Burkert 8223 Instruction Manual

Instruction Manual

8223

INDUCTIVE CONDUCTIVITY SENSOR

8223

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

8223

ENGLISH

INTRODUCTION

1.1 SYMBOL USED

Indicates information which must be followed. Failure to follow the in for ma tion 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 rel e vant documentation to ensure you fully benefit from all the ad van tag es the prod uct 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 main tain all com po nents.

- 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.

8223

ENGLISH

QUICK START

2.1 QUICK INSTALLATION GUIDE

Order code

OK ?

Verify that the delivered product is complete. See § 7.1

Yes

Unscrew the 2 plugs

Select the measuring range

using SW1

Use a coin for instance

Select the filtering level using SW1

Select the temperature com pen sa tion

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

Press the push-

button for 2 s

Contact your Bürkert agent

Install the appliance on the pipe

See the con fi gu ra tion table opposite and para graph 3.2.

See the con fi gu ra tion table opposite and paragraph 3.3

See the con fi gu ra tion table opposite and paragraph 3.4

Ensure that the cable is not pow ered.

See § 4.1

Power the sensor

* or the trans mis sion of the temperature on the 4-20 mA output.

See § 3.4

See the con fi gu ra tion 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

ap pli ance

8223

ENGLISH

QUICK START

Push-

button

SW3

sink ing

sourc ing

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

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

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

HNO

ON ON OFF ON

2SO4

OFF 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)

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

8223

ENGLISH

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 con duc tiv i ty, the user may choose the mea sur ing 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 mea sur ing 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

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

8223

ENGLISH

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 diameter, the full scale value must be re-calculated using the following for mu la:

FS = FS

x C

where FS = Full Scale value to be programmed on the PLC FSs = selected Full Scale CF = 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 FS

= 10 mS/cm.

The correction factor for this fitting is C

= 1,113.

Thus: FS = FS

x 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

8223

ENGLISH

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 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.

3.2.2 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 con duc tiv i ty) on the 4-20 mA output (all SW2 switches are set to ON), the cor re spond ing 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.

mS/cm

0,2

Green

LED Red

LED

0,5 - 16 Hz

every 2 s

every

2 s

080

°C

-10

8223

ENGLISH

CONFIGURATION

mS/cm

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 fil ter ing

Level 1 fil ter ing

Level 2 fil ter ing

Level 3 fil ter ing

Filtering level

Position of the switches of SW1

0 (no filtering) (default value)

OFF OFF

1 (min. filtering) OFF ON

2 (medium filtering) ON OFF

3 (max. filtering) ON ON

8223

ENGLISH

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 com pen sa tion.

Three calculation modes are possible, either:

- a specific compensation: 4 compensation curves are memorized by the sensor for the following solutions: NaOH (sodium hydroxyde), HNO

(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), HNO

(nitric acid) and

NaCl (sodium chloride) are valid for temperatures ranging from 10 to 70 °C.

The specific compensation curve for H

2SO4

(sulphuric acid) is valid for tem per a tures

ranging from 5 to 55 °C.

The compensation has been determined at the following concentrations:

NaOH : 1% HNO

: 1%

NaCl : 0,2%

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.

8223

ENGLISH

CONFIGURATION

3.4.2 Linear compensation

If no specific compensation curve corresponds to your process, use one of the 9 linear compensation factors by using SW2.

If you do not know the compensation factor (average

α) of your process, you can deter-

mine it by doing the following:

1) Measure the conductivity of the fluid at 25 °C ( )

2) Measure the conductivity of the fluid at a temperature T ( )

3) Apply the following formula to determine the

α factor:

4) Use the compensation factor nearest to the calculated one:

α =

25°

25° T

25 C

T C

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

HNO

ON ON OFF ON

2SO4

OFF OFF ON ON

NaCl ON OFF ON ON

Not used OFF ON ON ON

8223

ENGLISH

CONFIGURATION

3.5 TRANSMISSION OF THE TEMPERATURE

If, instead of the conductivity, the 8223 sensor is meant to transmit the tem per a ture (be tween -10 °C and 80 °C) to the 4-20 mA output, configure SW2 as follows:

Thus the conductivity measuring range chosen with SW1 is not taken into account.

3.6 CALIBRATING THE “ZERO CONDUCTIVITY” POINT

The “zero conductivity” point of the sensor can drift in time. To check whether the sensor is correctly calibrated or not, measure the conductivity of the air (conductivity = 0).

- Dismantle the sensor from the pipe.

Ensure the finger orifice the fluid passes through is clean and dry.

- If the conductivity of the air > 0 (the current output indicates a value > 4 mA and the green LED flashes at a frequency between 0.5 and 16 Hz), press the push button for at least 2 s: both LEDs light up and the sensor starts calibrating its zero conductivity” point.

The operation can last a few minutes.

The calibration is finished when the two LEDs are not steadily lit any more. Then:

- If the red LED switches off and the green LED flashes rapidly every 2 s, the sensor is correctly calibrated.

- If the green LED lights up and the red LED flashes 3 or 4 times every 2 s, the calibration has failed: press the push-button briefly to go back to normal operating using the parameters of the previous calibration.

