Burkert 8202 ELEMENT Operating Instructions Manual

Type 8202

ELEMENT

pH- or redox-meter
pH- oder Redox-Messgerät
pH- ou redox-mètre

Operating Instructions

Bedienungsanleitung
Manuel d‘utilisation

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.

© 2008-2012 Bürkert SAS

Operating Instructions 1203/3_EU-ML_560329 _Original_FR

Type 8202 ELEMENT

Contents

1. ABOUT THIS MANUAL .....................................................................................................................................................................5

1.1. Symbols used ..........................................................................................................................................................................5

1.2. Validity of the manual ..........................................................................................................................................................5

2. INTENDED USE ....................................................................................................................................................................................6

2.1. Restraints ...................................................................................................................................................................................6

3. BASIC SAFETY INFORMATION ....................................................................................................................................................7

4. GENERAL INFORMATION ................................................................................................................................................................9

4.1. Contact ........................................................................................................................................................................................9

4.2. Warranty conditions ..............................................................................................................................................................9

4.3. Informations on the internet ............................................................................................................................................9

5. DESCRIPTION ....................................................................................................................................................................................10

5.1. Area of application .............................................................................................................................................................10

5.2. General description ...........................................................................................................................................................10

5.2.1. Design ........................................................................................................................................................10

5.2.2. pH or Redox probe ................................................................................................................................. 10

5.3. Description of the name plate .....................................................................................................................................11

5.4. Available versions ...............................................................................................................................................................11

6. TECHNICAL DATA .............................................................................................................................................................................12

6.1. Conditions of use ................................................................................................................................................................12

6.2. Conformity to standards and directives .................................................................................................................12

6.3. General technical data .....................................................................................................................................................13

6.3.1. Mechanical data .......................................................................................................................................13

6.3.2. General technical data ...........................................................................................................................15

6.3.3. Electrical data ...........................................................................................................................................16

6.3.4. Data of connectors and cables ............................................................................................................16

6.3.5. pH/Redox probe ...................................................................................................................................... 17

7. ASSEMBLY ...........................................................................................................................................................................................18

7.1. Safety instructions .............................................................................................................................................................18

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Type 8202 ELEMENT

7.2. Unscrewing the cover .......................................................................................................................................................18

7.3. Mounting the cover ............................................................................................................................................................19

7.4. Mounting the display module .......................................................................................................................................19

7.5. Removing the display module .....................................................................................................................................20

7.6. Mounting the probe into the holder (without fluid) ..........................................................................................20

7.7. Mounting the electronic module to the sensor holder (without fluid) ...................................................21

8. INSTALLATION AND COMMISSIONING ...............................................................................................................................22

8.1. Safety instructions .............................................................................................................................................................22

8.2. Installation onto the pipe ................................................................................................................................................23

8.3. Electrical wiring ....................................................................................................................................................................25

8.3.1. Assembling the male or female connector (accessories: see chap. 11) ...................................25

8.3.2. Equipotentiality of the installation ........................................................................................................26

8.3.3. Wiring a version with a single M12 fixed connector ....................................................................... 27

8.3.4. Wiring a version with 2 M12 fixed connectors .................................................................................29

9. OPERATING AND FUNCTIONS .................................................................................................................................................32

9.1. Safety instructions .............................................................................................................................................................32

9.2. Functions .................................................................................................................................................................................32

9.3. Using the navigation key ................................................................................................................................................33

9.4. Using the dynamic functions ........................................................................................................................................34

9.5. Example for the input of a numerical value .........................................................................................................35

9.6. Example for browsing in a menu ...............................................................................................................................35

9.7. Description of the display ..............................................................................................................................................36

9.7.1. Description of icons and LEDs ............................................................................................................36

9.7.2. When switching on the device ............................................................................................................. 37

9.8. Read level ................................................................................................................................................................................37

9.9. Accessing the Settings level ........................................................................................................................................38

9.10. Menu structure of the Settings level ........................................................................................................................39

