Burkert 8202 ELEMENT User manual

Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
Type 8202
ELEMENT
pH- or redox-meter
pH- oder Redox-Messgerät
pH- ou redox-mètre

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürkert SAS, 2008 - 2021
Operating Instructions 2106/06_EU-ML 00560329 / Original_FR

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1 ABOUT THE OPERATING INSTRUCTIONS ...........................................................................................................................7
1.1 Definition of the word "device" .......................................................................................................................................7
1.2 Validity of the Operating Instructions .........................................................................................................................7
1.3 Symbols used ..........................................................................................................................................................................7
2 INTENDED USE ...................................................................................................................................................................................8
3 BASIC SAFETY INFORMATION ..................................................................................................................................................8
4 GENERAL INFORMATION ...........................................................................................................................................................10
4.1 Contact ....................................................................................................................................................................................10
4.2 Warranty conditions ...........................................................................................................................................................10
4.3 Information on the Internet ............................................................................................................................................10
5 DESCRIPTION ...................................................................................................................................................................................11
5.1 Area of application ............................................................................................................................................................11
5.2 Construction of the 8202 ...............................................................................................................................................11
5.3 pH or Redox ("ORP") probe ..........................................................................................................................................11
5.4 Type label ...............................................................................................................................................................................12
6 TECHNICAL DATA ...........................................................................................................................................................................13
6.1 Conditions of use ..............................................................................................................................................................13
6.2 Conformity to standards and directives ................................................................................................................13
6.2.1 Conformity to the Pressure Equipment Directive ......................................................................13
6.2.2 UL certification ....................................................................................................................................14
6.3 Dimensions of the device .............................................................................................................................................14
6.4 Mechanical data .................................................................................................................................................................15
6.5 Fluid data ...............................................................................................................................................................................16
6.6 Electrical data ......................................................................................................................................................................18
6.7 Data of connectors and cables ..................................................................................................................................19
6.8 pH/Redox ("ORP") probe ...............................................................................................................................................19
7 ASSEMBLY ..........................................................................................................................................................................................20
7.1 Safety instructions ............................................................................................................................................................20
7.2 Removing the housing lid .............................................................................................................................................20
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7.3 Mounting the housing lid ..............................................................................................................................................21
7.4 Mounting the display module .....................................................................................................................................21
7.5 Dismounting the display module ..............................................................................................................................22
7.6 Install the pH or redox probe into the holder (without fluid) .....................................................................22
7.7 Mounting the electronic module to the sensor holder (without fluid) ..................................................23
8 INSTALLATION AND WIRING ....................................................................................................................................................24
8.1 Safety instructions ............................................................................................................................................................24
8.2 Installing a device on the pipe ...................................................................................................................................25
8.3 Wiring .......................................................................................................................................................................................28
8.3.1 Assembling the male or female connector (accessories) .........................................................28
8.3.2 Making the installation equipotential .............................................................................................28
8.3.3 Wiring a device variant with a single M12 fixed connector .....................................................30
8.3.4 Wiring a device variant with 2 M12 fixed connectors................................................................32
9 ADJUSTMENT AND START-UP ................................................................................................................................................35
9.1 Safety instructions ............................................................................................................................................................35
9.2 Knowing the operating levels .....................................................................................................................................35
9.3 Using the navigation button ........................................................................................................................................36
9.4 Using the dynamic functions .......................................................................................................................................38
9.5 Entering a numerical value (example) ...................................................................................................................38
9.6 Browsing in a menu (example) ..................................................................................................................................39