- If the calibration fails several times in a row, contact your Bürkert agent.

Push-button

Green LED Red LED

Transmission of the

temperature to the

4-20 mA output

Position of the switches of SW2

1234

ON ON ON ON

8223

ENGLISH

INSTALLATION

4.1 MOUNTING INSTRUCTIONS

4.1.1 Temperature-pressure diagram

The sensor and the fitting in which it is installed have limited operating temperatures and pressures. The diagram hereunder shows the operating range of the 8223-fitting assembly, for each fitting material:

A: Operating range of the assembly 8223+fitting

4.1.2 Installation recommendations

Choose a mounting position which avoids the building of air bubbles or cavities within the finger orifice.

Position 1: horizontal or vertical mounting onto a pipe. Position 2: mounting on a vessel without stirring Position 3: mounting on a vessel with stirring

- When dismounting the sensor from the pipe, take all the precautions related to this process.

- Ensure the fluid passage orifice is in the direction of the flow.

-10

+20 +40 +60

+80

+100

2 1

P [bar]

T [°C]

PVC

PVDF

Metal

8223

ENGLISH

INSTALLATION

4.2 MOUNTING

The 8223 conductivity sensor is installed on a pipe as follows:

- Insert the nut [4] on the fitting [6] and clip the ring [3] in the groove [5].

- Insert the sensor [1] into the fitting [6] by ensuring the gasket [2] is in its right place.

- Screw on the nut and tighten by hand only.

- Ensure the gasket material (FKM in standard) is chemically compatible

with your process.

- One EPDM gasket and one FKM gasket are additionally supplied with

the sensor.

- Make sure the gasket is not damaged when replacing it.

8223

ENGLISH

INSTALLATION

4.3 ELECTRICAL CONNECTION INSTRUCTIONS

Always ensure that the appliance is not powered before working on it. All the connections must be disconnected.

- Use a shielded cable with a limit operating temperature > +80°C.

- Under normal con di tions of use, a shielded cable of 0.75 mm

section is sufficient

for signal transmission.

- Do not install the line close to high voltage or high frequency cables.

- If adjacent laying is unavoidable, keep a minimum distance of 30 cm.

- Connect the shielding to earth.

- Use a quality power supply (filtered and regulated).

- Do not open or cable the sensor when powered.

- It is essential that a 100 mA fuse be used for the power supply.

4.3.1 Mounting and connection of the EN 175301-803 connector

- Remove part [3] from part [2].

- Unscrew the cable gland [5].

- Insert cable into part [2] via cable gland.

- Wire part [3] (see below)

- Replace part [3].

- Tighten the cable gland [5].

- Place gasket [4] between the connector and the fixed connector of the 8223.

- Connect the connector to the 8223.

- Tighten screw [1] to ensure tightness and correct electrical contact

Always check the connection of the connectors to ensure correct operation of the appliance.

L+

(12-30 VDC)

4-20 mA output

L-

Not connected

8223

ENGLISH

INSTALLATION

4-20 mA

12-30 VDC

100 mA

SW3

4-20 mA

12-30 VDC

100 mA

SW3

4.3.2 Connecting the 8223 to an external device (PLC,...)

The 8223 sensor can be connected to a PLC or any other device which is able to use the 4-20 mA signal transmitted by the sensor.

The connection can be carried out either in sourcing or in sinking mode, as shown by the figures below:

SW3 must be configured correctly when the sensor is not powered, de pend ing on the connection mode chosen.

4.3.3 Precautions during in stal la tion and com mis sion ing

- When the appliance is powered and the cover is open, the protection against electrical shocks is no longer effective.

- Always verify the chemical compatibility of the materials which are in contact with the fluid to be measured.

- When cleaning the appliance use products which are chemically compatible with the materials in the appliance.

- Do not insert any object (screwdriver for instance) within the finger orifice. When the orifice is dirty, use compressed air to clean it.

PLC

Connection in sourcing mode Connection in sinking mode

Type of current output Position of switch SW3

Sinking (default value)

Sourcing Down

not connected

8223

ENGLISH

INSTALLATION

4.4 EXAMPLES OF CONNECTIONS WITH A 8223 SENSOR

Between the 8223 sensor and the 1067 positioner.

Between the 8223 sensor and a solenoid valve with 8624-2 PI controller.

Between the 8223 sensor and the 8630 Top Control mounted on a 2031 diaphragm valve

8223

24 V=

L+

L-

SW3

1067

4-20 mA

8223

24 V=

L+

L-

SW3

Setpoint +

Setpoint -

24 V=

+-+

+24 V

SW3

2031+ 8630

8223

4-20 mA

L-

L+

not connected

8223

ENGLISH

MAINTENANCE

5.1 MAINTENANCE

The 8223 sensor may be cleaned with water or a product which is compatible with the materials therein.

Your Bürkert supplier is available to provide you with any additional information you require.

5.2 IF A PROBLEM OCCURS...

An error is indicated by lighting up of the green LED, special flashing of the red LED and the transmission of a 22-mA current to the current output.

The following table lists possible faults that can occur and their solutions:

Problem

Green

LED

status

Red LED

status

Current

output status

Possible cause Do the following

Burkert 8223 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual