in.)
213.7 ±1.8 mm
(8.41 ±0.10 in.)
Pipe Cutout dimension
2X 18.5 mm
(2X 1.13 in.)
25.5 mm
(1.00 in.)
24 mm
(1.41 in.)
2X 5.5 mm
(2X 0.22 in.)
99.2 mm
(3.91 in.)
249.4 mm
(9.82 in.)
Ø 138.7 mm
(Ø 5.46 in.)
99.2 mm
(3.91 in.)
249.4 mm
(9.82 in.)
Ø 138.7 mm
(Ø 5.46 in.)
2X 6.6 mm
(2X 0.26 in.)
226.6 ±1.6 mm
(8.92 ±0.062 in.)
232.6 ±1.8 mm
(9.53 ±0.10 in.)
Pipe Cutout dimension
2X 27.5 mm
(2X 1.38 in.)
33.3 mm
(1.31 in.)
34 mm
(1.99 in.)
WARNING: ASTM and Metric pipe cutout dimensions are di󰀨erent.
DN50, 2 in.
Metric and ASTM Union ends and union nuts shown.
99.2 mm
(3.91 in.)
249.4 mm
(9.82 in.)
Ø 138.7 mm
(Ø 5.46 in.)
2X 7.1 mm
(2X 0.28 in.)
239.3 ±1.6 mm
(9.42 ±0.062 in.)
258.1 ±1.8 mm
(10.16 ±0.10 in.)
Pipe Cutout dimension
2X 34 mm
(2X 1.51 in.)
38.9 mm
(1.53 in.)
41 mm
(2.22 in.)
DN80, 3 in.
Flange bolt kits and gaskets not shown (Sold separately).
99.2 mm
(3.91 in.)
273.06 ± 3.2 mm
(10.75 ±0.125 in.)
Ø 217.5 mm
(Ø 8.56 in.)
Ø 203.2 mm
(Ø 8.00 in.)
327.6 mm
(12.90 in.)
DN100, 4 in.
Flange bolt kits and gaskets not shown (Sold separately).
99.2 mm
(3.91 in.)
276.86 ±3.2 mm
(10.90 ±0.125 in.)
Ø 228.6 mm
(Ø 9.00 in.)
Ø 216.7 mm
(Ø 8.53 in.)
328.5 mm
(12.93 in.)

5
2581 FlowtraMag®Meter
The 2581 FlowtraMag requires a minimum of 3x ID upstream and 2 x ID downstream of the sensor for best performance.
Sensor Location
3 x I.D. 2 x I.D.
2 x 90° Elbow
3 x I.D. 2 x I.D.
90° Elbow
3 x I.D. 2 x I.D.
2 x 90° Elbow
3 dimensions
Pump/Valve
2 x I.D.
OKRecommended OK
Vertical flow is OK IF the
pipe remains FULL
at all times.
Reducer
3 x I.D. 2 x I.D.
3 x I.D.
Sensor Mounting Angle
Horizontal Pipe Runs
GF recommends installing the sensor electronics at the
12 o'clock position.
DO NOT HANDLE BY THE SENSOR HEAD!
Always handle FlowtraMag Meters by the union nuts
or anges, NOT the sensor head.
Flow
Selecting a Location
• The 2581 requires a full pipe for accurate measurement.
• In vertical installations, assemble the 2581 so the conduit ports are
facing downward. This prevents condensation inside the conduit from
being directed into the 2581 electronics housing.
• Chemical injection systems can temporarily alter the uid conductivity
and cause anomalies in the magmeter measurement.
• To avoid this problem, install the magmeter UPSTREAM of the
injection point.
ENTER
9900 2581
9900 2581
ENTER
Injection Point
Injection Point