9.7 Knowing the display .........................................................................................................................................................40
9.7.1 Knowing the icons and LEDs .........................................................................................................40
9.7.2 Knowing the display at the power-up of the device ..................................................................41
9.8 Knowing the Process level ...........................................................................................................................................41
9.9 Accessing the Configuration level ...........................................................................................................................42
9.10 Knowing the structure of the menus on the Configuration level ............................................................43
9.11 Knowing the Parameters Menu .................................................................................................................................47
9.11.1 Transferring data from one device to another .............................................................................47
9.11.2 Setting the date and time ................................................................................................................47
9.11.3 Modifying the PARAM menu access code ..................................................................................48
9.11.4 Restoring the default parameters of the Process level and the outputs ..............................48
9.11.5 Setting the data displayed in the Process level .........................................................................49
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9.11.6 Displaying the lowest and highest values measured ................................................................50
9.11.7 Setting the display contrast and brightness ...............................................................................50
9.11.8 Choosing the output wiring mode .................................................................................................51
9.11.9 Setting the parameters of the current outputs ...........................................................................51
9.11.10 Setting the parameters of the transistor outputs .......................................................................53
9.11.11 Setting the sensor parameters .......................................................................................................54
9.12 Knowing the Calibration menu ...................................................................................................................................55
9.12.1 Activating/deactivating the Hold function ....................................................................................55
9.12.2 Modifying the Calibration menu access code ............................................................................56
9.12.3 Adjusting the current outputs .........................................................................................................56
9.12.4 Calibrating the pH sensor ...............................................................................................................57
9.12.5 Calibrating the Redox- ("ORP"-) sensor ......................................................................................61
9.12.6 Entering an offset for the temperature measurement ...............................................................64
9.13 Knowing the Diagnostic menu ...................................................................................................................................64
9.13.1 Modifying the Diagnostic menu access code ............................................................................64
9.13.2 Monitoring the condition of the probe ..........................................................................................64
9.13.3 Monitoring the fluid temperature ....................................................................................................66
9.14 Knowing the Test menu .................................................................................................................................................67
9.14.1 Modifying the Test menu access code .........................................................................................67
9.14.2 Checking the outputs functions .....................................................................................................67
9.14.3 Checking the outputs behaviour .....................................................................................................67
9.15 Knowing the Information menu .................................................................................................................................68
9.15.1 Reading the cause of events linked to icons ..............................................................................68
9.15.2 Reading the software versions ........................................................................................................68
9.15.3 Reading some identification informations of the device ............................................................68
10 MAINTENANCE AND TROUBLESHOOTING .....................................................................................................................69
10.1 Safety instructions ............................................................................................................................................................69
10.2 Cleaning the device ..........................................................................................................................................................69
10.2.1 Cleaning the pH/Redox ("ORP") probe .......................................................................................70
10.3 Replacing the probe .........................................................................................................................................................70
10.4 Replacing the seal of the sensor holder ...............................................................................................................72
10.5 Solving a problem .............................................................................................................................................................73
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11 SPARE PARTS AND ACCESSORIES ....................................................................................................................................78
12 PACKAGING, TRANSPORT ........................................................................................................................................................79
13 STORAGE ............................................................................................................................................................................................79
14 DISPOSAL OF THE DEVICE ........................................................................................................................................................79
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About the Operating Instructions
1 ABOUT THE OPERATING INSTRUCTIONS
The Operating Instructions describe the entire lifecycle of the device. Please keep the Operating Instructions in a
safe place, accessible to all users and any new owners.
The Operating Instructions contains important safety information.
Failure to comply with these instructions can lead to hazardous situations. Pay attention in particular to the
chapters "Basic safety information" and "Intended use".
▶Irrespective of the device variant, the Operating Instructions must be read and understood.
1.1 Definition of the word "device"
The word "device" used within these Operating Instructions refers to the Type 8202 ELEMENT pH-meter and
redox-meter.
1.2 Validity of the Operating Instructions
The Operating Instructions are valid for the Type 8202 ELEMENT pH-meter and redox-meter, version V2, .
Mention V2 is given on the device Type-label. Refer to chpt. 5.4.
1.3 Symbols used
DANGER
Warns against an imminent danger.
▶Failure to observe this warning can result in death or in serious injury.
WARNING
Warns against a potentially dangerous situation.
▶Failure to observe this warning can result in serious injury or even death.
CAUTION
Warns against a possible risk.
▶Failure to observe this warning can result in substantial or minor injuries.
NOTICE
Warns against material damage.
Advice or important recommendations.
Refers to information contained in the Operating Instructions or in other documents.
