Burkert 8225 User manual

CONDUCTIVITY 8225
8225 E-1-
TABLE OF CONTENTS
1 INTRODUCTION ....................................................................................................................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
2 SPECIFICATION ....................................................................................................................E-3
2.1 Type specifications short distance ........................................................................................................................... E-3
2.1.1 Conductivity transmitter type 8225 short distance .......................................................................................... E-3
2.1.2 Sensor designation type 8220 short distance ................................................................................................. E-3
2.2 Type specifications long distance ............................................................................................................................. E-4
2.2.1 Conductivity transmitter type 8225 long distance ........................................................................................... E-4
2.2.2 Sensor designation type 8220 long distance .................................................................................................. E-4
2.3 8220 Sensor measuring range ................................................................................................................................. E-5
2.4 Design and Measuring Principle ............................................................................................................................... E-6
2.5 Technical Data .......................................................................................................................................................... E-7
3 INSTALLATION ......................................................................................................................E-8
3.1 Installation Guidelines ............................................................................................................................................... E-8
3.2 8220 Sensor installation............................................................................................................................................ E-8
3.3 Transmitter installation .............................................................................................................................................. E-9
3.3.1 Panel version .................................................................................................................................................. E-9
3.3.2 Wall-mounted version installation ................................................................................................................. E-10
3.4 Electrical connection ............................................................................................................................................... E-10
3.4.1 General electrical requirements .................................................................................................................... E-10
3.4.2 Connection of 4-20 mA output to a PLC ....................................................................................................... E-11
3.5 Electrical wiring 8225 Transmitter Short distance ................................................................................................ E-11
3.5.1 Connection of the 8220 Sensor to the 8225 Transmitter ............................................................................. E-11
3.5.2 8225 Transmitter panel version without relay ............................................................................................... E-12
3.5.3 8225 Transmitter panel version with relays .................................................................................................. E-13
3.5.4 8225 Transmitter wall-mounted version 12-30 VDC .................................................................................... E-14
3.5.5 8225 Transmitter wall-mounted version 115-230 VAC ................................................................................. E-15
3.6 Electrical wiring 8225 Transmitter long distance .................................................................................................. E-15
3.6.1 Connection of the 8220 Sensor to the 8225 Transmitter ............................................................................. E-16
3.6.1 8225 Transmitter panel version without relay ............................................................................................... E-16
3.6.2 8225 Transmitter panel version with relays .................................................................................................. E-16
3.6.3 8225 Transmitter wall-mounted version 12-30 VDC .................................................................................... E-17
3.6.4 8225 Transmitter wall-mounted version 115-230 VAC ................................................................................. E-18
4 OPERATION ........................................................................................................................ E-19
4.1 Transmitter Operating and Control Elements ........................................................................................................ E-19
4.2 Operation Mode Display ......................................................................................................................................... E-20
4.3 Calibration Mode ..................................................................................................................................................... E-21
4.3.1 Language ....................................................................................................................................................... E-21
4.3.2 Engineering Units ........................................................................................................................................... E-22
4.3.3 Cell Constant .................................................................................................................................................. E-22
4.3.4 Temperature-Compensation Coefficient ....................................................................................................... E-24
4.3.5 Output Current ............................................................................................................................................... E-24
4.3.6 Relay .............................................................................................................................................................. E-24
4.3.7 Filter Function ................................................................................................................................................ E-24
4.4 Test Menu ................................................................................................................................................................ E-26
4.4.1 Offset-Compensation ..................................................................................................................................... E-26
4.4.2 Span-Compensation ...................................................................................................................................... E-27
4.4.3 Display of non-compensated Conductivity .................................................................................................... E-27
4.4.4 Conductivity-Simulation ................................................................................................................................. E-27
5 MAINTENANCE ................................................................................................................... E-28
5.1 Storing and Cleaning of the Electrode ................................................................................................................... E-28
5.2 Trouble-shooting ..................................................................................................................................................... E-28
5.3 Factory-settings of 8225 Transmitter at delivery .................................................................................................... E-28
5.4 Spare parts .............................................................................................................................................................. E-29
APPENDIX ................................................................................................................................... G-1
Dimensions ................................................................................................................................................................G-1
Examples of connection conductivity transmitter type 8225 ...................................................................................G-4

CONDUCTIVITY 8225
8225
E-2-
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
andfree fromany damageandthat youhave
recieved the following as a standard
delivery:
A) Transmitter short distance
-1 8225 Digital conductivity transmitter
-1 8220 Sensor short distance
-1 Operating instruction manual
or
B) Transmitter long distance
-1 8225 Digital conductivity transmitter
-1 8220 Sensor long distance
-1 Operating instruction manual
To ensure that you have recieved the
product required, please compare the Type
specification(Bürkert identificationnumber)
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 properly trained staff. If any
difficultiesmay occurwiththe productduring
installation,please donothesitate 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
thetransmitter andthe fluids/mediumwhich
maybe in direct contact with the product.
If this symbol 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 Council of European Communities
89/336/EEC.
In order to comply with the above directive,
the wiring instructions must be followed as
instructed.ust be followed.