62581 FlowtraMag®Meter
3 x I.D. 2 x I.D.
2 x 90° Elbow
3 x I.D. 2 x I.D.
90° Elbow
3 x I.D. 2 x I.D.
2 x 90° Elbow
3 dimensions
Pump/Valve
2 x I.D.
OKRecommended OK
Vertical flow is OK IF the
pipe remains FULL
at all times.
Reducer
3 x I.D. 2 x I.D.
3 x I.D.
Vertical Pipe Runs
To ensure pipe is owing full with some back pressure, it is highly recommended that the uid ows upward.
Gravity and Discharge Lines
It is recommended to install a u-trap to ensure the pipe remains full at all times and to minimize air bubbles.
A vacuum breaker may be required downstream of the FlowtraMag to ensure pipe doesn't drain and ll with air.
2
13
1a
O-ringO-ring
Union
End
Union
End
Union
Nut
Union
Nut
Pipe
Pipe
Sensor Pipe Installation
1. Choose a mounting location that satises the requirements.
2. Select appropriate (Metric or ASTM) union end for installation.
3. Install sensor with ow arrow pointing in the direction of ow.
Note: Gland ttings should point upstream of ow.
2581 FlowtraMag DN25 (1 in.)
2581 FlowtraMag DN40 (1.5 in.)
2581 FlowtraMag DN50 (2 in.)
Union Ends Hand Tighten Only!
Application Tip: For Metric pipe
installation, change Union End to Metric.
Sensor Mounting Angle Continued

7
2581 FlowtraMag®Meter
2581 FlowtraMag DN80 (3 in.)
2581 FlowtraMag DN100 (4 in.)
DO NOT OVER TORQUE BOLTS!
Recommended bolt torque for the DN80 (3 in.) and
DN100 (4 in.) ange of 27-41 Nm (20 to 30 ft-lbs)
Tighten bolts by rst assembling and hand tightening the nuts
to position the gasket in place. Then tighten the bolts in a
diagonal pattern 50% the recommended torque, then 100% of
recommended torque.
8
7
6
5
4
3
2
1
Tightening Pattern, 8 bolt
Sensor Pipe Installation
2
1
3
4
3
2
1
Tightening Pattern, 4 bolt
2
13
1a
O-ringO-ring
Union
End
Union
End
Union
Nut
Union
Nut
Pipe
Pipe
DN100 (4 in.) Components, Exploded view
DN80 Metric Bolt Pattern Components (Note: Use M16 bolts - Sold Separately)
Part Number Description Qty Req'd
721 790 113 DN80 Flange Adapter, PVC-U, Metric (Use backing ange 721 700 013) 2
721 700 013 DN80 Backing Flange, PVC-U, Metric 2
748 440 713 EPDM Prole Flange Gasket, Metric 2
749 440 713 FKM Prole Flange Gasket, Metric 2
DN100 Metric Bolt Pattern Components (Note: Use M16 bolts - Sold Separately)
Part Number Description Qty Req'd
721 790 114 DN100 Flange Adapter, PVC-U, Metric (Use backing ange 721 700 014) 2
721 700 014 DN100 Backing Flange, PVC-U, Metric 2
748 440 714 EPDM Prole Flange Gasket, Metric 2
749 440 714 FKM Prole Flange Gasket, Metric 2
3 Inch ANSI Bolt Pattern Components
Part Number Description Qty Req'd
854-030 3 in. PVC Schedule 80 Van-Stone Flange (S) 2
37Z 000 068 Van Stone Flange 316SS Bolt Kit, 4-hole, 3 in. ASTM 2
37X 002 008 EPDM Full Face Flange Gasket - 150# ANSI Bolt Pattern - 3 in. 2
37X 002 117 FKM Full Face Flange Gasket - 150# ANSI Bolt Pattern - 3 in. 2
4 Inch ANSI Bolt Pattern Components
Part Number Description Qty Req'd
854-040 4 in. PVC Schedule 80 Van-Stone Flange (S) 2
37Z 000 069 Van Stone Flange 316SS Bolt Kit, 8-hole, 4 in. ASTM 2
37X 002 009 EPDM Full Face Flange Gasket - 150# ANSI Bolt Pattern - 4 in. 2
37X 002 118 FKM Full Face Flange Gasket - 150# ANSI Bolt Pattern - 4 in. 2
1a
2
1
3
3
1a
3

