Arkon AgrimagP User manual

Agrimag User Guide
1
V1.9 26-4-2019
V1.4 04-10-2012
List of Contents
1. Introduction ................................................................................................................3
1.1. Operating Principle________________________________________________________ 3
1.2. Applications _____________________________________________________________3
1.3. Safety Instructions ________________________________________________________3
1.4. Unpacking the flowmeter ___________________________________________________ 3
2. Installation..................................................................................................................4
2.1. Sensor Installation ________________________________________________________4
2.2. Position of flowmeter ______________________________________________________ 5
2.3. Connections _____________________________________________________________ 6
3. Agrimag, AgrimagP, AgrimagP2 Unit.......................................................................7
3.1. Main screen _____________________________________________________________ 7
3.2. Errors and Warnings_______________________________________________________8
4. Power Supply .............................................................................................................9
4.1. Agrimag Battery Specification________________________________________________ 9
4.2. Agrimag - Battery life ______________________________________________________9
4.3. Agrimag - Changing the battery ______________________________________________9
4.4. Agrimag - Battery conservation ______________________________________________ 9
4.5. AgrimagP –Power Supply _________________________________________________10
4.6. AgrimagP2 –Power Supply ________________________________________________10
5. Outputs .....................................................................................................................11
5.1. AgrimagP –Frequency output ______________________________________________11
5.2. AgrimagP2 –Current loop output____________________________________________ 11
5.3. AgrimagP2 –RS485______________________________________________________ 12
6. Internal backup.........................................................................................................13
6.1. Automatic data saving ____________________________________________________13
7. AgrimagP2 connection to PC..................................................................................13
8. AgrimagP2 - Datalogger ..........................................................................................13
9. AgrimagP2 SW .........................................................................................................14
9.1. System requirements _____________________________________________________ 14
9.2. Installation/Uninstall AgrimagP2 software _____________________________________ 14
9.3. Service section __________________________________________________________15
9.4. Statistic section__________________________________________________________ 16
10. Cleaning..................................................................................................................17
11. Specifications.........................................................................................................18
12. Flowmeter dimensions ..........................................................................................19
13. Fittings....................................................................................................................20
14. Troubleshooting.....................................................................................................22
14.1. Trouble: non working display ______________________________________________22
14.2. Trouble: Non stable flow or Empty pipe alarm _________________________________ 23
14.3. Trouble: Error overloaded_________________________________________________ 24
14.4. Trouble: Error excitation __________________________________________________25
14.5. Trouble: AD –converter error______________________________________________25
14.6. Trouble: Low battery error*________________________________________________26
15. How to order your Agrimag, AgrimagP, AgrimagP2 ...........................................26
16. Appendix.................................................................................................................27
16.1. CE requirements________________________________________________________ 27
16.2. Warranty______________________________________________________________ 27
16.3. Contact _______________________________________________________________27

Agrimag User Guide
2
V1.9 26-4-2019
V1.4 04-10-2012

Agrimag User Guide
3
V1.9 26-4-2019
V1.4 04-10-2012
B
v
U
1. Introduction
1.1. Operating Principle
The measurement is based on the principle of Faraday‘s law of
electromagnetic induction where a voltage is induced in an electrically
conductive body that moves in a magnetic field. Liquid flows through a tube in
the direction of the magnetic field. Liquid with a certain minimum electrical
conductivity induces a voltage which is detected by two electrodes located in a
90 degree angle from the magnetic field and the flow direction.
1.2. Applications
Water / waste
water
Agriculture
1.3. Safety Instructions
Please read this manual carefully before using the product.
Keep this manual for future reference. Arkon Flow Systems, s.r.o will not be liable for
any damage caused by improper use of the product or its accessories.
The Agrimag, AgrimagP, AgrimagP2 flowmeter must not be mounted in explosive hazardous
areas.
1.4. Unpacking the flowmeter
When unpacking the flowmeter, conduct a visual check
of the flowmeter upon receipt to make sure the product has
not been damaged during transport.
Check the completeness of the package. In case of any
problem, contact the Arkon sales department without delay.
oFlowmeter
oManual
oAgrimagP, AgrimagP2: cable
Minimum liquid conductivity
≥20 s / cm
Liquid velocity
min. 0.1 m / sec, max. 10 m / sec.

