Burkert 8225 Instruction Manual

E-1- Ref. 425552
CONDUCTIVITY 8225
Fluid Control Systems
TABLE OF CONTENTS
1INTRODUCTION ............................................................................................... E-2
1.1 Unpacking and Control ...................................................................................... E-2
1.2 About this Manual .............................................................................................. E-2
1.3 User's Responsibility for Safety ........................................................................ E-2
1.4 Electromagnetic compatibility ............................................................................ E-2
2SPECIFICATION ............................................................................................... E-3
2.1 Type Specification ............................................................................................. E-3
2.2 Design and Measuring Principle ....................................................................... E-5
2.3 Dimensions ........................................................................................................ E-6
2.4 Technical Data ................................................................................................... E-7
2.5 Measuring range electrodes .............................................................................. E-8
3INSTALLATION ................................................................................................ E-9
3.1 Installation Guidelines ....................................................................................... E-9
3.2 Installation.......................................................................................................... E-9
3.3 General Electrical Connection......................................................................... E-10
3.4 Electrical Wiring ............................................................................................... E-10
3.4.1 8225 without relays ................................................................................ E-10
3.4.2 8225 with Relays .................................................................................... E-12
3.4.2 8225 with 230/115 VAC Power Supply .................................................. E-13
4OPERATING ................................................................................................... E-14
4.1 Operating and Control Elements ..................................................................... E-14
4.2 Operation Mode Display .................................................................................. E-15
4.3 Calibration Mode Display ................................................................................ E-16
4.3.1 Languages .............................................................................................. E-16
4.3.2 Engineering Units ................................................................................... E-17
4.3.3 Cell Constant .......................................................................................... E-17
4.3.4 Temperature Compensation Coefficient ................................................ E-17
4.3.5 Output Current ........................................................................................ E-19
4.3.6 Relay....................................................................................................... E-19
4.3.7 Filter Function ......................................................................................... E-21
4.4 Test Menu ........................................................................................................ E-21
4.4.1 Offset-Compensation ............................................................................. E-21
4.4.2 Span-Compensation............................................................................... E-22
4.4.3 Display of non-compensated Conductivity............................................. E-22
4.4.4 Conductivity Simulation .......................................................................... E-22
5 MAINTENANCE .............................................................................................. E-23
5.1 Storing and Cleaning of the Electrode ............................................................ E-23
5.2 Trouble-shooting Guide ................................................................................... E-23
5.3 Factory Settings of the 8225 ........................................................................... E-23
5.4 Spare Parts List ............................................................................................... E-24
APPENDIX ........................................................................................................ G-1
Examples of connections for transmitter 8225.................................................. G-1

E-2-
CONDUCTIVITY 8225
Fluid Control Systems
1 INTRODUCTION
Dear Customer,
Congratulations on your purchase of our
8225 digital conductivity transmitter.
BEFORE INSTALLING OR USING THIS
PRODUCT, PLEASE TAKE OUR ADVICE
AND READ THE ENTIRE MANUAL
THOROUGHLY.
This will enable you to benefit fully from all
of the advantages which the product can
offer.
1.1 Unpacking and Control
Please verify that the product is complete
andfreefromanydamage andthat youhave
recieved the following as a standard
delivery:
-18225Digital ConductivityTransmitter
-1 Operating Instruction Manual
To ensure that you have recieved the
product required, please compare the Type
specification(Bürkertidentification number)
on the label to the lists on the following
pages. If there are any problems such as
loss or damage, please contact your local
Bürkert subsidiary.
1.2 About this Manual
This manual does not contain any form of
warranty or statement and full referal to our
general terms of sale and delivery should
be noted.
This product should only be installed and/or
repaired by correctly trained staff. If any
difficultiesmayoccur withthe productduring
installation,pleasedo nothesitate tocontact
your nearest Bürkert sales office for
assistance.
1.3 User's Responsibility for Safety
Bürkert manufactures a broad range of
conductivity transmitters designed to
operate in a wide variety of applications. It
is the customer's responsibility to select an
appropriate transmitter for the application,
ensure the unit is installed correctly, and
maintain all components. Special attention
must be made to the chemical resistance of
the transmitter and the fluids/medium which
maybe in direct contact with the product.
Ifthissymbol appears,it indicates
that special attention should be
made to the instructions, as they
may affect the safe installation, function or/
and use of the product.
1.4 Electromagnetic compatibility
This device conforms to the EMC-Directive
of the European Union 89/336/EEC.
In order to comply with the above directive,
the wiring instructions must be followed as
instructed.
!