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About the Operating Instructions
▶Indicates an instruction for risk prevention.
→Indicates a work step that you must carry out.
Indicates a result.
2 INTENDED USE
Use of the device that does not comply with the instructions could present risks to people, nearby
installations and the environment.
The Type 8202 ELEMENT pH-meter and redox-meter is intended for the measurement of one of the following
physical quantities:
- the pH in clean liquids or liquids containing solids, sulphides or proteins.
- the oxidation reduction potential in clean liquids or liquids containing solids, sulphides or proteins which
may present low conductivity.
▶Use the device in compliance with the characteristics and start-up and use conditions specified in the con-
tractual documents and in the Operating Instructions.
▶Do not use the device for security applications.
▶Only operate a device in perfect working order.
▶Store, transport, install and operate the device properly.
▶Only use the device as intended.
3 BASIC SAFETY INFORMATION
This safety information does not take into account any contingencies or occurrences that may arise during instal-
lation, use and maintenance of the device.
The operating company is responsible for the respect of the local safety regulations including staff safety.
Risk of injury due to electrical voltage.
▶Before carrying out work on the system or the device, disconnect the electrical power for all the conductors
and isolate it.
▶If the device is installed either in a wet environment or outdoors, all the electrical voltages must be of max.
35 V DC.
▶All equipment connected to the device must be double insulated with respect to the mains according to the
standard UL/EN 61010-1.
▶Observe all applicable accident protection and safety regulations for electrical equipment.
Risk of injury due to pressure in the installation.
▶Before any intervention in the installation, stop the circulation of fluid, cut off the pressure and drain the pipe.
▶Before any intervention in the installation, make sure there is no pressure in the pipe.
▶Observe the dependency between the fluid temperature and the fluid pressure.
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About the Operating Instructions
Risk of burns due to high fluid temperatures.
▶Use safety gloves to handle the device.
▶Before opening the pipe, stop the circulation of fluid and drain the pipe.
▶Before opening the pipe, make sure the pipe is completely empty.
Risk of injury due to the nature of the fluid.
▶Respect the prevailing regulations on accident prevention and safety relating to the use of dangerous fluids.
Various dangerous situations.
To avoid injury, observe the following instructions:
▶Do not use the device in explosive atmospheres.
▶Do not use the device in an environment incompatible with the device materials.
▶Do not use fluid that is incompatible with the device materials. Find the compatibility chart on our homepage:
country.burkert.com
▶Do not subject the device to mechanical stress.
▶Do not make any modifications to the device.
▶Prevent any unintentional power supply switch-on
▶Only qualified and skilled staff may carry out the installation and maintenance work.
▶Ensure a defined or controlled restart of the process after a power supply interruption.
▶Observe the general technical rules.
NOTICE
Elements and components that are both sensitive to electrostatic discharges
▶The device contains electronic components that are sensitive to electrostatic discharges. The components
may be damaged if they are touched by an electrostatically charged person or object. In the worst case sce-
nario, the components are instantly destroyed or disabled as soon as they are activated.
▶To minimise or even avoid any damage caused by an electrostatic discharge, take all the precautions that are
described in the EN 61340-5-1 norm.
▶Do not touch any of the live electrical components.
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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 sales offices are available on the internet at: country.burkert.com
4.2 Warranty conditions
The condition governing the legal warranty is the conforming use of the device in observance of the operating
conditions specified in the Operating Instructions.
4.3 Information on the Internet
You can find the Operating Instructions and technical data sheets for Type 8202 at: country.burkert.com
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Description
5 DESCRIPTION
5.1 Area of application
The device is intended solely for the measurement of:
• the pH in clean liquids or liquids containing solids, sulphides or proteins.
• or the oxidation reduction potential ("ORP") in clean liquids or liquids containing solids, sulphides or proteins
which may present low conductivity.
Thanks to two fully adjustable transistor outputs, the device 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 Construction of the 8202
The device comprises:
• a module for measuring process values, comprising:
- a pH or Redox ("ORP") sensor measuring a potential difference (PD) in mV
- a Pt1000 temperature sensor built in the holder of the pH or Redox ("ORP") 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 device with pH sensor only)
- acquisition of the resistance measured and conversion into temperature
• an electrical housing which can include a display module. The display module has a navigation button used
to read and/or configure the parameters of the device. The display module is available as an accessory (see
chpt. 11).
One device variant 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 device variant, electrical connection is done via an M12, 5-point, male
fixed connector.
One device variant 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 device variant, electrical connection is done via an M12,
5-point, male fixed connector and an M12, 5-point, female fixed connector.
5.3 pH or Redox ("ORP") probe
The device can be fitted with a standard probe 120 mm long, measuring the pH or the oxidation reduction
potential ("ORP").
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 ("ORP") probe is immersed in a solution, an exchange of electrons occurs based on the oxi-
dizing and reducing effects of an electrolyte. The resulting voltage is the oxidation reduction potential ("ORP").
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Description
5.4 Type label
8202 pH/ORP Transmitter V2
Supply: 14-36V 40W Max.
Output: 1x 4-20mA 2x Trans. 1A Max
Cell: pH -2/16;ORP +-2V 120mm PG13,5
Process: Temp:0...+50°C, PN 16 Bar
Limited by cell and materials fitting
IP65 -IP67 W4XMU
FDA
S/N:2279
00xxxxxx
7
1:V+
2:NPN/PNP1
3:0V
4:NPN/PNP2
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3
4
5
6
8
9
11
12
14
16
17
10
13
15
1. Type of the device, measured quantity
2. Device version
3. Maximum power consumption
4. Nominal pressure of the fluid. The nominal pressure that is given on the Type label of a Type 8202 ELEMENT
device is valid for a device without probe.
5. Manufacturing code
6. Pin assignment of the electrical connection
7. Certification
8. Article number
9. Serial number
10. Conformity marking
11. Certification
12. IP-Code
13. The fluid temperature and the fluid pressure are limited by the probe used and by the materials of the fitting
used
14. Temperature range of the fluid. The temperature range that is given on the Type label of a Type 8202 ELEMENT
is valid for a device without probe.
15. Specifications of the probe
16. Specifications of the outputs
17. Operating voltage
Fig. 1: Type label of the device Type 8202 ELEMENT (example)
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Technical data
6 TECHNICAL DATA
6.1 Conditions of use
Ambient temperature –10...+60 °C, without pH probe or redox probe
Air humidity < 85%, without condensation
Use Indoor and outdoor
▶Protect the device against electromagnetic interference, ultravio-
let rays and, when installed outdoors, the effects of the climatic
conditions.
IP-Code
1) not evaluated by UL
IP67 1) and IP65 1) according to IEC / EN 60529
Mating connectors must be wired, plugged, and tightened.
Housing lid must be fully tightened and locked
Operating condition Continuous operation
Equipment mobility Fixed device
Degree of pollution Degree 2 according to UL/EN 61010 -1
Installation category Category I according to UL/EN 61010-1
Maximum height above sea level 2000 m
6.2 Conformity to standards and directives
The applied standards, which verify conformity with the EU directives, can be found on the EU-type examination
certificate and/or the EU declaration of conformity (if applicable).
6.2.1 Conformity to the Pressure Equipment Directive
▶Make sure that the device materials are compatible with the fluid.
▶Make sure that the pipe DN is adapted for the device.
▶Observe the fluid nominal pressure (PN) for the device. The nominal pressure (PN) is given by the device
manufacturer.