CONDUCTIVITY 8225
8225 E-3-
2.1 Type specifications short distance
2.1.1 Conductivity transmitter type 8225 short distance
8225 Conductivity transmitter panel version
Type Output Power Supply Order Nr
8225 4...20 mA 12-30 VDC 426830
8225 4...20 mA, 2 relays 12-30 VDC 426831
8225 Conductivity transmitter wall-mounted version
Type Output Power Supply Order Nr
8225 4...20 mA, 2 relays 12-30 VDC 426834
8225 4...20 mA 12-30 VDC 426835
8225 4...20 mA, 2 relays 230 VAC 426836
8225 4...20 mA 230 VAC 426837
2 SPECIFICATION
Conductivity electrode for conductivity
transmitter 8225 remote versions.
These sensors are fitted with a Pt1000
and a standard DIN43650 plug connector
for the connection to conductivity
transmitter 8225 remote versions.
2.1.2 Sensor type 8220 short distance
SHORT Dist. Range Cell Order Nr
FPM min max Constant Material
8220  0.05 µS/cm 20 µS/cm 0,01 SS 426872
8220 0.5 µS/cm 200 µS/cm 0,1 SS 426873
8220 5 µS/cm 10 mS/cm 1 Graphite 426874
8220 0.5 mS/cm 200 mS/cm 10 Graphite 426875
EPDM min max Constant Material
8220  0.05 µS/cm 20 µS/cm 0,01 SS 426876
8220 0.5 µS/cm 200 µS/cm 0,1 SS 426877
8220 5 µS/cm 10 mS/cm 1 Graphite 426878
8220 0.5 mS/cm 200 mS/cm 10 Graphite 426879
Please note the cell constant of the 8220 conductivity sensor to allow the setting of the
8225 remote transmitter (cf §4.3.3)

CONDUCTIVITY 8225
8225
E-4-
2 SPECIFICATION
2.2 Type specifications long distance
2.2.1 Conductivity transmitter type 8225 long distance
8225 Conductivity transmitter panel version
Type Output Power Supply Order Nr
8225 4...20 mA 12-30 VDC 426832
8225 4...20 mA, 2 relays 12-30 VDC 426833
8225 Conductivity transmitter wall-mounted version
Type Output Power Supply Order Nr
8225 4...20 mA, 2 relays 12-30 VDC 426838
8225 4...20 mA 12-30 VDC 426839
8225 4...20 mA, 2 relays 230 VAC 426840
8225 4...20 mA 230 VAC 426841
2.2.2 Sensor type 8220 long distance
Conductivity electrode for conductivity
transmitter 8225 remote versions.
These sensors are fitted with a Pt1000
and an analogue to digital converter type
8221 for the connection to the
conductivity transmitter 8225 remote
versions
Power supply:
10 VCC
Converter output:
0-5 V.
LONG Dist. Range Cell Order Nr
FPM min max Constant Material
8220  0.05 µS/cm 20 µS/cm 0,01 SS 426880
8220 0.5 µS/cm 200 µS/cm 0,1 SS 426881
8220 5 µS/cm 10 mS/cm 1 Graphite 426882
8220 0.5 mS/cm 200 mS/cm 10 Graphite 426883
EPDM min max Constant Material
8220  0.05 µS/cm 20 µS/cm 0,01 SS 426884
8220 0.5 µS/cm 200 µS/cm 0,1 SS 426885
8220 5 µS/cm 10 mS/cm 1 Graphite 426886
8220 0.5 mS/cm 200 mS/cm 10 Graphite 426887
Please note the cell constant of the 8220 conductivity sensor to allow the setting of the
8225 remote transmitter (cf §4.3.3)