Agrimag User Guide
4
V1.9 26-4-2019
2. Installation
2.1. Sensor Installation
Proper installation is extremely important in order for your flowmeter to work correctly. There are minimum
sensor installation requirements that need to be respected at all Times. Please note that Arkon cannot
warranty any installation which does not comply with these requirements.
Horizontal standard mounting
The sensor tube must always remain full. The best
way to achieve this is to locate the sensor in a low
section pipe, see the following picture.
It is mandatory to install the sensor in a section of
straight pipe with at least 5 times the pipe diameter
before sensor and 3 times after sensor.
Pipe reducers
If the pipe diameter is not the same as the diameter
of sensor, then pipe reducers can be used. So as
not to lose accuracy of the measurement, the slope
of reducers should not exceed 8º.
Vertical mounting
When the sensor is mounted on a vertical section of
pipe, the flow direction must be upwards. In the case
of a downward flow direction, air bubbles can collect
in the sensor and the measurement could be
unstable and inaccurate.
Pumps
Never install the sensor on the suction side of a
pump or on a section of pipe where a vacuum is
possible.
Valves
Suitable location of a shutoff valve is downstream of
a sensor.

Agrimag User Guide
5
V1.9 26-4-2019
The sensor head has to be properly
tightened
During the sensor installation please check the
head and the four screws for proper tight.
Removal during maintenance
If the application requires removal of the sensor
for periodic maintenance, it is recommended to
install a bypass section as the drawing below.
2.2. Position of flowmeter
This is an all position flowmeter which can be installed either vertically or horizontally, register up, down or
angled. However, entrained air or solids may make some positions preferable to others. See the position
diagram for guidance. The correct position will be related to the function of the electrodes. The two
electrodes located on the vertical axis of the flowmeter are used for earthing purposes. The two electrodes
located on the horizontal axis of the flowmeters are used for measuring.
In this position, if there are any air bubbles or
if sediments accumulate in the lower part
of the flowmeter, it will could have an adverse
effect on the earthing, which could influence the
accuracy of the measurement.
By rotating the flowmeter, it is possible to prevent
the sediments accumulating at the earthing
electrodes. Also there is less chance of the air
bubbles affecting the earthing electrode.

Agrimag User Guide
6
V1.9 26-4-2019
2.3. Connections
Follow the diagram below to make the connections:
Step 1
Position gasket at either end
Step 2
Place adapter against gasket, open
screw clamps to clear flanges
Step 3
Place screw clamps over both adapter
and meter flanges and tighten screws

Agrimag User Guide
7
V1.9 26-4-2019
3. Agrimag, AgrimagP, AgrimagP2 Unit
The Agrimag, AgrimagP, AgrimagP2 flowmeter consists of the motherboard, a graphical display, touch-
buttons and sensor housing. Through the display and with help of the controls, you can see and change
flow and totalizers.
The following symbols are used in this manual and on the flowmeter display.
3.1. Main screen
Note: these are not pushing buttons, to activate hold your finger over the white rectangle for 2 to 4 seconds.
On/Off
Turns the meter on, switching the meter off.
Batch Reset
Clears the Batch volume.
Batch/Total
Switches between totalizers.
Combination Batch Reset and Batch/Total together
Clears the Total volume.
Combination On/Off and Batch/Total together
Changes the unit of a system (l/s and USG/min, resp. litres and gallons, etc.)
Combination On/Off and Batch Reset together
Changes permanent operation and Battery saving mode.
Volume
Flow Unit
Actual totalizer
Flow Unit
Volume Total
Actual Flow
Switch off
after 15
minutes in
zero flow
or empty
pipe
Permanent
operation
Currently
pressed button
Empty pipe
detector
Battery
monitor
(Agrimag)

