Burkert 8221 Operating Instructions Manual
Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
Type 8221
Conductivity Probe
Leitfähigkeitssonde
Sonde de conductivité
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© 2013 Bürkert SAS
Operating Instructions 1307/0_EU-ML_00565354_Original_FR
1. ABOUT THIS MANUAL .................................................................................2
1.1. Symbols used .............................................................................. 2
1.2. Definition of the word "probe" .................................................2
2. INTENDED USE ................................................................................................3
3. BASIC SAFETY INFORMATION ...............................................................3
4. GENERAL INFORMATION ...........................................................................4
4.1. International contacts ...............................................................4
4.2. Warranty conditions ................................................................... 4
4.3. Information on the internet ........................................................ 4
5. DESCRIPTION ...................................................................................................5
5.1. Area of application...................................................................... 5
5.2. Description of the name plate ..................................................5
6. TECHNICAL DATA ...........................................................................................5
6.1. Mechanical data .......................................................................... 5
6.2. Certifications ................................................................................6
6.3. General technical data ..............................................................6
6.4. Dimensions .................................................................................10
7. INSTALLATION ............................................................................................... 14
7.1. Safety instructions ....................................................................14
7.2. Installation onto the pipe .........................................................14
7.2.1. Installation of a 8221 with 2 electrodes ........................15
7.2.2. Installation of a 8221 with G1¼" connection .............16
7.2.3. Installation of a 8221 with clamp connection ...............16
7.2.4. Installation of a 8221 with 2" (DN50/40) connection 17
7.2.5. Installation of a 8221 with PG13.5 connection ...........17
7.2.6. Installation of a 8221 with PG13.5 connection
onto a direct welding holder .............................................17
7.2.7. Installation of a 8221 with PG13.5 connection
onto a G1¼" threaded hygienic holder..........................18
7.2.8. Installation of a 8221 with PG13.5 connection
onto a hygienic holder with clamp connection .............19
8. WIRING ...............................................................................................................19
8.1. Wiring of the 8221 with 4 electrodes, with 1.5"
clamp (short and long) or G1¼" connections ...................19
8.2. Wiring of the 8221 with 4 electrodes, with 2"
clamp or 2" (DN50/40) connection, adapted for
GEA Tuchenhagen VARINLINE process connections .....20
8.3. Wiring of the 8221 with 4 electrodes, with
PG13.5 connection ..................................................................21
8.4. Wiring of a 8221 with 2 electrodes .....................................21
9. CALIBRATION .................................................................................................22
9.1. Calibration while the probe is disassembled from
process ......................................................................................22
9.2. Calibration in the process .......................................................22
10. MAINTENANCE AND TROUBLESHOOTING ................................ 23
10.1. Safety instructions ...................................................................23
10.2. Maintenance of the probe .....................................................23
11. SPARE PARTS AND ACCESSORIES ...............................................24
12. PACKAGING, TRANSPORT ...................................................................24
13. STORAGE ....................................................................................................... 25
14. DISPOSAL OF THE PROBE .................................................................. 25
Type 8221
1
English
1. ABOUT THIS MANUAL
This manual describes the entire life cycle of the probe. 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 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.
attention
Warns against a possible risk.
• Failure to observe this warning can result in substantial or minor
injuries.
note
Warns 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. Definition of the word "probe"
The word "probe" used within this manual always refers to the conductivity probe type 8221.
2
About this manual
Type 8221
English
2. INTENDED USE
Use of the probe that does not comply with the instructions
could present risks to people, nearby installations and the
environment.
• The conductivity probe type 8221 is used to measure the electrolytic conductivity of a solution.
• This probe must be used in compliance with the characteristics
and commissioning and use conditions specified in the contractual documents and in the operating instructions.
• Requirements for the safe and proper operation of the probe
are proper transport, storage and installation, as well as careful
operation and maintenance.
• Only use the probe as intended.
→ Observe any existing restraints when the probe is exported.
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 probe.
• 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 the electrical power source of all the conductors and
isolate it 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 probe.
• Stop the circulation of fluid and drain the pipe 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.
3
Intended use
Type 8221
English
Various dangerous situations.
To avoid injury take care:
• not to use the probe in explosive atmospheres.
• not to use this probe in an environment incompatible with the
materials from which it is made.
• not to use fluid that is incompatible with the materials of which
the probe is made.
• to carry out the installation and maintenance work by qualified
and skilled staff with the appropriate tools.