82581 FlowtraMag®Meter
Wiring Conguration
When using the 2581 FlowtraMag with frequency or Digital (S3L), all of the connections from the 2581 FlowtraMag
to external equipment (PLC, Datalogger, Chart Recorder, Flow meter, etc.) are made using the red and white wires.
See wiring diagrams for further details.
3-2581
Black -
Red +
White
Red
Power cable
Output cable
Shield
Black
Brown
Shield
Blue used for GF Config
App password reset only
S3L / Frequency
4 to 20 mA
(EMC enhancement)
24 VDC @ 1A min.
Power Supply
DO NOT REMOVE WIRING!
Damaging or removing the power or
output cables will void warranty.
Electromagnetic Compatibility (EMC) Recommendations
Complex instrumentation systems such as the 2581 FlowtraMag and the associated devices may face challenges involving
Electromagnetic Interference (EMI) that present as erratic readings.
EMI Interference may be coupled to the system via cables (conducted interference) or broadcast via electrical radiation
(radiated interference). Radiated interference may be mitigated by relocating the source or increasing the distance from the
source and using metal shielding. Conducted interference can be mitigated by careful wiring practices. Because EMI may
follow multiple paths, it will be necessary to observe the e󰀨ectiveness of various grounding options.
2581 FlowtraMag Power Cable
• In electrically noisy environments, connect the power cable shield (drain) wire to a clean low impedance earth ground.
• If there is a single power supply for all 2581 FlowtraMag system components (Instruments, PLCs and VFDs), route signal
wiring directly to the instruments. Do not use ground points common to other wiring. Avoid creating ground loops which
occur when the potential across wires that connect to ground di󰀨er from each other.
• If separate power supplies are used, connect all power grounds to a common low impedance ground.
2581 FlowtraMag Output Cable
• In electrically noisy environments, connecting the Signal Output cable shield (drain) wire to a clean low impedance earth
ground may help reduce signal noise and preserve communication. Observe the di󰀨erence between connecting or not
connecting the shield. Avoid creating ground loops which occur when the potential across wires that connect to ground
di󰀨er from each other.
Frequency/S3L Output
-The S3L/Frequency cable shares the ground with the 2581 FlowtraMag Power Supply. Use a common DC power
supply for the 2581 FlowtraMag and the monitoring ow instrument.
4 to 20 mA Output
-If the 4 to 20 mA is used to control a highly inductive load such as a Variable Freq Drive or a DC motor, use separate
DC power supplies for the 2581 FlowtraMag and the 4 to 20 mA device, active mode should be used.
- In Passive mode the 2581 FlowtraMag loop output cable shares the ground with the 2581 FlowtraMag Power Supply.
Use the same DC power supply for the 2581 FlowtraMag and the 4 to 20 mA device.
- In Active mode the 2581 FlowtraMag loop output cable is isolated from the 2581 FlowtraMag Power Supply.
The 4 to 20 mA receiving device can use a di󰀨erent Power Supply.
NOTE: If interference persists, an EMI lter (see EMI Filter Wiring section) or proper grounding
of the uid (see Grounding section) may be necessary.

9
2581 FlowtraMag®Meter
Recommended:
The directional arrow should be pointed
DOWNSTREAM for correct operation. If the 2581
FlowtraMag is installed on a vertical pipe, the cable
ports should be turned to point downward.
This will prevent condensation from being
channeled into the enclosure.
Application Tip:
If your ow is in the reverse direction, it is possible to set
up reverse ow via the GF 0252 Conguration Tool or GF
Cong Tool App.
Default Congurations
Wiring Conguration Continued
DN25 (1 in.) DN40 (1.5 in.) DN50 (2 in.) DN80 (3 in.) DN100 (4 in.)
Units GPM GPM GPM GPM GPM
Totalizer Units Gallons Gallons Gallons Gallons Gallons
K-Factor Values 852.716 pulse/gal 342.9120 pulse/gal 204.139 pulse/gal 91.0772 pulse/gal 52.1188 pulse/gal
Averaging Low Low Low Low Low
Sensitivity 3.5182 8.7486 14.696 32.9390 57.561
Low Flow Cuto󰀨 0.1407 0.3499 0.5878 1.3176 2.3024
4 mA Setpoint 0 0 0 0 0
20 mA Setpoint 70.3630 174.9718 293.9200 658.7815 1151.2153
Error Current 22 22 22 22 22
Passive/Active Passive Passive Passive Passive Passive
S3L/Freq Freq Freq Freq Freq Freq