E-3-
CONDUCTIVITY 8225
Fluid Control Systems
2 SPECIFICATION
2.1 Type Specification
2.1.2 Transmitter 8225 with 12-30 VDC power supply
Conductivity transmitter Gasket Sensor Cable entry Ident N°
STANDARD TYPES WORLWIDE
8225 with 4-20 mA FPM K=0,01 DIN 43650 PG9 418950
8225 with 4-20 mA FPM K=0,1 DIN 43650 PG9 418951
8225 with 4-20 mA FPM K=1,0 DIN 43650 PG9 418952
8225 with 4-20 mA FPM K=10 DIN 43650 PG9 418953
8225 with 4-20 mA, 2 Relays FPM K=0,01 2xPG 13,5 418954
8225 with 4-20 mA, 2 Relays FPM K=0,1 2xPG 13,5 418955
8225 with 4-20 mA, 2 Relays FPM K=1,0 2xPG 13,5 418956
8225 with 4-20 mA, 2 Relays FPM K=10 2xPG 13,5 418957
STANDARD TYPES WORLWIDE WITHOUT RELAYS
8225 with 4-20 mA EPDM K=0,01 DIN 43650 PG9 418958
8225 with 4-20 mA EPDM K=0,1 DIN 43650 PG9 418959
8225 with 4-20 mA EPDM K=1,0 DIN 43650 PG9 418960
8225 with 4-20 mA EPDM K=10 DIN 43650 PG9 418961
8225 with 4-20 mA FPM K=0,01 PG 13,5 418962
8225 with 4-20 mA FPM K=0,1 PG 13,5 418963
8225 with 4-20 mA FPM K=1,0 PG 13,5 418964
8225 with 4-20 mA FPM K=10 PG 13,5 418965
8225 with 4-20 mA EPDM K=0,01 PG 13,5 418966
8225 with 4-20 mA EPDM K=0,1 PG 13,5 418967
8225 with 4-20 mA EPDM K=1,0 PG 13,5 418968
8225 with 4-20 mA EPDM K=10 PG 13,5 418969
STANDARD TYPES WORLWIDE WITH RELAYS
8225 with 4-20 mA, 2 Relays EPDM K=0,01 2xPG 13,5 418970
8225 with 4-20 mA, 2 Relays EPDM K=0,1 2xPG 13,5 418971
8225 with 4-20 mA, 2 Relays EPDM K=1,0 2xPG 13,5 418972
8225 with 4-20 mA, 2 Relays EPDM K=10 2xPG 13,5 418973
STANDARD TYPES NORTH AMERICA
8225 with 4-20 mA FPM K=0,01 DIN 43650 G 1/2" 418974
8225 with 4-20 mA FPM K=0,1 DIN 43650 G 1/2" 418975
8225 with 4-20 mA FPM K=1,0 DIN 43650 G 1/2" 418976
8225 with 4-20 mA FPM K=10 DIN 43650 G 1/2" 418977
8225 with 4-20 mA, 2 Relays FPM K=0,01 2xG 1/2" 418978
8225 with 4-20 mA, 2 Relays FPM K=0,1 2xG 1/2" 418979
8225 with 4-20 mA, 2 Relays FPM K=1,0 2xG 1/2" 418980
8225 with 4-20 mA, 2 Relays FPM K=10 2xG 1/2" 418981
STANDARD TYPES NORTH AMERICA WITHOUT RELAYS
8225 with 4-20 mA EPDM K=0,01 DIN 43650 G 1/2" 418982
8225 with 4-20 mA EPDM K=0,1 DIN 43650 G 1/2" 418983
8225 with 4-20 mA EPDM K=1,0 DIN 43650 G 1/2" 418984
8225 with 4-20 mA EPDM K=10 DIN 43650 G 1/2" 418985
STANDARD TYPES NORTH AMERICA WITH RELAYS
8225 with 4-20 mA, 2 Relays EPDM K=0,01 2xG 1/2" 418986
8225 with 4-20 mA, 2 Relays EPDM K=0,1 2xG 1/2" 418987
8225 with 4-20 mA, 2 Relays EPDM K=1,0 2xG 1/2" 418988
8225 with 4-20 mA, 2 Relays EPDM K=10 2xG 1/2" 418989