9.11. Parameters Menu ................................................................................................................................................................42

9.11.1. Transferring data from one device to another ...................................................................................42

9.11.2. Setting the date and time ......................................................................................................................43

9.11.3. Modifying the PARAM menu access code ........................................................................................43

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9.11.4. Restoring the default parameters of the Read level and the outputs ..........................................43

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Type 8202 ELEMENT

9.11.5. Setting the data displayed in the READ level ...................................................................................44

9.11.6. Displaying the lowest and highest values measured ......................................................................45

9.11.7. Setting the display contrast and brightness .....................................................................................45

9.11.8. Choosing the output wiring mode ....................................................................................................... 45

9.11.9. Setting the parameters of the current outputs .................................................................................46

9.11.10. Setting the parameters of the transistor outputs .........................................................................47

9.11.11. Setting the sensor parameters .........................................................................................................48

9.12. Calibration menu ...............................................................................................................................................................49

9.12.1. Activating/deactivating the Hold function ..........................................................................................49

9.12.2. Modifying the Calibration menu access code ..................................................................................50

9.12.3. Adjusting the current outputs ...............................................................................................................50

9.12.4. Calibrating the sensor ............................................................................................................................51

9.12.5. Entering an offset for the temperature measurement .....................................................................55

9.13. Diagnostic menu .................................................................................................................................................................55

9.13.1. Modifying the Diagnostic menu access code ...................................................................................55

9.13.2. Monitoring the condition of the probe ................................................................................................55

9.13.3. Monitoring the fluid temperature ..........................................................................................................56

9.14. Test menu ..............................................................................................................................................................................57

9.14.1. Modifying the Test menu access code ...............................................................................................57

9.14.2. Checking the outputs functions ........................................................................................................... 57

9.14.3. Checking the outputs behaviour ..........................................................................................................58

9.15. Information menu ...............................................................................................................................................................58

9.15.1. Reading the cause of events linked to icons ....................................................................................58

9.15.2. Reading the software versions .............................................................................................................59

10. MAINTENANCE AND TROUBLESHOOTING .......................................................................................................................60

10.1. Safety instructions .............................................................................................................................................................60

10.2. Cleaning of the transmitter ............................................................................................................................................60

10.2.1. Cleaning of the pH/ORP probe ...........................................................................................................60

10.3. Replacing the probe ..........................................................................................................................................................61

10.4. Replace the seal of the sensor holder ....................................................................................................................62

10.5. Troubleshooting ...................................................................................................................................................................63

11. SPARE PARTS AND ACCESSORIES ......................................................................................................................................69

12. PACKAGING, TRANSPORT ..........................................................................................................................................................69

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Type 8202 ELEMENT

13. STORAGE ..............................................................................................................................................................................................70

14. DISPOSAL OF THE PRODUCT ..................................................................................................................................................70

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Type 8202 ELEMENT

About this manual

1. ABOUT THIS MANUAL

This manual describes the entire life cycle of the device. Please keep this manual in a safe place, accessible to all
users and any new owners.

This manual contains important safety information.

Failure to comply with these instructions can lead to hazardous situations.

• This manual must be read and understood.

1.1. Symbols used

DANGER

Warns you against an imminent danger.

• Failure to observe this warning can result in death or in serious injury.

WARNING

Warns you against a potentially dangerous situation.

• Failure to observe this warning can result in serious injury or even death.

CAUTION

Warns you against a possible risk.

• Failure to observe this warning can result in substantial or minor injuries.

NOTE

Warns you against material damage.

• Failure to observe this warning may result in damage to the device or system.

Indicates additional information, advice or important recommendations.

Refers to information contained in this manual or in other documents.

→ Indicates a procedure to be carried out.

1.2. Validity of the manual

The manual describes the devices from V2 software version of the acquisition / conversion module for the
measured process values.

Check this sofware version on the device in the menu Info -> Software -> Versions -> Main.

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Type 8202 ELEMENT

Intended use

2. INTENDED USE

Use of this device that does not comply with the instructions could present risks to people, nearby
installations and the environment.