Agrimag User Guide
8
V1.9 26-4-2019
Total Volume
This is the total volume counter. Negative flow is not counted.*
Batch Volume
This counter works the same way as Total Volume. Both counters are independently clearable.*
*If value of any Volume counter higher than 4 000 000 m3, than value of Volume show only in m3 unit. If value of any Volume counter higher than
999 999 999 m3, then this Volume will be reset to 0
3.2. Errors and Warnings
That is a list of the possible errors for Agrimag/AgrimagP:
Low Battery status
If the Low Battery appears on the screen, we recommend that the existing batteries are replaced with new
batteries. Note: Applies for battery operated version only.
Empty Pipe
If the Empty pipe appears on the screen there is no medium in the pipes, the meter is preserving batteries
until the pipes are full again.
Excitation
Coils interrupted or disconnected.
AD-converter
AD converter fault.
Note: The error disappears when the cause of it is fixed. You can see the measurement when you touch
any of the controls.
Overloaded
That error occurs when the measured flow is bigger than 1.2 * Flow Qn. Depending on the size:
Size 25mm: 20.76m3/h
Size 50mm: 81.6m3/h
Size 80mm: 211.2m3/h
Generally that error will occur when the AD converter is overloaded. It can be because on the electrodes
are very big voltage or because the flow is really that high.

Agrimag User Guide
9
V1.9 26-4-2019
4. Power Supply
The Agrimag series consists of three versions:
Agrimag –Battery powered meter
AgrimagP –External DC power powered meter
AgrimagP2 –External DC power powered meter
4.1. Agrimag Battery Specification
Electrical Specifications
Size
6x AA size battery
Nominal voltage
1,2-1,6VDC
Operating time
Battery capacity dependent
4.2. Agrimag - Battery life
The battery life can be from 1 year to 3 years depending on measuring or sleeping mode.
The battery operation time depends on ambient temperature, conditions, flowrate profile etc.
4.3. Agrimag - Changing the battery
1- Unscrew 4x IMBUS 4 screws.
2- Carefully open the display part of the flowmeter.
3- Open battery holder and remove batteries.
4- Install new six pieces AA batteries 1,2-1,6V.
5- Close battery holder.
6- Close display part of the flowmeter, mind the cables.
7- Tight the 4x IMBUS 4 screws.
The display part has to lie on a sealing and body during simultaneous tightening of
all four screws to avoid mechanical tension in display part! Risk of mechanical
damage to display cover and leaking.
4.4. Agrimag - Battery conservation
Agrimag has two working modes: permanent operation mode and battery saving mode.
- Permanent operation mode: the meter continuously operates, regardless of flow rate.
- Battery saving mode: the meter switches off after 15 minutes with no flow or empty pipe, the user
needs to switch it on again using On/Off button.
See 3.1 for information about setting the working mode.

Agrimag User Guide
10
V1.9 26-4-2019
4.5. AgrimagP –Power Supply
- The voltage power supply range is 9 –35VDC.
- Maximum power consumption is 1,3W.
- Connection to the unit is done via CA6 connector –a part of the delivery –standard 1m.
- Maximum cable length is 20mts.
- The power supply input is protected against reverse polarity.
Colour coding:
Brown … +U
White …. GND
Green … OPE
Yellow …. OPC
4.6. AgrimagP2 –Power Supply
- The voltage power supply range is 9 –35VDC.
- Maximum power consumption is 1,3W.
- Connection to the unit is done via CA6 connector –a part of the delivery –standard 1m.
- Maximum cable length is 20mts.
- The power supply input is protected against reverse polarity.
Colour coding:
Brown … +U
White …. GND
Green … A (RS485)
Yellow …. B (RS485)
Gray …. I/O (4-20mA)
Blue …. –V (4-20mA)
Pink …. +V (4-20mA)

