Endress+Hauser CleanFit P CPA 471 User manual

BA 217C/07/en/03.00
No. 51502594 CleanFit P CPA 471
Retractable Assembly for
Measuring pH/Redox
Operating Instructions

CleanFit P CPA 471 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 . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Identification . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Equipment name . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Scope of supply . . . . . . . . . . . . . . . . . . . . . . . . 5
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 471 in manual mode . . . . 18
4.3 CPA 471 in pneumatic mode . . . . . . . . . . . . . 18
5 Maintenance . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 Accessories . . . . . . . . . . . . . . . . . . . . . . . 22
6.1 Connection accessories . . . . . . . . . . . . . . . . . 22
6.2 Electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.3 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.4 Control of retractable assembly during
cleaning / calibration . . . . . . . . . . . . . . . . . . . 23
7 Technical Data . . . . . . . . . . . . . . . . . . . 24
Index 26

1 Safety CleanFit P CPA 471
2Endress+Hauser
1Safety
1.1 Safety symbols
#Warning!
This symbol alerts you to hazards which could cause serious injuries as well as damage
to the instrument if ignored.
"Caution!
This symbol alerts you to possible faults which could arise from incorrect operation.
They could cause damage to the instrument if ignored.
!Note!
This symbol indicates important items of information.
1.2 Intended application
The hand-operated or pneumatically operated retractable assembly CleanFit P CPA 471
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 lines 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
#Warning!
•Installation, electrical connection, start-up, operation and maintenance of the
measuring instrument 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
adhere 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
service organisation.

CleanFit P CPA 471 1 Safety
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1.4 Operational safety
The assembly CPA 471 has been designed for safety according to the state of the art
and in compliance with the applicable regulations and EC directives (see Technical
Data).
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.
#Warning!
•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
Instructions.
Instructions for installation in pressurised systems
#Warning!
•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
sales centre responsible. Please use the original packaging.

2 Identification CleanFit P CPA 471
4Endress+Hauser
2 Identification
2.1 Equipment name
2.1.1 Nameplate
The assembly variant is recognisable
from the order code on the nameplate.
Fig. 2.1: Nameplate of CleanFit P CPA 471

CleanFit P CPA 471 2 Identification
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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 (only process connection A, B, G, H)
2 Sterilisable version (only immersion depth 1, process connection A, C, D
additional equipment with rinse fittings 3, 4)
9 Special design to customer specifications
Electrode holder
A For gel electrodes with Pg 13.5 (gland)
B For KCl electrodes with Pg 13.5 (gland) (only immersion depth 1)
Y Special design to customer specifications
Immersion depth
1 Short version up to 101 mm (dependent on process connection)
(possible electrode lengths: A = 120 mm, B = 225 mm)
2 Long version up to 208 mm (dependent on process connection)
(possible electrode length: A = 225 mm)
9 Special design to customer specifications
Assembly material (in contact with medium)
A In contact with medium SS 316L with PA housing
B In contact with medium SS 316L with housing SS 316Ti
C In contact with medium SS 316L with test certificate 3.1B acc. to EN10204 with
housing PA
D In contact with medium SS 316L with test certificate 3.1B acc. to EN10204
with housing SS 316Ti
Y Special design to customer specifications
Seal material (in contact with medium)
1EPDM
2VITON
®
3 KALREZ®
9 Special design to customer specifications
Process connection
AG 1¼internal thread (thread adapter nut)
B NPT 1" external thread
C Tri-Clamp 2"
D Sanitary tube DN 50
G Flange DN 50 (only immersion depth 2)
H Flange ANSI 2" (only immersion depth 2)
Y Special design to customer specifications
Additional equipment
1 Without rinse fitting (not retrofittable)
3 With rinse fittings 2 x G ¼internal thread
4 With rinse fittings 2 x NPT ¼" internal thread
9 Special design to customer specifications
CPA 471- Complete order code