The device conforms to Article 4, Paragraph 1 of the Pressure Equipment Directive 2014/68/EU under the fol-
lowing conditions:
• Device used on a piping (PS = maximum admissible pressure; DN = nominal diameter of the pipe)
Type of fluid Conditions
Fluid group 1, Article 4, Paragraph 1.c.i DN≤25
Fluid group 2, Article 4, Paragraph 1.c.i DN≤32
or PSxDN≤1000 bar
Fluid group 1, Article 4, Paragraph 1.c.ii DN≤25
or PSxDN≤2000 bar
Fluid group 2, Article 4, Paragraph 1.c.ii
DN≤200
or PS≤10 bar
or PSxDN≤5000 bar
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Technical data
• Device used on a vessel (PS = maximum admissible pressure)
Type of fluid Conditions
Fluid group 1, Article 4, Paragraph 1.a.i PS ≤ 200 bar
Fluid group 2, Article 4, Paragraph 1.a.i PS ≤ 1000 bar
Fluid group 1, Article 4, Paragraph 1.a.ii PS ≤ 500 bar
Fluid group 2, Article 4, Paragraph 1.a.ii PS ≤ 1000 bar
6.2.2 UL certification
The devices with variable key PU01 or PU02 are UL certified devices and comply also with the following
standards:
• UL 61010-1
• CAN/CSA-C22.2 n°61010-1
Identification on the device Certification Variable key
UL recognized PU01
Measuring
Equipment
EXXXXXX
®
UL listed PU02
6.3 Dimensions of the device
→Please refer to the technical data sheets regarding the device, available at: country.burkert.com
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Technical data
6.4 Mechanical data
PC
silicone
PPS
EPDM
PPS
PVDF
PVC or PVDF
EPDM
PVDF
Stainless steel
1.4571 (316Ti)
PPS CF30
Nickel-plated brass
(or stainless steel)
pH/Redox ("ORP")
probe
Stainless steel
Part Material
Housing stainless steel 316L
1.4404, PPS
Housing seals EPDM
Housing lid PC
Housing-lid seal silicone
Display module PC, PBT
M12 male connector,
M12 female connector
• nickel-plated brass
• stainless steel, on
request
Support plate of the
M12 male connector
or M12 female
connector
PPS CF30
Screws stainless steel
Nut PVC or PVDF
Parts in contact with the fluid
• Sensor holder • PVDF, stainless
steel 1.4571
(316Ti)
• Seal of the sensor
holder
• EPDM
• pH probe or Redox
probe
• refer to the Oper-
ating Instructions of
the probe
Fig. 2: Materials used in the Type 8202 ELEMENT pH and redox-meter (without the probe)
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Technical data
6.5 Fluid data
Pipe diameter DN25 to DN110
(DN15 to DN20 under specific conditions)
Type of fitting Type S022
Nut between the 8202 and the fitting G 1 1/2'' internal thread
Fluid temperature The fluid temperature may be restricted by the probe
used. Refer to the related Operating Instructions.
The fluid temperature may be restricted by the fluid
pressure, the material of the nut and the material of the
fitting used.
• with a PVDF nut (see also Fig. 3 and Fig. 5) • –20...+130 °C
• with a PVC nut (see also Fig. 3 and Fig. 4) • 0...+50 °C
Fluid pressure
2) not evaluated by UL
PN16 2)
The fluid pressure may be restricted by the fluid
temperature, the material of the nut and the material of
the fitting used. Refer to Fig. 3, Fig. 4 and Fig. 5.
The fluid pressure may also be restricted by the probe
used. Refer to the related Operating Instructions.