Agrimag User Guide
11
V1.9 26-4-2019
5. Outputs
5.1. AgrimagP –Frequency output
Each AgrimagP is equipped with 0-1000Hz frequency output proportional to actual flow.
Standard open collector circuit.
Max switching voltage 24VDC, max current 50mA
A1”: 211,765 pulses/lt
A2”:52,941 pulses/lt
A3”:20,455 pulses/lt
Colour coding:
Brown … +U
White …. GND
Green … OPE
Yellow …. OPC
5.2. AgrimagP2 –Current loop output
Each AgrimagP2 is equipped with embeded 4-20mA current loop output signal module proportional to
actual flow.
Electrical Specifications:
12-bit DAC
Maximum Resolution 3.9 µA.
Output mode
Active or Passive
Colour coding:
Brown … +U
White …. GND
Green … A (RS485 communication bus)
Yellow …. B (RS485 communication bus)
Gray …. I/O (4-20mA)
Blue …. –V (4-20mA)
Pink …. +V (4-20mA)

Agrimag User Guide
12
V1.9 26-4-2019
5.3. AgrimagP2 –RS485
Protocol
MODBUS RTU –for detailed information see AgrimagP2 MODBUS guide
SW
Standart Arkon SW
Baud rate
9600 baud/s
BASIC CIRCUIT CONNECTIONS:
Multi-Node Network with End Termination using RS485
Terminator Rtwith resistance 100should be connect to the end of line RS-485.
Colour coding:
Brown … +U
White …. GND
Green … A (RS485 communication bus)
Yellow …. B (RS485 communication bus)
Gray …. I/O (4-20mA)
Blue …. –V (4-20mA)
Pink …. +V (4-20mA)

Agrimag User Guide
13
V1.9 26-4-2019
6. Internal backup
6.1. Automatic data saving
Once an hour some data is saved to the internal EEPROM. These are:
Total
Batch
When the batteries are removed, the last Total and last Batch will be saved in the EEPROM until the unit is
switched on again.
7. AgrimagP2 connection to PC
Picture above shows practical connection AgrimagP2 to PC through USB using RS485 –USB Converter.
8. AgrimagP2 - Datalogger
Data from datalogger save into external Flash memory. Capacity for write entries is 131072 (one entry has
8B)
All items in Datalogger are creating from 8 Bytes:
For more information see AgrimagP2 Modbus User Guide.
Date
Time
Total+
2B
2B
4B

Agrimag User Guide
14
V1.9 26-4-2019
9. AgrimagP2 SW
9.1. System requirements
There are minimum software requirements of your computer that must be satisfied to ensure that the
software functions properly. These are:
MS Windows 98/ME/NT/2000/XP/Vista/Wndows 7 operating system.
AgrimagP2 software program
RS485 input to your computer
9.2. Installation/Uninstall AgrimagP2 software
If you received the AgrimagP2 SW on a CD, place the CD-ROM with the AgrimagP2 software in your CD
drive. Double-click on the CD-ROM symbol in the "My Computer" folder on the Windows desktop. Then run
the “Setup.exe” in the "AgrimagP2 Software" folder.
The installation package can be downloaded from Arkon website.
To uninstall AgrimagP2 SW in „Settings“ (Start menu), under „Add/remove programs“ you select
AgrimagP2 and then click the „uninstall“ button.
The AgrimagP2 software program consists of two independent sections:
• The SERVICE section (“Service”) –This section serves for overall remote configuration
of the flowmeter. You enter this section by clicking "Service" in the above window.
• The STATISTIC data-reading section (“Statistic”) –This section serves for reading/exporting statistical
data for given time periods from the flowmeter. You can enter this section by clicking “Statistic" in the above
window.
The communication parameters needs to be set same in the device and in the SW
You can add shortcuts to your devices in Device list section by clicking on + sign below window.