• to use the probe only if in perfect working order and in compliance with the instructions provided in the operating instructions.
• to observe the general technical rules during the planning and
use of the probe.
note
The probe may be damaged by the fluid in contact with.
• Systematically check the chemical compatibility of the component materials of the probe 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).
4. GENERAL INFORMATION
4.1. International contacts
The addresses of our international sales offices are available on the
last page of this manual.
They are also available on the internet at: www.burkert.com
4.2. Warranty conditions
The condition governing the legal warranty is the conforming use
of the probe type 8221 in observance of the operating conditions
specified in this manual.
4.3. Information on the internet
You can find the operating instructions and technical data sheets
regarding the type 8221 at: www.burkert.com
4
General information
Type 8221
English
5. DESCRIPTION
5.1. Area of application
The conductivity probe type 8221 is used to measure the electrolytic
conductivity of a solution.
5.2. Description of the name plate
COND 8221 PEEK SST CLAMP
Conductivity probe
Leitfähigkeitssonde
ID No 00563269
WO: 2130329 / 033
1
2
4
3
56
1. Measured quantity and type of the probe
2. Material of the probe
3. Type of connection
4. Version of the probe
5. Order code
6. Construction code
Fig. 1: Name plate of the 8221
6. TECHNICAL DATA
6.1. Mechanical data
Process
connection
1.5" clamp • G1¼"
• 1.5" clamp,
short and
long
• 2" clamp
• 2" connection
DN50/40
PG13.5
Number of
electrodes
2 4
Materials
Electrodes Stainless steel Stainless steel
1.4435/316L
Stainless steel
1.4435/316L
Frame Stainless steel
PTFE
Stainless steel
1.4435/316L
PEEK with FDA
approval (CFR
177.2415)
PEEK with FDA
approval (CFR
177.2415)
Seal EPDM EPDM with FDA
approval
EPDM with FDA
approval
Surface
quality
0.4 µm,
electro-polished
0.4 µm,
electro-polished
0.4 µm,
electro-polished
* Adapted for GEA Tuchenhagen VARINLINE process connections
5
Description
Type 8221
English
6.2. Certifications
Design according to EHEDG for:
• 8221 1.5" clamp connection short insertion depth;
• 8221 1.5" clamp connection long insertion depth;
• 8221 2" clamp connection.
Design approved by EHEDG for:
• 8221 2" (DN50/40) connection, adapted for GEA Tuchenhagen
VARINLINE process connections;
• 8221 PG13.5
6.3. General technical data
Tab. 1 : Temperature/pressure dependency diagram
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
+140
20
19
18
17
A
B
C
Pressure:
[bar]
Temperature [°C]
Operating range for the conductivity probe:
A: with 2 electrodes, 1.5" clamp connection
B: with 4 électrodes, G1¼" and 1.5" clamp connections (short
and long insertion depth)
C: with 4 électrodes, 2" clamp, 2" (DN50/40) connection, adapted
for GEA Tuchenhagen VARINLINE process connections and
PG13.5 connections
6
Technical data
Type 8221
English
8221 with 2 electrodes, 1.5" clamp connection
Order code 564898 562261 564899
Measurement
range
0.05...20 µS/cm
-1)
1...200 µS/cm
-1)
5...5000 µS/cm
-1)
Linearity
1)
(relative)
±0.5... 5%
Cell
constant
2)
0.01 cm
-1
0.1 cm
-1
1 cm
-1
Max. fluid
temperature
120 °C
Fluid
pressure
7 bar max.
Temperature
sensor
Pt1000
Electrical
connection
Cable, length 3 m, instrument side with open wire.
1)
± 0.5% accuracy can be achieved when calibration is performed in
a conductivity range close to that of the process. With an extended
measuring range, the linearity is about 5%. The linearity also
depends on the device used.
2)
Value measured according to the Bürkert standard procedure. The
cell constant may be influenced by the mounting position.
8221 with 4 electrodes and G1¼"
connection
Order code 562240
Measurement range
0.1 µS/cm... 500 mS.cm
-1
Linearity
1)
(relative)
±0.5... 5%
Cell constant
2)
0.147 cm
-1
Max. fluid temperature
-20 to 135 °C. max
Fluid pressure
6 bar max.
Temperature sensor
Pt1000
Electrical connection
High temperature cable, length 5 m,
instrument side with open wire.