10 2581 FlowtraMag®Meter
Wiring with Frequency Output
• When choosing Frequency in the
Bluetooth®App, the 2581 FlowtraMag
outputs an open collector frequency signal
that can be connected to any powered
GF ow meter (models 9900, 9900-1BC,
9950).
• 24 VDC power at 1 amp should always
be connected.
NOTE: The frequency output will be
displayed as positive ow
regardless of the ow direction.
Wiring with 4 to 20 mA Loop Output
Wiring
Compatible with all POWERED GF Flow Instruments
CAUTION!
Turn o󰀨 Power before Wiring.
DO NOT REMOVE Seal!
Warranty void if seal is
broken or removed. WARRANTY
VOID IF
REMOVED
Black
Red
Shield (EMC enhancement)
24 VDC @ 1A min.
Power Supply
–
+
Power cable
WARRANTY
VOID IF
REMOVED
24 VDC @ 1A min.
Power Supply
–
+
2581
4 to 20 mA - (Black)
4 to 20 mA + (Brown)
Output cable
White
Red
Shield
Blue not used
Not used
2581
Power cable
Black
Red
Shield (EMC enhancement)
Choose Passive or Active
in Bluetooth App
24 VDC @ 1A min.
Power Supply
–
+
2581
Ground - (White)
Data (Red)
Output cable
Black
Brown
Shield
Blue not used
Not used
2581
Power cable
Black
Red
Shield (EMC enhancement)
Choose Frequency in
Bluetooth App

11
2581 FlowtraMag®Meter
Digital (S3L) Output (Compatible with 9900 and 9950 Transmitter)
• To select S3L, use Bluetooth® App.
• 24 VDC power at a minimum of 1 amp is always be connected to the 2581 FlowtraMag.
The 9900 and 9950 will display negative numbers to indicate reverse ow.
• The maximum cable length from the 2581 FlowtraMag to the 9900 depends on the 9900 conguration.
• Refer to the 9900 or 9950 manual for complete information.
2581 FlowtraMag Wiring to GF 9900
Wiring with Digital (S3L) Output
PWR–
9900
Power
Input
LOOP–
LOOP+
PWR+
9900 S3L
Terminal
DATA
GND V+ SHLD
9900
Transmitter
S3L/Freq
24 VDC @ 1A min.
Power Supply
–
+
2581
Ground (White)
Data (Red)
Output cable
Black
Brown
Shield
Blue not used
Not used
2581
Power cable
Black
Red
Shield (EMC enhancement)
GF Cong Tool App set to S3L
When using the 2581
FlowtraMag in a system
with other manufacturer's
equipment, a 10 KΩ pull-up
resistor (not supplied) may
be required to power the
open collector output.
Wiring with Frequency Other Manufacturer's Equipment
10KΩ
5 - 30 VDC
Power Supply
–
+
Other MFG
Equipment
Freq In
GND
2581
Ground - (White)
Data (Red)
Output cable
Black
Brown
Blue not used
Not used
Choose Frequency in
Bluetooth
®App
Shield (EMC enhancement)
WARNING
Connect the Red and White wires only when
an S3L instrument is connected or when
frequency output is used, in which case use
a 10K pull-up resistor as shown.

12 2581 FlowtraMag®Meter
2581 FlowtraMag Wiring to GF 9950
Refer to the 0486 Probus
Concentrator manual for
Frequency wiring and
programing instructions.
Wiring with Digital (S3L) Output Continued
+V
FREQ
DATA
GND
9950
Digital (S3L)
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2 CH1
DC POWER
+V
FREQ
DATA
GND
X
No connection
X
No connection
9950
Frequency
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2 CH1
DC POWER
X
No connection
X
No connection
2581
Output cable
Black
Brown
Shield
Blue not used
Not used
Ground (White)
Data (Red)
2581
Output cable
Black
Brown
Shield
Blue not used
Not used
Ground (White)
Frequency (Red)
+V
FREQ
DATA
GND
9950
Digital (S3L)
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2 CH1
DC POWER
+V
FREQ
DATA
GND
X
No connection
X
No connection
9950
Frequency
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2 CH1
DC POWER
X
No connection
X
No connection
2581
Output cable
Black
Brown
Shield
Blue not used
Not used
Ground (White)
Data (Red)
2581
Output cable
Black
Brown
Shield
Blue not used
Not used
Ground (White)
Frequency (Red)
GF Cong Tool App set to S3L
Output cable
Output to 2581Input from PLC
Power cable
4 to 20 mA
24 VDC
Power Supply Black
_
Red+
Black
_
Brown+
_
+
_
+
Shield
(EMC enhancement)
Not Used:
Red, white, shield, blue
EMI Filter
1
2
3
4
1
2
3
4
EMI Filter Wiring
EMI Filter Wiring for 2581 FlowtraMag via 4 to 20 mA
Install one EMI Filter Kit per 2581 FlowtraMag unit in-line with the DC power input and 4-20 mA current loop output, as shown
in the diagram below.
NOTE: For proper functionality, install the EMI Filter Kit closer to the 2581 FlowtraMag rather than the VFD.