pH measurement
• Measurement range • –2...16 pH or –580....+580 mV
• Resolution • 0.001 pH or 0.1 mV
• Measurement deviation • ±0.02 pH or 0.5 mV
• Recommended min. divergence of the pH range
associated to the 4...20 mA signal
• 0.5 pH unit or 30 mV
(eg: range 6,7...7,2 pH or –20...+10 mV associated
to the 4...20 mA output current)
Redox potential measurement
• Measurement range • –2000...+2000 mV
• Resolution • 1 mV
• Measurement deviation • ±3 mV
• Recommended min. divergence of the redox potential
range associated to the 4...20 mA signal
• 50 mV
(eg: range 1550...1600 mV associated to the
4...20 mA output current)
Temperature measurement
• Measurement range • –40...+130 °C
• Resolution • 0.1 °C
• Measurement deviation • ±1 °C
• Recommended min. divergence of the temperature
range associated to the 4...20 mA signal
• 10 °C
(eg: range +10...+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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Technical data
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0 -20 0 +20 +40 +60 +80 +100 +120
T ( ° C)
P (bar)
A
PVDF
PVC
B
+140
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)
PVDF
• 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
Fig. 3: Dependency between the fluid temperature and the fluid pressure, Type 8202 without probe, with a PVC nut or
PVDF nut
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
00 +20 +40 +60 T (°C)
P (bar)
PVC + PP
-20
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)
Metal
P = Fluid pressure
T = Fluid temperature
Fig. 4: Dependency between the fluid temperature and the fluid pressure, Type 8202 without probe, with a PVC nut, and a
Type S022 in metal, PVC or PP
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0-20 0 +20 +40 +60 +80 +100 +140
PVC
PP
T (°C)
P (bar)
PVC + PP
+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)
Metal
P = Fluid pressure
T = Fluid temperature
Fig. 5: Dependency between the fluid temperature and the fluid pressure, Type 8202 without probe, with a PVDF nut and a
Type S022 in metal, PVC or PP
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Technical data
6.6 Electrical data
Operating voltage
• Device variant with 3 outputs • 14...36 V DC
• connection to main supply: permanent through external safety extra-
low voltage (SELV) and through limited power source (LPS)
• filtered and regulated
• Device variant with 4 outputs • 12...36 V DC
• connection to main supply: permanent through external safety extra-
low voltage (SELV) and through limited power source (LPS)
• filtered and regulated
Power source
(not supplied)
• limited power source according to UL/EN 60950-1 standard
• or limited energy circuit according to UL/EN 61010-1,
Paragraph 9.4
Current consumption
• Device variant with 3 outputs • 25 mA max. (at 14 V DC)
• Device variant with 4 outputs • 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 yes
Protection against voltage spikes yes
Transistor output polarized
• type • NPN or PNP. Through wiring and through software setting
• NPN output • 1...36 V DC, 700 mA max. (or 500 mA max. if 2 transistor outputs
are wired)
• PNP output • supply voltage, 700 mA max. (or 500 mA max. if 2 transistor
outputs are wired)
• protection • galvanically insulated, protected against overvoltages, polarity
reversals and short-circuits
Current output 4...20 mA, sink or source through wiring and through software
setting, 22 mA to indicate a fault (software setting)
• Response time (10...90%) • 150 ms (default value)
• Device variant with 1 current output • maximum loop impedance: 1100W at 36 V DC, 610W at
24 V DC, 180W at 14 V DC
• Device variant with 2 current outputs • maximum loop impedance: 1100W at 36 V DC, 610W at
24 V DC, 100W at 12 V DC
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Technical data
6.7 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 article number 917116, use a shielded cable:
• diameter: 3...6.5 mm
• wire cross section: max. 0.75 mm2
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 article number 917116, use a shielded cable:
• diameter: 3...6.5 mm
• wire cross section: max. 0.75 mm2
6.8 pH/Redox ("ORP") probe
The pH or redox ("ORP") 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 Operating Instructions of the probe used.
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Assembly
7 ASSEMBLY
7.1 Safety instructions
DANGER
Risk of injury due to electrical voltage.
▶Before carrying out work on the system or the device, disconnect the electrical power for all the conductors
and isolate it.
▶Observe all applicable accident protection and safety regulations for electrical equipment.
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 restart of the installation.
▶Avoid unintentional activation of the installation.
▶Guarantee a set or controlled restarting of the process after any intervention on the device.
7.2 Removing the housing lid
NOTICE
The tightness of the device is not guaranteed when the housing lid is removed.
▶Prevent the projection of liquid inside the housing.
The device may be damaged if a metal component comes into contact with the electronics.
▶Prevent contact of the electronics with a metallic item.
2
1
→[1] Turn the housing lid counterclockwise
with an angle of about 15° to unlock it.
→[2] Remove the housing lid.
If the housing lid grips to the housing:
→Use an appropriate tool to unlock the
housing lid, taking care not to scratch the
glass.
→Insert an apropriate tool into the groove
of the housing.
→Lever the housing lid up.
Fig. 6: Removing the housing lid
English
Type 8202 ELEMENT