CONDUCTIVITY 8225
8225 E-5-
2 SPECIFICATION
K = 0.1 and K = 0.01 K = 10K = 1.0
The conductivity transmitter can be connected to 4 different sensors with cell constants
0.01; 0.1; 1.0 and 10. Select the conductivity sensor according to the measuring range and
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 sewage
water
Fig 2.1 Measuring ranges of electrodes
ultra-
pure
water



2.3 8220 Sensor measuring range

CONDUCTIVITY 8225
8225
E-6-
2 SPECIFICATION
2.4 Design and Measuring Principle
Design
The conductivity transmission system
combines a sensor type 8220, and a 8225
remote transmitter with display.
The 8225 remote transmitter is available
in panel mounted version and in a wall-
mounted plastic IP65 enclosure for both
short and long distance connection to the
sensor.
The 8225 conductivity transmitter output
signal is a standard 4-20 mA signal.
Option: 2 Relay outputs freely adjustable.
The 8220 conductivity sensors with cell
constants 0.01 and 0.1 are fitted with
stainless steel electrodes, and those with
cell constants 1.0 and 10 are fitted with
graphite electrodes. The Pt1000 for
automatic temperature compensation is a
standard feature in all sensor housings.
The 8220 conductivity sensor is available in
short distance or long distance feature.
A) The 8220 sensor short distance is
provided with a 4 pin connector. The
analogue output signal can be transmitted
up to 5 meters via a 4x1,5 mm2 cable.
B) The 8220 sensor long distance is
provided with a signal converter type 8221.
The 8221 signal converter converts the
measured signal of the sensor into a digital
signal. This signal can be transmitted up to
500 m via a shielded transmission line.
Measuring Principle
The 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
conductivity, two electrodes are used at
a fixed distance apart and with a specific
surface. A voltage source is connected
to the electrodes. The measured current
is a direct function of the conductivity of
the solution.
The transmitter with or without relays
functions in a 3-wire circuit. The
thresholds and direction of action are
freely adjustable.

CONDUCTIVITY 8225
8225 E-7-
2 SPECIFICATION
2.5 Technical Data
8225 Transmitter specification
Ambient temperature 0 to 60 °C (32 to 140 °F)
Storing temperature 0 to 60 °C (32 to 140 °F)
Relative humidity 80 % max.
Enclosure Wall-mounted version IP 65 ; ABS
Panel version IP 20 (rear plate); IP65 (front plate); PC
Power supply: 12...30 VDC (115/220 VAC Option wall-mounted version)
Consumption:
Short distance 20 mA (without relay); or 80 mA (with relays)
Long distance 60 mA (without relay); or 100 mA (with relays)
Output signal: 4...20 mA programmable; proportional to the conductivity.
Load Short Long distance
max. (Ohm) 700 1100 at 30 V
max. (Ohm) 400 910 at 24 V
max. (Ohm) 100 470 at 15 V
Display 15 x 60 mm LCD 8 digits, alphanumeric,
15 segments, 9 mm high
Relay output (optional) 2 relays, 3 A, 220 VAC, freely adjustable
8220 Sensor specification
Pressure class PN 6
Fluid pressure max. 10 bar (145 psi)
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)
Enclosure IP 65
Sensor housing PVDF
Electronic housing PC
O-ring FPM/EPDM
Temperature compensation automatic with standardized integrated Pt1000 with
reference temperature 25 °C (77 °F)
Measuring range 0,05 µS/cm...200 mS/cm, depending on cell constant
Measuring error typical: 3% of the measured value
max.: 5% of the measured value
Measuring electrodes K=0.01stainless steel electrodes
K=0.1 stainless steel electrodes
K=1.0 graphite electrodes
K=10 graphite electrodes
Signal cable length between 8220 Sensor and 8225 Transmitter:
Short distance: max 5 m
Long distance: max 500 m

CONDUCTIVITY 8225
8225
E-8-
3 INSTALLATION
3.1 Installation Guidelines
Pressure-Temperature-Diagram
Mind pressure-temperature dependence
according to the respective fitting material.
Installation Guidelines
Mount the conductivity sensor in vertical
position (max. +/- 90 °) into a horizontal
pipe, or use an immersion or weld-in fitting
to mount it horizontally through a tank wall.
With a cell constant K=10, the opening hole
of the small channel must be located on the
upstream side.
The device must be protected against
constant heat radiation and other
environmentalinfluences, suchas magnetic
fields or direct exposure to sunlight.
Do not mount behind turbulence generating
fittings (elbows, valves, T-pieces, etc.).
3.2 Sensor installation
The conductivity sensor 8220 can be easily
installed into pipes using our specially
designed fitting system.
1.Installthe fittingintothe pipeaccording
to the mounting specifications in §3.1.
2.Insert the plastic nut into the fitting
and let plastic ring snap into the guide
bush .
3.Carefully insert the conductivity sensor
8220 into the fitting. If installed
properly, the sensor cannot be rotated.
4.Tighten transmitter housing to the fitting
with the plastic nut .
5. Screw the cable plug or the signal
converter 8221on the top of the
conductivity sensor .
Caution! Plasticnut mustonly betightened
by hand! Fig 3.1 Installation 8220 Sensor
-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)
Nominal range

