Burkert 8223 User manual
Instruction Manual
8223
INDUCTIVE CONDUCTIVITY SENSOR
© Bürkert 2001 Subject to technical change without notice
28223
ENGLISH
INTRODUCTION
Table des matières
INTRODUCTION............................................................................................................... 2
1.1 Symbol used .............................................................................................................. 3
1.2 General safety instructions .................................................................................... 3
QUICK START................................................................................................................... 4
2.1 Quick installation guide........................................................................................... 4
CONFIGURATION............................................................................................................ 6
3.1 General comments................................................................................................... 6
3.2 Measuring range....................................................................................................... 6
3.2.1 Measuring range of the conductivity............................................................................6
3.2.2 Measuring range of the temperature...........................................................................8
3.3 Filtering level.............................................................................................................. 9
3.4 Temperature compensation .................................................................................10
3.4.1 Specific compensation......................................................................................................... 10
3.4.2 Linear compensation............................................................................................................. 11
3.5 Transmission of the temperature.........................................................................12
3.6 Calibrating the “zero conductivity” point...........................................................12
INSTALLATION ...............................................................................................................13
4.1 Mounting instructions............................................................................................13
4.1.1 Temperature-pressure diagram..................................................................................... 13
4.1.2 Installation recommendations......................................................................................... 13
4.2 Mounting...................................................................................................................14
4.3 Electrical connection instructions.......................................................................15
4.3.1 Mounting and connection of the EN 175301-803 connector........... 15
4.3.2 Connecting the 8223 to an external device (PLC,...) ..................................16
4.3.3 Precautions during installation and commissioning.....................................16
4.4 Examples of connections with a 8223 sensor.........................................................17
MAINTENANCE..............................................................................................................18
5.1 Maintenance ............................................................................................................18
5.2 If a problem occurs................................................................................................18
TECHNICAL DATA .........................................................................................................20
6.1 Process characteristics.........................................................................................20
6.2 Electrical characteristics.......................................................................................20
6.3 User characteristics...............................................................................................21
6.4 Safety ........................................................................................................................21
6.5 Environment.............................................................................................................21
6.6 Conformity with standards ...................................................................................21
6.7 Dimensions (mm)....................................................................................................22
INFORMATION...............................................................................................................23
7.1 Standard delivery....................................................................................................23
7.2 Ordering table for sensors 8223........................................................................23
7.3 Ordering table for spare parts.............................................................................23
7.4 Measurement principle..........................................................................................24
7.5 Label description....................................................................................................24
7.6 Declaration of conformity......................................................................................26
3
8223
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INTRODUCTION
1.1 SYMBOL USED
Indicates information which must be followed. Failure to follow the infor-
mation could endanger the user and affect the function of the device.
1.2 GENERAL SAFETY INSTRUCTIONS
Before installing or using this product, please read this manual and any
other relevant documentation to ensure you fully benefit from all the
advantages the product can offer.
- Please verify that the product is complete and free from any damage.
- It is the customer's responsibility to select an appropriate sensor for the
application, ensure the unit is installed correctly, and maintain all components.
- This product should only be installed or repaired by specialist staff using the
correct tools.
- Please observe the relevant safety regulations throughout the operation,
maintenance and repair of the product.
- Always ensure that the power supply is switched off and the pipes / tank do
not contain any pressure before working on the device / system.
- This electronic device is sensitive to electrostatic discharge. To avoid any
damage by immediate electrostatic discharge, pay attention to the
requirements of EN 100 015-1.
- Always protect the device from electromagnetic perturbations, ultraviolet radiations
and, when installed outside, from the effects of climatic conditions.
- If these instructions are ignored or the device is not used according to the
specifications, no liability will be accepted and the guarantee on the device and
accessories will become invalid.
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QUICK START
2.1 QUICK INSTALLATION GUIDE
Order code
OK ?
Verify that the delivered
product is complete.
See § 7.1
Yes
No
Unscrew the 2 plugs
Select the measuring range
using SW1
Use a coin for instance
Select the filtering level using SW1
Select the temperature compensation
using SW2 *
Select the type of current output
using SW3
Open the EN 175301-803 connector
Connect the power supply cable to
the EN 175301-803 connector
Re-mount the EN 175301-803 con-
nector and connect it to the sensor
Green
LED flashes once briefly
every 2 s and current output
indicates 4 mA?
Yes
No
Press the push-
button for 2 s
Contact your
Bürkert agent
Install the appliance on the pipe
See the configuration
table opposite and
paragraph 3.2.