1)
± 0.5% accuracy can be achieved when calibration is performed in
a conductivity range close to that of the process. With an extended
measuring range, the linearity is about 5%. The linearity also
depends on the device used.
2)
Value measured according to the Bürkert standard procedure. The
cell constant may be influenced by the mounting position.
7
Technical data
Type 8221
English
8221 with 4 electrodes and 1,5"
clamp connection
Short insertion depth
Order code 557719
Measurement range
0.1 µS/cm... 500 mS.cm
-1
Linearity
1)
(relative)
±0.5... 5%
Cell constant
2)
0.147 cm
-1
Max. fluid temperature
-20 to 135 °C. max
Fluid pressure
6 bar max.
Temperature sensor
Pt1000
Electrical connection
High temperature cable, length 5 m,
instrument side with open wire.
1)
± 0.5% accuracy can be achieved when calibration is performed in
a conductivity range close to that of the process. With an extended
measuring range, the linearity is about 5%. The linearity also
depends on the device used.
2)
Value measured according to the Bürkert standard procedure. The
cell constant may be influenced by the mounting position.
8221 with 4 electrodes and 1,5"
clamp connection
Long insertion depth
Order code 558884
Measurement range
0.1 µS/cm... 500 mS.cm
-1
Linearity
1)
(relative)
±0.5... 5%
Cell constant
2)
0.147 cm
-1
Max. fluid temperature
-20 to 135 °C. max
Fluid pressure
6 bar max.
Temperature sensor
Pt1000
Electrical connection
High temperature cable, length 5 m,
instrument side with open wire.
1)
± 0.5% accuracy can be achieved when calibration is performed in
a conductivity range close to that of the process. With an extended
measuring range, the linearity is about 5%. The linearity also
depends on the device used.
2)
Value measured according to the Bürkert standard procedure. The
cell constant may be influenced by the mounting position.
8
Technical data
Type 8221
English
8221 with 4 electrodes and 2"
clamp connection
Order code 559120
Measurement range
1 µS/cm... 500 mS.cm
-1
Linearity
1)
(relative)
±0.5... 5%
Cell constant
2)
0.360 cm
-1
Max. fluid temperature
-20 to 150 °C. max
Fluid pressure
20 bar max. from -20 to 135 °C and
10 bar max. at 150 °C
Temperature sensor
Pt1000
Electrical connection
VarioPin (VP 6.0) male connector
1)
± 0.5% accuracy can be achieved when calibration is performed in
a conductivity range close to that of the process. With an extended
measuring range, the linearity is about 5%. The linearity also
depends on the device used.
2)
Value measured according to the Bürkert standard procedure. The
cell constant may be influenced by the mounting position.
8221 with 4 electrodes and 2"
(DN50/40) connection, adapted
for GEA Tuchenhagen VARINLINE
process connections
Order code
563269
Measurement range
1 µS/cm... 500 mS.cm
-1
Linearity
1)
(relative)
±0.5... 5%
Cell constant
2)
0.360 cm
-1
Max. fluid temperature
-20 to 150 °C. max
Fluid pressure
20 bar max. from -20 to 135 °C and
10 bar max. at 150 °C
Temperature sensor
Pt1000
Electrical connection
VarioPin (VP 6.0) male connector
1)
± 0.5% accuracy can be achieved when calibration is performed in
a conductivity range close to that of the process. With an extended
measuring range, the linearity is about 5%. The linearity also
depends on the device used.
2)
Value measured according to the Bürkert standard procedure. The
cell constant may be influenced by the mounting position.
9
Technical data
Type 8221
English
8221 with 4 electrodes and PG13.5
connection
Order code 563186
Measurement range
1 µS/cm... 500 mS.cm
-1
Linearity
1)
(relative)
±0.5... 5%
Cell constant
2)
0.360 cm
-1
Max. fluid temperature
-20 to 150 °C. max
Fluid pressure
20 bar max. from -20 to 135 °C and
10 bar max. at 150 °C
Temperature sensor
Pt1000
Electrical connection
VarioPin (VP 6.0) male connector
1)
± 0.5% accuracy can be achieved when calibration is performed in
a conductivity range close to that of the process. With an extended
measuring range, the linearity is about 5%. The linearity also
depends on the device used.
2)
Value measured according to the Bürkert standard procedure. The
cell constant may be influenced by the mounting position.
6.4. Dimensions
C
A
D
B
12.7
3 m
Order code Dimensions
A [mm]
Dimensions
B [mm]
Dimensions
C [mm]
Dimensions
D [mm]
564899 50.5 94 67 7.9
562261 50.5 94 67 7.9
564898 50.5 154 127 50
Fig. 2: Dimensions [mm] of a 8221 conductivity probe with 2
electrodes and 1,5" clamp connection
10
Technical data
Type 8221
English
24 OP =28 1
65 8
20
185
Ø 13
Fig. 3: Dimensions [mm] of a 8221 conductivity probe with 4
electrodes and G1¼" connection
ø13
ø24
ø50.5
ø30
24
50
141.5
21
Fig. 4: Dimensions [mm] of a 8221 conductivity probe with 4
electrodes and 1,5" clamp connection, short version
11
Technical data
Type 8221
English
ø13
ø24
ø50.5
24 68
139.5
Fig. 5: Dimensions [mm] of a 8221 conductivity probe with 4
electrodes and 1,5" clamp connection, long version
79
3
ø16
17
ø64
0
-0.2
Fig. 6: Dimensions [mm] of a 8221 conductivity probe with 4
electrodes and 2" clamp connection
12
Technical data
Type 8221
English
Ø 21
10921
Fig. 7: Dimensions [mm] of a 8221 conductivity probe with 4
electrodes and 2" (DN50/40) connection, adapted for
GEA Tuchenhagen VARINLINE process connections
Ø 12
PG 13.5
174.5
120
AF19
Fig. 8: Dimensions [mm] of a 8221 conductivity probe with 4
electrodes and PG13.5 connection
13
Technical data
Type 8221
English
7. INSTALLATION
7.1. Safety instructions
danger
Risk of injury 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.
Risk of injury 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.
Risk of injury due to high fluid temperatures.
• Use safety gloves to handle the probe.
• Stop the circulation of fluid and drain the pipe before loosening
the process connections.
Risk of injury due to the nature of the fluid.
• Respect the regulations on accident prevention and safety relating to the use of aggressive fluids.
Warning
Risk of injury due to nonconforming installation.
• The electrical and fluid installation can only be carried out by
qualified and skilled staff with the appropriate tools.
• Respect the assembly instructions for the fitting and/or the
holder used.
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.
7.2. Installation onto the pipe
danger
Risk of injury 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.
Risk of injury due to the nature of the fluid.
• Respect the regulations on accident prevention and safety relating to the use of aggressive fluids.
14
Installation
Type 8221
English
7.2.1. Installation of a 8221 with 2
electrodes
Avoid the formation of air bubbles around the probe.
→ For the order code 564898 carry out the mounting pro-
cedure on Fig. 9.
→ For the order code 564899 and 562261 carry out the
mounting procedure on Fig. 10.
1
2
4
6
3
5
Flow direction (indicated by the
arrows on the probe)
→ Put the seal 4 onto
the hygienic teefitting 6.
→ Put the probe 2 onto
the seal 4.
→ Align the hole 3 of
the probe with the
outlet 5 of the teefitting. The arrows on
the probe indicate
how to place the
probe.
→ Fix the clamp of the
probe 2 and the
clamp of the fitting
with the flange clamp
1.
Fig. 9: Installation of a 8221 with 2 electrodes and with order
code 564898
1
2
4
3
5
Flow direction (indicated by the
arrows on the probe)
→ Put the seal 4 onto
the hygienic tee-fitting
5.
→ Put the probe 2 onto
the seal 4.
→ Align the hole 3 of the
probe with the flow
direction. The arrows
on the probe indicate
how to place the
probe.
→ Fix the clamp of the
probe 2 and the
clamp of the fitting
with the flange clamp
1.
Fig. 10: Installation of a 8221 with 2 electrodes and with order
code 564899 or 562261
15
Installation
Type 8221
English
→ Make sure you follow the recommendations below when con-
necting the conductivity probe.
The cell constant and the linearity of the probe may vary
depending on the mounting position. A symmetrical setup is
recommended:
• Leave a clearance of 60mm minimum diameter around the
probe.
• Connection pieces made of non-conductive material
should preferably be used.
To achieve high precision the cell constant should be calibrated in the final setup:
• Make sure that all 4 electrodes are completely and continuously immersed in the measuring sample.
A: ø 60 mm min
A
A
Fig. 12: Placing the probe onto the pipe
7.2.2. Installation of a 8221 with G1¼"
connection
The 8221 probe is screwed onto a 1¼" weld-in socket, with order
code 737241, fixed onto the pipe.
1
3
2
→ Insert the probe 1 inside the socket 3.
→ Screw the nut 2 onto the socket 3.
Fig. 11: Installation of a 8221 G1¼" connection
7.2.3. Installation of a 8221 with clamp
connection
→ Make sure that the process connection is clean.
→ Clean it if necessary.
16
Installation
Type 8221
English
3
2
1
→ Check that the seal is on the probe.
→ Install the 8221 with clamp connection 2 onto the clamp of the
pipe 1.
→ Place the clamp together.
→ Fix the clamps with the flange clamp 3.
Fig. 13: Installation of a 8221 clamp connection
7.2.4. Installation of a 8221 with 2"
(DN50/40) connection
The 8221 probe with 2" (DN50/40) connection is mounted onto the
GEA Tuchenhagen VARINLINE process connections to the appropriate dimensions.
7.2.5. Installation of a 8221 with PG13.5
connection
The probe 8221 with PG13.5 connection is mounted onto a holder:
• 8200 direct welding holder (see 7.2.6);
• 8200 hygienic holder with G1¼" threaded connection (see 7.2.7);
• 8200 hygienic holder with clamp connection (see 7.2.8).
To install the holder, refer to the 8200 direct welding holder
and to the 8200 hygienic holder using manuals.
7.2.6. Installation of a 8221 with PG13.5
connection onto a direct welding
holder
The holder is intended only for mounting probes with a
length of 120 mm.
Make sure the welded area has cooled down before
inserting the probe.
17
Installation
Type 8221
English
1
2
3
→ Make sure the direct welding holder is mounted onto the pipe.
→ Ensure there is no damage to the probe or the holder.
→ Check that all O-rings are in place in their appropriate
grooves, and are free of damage.
→ Insert the seal pusher 2 into the holder 3.
→ Screw the probe 1 into the seal pusher 2 using a locking
torque between 2 and 3 Nm.
Fig. 14: Installation of a 8221 with PG13.5 connection onto a
direct welding holder
7.2.7. Installation of a 8221 with PG13.5
connection onto a G1¼" threaded
hygienic holder
• To avoid any mechanical damage to O-rings on assembly,
they should be lightly greased.
• After assembly, clean the probe of any remaining drops of grease.
1
2
3
→ Ensure there is no damage to the probe or the holder.
→ Check that all O-rings are in place in their appropriate grooves,
and are free of damage.
→ Make sure the holder 2 is mounted onto an adaptor 3 welded
onto the pipe.
→ Screw the probe 1 in the holder 2.
Fig. 15: Installation of a 8221 with PG13.5 connection onto a
holder with G1¼" connection
18
Installation
Type 8221
English
7.2.8. Installation of a 8221 with PG13.5
connection onto a hygienic holder
with clamp connection
• To avoid any mechanical damage to O-rings on assembly,
they should be lightly greased.
• After assembly, clean the probe of any remaining drops of grease.
1
2
→ Ensure there is no damage to the probe or the holder.
→ Check that all o-rings are in place in their appropriate grooves,
and are free of damage.
→ Make sure the holder 2 is fixed onto the clamp of the pipe.
→ Screw the probe 1 in the holder 2
Fig. 16: Installation of a 8221 with PG13.5 connection onto a
holder with clamp connection
8. WIRING
8.1. Wiring of the 8221 with 4
electrodes, with 1.5" clamp (short
and long) or G1¼" connections
Signal description
Cable
color
Bürkert device connected
Type 8285 Type 8619
Pt1000 (low end) grey 18 7 SE
Pt1000 white 19 8 TS
Pt1000 blue 17 9 TS
Current electrode (high
end)
pink 1 1 C+
Potential electrode (high
end)
green 2 2 P+
Potential electrode (low
end)
brown 3 3 P-
Current electrode (low
end)
yellow 4 4 C-
Not connected on probe shield 16 6 FE
Not connected red - -
Note: -
short 4 and
5
-
19
Wiring
Type 8221
English
8.2. Wiring of the 8221 with 4
electrodes, with 2" clamp or 2"
(DN50/40) connection, adapted
for GEA Tuchenhagen VARINLINE
process connections
Signal
description
VarioPin * Bürkert device connected
Pin
Cable
color
Type 8285 Type 8619
Pt1000 E white 17 9 TS
Pt1000 F green 18 7 SE
Current elec-
trode (high end)
B red 1 1 C+
Potential electrode (high end)
A
trans-
parent
2 2 P+
Potential electrode (low end)
C grey 3 3 P-
Current electrode (low end)
D blue 4 4 C-
Not connected
on probe
shield
green/
yellow
16 6 FE
Note: - -
short 18
and 19
short 7 SE
and 8 TS
*The cable colors are only valid for the Bürkert Vario Pin connection cables
with order code: 554855, 554856, 554857.