13
2581 FlowtraMag®Meter
App Conguration - App Set Up
Bluetooth® App Setup Steps - iOS version
Search for GF Conguration Tool in the App store. Download the GF Cong Tool.
1. Press GET. App will install on phone or other wireless device.
2. Return to home screen and look for App icon, click the blue GF Cong Tool icon
3. Continue to Sensor Setup Section (next page)
Bluetooth® App Setup Steps - Android version
Download the GF Conguration Tool App by scanning the QR code or searching
in Google Play directly.
1. When prompted press Install
2. Return to home screen and look for App icon, click the blue GF Cong Tool icon
3. Continue to Sensor Setup section (next page.)
Config Tool
Config Tool

14 2581 FlowtraMag®Meter
App Conguration - Sensor Setup
iOS version
When the 2581 FlowtraMag is in operation,
when in close proximity to the 2581 FlowtraMag
(less than 20 ft), open the GF Cong Tool App
to begin a search nearby devices and go thru the
pairing process. Click on connect next to device
you are pairing to.
1. Pair the device by entering the
device Code/Pin.
The default Passkey is the last
6 digits of the product serial
number.
2. Click Pair/OK
3. Make any adjustments to the
2581 FlowtraMag, if necessary,
by tapping the Hamburger Menu
(menu list) or Gear (edit settings).
Config Tool
Code/Pin
Hamburger
(Menu)
Gear
(Settings)
Code/Pin
Hamburger
(Menu)
Gear
(Settings)
(example shows Menu)
Android version (Version 8 or newer)
When the 2581 FlowtraMag is in operation,
when in close proximity to the 2581 FlowtraMag
(less than 20 ft), open the GF Cong Tool App
to begin a search nearby devices and go thru the
pairing process. Click on connect next to device
you are pairing to.
1. Pair the device by entering the
device Code/Pin.
The default Passkey is the
last 6 digits of the product
serial number.
2. Click Pair/OK
3. Make any adjustments to the
2581 FlowtraMag, if necessary,
by tapping the Hamburger Menu
(menu list) or Gear (edit settings).
(example shows Menu)
Note:
If the GF Cong Tool password has been lost or forgotten, connect
blue wire to white wire while unit is powered (for 2 to 5 seconds.)
Password will reset to factory original (last 6 digits of serial number.)
082289
• • • • • 9
Config Tool

15
2581 FlowtraMag®Meter
Note:
The logging screen only logs current
screen view in real-time when
connected to the app.
App Conguration - Monitor and Real Time Log
Monitoring ow and totalizer Live Logging while connected to mobile / tablet device, set 1 sec or more increments
iOS version
Android version

16 2581 FlowtraMag®Meter
Read Loads the data from the connected device (sensor or transmitter) and updates the software’s display.
NOTE: This will overwrite any changes made in the GF Cong Tool App since the last Write.
Write Applies the data entered in the GF Cong Tool App to the connected device. Once you have entered the desired setting
changes in the software screens, press Write to load your new settings onto the connected device.
Save Stores the entire GF Cong Tool App settings conguration, as currently displayed in the application, to your mobile device.
(You will be asked to provide a conguration le name)
Load Loads a default conguration le from the factory.
Opens a previously saved settings conguration le. See Save function above.
NOTE: The le must be a GF Cong Tool App settings conguration le.
The software will verify whether the user-selected le is the correct type.
There are conguration les available for specic body sizes containing default values from the factory.
Carefully review the Device Tag and Passkey conguration in the Information screen.
Device Tag identies the sensor you are connecting to. Device Tag maximum length 20 characters.
Device Passkey is needed for connecting to the sensor. Device Passkey is a 6 digit number.
READ WRITE SAVE LOAD
Share and/or Save les Naming les
Create lename
The le will be saved at mobile/
tablet device under the Saved
Log Files
Then les can be sent by Email
with .csv le format
To delete saved les, slide to
the right and click trash can
App Conguration - Files
App Conguration - Sensor Setup