CONDUCTIVITY 8225
8225 E-9-
3 INSTALLATION
Front panel
3.3.1 Panel version installation
For the cut-away of the front panel, follow the instructions on the enclosed delivery film.
Install the transmitter as follows:
1. Put gasket on the cover and place the complete unit in the panel cut-away.
2. Screw the spacer bolts on the panel fixing screws .
3. Insert the cable clips , to hold the different cables (power supply, outputs, sensor)
of the transmitter, into plate .
4. If a PLC is connected to the device, set the switch SW300 (cf §3.4)
5. Plug connector on socket and fasten plate with screws on bolts , tightening
the lockwashers .
3.3 Transmitter installation
Fig 3.2 Installation 8225 Transmitter panel version

CONDUCTIVITY 8225
8225
E-10-
3 INSTALLATION
3.3.2 Wall-mounted version installation
The conductivity transmitter in wall-mounted version has 4 fixing holes in the bottom
enclosure. Remove the white blanking strips and the cover to access to fixing holes . For
conductivity sensor installation, see §3.2.



230
Fuse
125 mA T Switch for power
supply selection
230/115 VAC
3.4 Electrical connection
3.4.1 General electrical requirements
The connecting cable conducts the measuring signal and must not be installed in
combination with high voltage or high frequency carrying lines. If a combined installation
cannot be avoided, either keep a min. space of 30 cm (approx. 1 ft) or use shielded cables.
When using shielded cables observe continuous grounding of the shield. For normal
operating conditions, the 4-20 mA output, an relays signals can be transmitted by a simple
cable of 0.75 mm2 . In case of doubt, always use a shielded cable.
The power supply must be of good quality (filtered and regulated).
!
For EMC purposes,the earth must
be connected to the transmitter .
Fig 3.3 Installation 8225 Transmitter wall-mounted version

CONDUCTIVITY 8225
8225 E-11-
3 INSTALLATION
The 4-20 mA output of the transmitter 8225 can be easily connected to a PLC,
independently of the respective version. Set the switch SW300 of the 8225 Transmitter
Wall mounted version, according to PLC type.
3.4.2 Connection of 4-20 mA output to a PLC
3.5.1 Connection of the 8220 Sensor to the 8225 Transmitter
Fig 3.6 Connection of the 8220 Sensor
to the transmitter 8225 Short distance.
0V
V+
4...20 mA
L-
8225 L+ 8225 V+
L+
4...20 mA
0V
L-
Position A Position B
11
10
12
11
10
12
Fig 3.4 Switch position of the 8225 Wall-mounted type for connection to a PLC.
댷
1
2
3
Fig 3.5 Plug assembly
1. Remove the screw  to open the
connector.
2. Remove internal part from external
part .
3. Connect according to above pin
assignment.
4.When re-assembling, the internal part
may be inserted into the external part in
90 °-step intervals as required.
3.5 Electrical wiring 8225 Transmitter panel - Short distance
Electrical wiring via cable plug connector
The signal output of the 8220 conductivity
sensoris connectedto the8225 Transmitter
via a 4 wire shielded cable.Standard DIN
43 650 plug connector with PG9-cable
glands, insulation cross section max. 1.5
mm2, IP65 rating (cf. Fig 3.6).