• The 8202 transmitter is intended solely for the measurement of:

- the pH in clean liquids or liquids containing solids, sulphides or proteins.

- or the oxidation reduction potential in clean liquids or liquids containing solids, sulphides or proteins which
may present low conductivity.

• This device must be protected against electromagnetic interference, ultraviolet rays and, when installed out­doors, the effects of climatic conditions.

• This device must be used in compliance with the characteristics and commissioning and use conditions
specified in the contractual documents and in the user manual.

• Requirements for the safe and proper operation of the device are proper transport, storage and installation, as
well as careful operation and maintenance.

• Only use the device as intended.

2.1. Restraints

Observe any existing restraints when the device is exported.

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Type 8202 ELEMENT

Basic safety information

3. BASIC SAFETY INFORMATION

This safety information does not take into account:

• any contingencies or occurrences that may arise during assembly, use and maintenance of the device.

• the local safety regulations that the operator must ensure the staff in charge of installation and maintenance
observe.

Danger due to high pressure in the installation.

• Stop the circulation of fluid, cut off the pressure and drain the pipe before loosening the process connections.

Danger due to electrical voltage.

• Shut down and isolate the electrical power source before carrying out work on the system.

• Observe all applicable accident protection and safety regulations for electrical equipment.

Danger due to high fluid temperatures.

• Use safety gloves to handle the device.

• Stop the circulation of fluid and drain the pipes before loosening the process connections.

Danger due to the nature of the fluid.

• Respect the regulations on accident prevention and safety relating to the use of aggressive fluids.

Various dangerous situations.

To avoid injury take care:

• to prevent any unintentional power supply switch-on.

• to carry out the installation and maintenance work by qualified and skilled staff with the appropriate tools.

• to guarantee a set or controlled restarting of the process after a power supply interruption.

• to use the device only if in perfect working order and in compliance with the instructions provided in the user
manual.

• to observe the general technical rules during the planning and use of the device.

• not to use this device in explosive atmospheres.

• not to use this device in an environment incompatible with the materials from which it is made.

• not to make any external modifications to the device. Do not paint or varnish any part of the device.

• not to use fluid that is incompatible with the materials of which the transmitter is made.

• not to subject the device to mechanical loads (e.g. by placing objects on top of it or by using it as a step).

NOTE

The device may be damaged by the fluid in contact with.

• Systematically check the chemical compatibility of the component materials of the transmitter and the fluids
likely to come into contact with it (for example: alcohols, strong or concentrated acids, aldehydes, alkaline
compounds, esters, aliphatic compounds, ketones, halogenated aromatics or hydrocarbons, oxidants and
chlorinated agents).

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Type 8202 ELEMENT

Basic safety information

NOTE

Elements / Components sensitive to electrostatic discharges

• This device contains electronic components sensitive to electrostatic discharges. They may be damaged if

they are touched by an electrostatically charged person or object. In the worst case scenario, these compo­nents are instantly destroyed or go out of order as soon as they are activated.

• To minimise or even avoid all damage due to an electrostatic discharge, take all the precautions described in

the EN 61340-5-1 and 5-2 norms.

• Also ensure that you do not touch any of the live electrical components.

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Type 8202 ELEMENT

General information

4. GENERAL INFORMATION

4.1. Contact

To contact the manufacturer of the device use following address:

Bürkert SAS

Rue du Giessen

BP 21

F-67220 TRIEMBACH-AU-VAL

The addresses of our international branches can be found on the Internet at: www.burkert.com

4.2. Warranty conditions

The condition governing the legal warranty is the conforming use of the 8202 in observance of the operating condi­tions specified in this manual.

4.3. Informations on the internet

You can find the user manuals and technical data sheets regarding the type 8202 at: www.burkert.com

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Type 8202 ELEMENT

Description

5. DESCRIPTION

5.1. Area of application

The 8202 transmitter is intended solely for the measurement of:

• the pH in clean liquids or liquids containing solids, sulphides or proteins.