A
D
F
E
B
C
Fig. 17: View of the pin of the 8221 probe
20
Wiring
Type 8221
English
8.3. Wiring of the 8221 with 4
electrodes, with PG13.5
connection
Signal description
VarioPin *
Bürkert
type 8619
transmitter
Pin Cable color
Pt1000 E white 9 TS
Pt1000 F green 7 SE
Current electrode
(high end)
B red 1 C+
Potential electrode
(high end)
A transparent 2 P+
Potential electrode
(low end)
C grey 3 P-
Current electrode
(low end)
D blue 4 C-
Not connected on
probe
shield green/yellow 6 FE
Note: - -
short 7 SE and
8 TS
*The cable colors are only valid for the Bürkert Vario Pin connection cables
with order code: 554855, 554856, 554857.
8.4. Wiring of a 8221 with 2
electrodes
Signal description Cable color Bürkert type 8619
transmitter
Pt1000 red 9 TS
Pt1000 green 7 SE
Potential electrode (low
end)
white 3 P-
Potential electrode (high
end)
black 2 P+
Shield transparent 6 FE
Note: - short 7 SE and 8 TS
Note: - short 2 P+ et 1 C+
Note: - short 3 P- and 4 C-
21
Wiring
Type 8221
English
9. CALIBRATION
There are two possibilities for calibration:
• calibration while the probe is disassembled from process ;
• calibration in the process.
9.1. Calibration while the probe is
disassembled from process
→ Rinse the probe thoroughly with deionized water.
→ Use a beaker with an internal diameter of at least 60mm. (The
probe can be directly immersed into the Bürkert conductivity
standard calibration solutions).
→ Use a solution of known conductivity.
→ Check the temperature dependency.
→ Immerse the probe in the calibration solution. Make sure that the
4 electrodes are immersed. The probe should be placed in the
center of the beaker.
→ Leave the probe for at least 5 minutes for equilibration, before
initiating the calibration on the instrument.
For precise determination of the cell constant, it is recommended
that you use an assembly situation similar to the situation in the
process. The cell constant may vary according to the final mounting
position of the process.
9.2. Calibration in the process
→ Insert the probe in the process.
→ Leave conductivity and temperature at least 15 min. for
equilibration.
→ Take a process sample and perform an external measurement
with a reference conductivity system. The best approach is to
perform the measurement at a temperature equal to that of the
process. If that is not possible, you need to know the temperature coefficient of your sample.
→ Manually adjust the cell constant to read the same conductivity
value on the process instrument.
You may switch off the temperature compensation of
the process to prevent any errors. Refer to the operating
instructions of the device connected to the probe.
22
CALIBRATION
Type 8221
English
10. MAINTENANCE AND
TROUBLESHOOTING
10.1. Safety instructions
danger
Risk of injury 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.
Risk of injury due to electrical voltage.
• Shut down the electrical power source of all the conductors and
isolate it before carrying out work on the system.
• Observe all applicable accident protection and safety regulations for electrical equipment.
Risk of injury due to high fluid temperatures.
• Use safety gloves to handle the probe.
• Stop the circulation of fluid and drain the pipe before loosening
the process connections.
Risk of injury due to the nature of the fluid.
• Respect the prevailing regulations on accident prevention and
safety relating to the use of aggressive fluids.
Warning
Risk of injury due to non-conforming maintenance.
• Maintenance must only be carried out by qualified and skilled
staff with the appropriate tools.
• Ensure that the restart of the installation is controlled after any
interventions.
10.2. Maintenance of the probe
The probe can be cleaned with a cloth dampened with water or a
detergent compatible with the materials the probe is made of.
Please feel free to contact your Bürkert supplier for any additional
information.
Check the O-rings regularly.
23
Maintenance and troubleshooting
Type 8221
English
Loading...