Agrimag User Guide
15
V1.9 26-4-2019
9.3. Service section
TABS
MENU - The left-most tab is the "menu" tab, which will display the item selected in the menu-
tree on the left hand side of the main window. Some items are only accessible after entering
the correct password. When asked for a password, simply enter the correct password for the
given section (User and Factory password) and click OK.
TIME - The next tab is "Time". Here, you can enter the correct time.
DATE - The third tab from the left is "Date". Here, you can enter the correct date. (Settings are
the same as TIME - Tabs)
REAL –TIME MEASUREMENT - The 4th tab is "Real-time measurement" and it serves to view
actual current flow. The current flow is shown as the first item on top of this window, but it is
also depicted in the form of a graph at the bottom. This graph shows current flow data for the
last 100 seconds of measurement. On right side are actual errors in red color.
Basic informations
about the meter
Menu

Agrimag User Guide
16
V1.9 26-4-2019
9.4. Statistic section
*.CSV file
This format file is standard output format for databases. Examples open in Microsoft Excel.
Actual Error –
marked red
Graphical
representation of
flow in time
Actual flow and
totalizers data
Load data from
AgrimagP2
Save data
to .cvs file
Print the
data

Agrimag User Guide
17
V1.9 26-4-2019
10. Cleaning
Agrimag, AgrimagP and AgrimagP2 electromagnetic flowmeters do not have any moving parts so special
maintenance is not required, however we strongly recommend:
1. To check battery life at least once a year and change the 6 batteries if the meter shows “low
battery status”
2. Do yearly mechanical cleaning of the sensor to remove any sedimentation from liner or electrodes.
That is enough to rub the inside the tube with a piece of emery cloth

Agrimag User Guide
18
V1.9 26-4-2019
11. Specifications
Measurable media
Conductive fluids
Min. Media electrical
conductivity
≥20µS/cm
Flow range
0,1 to 10 m/s
Displayed values
Flow range (m3/h, l/s, l/m, US gal/min, UK gal/min),
Volume (m3, l, US Gal, UK Gal)
Total, Batch volume
Accuracy
±1% of reading from 100% to 10% of full scale
±3% of reading from 10% of full scale to cut-off
Full scale
1”: 0.5 – 4.8 l/s
2”: 1.9 –18.9 l/s
3“: 5.0 – 49.0 l/s
Power supply
Agrimag:
6 AA alkaline batteries,
expected lifetime 1 year
AgrimagP, AgrimagP2:
9-35VDC Power supply available in special
connector
Flow direction
Bi-directional measurement
Ambient temperature
-12 to 54ºC (10 to 130ºF)
Media temperature
0 to 60ºC (32 to 140ºF)
Display
LCD 128 x 64 px graphical, sleep mode
Control
3 touch buttons
Low flow cut-off
2% of full scale
Electronics protection
NEMA 4X standard
Other features
Test of excitation coils
Earthing through 3rd and 4th electrodes
Empty pipe detection - battery conservation
Excitation frequency
1/1,67s
Samples per Average
4 excitations
Coils resistance
100Ω
Frequency output
(AgrimagP)
Open collector proportional to flow 0-1000Hz for 0-Qmax
Max switching voltage 24VDC, max. current 50mA
Current loop output
(AgrimagP2)
Max. current 24mA
Digital communication
(AgrimagP2)
RS485 communication bus + I/O
Digital Data logger
(AgrimagP2)
Flash memory 131072 records, 15seconds minimal record interval. Saves Date,
Time and Total volume

Agrimag User Guide
19
V1.9 26-4-2019
12. Flowmeter dimensions
A
B
C
D
E
F
25 mm
100
130
80
25.4
139.7
41.402
50 mm
100
150
82.55
50.8
139.7
51.562
80 mm
100
180
111
76.2
185
64.8