Endress+Hauser CleanFit P CPA 472 User manual

BA 223C/07/en/03.00
No. 51502647 CleanFit P CPA 472
Retractable Assembly for
Measuring pH/Redox
Operating Instructions

CleanFit P CPA 472 Table of Contents
Endress+Hauser 1
Table of Contents
1Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Safety symbols . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Intended application . . . . . . . . . . . . . . . . . . . . 2
1.3 Installation, start-up and operation . . . . . . . . . 2
1.4 Operational safety . . . . . . . . . . . . . . . . . . . . . . 3
1.5 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Identification . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Equipment name . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Scope of supply . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Registered trademark . . . . . . . . . . . . . . . . . . . 6
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Measuring system . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Installation conditions . . . . . . . . . . . . . . . . . . . 8
3.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Starting up the assembly . . . . . . . . . . . . . . . . 17
4.2 Operating the CPA 472 in manual mode . . . . 17
4.3 CPA 472 in pneumatic mode . . . . . . . . . . . . . 18
5 Maintenance . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6 Accessories . . . . . . . . . . . . . . . . . . . . . . . 23
6.1 Connection accessories . . . . . . . . . . . . . . . . . 23
6.2 Electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.3 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.4 Control of retractable assembly during
cleaning / calibration . . . . . . . . . . . . . . . . . . . 24
7 Technical Data . . . . . . . . . . . . . . . . . . . 25

CleanFit P CPA 472 1 Safety
2Endress+Hauser
1Safety
1.1 Safety symbols
#Warnung!
This symbol alerts you to hazards which could cause serious injuries as well as
damage to the instrument if ignored.
"Achtung!
This symbol alerts you to possible faults which could arise from incorrect operation.
They could cause damage to the instrument if ignored.
!Hinweis!
This symbol indicates important items of information.
1.2 Intended application
The hand-operated or pneumatically operated retractable assembly CleanFit P CPA 472
is designed for installing pH/redox sensors in tanks and pipes.
Its mechanical design permits its use in pressurised systems (see Technical Data).
The responsibility for compliance with the following safety requirements lies with the
operator:
•Explosion protection regulations
•Installation instructions
•Operating instructions for the assembly and its materials
•Local prevailing standards and regulations
1.3 Installation, start-up and operation
#Warnung!
•Installation, electrical connection, start-up, operation and maintenance of the measu-
ring system must be carried out exclusively by trained specialists authorised by the
system operator.
•Technical personnel must be familiar with the instructions in this manual and must ad-
here to them.
•When the assembly is operated in explosive atmospheres, it is imperative to comply
with the regulations applicable.
•Before switching on the system check all the connections again for correctness.
•Do not operate damaged assemblies which could pose a danger, and mark them as
defective.
•Measuring point faults may only be repaired by authorised and trained personnel.
•If faults cannot be repaired, the assembly must be taken out of service and secured
against unintentional start-up.
•Repairs may only be carried out by the manufacturer or by the Endress+Hauser ser-
vice organisation.

CleanFit P CPA 472 1 Safety
Endress+Hauser 3
1.4 Operational safety
The CPA 472 assembly has been designed for safety according to the state of the art
and in compliance with the applicable regulations and EC directives (see Technical Da-
ta).
However, if it is used improperly or other than for its intended purpose, it may pose a
hazard, e.g. through incorrect installation or the wrong operating conditions.
#Warnung!
•If the device is used for any application other than those described in this manual, it
may lead to unsafe and improper functioning of the measuring system and is therefore
not permitted.
•Make sure you strictly adhere to the warnings and notes in these Operating Instruc-
tions.
Instructions for installation in pressurised systems
#Warnung!
•Do not exceed the maximum assembly operating pressure.
•Depressurise the system before installing or removing the assembly.
•Inspect screw unions, valves and pipes for leaks or damage on a regular basis.
1.5 Return
If the assembly has to be repaired, please return it cleaned to the Endress+Hauser sa-
les centre responsible. Please use the original packaging.