17
2581 FlowtraMag®Meter
App Conguration - Sensor Setup Continued
Information
Sensor information, Bluetooth Device Tag, Permanent
Totalizer, Resettable Totalizer, Calibration Adjustment
Factor, Zero O󰀨set Adjustment
Application Setup
To set Averaging, Sensitivity,
Low Flow Cut O󰀨, Position
of Flow, Flow Units and
Totalizer Unit.
Loop
Set 4 mA, 20 mA, Error
condition of the current output
alarm (3.6 or 22 mA), adjust
your 4 to 20 mA setting and
select output mode.
Loop adjustment is a live
update.
Then press DONE or
press on GF logo to get
back to re-connect screen.
Calibration
Custom Calibration of
Rate, Volumetric, Zero
Flow Calibration.
Note: You must press WRITE to save
your changes to the sensor.
Otherwise it saves to your phone only.
To switch between digital (S3L) and Frequency and/or 4 to 20
Active or Passive, use the GF Cong Tool App. On the loop
screen, use the drop down to select digital (S3L) or Freq
and/or Active or Passive 4 to 20 mA. Press WRITE after
making selection.
If the GF Cong Tool password has been lost or forgotten,
connect blue wire to white wire of the sensor output cable while
unit is powered (for 2 to 5 seconds.) Disconnect blue wire from
white wire after 5 seconds. Password will reset to factory original
(last 6 digits of serial number.)
To delete saved 2581 FlowtraMag in iOS:
Swipe right and select the trash can icon.
To delete saved 2581 FlowtraMag in Android:
Swipe right, "Are you sure you want to delete this
device?", choose Yes or No.
Technical Note
The totalizer in the 2581 FlowtraMag is independent from
the totalizer in the 9900/9950 transmitters. If the totalizer
is reset on the 2581 FlowtraMag, it does not reset the
totalizer on the 9900 or 9950.
iOS version Android version

18 2581 FlowtraMag®Meter
No calibration is necessary to begin using the 2581 FlowtraMag. The application and performance settings are pre-set to meet
the requirements of most applications. The FlowtraMag is shipped from the factory with the following calibration:
FlowtraMag
Model
K-Factor
pulse/L
K-Factor
pulse/Gal
Flow Rate
@20 mA L/min
Flow Rate
@20 mA Gal/min
DN25 (1 in.) 225.264 852.716 266.350 70.363
DN40 (1.5 in.) 90.588 342.912 662.340 174.972
DN50 (2 in.) 53.928 204.139 1112.600 293.920
DN80 (3 in.) 24.060 91.077 2493.760 658.781
DN100 (4 in.) 13.768 52.119 4357.800 1151.200
Calibration
Customization and Performance Settings
Application Note:
The unit is factory calibrated
for recommended setup.
See calibration certicate for
complete details.
User has the option to
custom calibrate based on
their application.
USB
Windows PC
GND
Data
3-0252
2581
Output cable
Black
Brown
Shield
Blue not used
Not used
Ground (White)
Data (Red)
iOS device with home button
Double click the home button. Find the minimized app and swipe up to close the app to clear the App Cache.
iOS device without home button
Swipe up from the bottom. Find the minimized App and swipe up to close the app to clear the App Cache.
For customization and performance settings, use the GF Cong Tool App or the GF 0252 Conguration Tool and software.
Refer to the GF 0252 Conguration Tool manual for details to adjust the following parameters:
Output Mode: Factory setting is Frequency, but must be changed to S³L on the mobile app to use the 0252 Tool.
4 to 20 mA span: Factory setting is 4 mA = 0 and 20 mA = 10 m/s (32.8 ft/sec) equivalent ow rate, refer to the calibration
table, and can also be customized to any range.
Low Flow Cuto󰀨: Factory setting is 0.02 m/s (0.07 ft/s) equivalent ow rate, and can be customized to any user preferences.
Averaging Time: Factory setting is Low. Can be customized: O󰀨, Low, Med, High.
Sensitivity: Factory setting is 0.5 m/s (1.64 ft/s) equivalent ow rate, and can be customized to user preferences.
Close App
NOTE: Set Output Mode to S³L via the Bluetooth Mobile Application.