2 Identification CleanFit P CPA 471
6Endress+Hauser
2.2 Scope of supply
"Caution!
•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 471 assembly
•Operating Instructions BA 217C/07/en
In case of any queries, please contact your supplier or the Endress+Hauser sales
centre responsible (see back page of these Operating Instructions).
2.3 Registered trademark
KALREZ®
Registered trade mark of E.I. Du Pont de Nemours & Co., Wilmington, USA.
Tradename for FFKM
VITON®
Registered trade mark of E.I. Du Pont de Nemours & Co., Wilmington, USA.
Tradename for FKM
TRI-CLAMP®
Registered trade mark of Ladish & Co., Inc., Kenosha, USA

CleanFit P CPA 471 3 Installation
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3Installation
The following procedure should be followed for a complete measuring system
installation:
1. Mounting and connecting an electrode (see Chapter 3.3.1)
2. Water connection to the rinse fittings (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 471
•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
Fig. 3.1: Complete measuring system for CPA 471 with Mycom CPM 152

3 Installation CleanFit P CPA 471
8Endress+Hauser
3.2 Installation conditions
3.2.1 Dimensions
Fig. 3.2: (left): Dimensions of CPA 471, short version (for electrode length of 120 mm)
Fig. 3.3: (right): Dimensions of CPA 471, long version (for electrode length of 225 mm)

CleanFit P CPA 471 3 Installation
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Fig. 3.4: Dimensions of electrode holder in sterile version
Fig. 3.5: Dimensions of CPA 471, short version, with 225 mm liquid KCl electrode
CeraLiquid P CPS 41 (with hose connection for refilling with KCl)

3 Installation CleanFit P CPA 471
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3.2.2 Installation location/position
The CPA 471 assembly is designed for installation on tanks or pipes. Suitable
connections must be available.
!Note!
It is imperative to maintain an installation angle of min. 15°.
Fig. 3.6: Installation examples: The minimum installation angle is 15° to the horizontal.
!Note!
•The assembly requires a minimum nominal width of DN 80 for installation in a pipe.
•For thinner pipes please use a flow vessel. This is available as an accessory (DN 25,
stainless steel SS 316L; Order No., see Accessories section).
Fig. 3.7: Flow vessel for CPA 471; DN 25, stainless steel 316L
"Caution!
Risk of frost damage!
If there is a risk of temperatures below 0°C, the assembly and any air or water tubes must be
heated.

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3.3 Installation
Fig. 3.8: Overview of mounting parts of CPA 471
3.3.1 Installing the electrode
!Note!
•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.

3 Installation CleanFit P CPA 471
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Gel electrode
1. Pull lifting tube fully into assembly
(in »Maintenance«position,
see Fig. 3.8).
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 remove lifting tube by turning
anticlockwise.
6. Insert electrode hand-tight in
electrode holder that is now visible
and tighten by ¼turn using socket
spanner (WAF17).
7. Insert measuring cable from top
through 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
protection tube and insert on
protective tube.
11.Push PM connector on PM connection
(PM = Potential Matching Line).
12.Release stop bolt lock catch: Remove
stop bolt lock and turn through 90°.
Remove electrode in the reverse
sequence of operations.
Fig. 3.9: top:Turn stop bolt lock through 90° so
that plastic grooves are located above
recesses.
bottom:When turning lifting tube, stop
bolt lock engages.
Fig. 3.10: PM connector on
CPS 11/12