• or the oxidation reduction potential in clean liquids or liquids containing solids, sulphides or proteins which may
present low conductivity.

Thanks to two fully adjustable transistor outputs, the transmitter can be used to switch a solenoid valve, activate
an alarm and, thanks to one or two 4-20-mA current outputs, establish one or two control loops.

5.2. General description

5.2.1. Design

The 8202 transmitter comprises:

• a module for measuring process values, comprising:

- a pH or Redox sensor measuring a potential difference (PD) in mV

- a Pt1000 temperature sensor built in the holder of the pH or Redox sensor, measuring a resistance.

• an acquisition / conversion module for the process values measured:

- measured PD acquisition in mV

- conversion of the measured PD into pH units (for a transmitter with pH sensor only)

- acquisition of the resistance measured and conversion into temperature

• a display module with browse button used to read and/or configure the parameters of the device. The display
module is available as an accessory.

One version of the 8202 transmitter with two transistor outputs and a 4-20 mA output operates on a 2-wire
system and requires a power supply of 14-36 V DC. For such a version, electrical connection is done via an M12,
5-point, male fixed connector.

One version of the 8202 transmitter with two transistor outputs and two 4-20 mA outputs operates on a 3-wire
system and requires a power supply of 12-36 V DC. For such a version, electrical connection is done via an M12,
5-point, male fixed connector and an M12, 5-point, female fixed connector.

5.2.2. pH or Redox probe

10

The transmitter 8202 can be fitted with a standard probe 120 mm long, measuring the pH or the oxidation
reduction potential.

It is screwed into a holder with the built-in Pt1000 temperature probe.

• The pH probe is a glass membrane with variable sensitivity according to the pH. When the pH probe is
immersed in a solution, a difference in potential is formed, due to the hydrogen ions (H+), between the glass
membrane and the solution. This difference in potential, measured in relation to a reference electrode, is directly
proportional to the pH value (59.16 mV per pH unit at 25°C).

• When a Redox probe is immersed in a solution, an exchange of electrons occurs based on the oxidizing and
reducing effects of an electrolyte. The resulting voltage is the oxidation reduction potential.

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Type 8202 ELEMENT

Description

5.3. Description of the name plate

8202 pH/ORP Transmitter
Supply: 14-36VDC 40W Max
Output: 1x4-20mA 2xTrans 1A Max
Cell:pH -2/16 ORP +-2000mV 120mm PG13.5
Process: Temp 0/50°C limited by cell
PN 16 Bar limited by cell

Made in France

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10

9

Fig. 1 Name plate on the 8202 transmitter

IP65 -IP67 W43LP

S-N:1110

00559630

8

2:NPN/PNP1

3:0V

4:NPN/PNP2

1:V+

5.4. Available versions

1. Type of transmitter and parameter measured

1
2

2. Electrical power supply and power consumption

3
4
5

3. Output specifications

6

4. Sensor specifications

7

5. Temperature range of the fluid, without sensor

6. Nominal pressure of the fluid, without sensor

7. Allocation of the pins on the M12 fixed
connectors

8. Construction code

9. Order code

10. Serial number

11. Protection rating

The following versions of the 8202 pH transmitter are available. These references include the electronic module
and the sensor holder including the Pt1000.

The pH/Redox sensor, the display module and the fitting for connection to the process should be ordered sepa­rately. For the pH/Redox sensor and the display module, see the list of accessories in Chapter 11

Voltage supply Outputs

14-36 V DC 2 transistors +

1 x 4-20 mA

12-36 V DC 2 transistors +

2 x 4-20 mA

Electrical
connection

Male 5-pin M12
fixed connector

Male 5-pin M12
fixed connector
+ female 5-pin
M12 fixed
connector

Sensor

without PVC no

without PVC no

Nut
material

UL Order code

yes

PVDF no

yes

yes

PVDF no

yes

559630

559634

559632

559636

559631

559635

559633

559637

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6. TECHNICAL DATA

6.1. Conditions of use

Type 8202 ELEMENT

Technical data

Ambient temperature

Air humidity

Protection rating

-10 to +60 °C (without pH or Redox probe)
< 85 %, non condensated
IP65 and IP67 with connectors plugged in and tightened and electronic

module cover fully screwed down

6.2. Conformity to standards and directives

The device conforms to the CE directives through the following standards:

• EMC: EN 61000-6-2, EN 61000-6-3

• Vibration: EN 60068-2-6

• Shock: EN 60068-2-27

• Pressure: complying with article 3 of §3 from 97/23/CE directive. Acc. to the 97/23/CE pressure directive, the
device can only be used in the following cases (depending on max. pressure, pipe diameter and fluid):

Type of fluid Conditions

Fluid group 1, §1.3.a only DN25
Fluid group 2, § 1.3.a DN

Fluid group 1, § 1.3.b DN

Fluid group 2, § 1.3.b DN

≤ 32

or DN > 32 and PNxDN ≤ 1000

≤ 25

or DN > 25 and PNxDN ≤ 2000

≤ 125

12

The UL devices conform to the following standards:

• UL 61010-1

• CAN/CSA-C22.2 n° 61010-1

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Type 8202 ELEMENT

Technical data

6.3. General technical data

6.3.1. Mechanical data

• A: application range of a 8202 with a PVDF nut

• B: application range of a 8202 with a PVC nut

The measures have been made at an ambient
temperature of 60 °C

P = Fluid pressure

T = Fluid temperature

P (bar)

16
15
14
13
12
11
10

B

PVDF

PVC

9
8
7
6
5
4
3
2
1
0

-20 0 +20 +40 +60 +80 +100 +120

A

PVDF

T ( ° C)

P (psi)
232

217.6
203

188.6
174

159.6
145

130.6
116

101.6
87

72.5
58

43.5
29
14
0

+140

Fig. 2 Fluid temperature / pressure dependency of the 8202 (without the probe) with a PVC or PVDF nut

16

P (bar)

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1
0

PVC + PP

-20

Metal

0 +20 +40 +60

232

217.6
203

188.6
174

159.6
145

130.6
116

101.6
87

72.5
58

43.5
29
14
0

T (°C)

P (psi)

P = Fluid pressure

T = Fluid temperature

Fig. 3 Fluid temperature / pressure dependency of the 8202 (without the probe) with a PVC nut and a metal, PVC or PP

S022 adapter

P (bar)

16
15
14
13
12
11
10

9
8

PVC + PP
7
6
5
4
3
2
1
0

-20 0 +20 +40 +60 +80 +100 +140

PVC

PP

Metal

+120

232

217.6
203

188.6
174

159.6
145

130.6
116

101.6
87

72.5
58

43.5
29
14
0

P (psi)

P = Fluid pressure

T = Fluid temperature

T (°C)

Fig. 4 Fluid temperature / pressure dependency of the 8202 (without the probe) with a PVDF nut and a metal, PVC or

PP S022 adapter

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Type 8202 ELEMENT

Technical data

Nickel-plated

brass

Stainless steel

EPDM

PVDF

PC

EPDM

PPS

EPDM

PPS

pH/Redox probe

PVDF

PVC or PVDF

Stainless steel
316Ti

Part Material

Box / seals stainless steel, PPS / EPDM

Cover / seal PC / EPDM

Display module PC / PBT

M12 fixed connector nickel-plated brass

Fixed connector holder stainless steel 1.4404 (316L)

Screws stainless steel

Nut PVC or PVDF

Sensor holder / seal (in
contact with the fluid)

PVDF, stainless steel 1.4571
(316Ti) / EPDM

pH or Redox probe refer to the related manual

Fig. 5 Materials used in the transmitter 8202 (without the probe)

260

59

111

75

210

175

5078

23.8

20

14

Fig. 6 Dimensions of transmitter 8202 [mm]