19
2581 FlowtraMag®Meter
No AVERAGING, no SENSITIVITY
AVERAGING and SENSITIVITY
AVERAGING only
10 s2 s 20 s 30 s 40 s 50 s 60 s 70 s
NOTE: The SENSITIVITY function is ine󰀨ective if the AVERAGING function is set to o󰀨 (seconds).
No AVERAGING, no SENSITIVITY
AVERAGING and SENSITIVITY
AVERAGING only
No AVERAGING, no SENSITIVITY
AVERAGING and SENSITIVITY
AVERAGING only
No AVERAGING, no SENSITIVITY
AVERAGING and SENSITIVITY
AVERAGING only
With AVERAGING set to O󰀨 and with SENSITIVITY set to zero, the
2581 FlowtraMag responds to every unstable shift in the ow.
The dashed red line represents the actual output of the ow sensor
in unstable ow conditions.
With AVERAGING set to Medium and SENSITIVITY still set to zero
the ow rate is stabilized, but a sharp change in ow rate is not
represented for 50 seconds or longer (dotted green line).
With AVERAGING at Medium and SENSITIVITY set to a moderate
amount, the ow rate is stabilized, while the sudden shift in ow is
reected very quickly (solid blue line).
• Because ideal ow conditions are often impossible to achieve, the uids ow is often erratic, which causes erratic readings in
control features (e.g., relays, 4 to 20 mA loops, etc.) that are associated with the ow rate.
• The best solution to these problems is to correct any piping deciency that causes the instability. This may involve longer
straight runs upstream, taking steps to ensure pipe remains full during ow conditions, and other installation changes.
In many situations, however, these measures are simply not possible.
• The 2581 FlowtraMag provides two tools that are designed to "work around" these deciencies. The Averaging and the
Sensitivity features should be studied before making adjustments.
Averaging Time in Seconds (Factory set: Low)
• Set the time the meter will use as the averaging period. The ranges are O󰀨, Low (10 s), Med (40 s) and High (120 s).
Use higher averaging times to smooth the display and current output where the ow in the pipe is erratic.
Quick Response Sensitivity (Factory Set: 0.5 m/s (1.64 ft/s) equivalent)
• Sets an amount of ow rate change at a given reference ow rate required to momentarily allow the 2581 FlowtraMag to change
from the selected averaging time to a faster response. The reference ow rate should be near the range of normal operation.
Turn the averaging setting to o󰀨 and observe the ow rate variation, enter a sensitivity amount that is two times larger than the
amount of ow variation.
Averaging and Sensitivity Settings

20 2581 FlowtraMag®Meter
LED Status Indicators
LEDs on the 2581 FlowtraMag circuit board are useful to identify problems with the meter and the ow conditions.
LED Condition Indication
All O󰀨 The power is o󰀨 or the sensor is not connected
Solid Blue Normal operation, full pipe, no ow
Blinking Blue Normal operation, blink rate is proportional to ow rate
Solid Purple Partially lled pipe, ow rate is zero
Blinking Purple Partially lled pipe, blink rate is proportional to ow rate
Blinking Red Measurement out of range. If condition persists, will turn to solid red after 1 minute
Solid Red Instrument error, defective electronic component. Contact Technical Support
Green - Connected device
White - No connections
Grounding
Inconsistent or inaccurate readings can occur due to electrical noise radiated through the uid when the uid has very high conductivity
or noise levels. In these cases, it is strongly recommended to install grounding rings or metallic couplings immediately upstream and
downstream of the 2581 FlowtraMag and connect them to an isolated earth ground wire (12 AWG/4mm^2 wire recommended).
NOTE: These grounding devices must be
in contact with the uid and must not a󰀨ect
the ow. In addition, the grounding wires
should not be connected to any other
electrical devices to avoid ground loops.
Grounding
ring
Grounding
ring
Gaskets Gaskets
Earth ground