CleanFit P CPA 471 3 Installation
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KCl electrode
1. Pull lifting tube fully into assembly (in
»Maintenance«position, see Fig. 3.8)
2. Turn stop bolt lock through 90°so that
plastic grooves are located above
recesses.
3. Turn lifting tube clockwise until stop
bolt lock engages.
4. Remove splash protection cap.
5. Then slacken lifting tube by turning
anticlockwise. Unscrew tension
sleeve.
6. Remove electrode tube from lifting
tube.
7. Insert electrode in electrode tube (➀),
screw it in and tighten with socket
spanner (WAF17) by ¼turn (➁).
8. Insert electrode and electrode tube in
lifting tube.
9. Insert tension sleeve from bottom in
lifting tube (➂) and screw to electrode
tube (➃).
10.Screw lifting tube and electrode hand-
tight on assembly.
11.Insert measuring cable from top
through protective tube and KCl hood.
12.Screw measuring cable on electrode
plug-in head and tighten hand-tight.
13.Push PM connector on PM connection.
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 catch: Remove
stop bolt lock and turn through 90°.
Remove electrode in the reverse
sequence of operations.
Fig. 3.11: Installing the liquid KCl electrode in the
lifting tube
Fig. 3.12: Connection on CPS 41 electrode

3 Installation CleanFit P CPA 471
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3.3.2 Water connection
(only on version with rinse fitting)
Connect the water supply to the rinse fittings with internal thread provided (see Fig. 3.8).
One connection is for the water inlet, the other is the water outlet. Make sure that the
discharge is free and pressureless.
The CPA 471 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.
!Note!
•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)
Fig. 3.13: Compressed air connections for CPA 471
•Connect the compressed air supply line for »Measurement«to the upper ¼" screw
union.
•Connect the compressed air supply line for »Maintenance«to the lower ¼" screw
union.
The CPA 471 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.
!Note!
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 471 3 Installation
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3.3.4 Connecting the pneumatic limit switches
(only when equipped accordingly)
Fig. 3.14: 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 on the assembly
control (see Chapter 3.3.3) as follows:
Fig. 3.15: 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
connection 2.

3 Installation CleanFit P CPA 471
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3.3.5 Installing the assembly
Set the assembly in maintenance position (see Fig. 3.8) and attach it with the selected
connection to the tank or pipe.
Process connections are available for the CPA 471 assembly:
G 1¼thread adapter nut internal thread, Tri-Clamp 2", flange DN 50, flange ANSI 2",
sanitary tube union (DIN 11851), NPT 1" external thread
Fig. 3.16: Existing process connections for the CPA 471 assembly
The immersion depth is specified in each case (long assembly version in brackets)
!Note!
Note the following depending on the process connection fitted:
All connections:
•Check the correct seating of the O-rings on the assembly.
Fig. 3.17: O-ring seals of the CPA 471 (in contact with medium)
left: Electrode holder, standard
right: Electrode holder, sterile version
:
Check the seat of the flange seal between the flanges.
G 1¼ thread adapter nut:
This thread adapter nut does not function as a seal. Therefore, only tighten it hand-tight.

CleanFit P CPA 471 4 Operation
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4Operation
The assembly stop bolt lock arrests the lifting tube. Its operation is described in the two
figures below:
Fig. 4.1: Release stop bolt lock:
Remove stop bolt and turn through 90° so that the plastic grooves rest on the metal edge.
Fig. 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
!Note!
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 fittings (if fitted)
•Limit switches (depending on equipment fitted) are correctly connected
Warning!
Before applying compressed air to the pneumatic assembly, make sure the
connection is correctly fitted!

4 Operation CleanFit P CPA 471
18 Endress+Hauser
4.2 Operating the CPA 471 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.
#Warning!
Risk of injury! If the lifting tube is not arrested in the measurement position, the process
pressure may exit uncontrolled and endanger the operator.
»Maintenance«process
•Release stop bolt lock catch.
•Pull lifting tube completely in assembly (»Maintenance«position, see Fig. 3.8)
•Arrest electrode holder in this position with the stop bolt lock.
•Carry out maintenance work (see Chapter 5)
4.3 CPA 471 in pneumatic mode
Operating the pneumatic version depends on the control fitted. Refer to the control
operating manual for instructions.
It is not possible to lock pneumatic assembly in »Measurement«position. The
pneumatic system maintains the back-pressure to the process pressure.
"Caution!
•During maintenance work (e.g. installing and removing electrode), lock the assembly
in maintenance position using the stop bolt lock.
•During the automatic rinsing 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«.