CONDUCTIVITY 8225
8225
E-12-
1234
3 INSTALLATION
Note: PLC-connection. Depending on the PLC-version, the switch on the circuit board
must be put to position A or B (see Fig 3.4 and 3.7).
Electronic card connector
Pins connection:
1:not connected
2: L+ (12-30 VDC)
3: L-
4: Earth (Earth lug)
Sensor connection
Short distance
3.5.2 8225 Transmitter panel without relay - Short distance
1
2
3
쵰
8220
Short distance
Fig 3.8 Connection card 8225 without relay - Short distance
Fig 3.7 Electronic card 8225 without relay - Short distance
Sensor connection:

CONDUCTIVITY 8225
8225 E-13-
3 INSTALLATION
Note: PLC-connection, depending on the PLC-version, the switch on the circuit board
must be set in position A or B (see Fig. 3.4 and 3.9).
Short distance
3.5.3 8225 Transmitter panel with relays - Short distance
Sensor connection
Strap
1
2
3
쵰
8220
Electronic card connector
Pins connection:
1: 4...20 mA
2: L+ (12-30 VDC)
3: L-
4: Earth (earth lug)
5: Relay 2
6: Relay 2
7: Relay 1
8: Relay 1
Short distance
1234
56 78
Fig 3.10 Connection card 8225 with relays - Short distance
Fig 3.9 Electronic card 8225 with relays
Sensor connection:
Note: 4-20 mA output connection; remove
the strap (1-3).

CONDUCTIVITY 8225
8225
E-14-
3 INSTALLATION
Open the cover to access to the terminals. Wire according to the following figures,
depending on the transmitter version.
1
2
3
쵰
8220
Earth (PE)
Spare
Spare
Spare
Spare
Short distance
1
2
3
쵰
8220
Earth (PE)
Spare
Spare
Spare
Spare
PLC POWER 12/30V
Fig 3.12 12..30 VDC Power supply- with relays - Short distance
PLC
Fig 3.11 12..30 VDC Power supply - without relay - Short distance
3.5.4 Electrical wiring 8225 wall-mounted 12-30 VDC - Short distance
RELAY SPARE
Spare
Spare
Spare
Spare
Spare
Spare
Spare
RELAY SPARE
Output Rel 2
Output Rel 2
Output Rel 1
Output Rel 1
Spare
Spare
Spare
Spare
Output (4-20 mA)
L+ (12-30 VDC)
L- (12-30 VDC)
POWER 12/30V
Spare
Output (4-20 mA)
L+ (12-30 VDC)
L- (12-30 VDC)
Short distance

CONDUCTIVITY 8225
8225 E-15-
3 INSTALLATION
!
Warning: Check the position of the power supply selection switch, before starting
the device (fig 3.3). Connect the shield of the cable to the earth terminal 5.
Open the cover to access to the terminals. Wire according to the following figures,
depending on the transmitter version.
1
2
3
쵰
8220
Earth (PE)
Spare
Spare
Spare
Spare
PLC
Fig 3.14 115..230 VAC Power supply - with relays - Short distance
1
2
3
쵰
8220
Short distance
Fig 3.13 115..230 VAC Power supply - without relay- Short distance
PLC 115/230 VAC
3.5.5 Electrical wiring 8225 wall-mounted 115-230 VAC - Short distance
Output (4-20 mA)
cf Fig. 3.4
Earth (PE)
Spare
Spare
Spare
Spare
PLC PLC RELAY 115/230 VAC
Output (4-20 mA)
cf Fig. 3.4
Output Rel 2
Output Rel 2
Output Rel 1
Output Rel1
PE
N
L1
Spare
Spare
Spare
Spare
PE
N
L1
Short distance

CONDUCTIVITY 8225
8225
E-16-
Note: PLC-connection, depending on the
PLC-version, the switch on the circuit
board must be set in position A or B (see
Fig. 3.4 and 3.16).
Electronic card connector
Pins connection:
1: 4...20 mA
2: L+ (12-30 VDC)
3: L-
4: Earth (earth lug)
5: Relay 2
6: Relay 2
7: Relay 1
8: Relay 1
PLC Switch
Sensor connection
Long distance
3.6.2 Electrical wiring 8225 panel with relays - Long distance
Fig 3.16 Electronic card 8225 with relays
3 INSTALLATION
Note: PLC-connection. Depending on the PLC-version, the switch on the circuit board
must be put to position A or B (see Fig 3.4 and 3.15).
Electronic card connector
Pins connection:
1: 4...20 mA
2: L+ (12-30 VDC)
3: L-
4: Earth (Earth lug)
PLC Switch
Sensor connection
Long distance
3.6.1 Electrical wiring 8225 Transmitter panel without relay - Long distance
Fig 3.15 Electronic card 8225 without relay
3.6 Electrical wiring 8225 Transmitter panel - Long distance

CONDUCTIVITY 8225
8225 E-17-
3 INSTALLATION
Fig 3.17 12..30 VDC Power supply - without relay - Long distance
POWER12/30V SPARERELAY
PLC
Spare
Spare
Spare
Spare
Spare
Spare
Spare
CONVERTER
Earth (PE)
Spare
Spare
Spare
Spare
+ 10 VDC
0 VDC
Digital input A
Digital input B
Spare
Output (4-20 mA)
L+ (12-30 VDC)
L- (12-30 VDC)
Openthe covertoaccess to theterminals.Wire accordingto thefollowingfigures, depending
on the transmitter version.
3.6.3 Electrical wiring 8225 wall-mounted 12-30 VDC - Long distance
Long distance
Fig 3.18 12..30 VDC Power supply- with relay - Long distance
POWER12/30V
PLC RELAY SPARE
CONVERTER
Earth (PE)
Spare
Spare
Spare
Spare
+ 10 VDC
0 VDC
Digital input A
Digital input B
Output Rel 2
Output Rel 2
Output Rel 1
Output Rel 1
Spare
Spare
Spare
Spare
Output (4-20 mA)
L+ (12-30 VDC)
L- (12-30 VDC)
Long distance

CONDUCTIVITY 8225
8225
E-18-
3 INSTALLATION
Long distance
Output (4-20 mA)
cf Fig. 3.4
PLC 115/230 VAC
PLC
+ 10 VDC
0 VDC
Digital input A
Digital input B
!
Warning: Check the position of the power supply selection switch, before starting
the device (fig 3.3). Connect the shield of the cable to the earth terminal 5.
CONVERTER
Openthe covertoaccess tothe terminals.Wireaccording tothefollowing figures,depending
on the transmitter version.
3.6.4 Electrical wiring 8225 wall-mounted 115-230 VAC - Long distance
Long distance
PLC RELAY
PLC 115/230 VAC
CONVERTER
Output (4-20 mA)
cf Fig. 3.4
+ 10 VDC
0 VDC
Digital input A
Digital input B
Output Rel 2
Output Rel 2
Output Rel 1
Output Rel1
PE
N
L1
Fig 3.20 115..230 VAC Power supply - with relay - Long distance
Fig 3.19 115..230 VAC Power supply - without relay - Long distance
Earth (PE)
Spare
Spare
Spare
Spare
Spare
Spare
Spare
Spare
Spare
PE
N
L1
Earth (PE)
Spare
Spare
Spare
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CONDUCTIVITY 8225
8225 E-19-
4 OPERATION
4.1 Transmitter Operating and Control Elements
The operation of the transmitter is classified according to three levels.
All menus and functions are identical whatever the version may be.
Display
Conductivity, temperature and output current are indicated in this level. The "HOLD"
function can be accessed in this menu.
Parameter Definition
Allthe necessaryadjustments, suchaslanguage, technicalunits,cell constant,temperature
compensation factor, 4...20 mA measuring range, relay (if any) and filter are set in this
level.
Test
A conductivity can be simulated via this menu, allowing a process to be tested in the "dry
condition".
The non-compensated conductivity of the transmitter is also displayed in this menu.
The basic settings (Offset, Span) of the device can be changed in this menu.
125.6
m
S
Relay 1: contact closed
Relay 2: contact closed
Acceptance of chosen
parameter or adjusted
value
Direction downwards
in menu or sideways
for digit selection
Display selection
and
Increasing key
(numeric values)
impulses or
automatic

CONDUCTIVITY 8225
8225
E-20-
4 OPERATION
Conductivity in the required technical unit. If "0000" or "9999" is
displayed, input value is to low, respectively to high, change unit
or decimal point position
HOLD-function. If this function is activated, the transmitter
generatesan outputcurrentcorresponding tothe lastvaluebefore
this option was entered. The relays are locked in their last state.
This allows the electrode to be cleaned without interruption of
the process. The display in the operation mode is flashing and
there is no access to the parameter definition or the test menu,
as long as the HOLD-function is activated.
ENTER
ENTER
HOLD
HOLD NO
HOLD YES
Press Enter for
5 seconds
Outputsignal 4...20mA,proportional tothe conductivityaccording
to the selected measuring range.
Temperature in °C or °F. If "----°C" or "----°F" is displayed,
temperature is out of range (-50...+150) or connection with Pt
1000 is interrupted.
To disactivate HOLD function, enter again "HOLD" option and
confirm "HOLD NO".
4.2 Operation Mode Display
The following units are indicated in the operation mode display:
12,6 mS
20.6 °C
HOLD
16.45 mA
12.5 m S