E-4-
CONDUCTIVITY 8225
Fluid Control Systems
Conductivity transwithter Gasket Sensor Cable entry Ident N°
STANDARD TYPES WORLWIDE
8225 with 4-20 mA FPM K=0,01 2XPG 13,5 426935
8225 with 4-20 mA FPM K=0,1 2XPG 13,5 426936
8225 with 4-20 mA FPM K=1,0 2XPG 13,5 426937
8225 with 4-20 mA FPM K=10 2XPG 13,5 426938
8225 with 4-20 mA EPDM K=0,01 2XPG 13,5 426939
8225 with 4-20 mA EPDM K=0,1 2XPG 13,5 426940
8225 with 4-20 mA EPDM K=1,0 2XPG 13,5 426941
8225 with 4-20 mA EPDM K=10 2XPG 13,5 426942
STANDARD TYPES WORLWIDE WITH RELAYS
8225 with 4-20 mA, 2 Relays FPM K=0,01 2xPG 13,5 426943
8225 with 4-20 mA, 2 Relays FPM K=0,1 2xPG 13,5 426944
8225 with 4-20 mA, 2 Relays FPM K=1,0 2xPG 13,5 426945
8225 with 4-20 mA, 2 Relays FPM K=10 2xPG 13,5 426946
8225 with 4-20 mA, 2 Relays EPDM K=0,01 2xPG 13,5 426947
8225 with 4-20 mA, 2 Relays EPDM K=0,1 2xPG 13,5 426948
8225 with 4-20 mA, 2 Relays EPDM K=1,0 2xPG 13,5 426949
8225 with 4-20 mA, 2 Relays EPDM K=10 2xPG 13,5 426950
STANDARD TYPES NORTH AMERICA
8225 with 4-20 mA FPM K=0,01 2xG 1/2" 426951
8225 with 4-20 mA FPM K=0,1 2xG 1/2" 427864
8225 with 4-20 mA FPM K=1,0 2xG 1/2" 427865
8225 with 4-20 mA FPM K=10 2xG 1/2" 427866
8225 with 4-20 mA EPDM K=0,01 2xG 1/2" 427867
8225 with 4-20 mA EPDM K=0,1 2xG 1/2" 427868
8225 with 4-20 mA EPDM K=1,0 2xG 1/2" 427869
8225 with 4-20 mA EPDM K=10 2xG 1/2" 427870
STANDARD TYPES NORTH AMERICA WITH RELAYS
8225 with 4-20 mA, 2 Relays FPM K=0,01 2xG 1/2" 427871
8225 with 4-20 mA, 2 Relays FPM K=0,1 2xG 1/2" 427872
8225 with 4-20 mA, 2 Relays FPM K=1,0 2xG 1/2" 427983
8225 with 4-20 mA, 2 Relays FPM K=10 2xG 1/2" 427984
8225 with 4-20 mA, 2 Relays EPDM K=0,01 2xG 1/2" 427985
8225 with 4-20 mA, 2 Relays EPDM K=0,1 2xG 1/2" 427986
8225 with 4-20 mA, 2 Relays EPDM K=1,0 2xG 1/2" 427987
8225 with 4-20 mA, 2 Relays EPDM K=10 2xG 1/2" 427988
2 SPECIFICATION
2.1.2 Transmitter 8225 with 115/230 VAC power supply