CleanFit P CPA 472 2 Identification
4Endress+Hauser
2 Identification
2.1 Equipment name
2.1.1 Nameplate
The assembly variant is recognisable
from the order code on the nameplate.
Abb. 2.1: Nameplate of CleanFit P CPA 472

CleanFit P CPA 472 2 Identification
Endress+Hauser 5
2.1.2 Product structure
Drive and limit switches
A Manual drive (not modifiable to pneumatic)
B Pneumatics without limit switch (retrofittable)
C Pneumatics with 2 pneumatic limit switches
Y Special design to customer specifications
Electrode holder seal
1 Standard version
9 Special design to customer specifications
Electrode type
A For gel electrodes with Pg 13.5 (gland)
B For KCl electrodes with Pg 13.5 (gland) hose connection head (only immersion depth 1)
Y Special design to customer specifications
Immersion depth
1 Short version up to 110 mm (dep. on process connection)
(possible electrode lengths: A = 120 mm, B = 225 mm)
2 Long version up to 215 mm (dep. on process connection)
(possible electrode length: A = 225 mm)
9 Special design to customer specifications
Assembly material (in contact with medium)
APP
BPEEK
CPVDF
D PVDF with PEEK electrode holder
Y Special design to customer specifications
Seal material
2VITON
®
3 KALREZ®
9 Special design to customer specifications
Process connection
AG 1¼external thread
B NPT 1" external thread
C Grooved nut Rd 78 DIN 11851-3 in stainless steel
D PP flange DN 50 (only immersion depth 2)
E PP flange ANSI 2" (only immersion depth 2)
Y Special design to customer specifications
Additional equipment
1 without rinse connection (not retrofittable)
3 With rinse connection 2 x G ¼internal thread
4 With rinse connection 2 x NPT ¼" internal thread
9 Special design to customer specifications
CPA 472- complete order code

CleanFit P CPA 472 2 Identification
6Endress+Hauser
2.2 Scope of supply
"Achtung!
•Make sure the packaging is undamaged! If any damage is found, contact your postal
service or forwarding agent. Keep any damaged packaging until matters have been
clarified.
•Make sure the contents are undamaged! If any damage is found, contact your postal
service or forwarding agent and inform the suppliers. Keep any damaged goods until
matters have been clarified.
•Inspect the delivery for completeness and quantity according to the delivery papers,
and the instrument type and version as shown on the nameplate.
The following items are included in the delivery:
•CleanFit P CPA 472 assembly
•Operating Instructions BA 223C/07/en
In case of any queries please contact your supplier or the Endress+Hauser sales centre
responsible (see back page of this Operating Instructionsmanual).
2.3 Registered trademark
KALREZ®
Registered trademark of E.I. Du Pont de Nemours & Co., Wilmington, USA.
Tradename for FFKM
VITON®
Registered trademark of E.I. Du Pont de Nemours & Co., Wilmington, USA.
Tradename for FKM

CleanFit P CPA 472 3 Installation
Endress+Hauser 7
3Installation
The following procedure should be followed for a complete measuring system installa-
tion:
1. Mounting and connecting an electrode (see Chapter 3.3.1)
2. Water connection to rinse connections (see Chapter 3.3.2)
3. Installing the assembly (see Chapter 3.3).
3.1 Measuring system
A full measuring system comprises:
•Retractable assembly CleanFit P CPA 472
•1 pH combination electrode (120 or 225 mm)
•pH/redox measuring transmitter, e.g. Mycom CPM 152, MyPro CPM 431,
Liquisys M CPM 223/253
•Measuring cable CPK 1, CPK 7 or CPK 9 (terminated)
Optional:
•Junction box VBA for measuring cable extension
•Measuring cable CYK 71 (unterminated) for measuring cable extension
•Cleaning device with injector CYR 10
Abb. 3.1: Complete measuring system for CPA 472 with Mycom CPM 152

CleanFit P CPA 472 3 Installation
8Endress+Hauser
3.2 Installation conditions
3.2.1 Dimensions
Abb. 3.2: (left): Dimensions of CPA 472, short version (for electrode length of 120 mm)
Abb. 3.3: (right): Dimensions of CPA 472, long version (for electrode length of 225 mm)

CleanFit P CPA 472 3 Installation
Endress+Hauser 9
Abb. 3.4: Dimensions of CPA 472, short version, with 225 mm liquid KCl electrode
CeraLiquid P CPS 41 (with hose connection for refilling with KCl)

CleanFit P CPA 472 3 Installation
10 Endress+Hauser
3.2.2 Installation location/position
The CPA 472 assembly is designed for installation on tanks or pipes. Suitable connections must
be available.
!Hinweis!
It is imperative to maintain an installation angle of min. 15°.
Abb. 3.5: Installation examples: The minimum installation angle is 15° to the horizontal.
!Hinweis!
•The assembly requires a minimum nominal width of DN 80 for installation in a pipe.
•For thinner pipes please use a flow vessel. These are available as accessories (DN 25, PVDF
or DN 50, PP; for Order Numbers, see Accessories section).
Abb. 3.6: Flow vessel for CPA 472
left: DN 25, PVDF
right: DN 50, PP
"Achtung!
Risk of frost damage!
If there is a risk of temperatures dropping below 0°C, the assembly and any air or water tubes
must be heated.