See the configuration
table opposite and
paragraph 3.3
See the configuration
table opposite and
paragraph 3.4
Ensure that the
cable is not
powered.
See § 4.1
Power the sensor
* or the transmission
of the temperature on
the 4-20 mA output.
See § 3.4 See the configuration
table opposite and
paragraph 4.3.2
Drive home
the connector
screw.
See § 4.3.1
The sensor
must be out of
the fluid.
See § 3.6
Unpack the
appliance
5
8223
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QUICK START
1
2
3
4
4
3
2
1
Push-
button
SW3
sinking
sourcing
SW1
OFF<->ON
Green LED Red LED
SW2
ON<->OFF
<->
See also § 5.2 for any other LED flashing.
Measuring range Position of the switches of SW1
12
0 to 1 mS/cm OFF OFF
0 to 10 mS/cm
(default value) OFF ON
0 to 100 mS/cm ON OFF
0 to 1 S/cm ON ON
Filtering level Position of the switches of SW1
34
0 (no filtering)
(default value) OFF OFF
1 (min. filtering) OFF ON
2 (medium filtering) ON OFF
3 (max. filtering) ON ON
Temperature compensation Position of the switches of SW2
1234
No compensation
(default value) OFF OFF OFF OFF
Linear compensation
0.1% ON OFF OFF OFF
0.25% OFF ON OFF OFF
0.5% ON ON OFF OFF
0.7% OFF OFF ON OFF
1% ON OFF ON OFF
1.5% OFF ON ON OFF
2% ON ON ON OFF
3% OFF OFF OFF ON
5% ON OFF OFF ON
Specific
compensation
NaOH OFF ON OFF ON
HNO3ON ON OFF ON
H2SO4OFF OFF ON ON
NaCl ON OFF ON ON
Not used OFF ON ON ON
Transmission of the
temperature to the
4-20 mA output
Position of the switches of SW2
1234
ON ON ON ON
Type of current output Position of switch SW3
Sinking (default value) Up
Sourcing Down
Green LED Red LED Status of the sensor when operating faultless
ON ON Calibration of the "zero conductivity" in progress
Flashes once briefly
OFF
Measurement of a nil conductivity (< 2% of the full scale)
Flashes at a fequency
between 0,5 and 16 Hz Measurement of a conductivity which is proportional to this frequency
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CONFIGURATION
3.1 GENERAL COMMENTS
Configuration is done by means of accessible switches after having unscrewed the plugs
counterclockwise and removed them.
- SW1 allows the selection of:
- the measuring range (switches 1 and 2)
- the filtering level of the conductivity (switches 3 and 4)
- SW2 allows the selection of the temperature compensation or the
transmission of the temperature on the 4-20 mA output.
- SW3 allows the selection of the current output mode, sinking or sourcing.
- The push-button allows the calibration of the sensor «zero conductivity» point.
3.2 MEASURING RANGE
The 4-20 mA output delivers a current which is proportional to the compensated or not
compensated conductivity or to the measured temperature. For the conductivity, the user
may choose the measuring range.
When the conductivity exceeds the full scale by 10%, the current output delivers a 22 mA
current. As soon as the conductivity is again equal or inferior to the full scale value, the current
output delivers a current between 4 and 20 mA.
3.2.1 Measuring range of the conductivity
SW1 makes it possible to select the conductivity measuring range:
- a 4 mA current indicates a conductivity which is equal to 0 mSiemens/cm
(less than 2% of the selected full scale)
Push-button
SW1 SW2
Green LED Red LED
SW3
Measuring range Position of the switches of SW1
12
0 to 1 mS/cm OFF OFF
0 to 10 mS/cm
(default value) OFF ON
0 to 100 mS/cm ON OFF
0 to 1 S/cm ON ON
7
8223
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CONFIGURATION
- a 20 mA current indicates a conductivity which is equal to either:
- 1 mSiemens/cm (mS/cm)
- 10 mS/cm
- 100 mS/cm
- 1 S/cm
The conductivity depending on the material the used fitting is made of and its dia-
meter, the full scale value must be re-calculated using the following formula:
FS = FSsx CF
where FS = Full Scale value to be programmed on the PLC
FSs= selected Full Scale
C
F= Correction factor of the fitting used: see the following tables
- If a fitting with DN15, 20 or 25 is used, use the correction factor of the DN32
- If a fitting with a DN > 100 or a vessel is used, apply a correction factor = 1.
Example:
The 8223 sensor is installed in a PVDF S020 fitting with DN32.
The selected full scale is FSs = 10 mS/cm.