E-5-
CONDUCTIVITY 8225
Fluid Control Systems
2 SPECIFICATION
Measuring Principle
Conductivity is defined as the ability of a
solution to conduct electrical current. The
load carriers are ions (e.g. dissolved salts
or acids). In order to measure the
conductivity, 2 electrodes are used which
are set at a fixed distance apart and with a
known specified surface. An AC voltage
source is connected to the electrodes. The
measured current is a direct function of the
conductivity of the solution.
Thetransducerwithout relaysfunctionshas
a 2-wire circuit and requires a power supply
of 12-30 VDC. The device is available with
anintegratedpower supply of 115/230 VAC.
A standard output signal of 4-20 mA is
available, although it is proportional to the
conductivity.
The transducer with 2 additional relays has
a 3-wire circuit. Limit values are freely
adjustable.
2.2 Design and Measuring Principle
Design
The compact conductivity transmitter
combines a sensor and a transducer with
display in a splash-proof plastic IP65
enclosure.
The sensor component consists of easily
replaceable sensors. Sensors with cell
constants of 0.01 and 0.1 are fitted with
stainless steel electrodes, and those with a
higher cell constant 1.0 and 10 are fitted
with graphite electrodes. The Pt1000 for
automatic temperature compensation is a
standard feature in all sensor housings.
The transducer component converts the
measured signal and displays the actual
value.
The output signal is provided within a 4-
pole plug according to DIN 43 650 or via
one PG 13.5 (version without relays) or via
2 PG 13.5 (version with relays).

E-6-
CONDUCTIVITY 8225
Fluid Control Systems
2.3 Dimensions
2 SPECIFICATION
1/2" G
Version:
"WORLDWIDE"
See part 2.1
1/2" G
Version:
"NORTH AMERICA"
See part 2.1

E-7-
CONDUCTIVITY 8225
Fluid Control Systems
2 SPECIFICATION
2.4 Technical Data
Pressure class PN 6
Fluid temperature 0 to 100 °C (32 to 212 °F) (*)
Ambient temperature 0 to 60 °C (32 to 140 °F)
Storing temperature 0 to 60 °C (32 to 140 °F)
Relative humidity max. 80 %
Enclosure IP 65
Measuring range 0,05 µS/cm...200 mS/cm, depending on cell constant
Measuring error typical: 3 % of measured value
max.: 5 % of measured value
Temperature compensation automatic with standardized integrated Pt1000 with
reference temperature of 25 °C (77 °F)
Supply Voltage 12-30 VDC or 115/230 VAC
Output signal 4-20 mA
Load max. 700 Ohm at 30 V
max. 400 Ohm at 24 V
max. 100 Ohm at 15 V
Display 15 x 60 mm LCD 8 digits, alphanumeric,
15 segments, 9 mm high
Relay output (optional) 2 relays, 3 A, 230 V, freely adjustable
Sensor housing PVDF
O-rings FPM/EPDM
Electronic housing PC
Front plate polyester
Measuring electrodes K=0.01 stainless steel electrodes
K=0.1 stainless steel electrodes
K=1.0 graphite electrodes
K=10 graphite electrodes
(*) Refer to fittings instruction manual.