CleanFit P CPA 472 3 Installation
Endress+Hauser 11
3.3 Installation
Abb. 3.7: Overview of mounting parts of CPA 472
3.3.1 Installing the electrode
!Hinweis!
•Before installing a new electrode, make sure that the electrode shaft is fitted with O-
ring B and thrust collar A and that the protection cap is removed.
•Moisten the electrode shaft before installing the electrode. Simply immerse in water.

CleanFit P CPA 472 3 Installation
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Gel electrode
1. Pull lifting tube completely into
assembly (in »Maintenance«position,
see Fig. 3.7)
2. Turn stop bolt lock through 90°so that
plastic grooves are located above the
recesses.
3. Turn lifting tube clockwise until stop
bolt lock engages.
4. Remove splash protection cap from
assembly.
5. Now you can remove the lifting tube by
turning anticlockwise.
6. Insert electrode hand-tight in electro-
de holder that is now visible and tigh-
ten by ¼turn using socket spanner
(WAF17).
7. Insert measuring cable from top th-
rough handle and lifting tube.
8. Screw measuring cable on electrode
plug-in head and tighten hand-tight.
9. Screw lifting tube hand-tight back on
assembly.
10.Place measuring cable in splash pro-
tection tube and insert on protective
tube.
11.Release stop bolt locks catch: Remove
stop bolt lock and turn through 90°.
Remove electrode in the reverse se-
quence of operations.
Abb. 3.8: top:Turn stop bolt lock through 90°so
that plastic grooves are located above
the recesses.
bottom:When turning lifting tubes, stop
bolt lock engages.
Abb. 3.9: Leadthrough of cables at connection
on CPS 11/12

CleanFit P CPA 472 3 Installation
Endress+Hauser 13
KCl electrode
1. Pull lifting tube fully into assembly (in
»Maintenance«position, see Fig. 3.7)
2. Turn stop bolt lock through 90°so that
plastic grooves are located above the
recesses.
3. Turn lifting tube clockwise until stop
bolt lock engages.
4. Remove splash protection cap
5. Now you can remove the lifting tube by
turning anticlockwise.
6. Slacken and remove tension sleeve.
7. Remove electrode tube from lifting tu-
be.
8. Insert electrode in electrode tube (➀),
screw it in and tighten with socket
spanner (WAF17) by ¼turn (➁).
9. Insert electrode and electrode tube in
lifting tube.
10.Insert tension sleeve from bottom in lif-
ting tube (➂) and screw to electrode
tube (➃).
11.Screw lifting tube and electrode hand-
tight on assembly.
12.Insert measuring cable from top th-
rough protective tube and KCl hood.
13.Screw measuring cable on electrode
plug-in head and tighten hand-tight.
14.Insert electrolyte supply tube through
KCl hood and connect to electrode
electrolyte connection.
15.Place measuring cable and electrolyte
supply tube in splash protection cap
and place this assembly on protection
tube.
16.Release stop bolt lock: Remove stop
bolt lock and turn through 90°.
Remove electrode in the reverse se-
quence of operations.
Abb. 3.10: Installing the liquid KCl electrode in the
lifting tube
Abb. 3.11: Connections on CPS 41 electrode

CleanFit P CPA 472 3 Installation
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3.3.2 Water connection
(only on version with rinse connection)
Connect the water supply to the rinse connections with internal thread provided
(see Fig. 3.7). One connection is for the water inlet, the other is the water outlet. Make
sure that the discharge is free and pressureless.
The CPA 472 assembly is operated at a water pressure of 2 to 6 bar. A dirt trap and a
non-return valve should be installed in the water supply line.
!Hinweis!
•If the water pressure can rise above 6 bar (including any transient pressure surges),
install a pressure reducing valve upstream, otherwise the assembly may be
damaged.
•The outlet should be located above the inlet as far as possible so that the electrode
does not run dry in the rinse chamber.
Besides water, other or additional cleaning solutions may be used in the rinse chamber.
However, pay attention to the material resistance of the assembly and comply with the
maximum permitted temperatures (see Technical Data).
3.3.3 Compressed air connection to assembly control
(only when equipped accordingly)
Abb. 3.12: Compressed air connections for CPA 472
•Connect compressed air line for »Measurement«to upper ¼" screw union.
•Connect compressed air line for »Maintenance«to lower ¼" screw union.
The CPA 472 assembly is operated at an air pressure of 4 to 8 bar.
The air must be filtered (40 µm), and be water- and oil-free.
There is no continuous air consumption.
!Hinweis!
If the air pressure can rise above 8 bar (including any transient pressure surges), install
a pressure reducing valve upstream, otherwise the assembly may be damaged.