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Type 8202 ELEMENT

Technical data

6.3.2. General technical data

Pipe diameter DN25 to DN110 (DN15 to DN20 under specific

conditions)

Type of fitting Adapter S022

Nut between the 8202 and the fitting G 1 1/2'' internal thread

Max. fluid temperature

The fluid temperature may be restricted by the probe
used (see the related instruction manual), by the
pressure of the fluid and the material of the adapter
S022

• with a PVDF nut (see also Fig. 2and Fig. 4)

• with a PVC nut (see also Fig. 2 and Fig. 3)

• -20 to +130 °C

• 0 to +50 °C

Max. fluid pressure PN16

The fluid pressure may be restricted by the probe used
(see the related instruction manual), by the temperature
of the fluid and the material of the adapter S022 (see
Fig. 2, Fig. 3 and Fig. 4)

pH measurement

• Measurement range

• Resolution

• Accuracy

• Recommended min. divergence of the pH range
associated to the 4-20 mA signal

• -2 to 16 pH or -580 to +580 mV

• 0.001 pH or 0.1 mV

• ±0.02 pH or 0.5 mV

• 0.5 pH unit or 30 mV (eg: range 6,7 to 7,2 pH or

-20 mV to +10 mV associated to the 4-20 mA
output current)

Redox potential measurement

• Measurement range

• Resolution

• Accuracy

• -2000 mV to +2000 mV

• 1 mV

• ±3 mV

• Recommended min. divergence of the redox potential
range associated to the 4-20 mA signal

• 50 mV (eg: range 1550 to 1600 mV associated to
the 4-20 mA output current)

Temperature measurement

• Measurement range

• Resolution

• Accuracy

• Recommended min. divergence of the temperature
range associated to the 4-20 mA signal

• -40 °C to +130 °C

• 0.1 °C

• ±1 °C

• 10 °C (eg: range 10 to 20 °C associated to the
4-20 mA output current)

Temperature probe Pt1000 integrated in the sensor holder

Temperature compensation • Automatic (integrated Pt1000)

• Reference temperature = 25°C

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6.3.3. Electrical data

Power supply

Type 8202 ELEMENT

Technical data

• Version with 3 outputs

• Version with 4 outputs
Characteristics of the power source (not supplied) of

the UL versions

• 14-36 V DC, filtered and regulated

• 12-36 V DC, filtered and regulated

• limited energy source (in accordance to UL 61010-1,
paragraph 9.3)

• or Class 2 source (in accordance to standards
1310/1585 and 60950-1)

Current consumption

• Version with 3 outputs

• Version with 4 outputs

• 25 mA max. (at 14 V DC)

• 5 mA max. (at 12 V DC)

Current consumption, with loads on the transistors 1 A max.
Power consumption 40 W max.
Protection against polarity reversal
Protection against voltage spikes
Protection against short circuits

yes
yes
yes, transistor outputs

Transistor output NPN (/sink) or PNP (/source) (depending on software

setting), open collector, 700 mA max., 0.5 A max. per
transistor if both transistor outputs are wired.
NPN output: 0.2-36 V DC
PNP output: supply voltage

Current output

4-20 mA, sink ("NPN sink") or source ("PNP source")
(depending on software setting)

16

• Response time (10 % - 90 %)

• Version with 1 current output

• 150 ms (default value)

• max. loop impedance: 1100

W at 36 V DC, 610 W at

24 V DC, 180 W at 14 V DC

• Version with 2 current outputs

• max. loop impedance: 1100

W at 36 V DC, 610 W at

24 V DC, 100 W at 12 V DC

6.3.4. Data of connectors and cables

Number of fixed connectors Type of connectors

1 male M12 fixed connector 5-pin female M12 connector (not supplied).

For the M12 connector with order code 917116, use a shielded
cable:

• diameter: 3 to 6.5 mm

• wire cross section: max. 0.75 mm

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Type 8202 ELEMENT

Technical data

Number of fixed connectors Type of connectors

1 male M12 fixed connector and 1 female
M12 fixed connector

5-pin female M12 connector (not supplied) and 5-pin male M12
connector (not supplied).