The correction factor for this fitting is CF= 1,113.
Thus: FS = FSsx CF = 10 x 1,113 = 11,13 mS/cm
DN of the
fitting
Correction factor
Weld-ends / Internal and external threads True-union / Solvent and fusion spigots
Brass Stainless steel PVDF PP PVC
DN32 0.991 0.989 1.113 1.098 1.093
DN40 0.989 0.989 1.049 1.045 1.045
DN50 0.985 0.983 1.022 1.021 1.022
DN of the
fitting
Correction factor
Weld-ends Saddles
Brass Stainless steel PVDF PP PVC
DN65 - 0.993 1.020 1.019 1.025
DN80 - 0.995 1.020 1.019 1.022
DN100 - 0.998 1.019 1.017 1.010
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CONFIGURATION
Example:
If the selected measuring range is: „0 to 10 mS/cm”.
When the fluid conductivity measured by the sensor is < 2% of the full scale,
the 4-20 mA output delivers a 4 mA current; When the conductivity measured by the
sensor is equal to 10 mS/cm, the 4-20 mA output delivers a 20 mA current.
The curve hereunder shows the ratio between the measured conductivity and the
current value delivered by the 4-20 mA output.
When the conductivity exceeds the full scale by 10% (11 mS/cm in the example), the cur-
rent output delivers a 22 mA current. As soon as the conductivity is again equal or inferior
to the full scale value, the current output delivers a current between 4 and 20 mA.
3.2.2 Measuring range of the temperature
- The value of the temperature which corresponds to a 4-mA current is always -10 °C
- The value of the temperature which corresponds to a 20-mA current is always 80 °C
If the 8223 has been programmed to transmit the temperature (and not the conduc-
tivity) on the 4-20 mA output (all SW2 switches are set to ON), the corresponding
temperature/4-20 mA-output curve is the following:
The current output delivers a 22 mA current if the temperature is < -10 °C or > 80 °C.
4
20
mA
010 mS/cm
5
12
0,2
22
11
Green
LED
Red
LED
0,5 - 16 Hz
every 2 s
every
2 s
4
20
mA
080
°C
35
12
22
-10
9
8223
ENGLISH
CONFIGURATION
mS/cm
mS/cm
mS/cm
mS/cm
t (s)
t (s)
t (s)
t
(
s
)
3.3 FILTERING LEVEL
Filtering allows the attenuation of fluctuations in the conductivity. The 8223 sensor has
four filtering levels, from 0 to 3:
- Level 0 corresponds to a nil filtering: the sensor indicates any conductivity variation
- Level 3 corresponds to the maximum filtering: the sensor smoothes the
conductivity variations at the most
- Levels 1 and 2 correspond to intermediate filterings.
SW1 allows the selection of the filtering level:
Level 0 filtering
Level 1 filtering
Level 2 filtering
Level 3 filtering
Filtering level Position of the switches of SW1
34
0 (no filtering)
(default value) OFF OFF
1 (min. filtering) OFF ON
2 (medium filtering) ON OFF
3 (max. filtering) ON ON
10 8223
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CONFIGURATION
3.4 TEMPERATURE COMPENSATION
The conductivity varies with the temperature; To compensate the variations, the 8223
sensor measures the real conductivity and temperature of the fluid then re-calculates the
conductivity corresponding to a temperature of 25 °C.
SW2 makes it possible to choose the calculation mode of the temperature compensation.
Three calculation modes are possible, either:
- a specific compensation: 4 compensation curves are memorized by the
sensor for the following solutions: NaOH (sodium hydroxyde), HNO3(nitric
acid), H2SO4(sulphuric acid), and NaCl (sodium chloride).
- a linear compensation: 9 compensation factors, from 0.1 to 5% can be chosen.
- no compensation.
3.4.1 Specific compensation
The specific compensation curves for NaOH (sodium hydroxyde), HNO3(nitric acid) and
NaCl (sodium chloride) are valid for temperatures ranging from 10 to 70 °C.
The specific compensation curve for H2SO4(sulphuric acid) is valid for temperatures
ranging from 5 to 55 °C.
The compensation has been determined at the following concentrations:
NaOH : 1%
HNO3: 1%
NaCl : 0,2%
H
2SO4: 20%
- The NaCl specific curve is valid for concentrations ranging from 60 mg/l
(conductivity ≅100 µS/cm) to 270 g/l (conductivity ≅220 mS/cm).
- The NaCl compensation curve can be used for some dilute solutions.
- If the fluid of your process does not correspond to any specific solution, use one
of the linear compensations.
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