CleanFit P CPA 472 3 Installation
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3.3.4 Connecting the pneumatic limit switch
(only when equipped accordingly)
Abb. 3.13: Pneumatic limit switch (1 = input, 2= output)
The lower limit switches are for the »Measurement«function and the upper switches for
the »Maintenance«function.
The air lines must have a minimum nominal width of DN 4 mm.
Connect the pneumatic limit switches to the compressed air lines to the assembly con-
trol (see Chapter 3.3.3) as follows:
Abb. 3.14: Connection of the pneumatic lines to the CPA 471 assembly
1 = input, 2 = output
Connect the compressed air lines for the »Measurement«position feedback signal to
the lower limit switch at the connections marked 1 (= inlet) and 2 (= outlet). When the
»Measurement«position is reached, the air applied to inlet 1 is switched through and
can be tapped at connection 2.
Connect the compressed air lines for the »Maintenance«position feedback signal to the
upper limit switch at the connections marked 1 and 2. When the »Maintenance«position
is reached, the air applied to inlet 1 is switched through and can be tapped at connec-
tion 2.

CleanFit P CPA 472 3 Installation
16 Endress+Hauser
3.3.5 Installing the assembly
Set the assembly in maintenance position (see Fig. 3.7) and attach it to the selected
connection on the tank or pipe.
Process connections are available for the CPA 472 assembly:
G 1¼external thread, Tri-Clamp 2", flange DN 50, flange ANSI 2", NPT 1" external
thread, grooved nut Rd 78
Abb. 3.15: Existing process connections for the CleanFit P CPA 472 assembly
The immersion depth is specified in each case (long assembly version in brackets)
!Hinweis!
Note the following depending on the process connection fitted:
All connections:
•Check the correct seating of the O-rings on the assembly.
Abb. 3.16: O-ring seals of the CPA 472 (in contact with medium)
Flange connection:
Check the seat of the flange seal between the flanges.

CleanFit P CPA 472 4 Operation
Endress+Hauser 17
4Operation
The assembly stop bolt lock arrests the lifting tube. Its operation is described in the two
figures below:
Abb. 4.1: Release stop bolt lock:
Remove stop bolt and turn through 90°so that the plastic grooves rest on the metal edge.
Abb. 4.2: Arrest stop bolt lock:
left: Turn stop bolt lock through 90°so that the plastic grooves are located above the recesses
right: When you turn the lifting tube clockwise, the stop bolt lock engages.
4.1 Starting up the assembly
!Hinweis!
Before the first start-up, make sure of the following points:
•All seats are correctly seated (on the assembly and process connection)
•Electrode is correctly installed and connected
•Water supply line is correctly connected to the rinse connections (if fitted)
•Limit switches (depending on equipment fitted) are correctly connected
Caution!
Before applying compressed air to the pneumatic assembly, make sure the connec-
tion is correctly fitted!
4.2 Operating the CPA 472 in manual mode
»Measurement« process
•Release stop bolt lock catch.
•Introduce electrode and lifting tube completely in process.
•In this position, arrest electrode holder with stop bolt lock to prevent lifting
tube from retracting unintentionally.
#Warnung!
Risk of injury! If the lifting tube is not arrested in the measurement position, the process
pressure may exit uncontrolled and endanger the operator.

CleanFit P CPA 472 4Operation
18 Endress+Hauser
»Maintenance«process
•Release stop bolt lock catch.
•Pull lifting tube completely into assembly (in »Maintenance«position, see Fig. 3.7)
•Arrest electrode holder in this position with the stop bolt lock.
•Carry out maintenance work (see Chapter 5)
4.3 CPA 472 in pneumatic mode
Operating the pneumatic version depends on the control fitted. Refer to the control ope-
rating manual for instructions.
It is not possible to lock pneumatic assembly in »Measurement«position. The pneu-
matic system maintains the back-pressure to the process pressure.
"Achtung!
•During maintenance work (e.g. installing and removing electrode), lock the assembly
in maintenance position using the stop bolt lock.
•During the automatic rinse process, do not arrest the lifting tube with the stop bolt lock,
otherwise the assembly can no longer move automatically to the measurement
position.
•If a maintenance switch is fitted on the measuring transmitter, set it to »Maintenance«
or »Service«.