For the M12 connector with order code 917116, use a shielded
cable:

• diameter: 3 to 6.5 mm

• wire cross section: max. 0.75 mm

6.3.5. pH/Redox probe

The pH or redox probe must satisfies the following specifications:

• combined probe;

• length: 120 mm;

• with PG 13.5 head;

• with an S7/S8 fixed connector;

• without temperature probe.

The specifications of the probe can be found in the manual of the probe used.

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Type 8202 ELEMENT

Assembly

7. ASSEMBLY

7.1. Safety instructions

WARNING

Risk of injury due to non-conforming assembly.

• The device must only be assembled by qualified and skilled staff with the appropriate tools.

Risk of injury due to unintentional switch on of power supply or uncontrolled restarting of the
installation.

• Avoid unintentional activation of the installation.

• Guarantee a set or controlled restarting of the process subsequent to any intervention on the device.

7.2. Unscrewing the cover

NOTE

The tightness of the transmitter is not guaranteed when the cover is removed.

• Prevent the projection of liquid inside the housing.

The transmitter may be damaged if a metal component comes into contact with the electronics.

• Prevent contact of the electronics with a metal component (screwdriver, for example).

→ To unscrew the cover, use your hand or a tool which can be used as a

lever, taking care not to scratch the glass.

→ Turn the cover until fully unscrewed.

Fig. 7 Unscrewing the cover

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Type 8202 ELEMENT

Assembly

7.3. Mounting the cover

→ Check that there is a seal on the cover and that it is not damaged. Replace

it if necessary.

→ Grease the seal if necessary, using a component compatible with the

seal material.

→ Fully tighten by hand to guarantee tightness.

Fig. 8 Fitting the cover

7.4. Mounting the display module

→ Unscrew the cover (see chapter 7.2).

→ Set the display module at an angle of ca. 20° in relation to the desired

position.

→ The module can be mounted in 4 different positions, at 90° intervals.

→ Fully push in the module and turn to the right to lock it.

a)

b)

20°

c)

d)

Fig. 9 Mounting the display module

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7.5. Removing the display module

→ Unscrew the cover if necessary (see chapter 7.2).

→ Turn the module by ca. 20° to the left. Once unlocked, the module is raised

slightly by the spring action.

20°

→ Remove the module from its housing.

Type 8202 ELEMENT

Assembly

Fig. 10 Removing the display module

7.6. Mounting the probe into the holder (without fluid)

probe head

H

compression washer

seal

A

Following instructions are valid for a Bürkert probe.

If you use a probe from another supplier, respect the related
instructions.

→ Remove the protective plugs

→ Check that dimension H on the probe is between 34 and 46mm. If necessary,

adjust the height of the compression washer.

→ At first use, apply water or soapy water on the "A" seal.

→ Insert the seal into the groove on the holder.

→ Insert the probe with its seal into the holder from above.

→ Tighten the probe head using a suitable wrench.

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Fig. 11 Mounting the probe into the holder (without fluid)

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Type 8202 ELEMENT

Assembly

7.7. Mounting the electronic module to the sensor holder (without fluid)

→ Check that the probe is mounted into the sensor holder (see chapter 7.6).

→ Check that seal "A" on the holder is in good condition. Replace it if

necessary (see Chap. 11)

→ Clean connectors "B" and "C" for connection of the pH/redox probe with

alcohol to avoid measurement errors.

→ Insert the electronic module into the holder, making sure the polarising

slots are correctly positioned.

→ Apply slight vertical pressure to engage the seal.

C

B

A

→ Fasten the electronic module and the holder together by tightening the

nut. Tighten the G 2'' nut by hand only, until it stops turning, to ensure
good electrical contact.

Fig. 12 Mounting the electronic module to the holder (without fluid)

→ Mount the display module (see chap. 7.4) to calibrate the transmitter.

→ Calibrate the transmitter (see chap. 9.12.4).

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