E-8-
CONDUCTIVITY 8225
Fluid Control Systems
2 SPECIFICATION
2.5 Measuring range of electrodes
K = 0.1 und K = 0.01 K = 10K = 1.0
The conductivity transmitter can be fitted
with4differentelectrodeswith cell constants
0.01; 0.1; 1.0 and 10. The electrode is
selected according to the measuring range
and medium by using the table below.
µS/cm mS/cm
0.02 0.05
0.1
0.2 0.5
1
25
10
20 50
100
200 50025
10
20 50
100
200 500
K=0.01
K=0.1
K=1.0
K=10
MΩ.cm KΩ.cm
50 20
10
52
1
0.5 0.2
0.1
0.05 0.02
0.01
0.0020.005
1
0.5 0.2
0.1
0.05 0.02
0.01
0.0020.005
pure water industrial water concentrated solutions
Fig. 2.1 Measuring ranges of electrodes
sewage
water
ultra-
pure
water

E-9-
CONDUCTIVITY 8225
Fluid Control Systems
-50 -30 -10 +10 +30 +50 +70 +90 +110 +130
0
2
1
3
4
5
6
7
8
9
10
PVC + PP
PVDF
PVDF (PN 6)
PVC (PN 6)
PP (PN 6)
3 INSTALLATION
3.1 Installation Guidelines
Pressure-Temperature Diagram
Please be aware of the pressure-
temperature dependence according to the
respective fitting material.
Installation Guidelines
The conductivity transmitter must be
installed in a vertical position onto a
horizontal pipe or a weld-in fitting must be
usedthroughatankwalltoobtainthevertical
position.
With a cell constant K=10, the opening hole
of the small channel must be located on the
flow side.
The device must be protected against
constant heat radiation and other
environmentalinfluences,suchas magnetic
fields or direct exposure to sunlight.
Do not mount the device behind turbulence
generating fittings such as elbows, valves,
T-pieces, etc..
Caution: only tighten the plastic nut by hand
3.2 Installation
The conductivity transmitter 8225 can be
easilyinstalled into pipes using ourspecially
designed fitting system. (S020/1500)
1.The fitting must be installed into the
pipe according to the installation
specifications in section 3.1.
2.Insert the plastic nut onto the fitting
and let the plastic ring snap into the
guide bush .
3.Carefully insert the transmitter 8225 
into the fitting. If installed correctly, the
transmitter cannot be rotated.
4.Tighten transmitter housing to the fitting
with the plastic nut .
Application range
Fig. 3.1 Installation on a fitting S020

E-10-
CONDUCTIVITY 8225
Fluid Control Systems
3 INSTALLATION
3.3 General Electrical Connection
The connecting cable conducts the
measuring signal and power supply and
must not be installed in combination with
high voltage or high frequency lines. If a
combined installation cannot be avoided,
either keep a min. space of 30 cm (approx.
1 ft) or use coax cables. When using coax
cables observe faultless grounding of the
shield. For normal operating conditions, the
measuring signal can be transmitted by a
simple cable of 0.75 mm2 cross section.
If in doubt, always use a coax cable.
The power supply must be of good quality
(filtered and regulated).
Anearthingpoint is providedviaan earth
lug on the side of the enclosure (see fig.
3.1). For EMC purposes, this point must
be connected locally to a good earth.
3.4 Electrical Wiring 12-30 VDC
3.4.1 8225 without relays
Electrical wiring either via cable plug to DIN
43 650 or PG 13.5 cable gland.
Wiring via cable plug
Standard DIN 43 650 plug connector with
PG9-cable glands, cross section max. 1.5
mm2, IP65 rating (cf. fig. 3.2).
1.To open the connector remove the screw
(cf. fig. 3.2).
2.Remove internal part from external
part .
3.Connect according to the pin assignment
in fig. 3.3.
4.When re-assembling, the internal part
may be inserted into the plastic case in
90 °-step intervals as required.
Fig. 3.2 Plug assembly DIN43650 Fig. 3.3 Connection with cable plug
댷
1
2
3
훰훫훫
훫훫훱
훫훫훱
훫훫훱
L+(12-30 VDC)
L-(GND)
Not
assigned
Not assigned