Endress+Hauser Cleanfit H CPA475 User manual

BA240C/07/en/05.05
51517656
Operating Instructions
Cleanfit H CPA475
Retractable Process Assembly

Endress+Hauser
Brief overview
Here is how to use these Operating Instructions to commission your assembly quickly and safely:
Safety instructions
Page 4 ff.
Page 5
General safety instructions
Explanation of the warning symbols
You can find special instructions at the appropriate position in chapter in question. The
significance is indicated with the icons Warning #, Caution "and Note !.
▼
Installation
Page 8 ff.
Page 14 ff.
Page 17 ff.
Here you can find installation conditions such as the dimensions of the assembly.
Refer to these pages to connect compressed air hoses, limit position switches and rinse water
lines.
Here you can find how to install a sensor in the assembly.
▼
Operation
Page 20
Page 21
In this chapter, you can find how to move a manually driven assembly from "Measuring" position
to "Service" position and vice versa.
Here you can read about the function of a pneumatically driven assembly.
▼
Maintenance
Page 22 ff.
Page 28 ff.
Page 24 ff.
Page 30 ff.
For normal operation of the assembly, it is absolutely essential to carry out maintenance tasks on
a regular basis, such as sensor or assembly cleaning.
Individual parts are subject to normal wear and tear. Here you can find out how to replace such
parts.
On the given pages you can find the accessories for the assembly.
Here you can find an overview of the spare parts which can be delivered as well as an overview
of the assembly parts.
▼
Technical data
Page 11 ff.
Page 34 ff.
Dimensions
Environment and process, weight, materials etc.
▼
▼
Index
Page 36 ff. You can find important terms and keywords on the individual sections here. Use the keyword
index to find the information you need quickly and efficiently.

Cleanfit H CPA475
Endress+Hauser 3
Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . 4
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Installation, commissioning and operation . . . . . . . . 4
1.3 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Notes on safety icons and symbols . . . . . . . . . . . . . . 5
2 Identification . . . . . . . . . . . . . . . . . . . . 6
2.1 Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Certificates and approvals . . . . . . . . . . . . . . . . . . . . 6
2.4 Product structure . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Installation . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Incoming acceptance, transport, storage . . . . . . . . . . 8
3.2 Installation conditions . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Installation instructions . . . . . . . . . . . . . . . . . . . . . 13
3.4 Post-installation check . . . . . . . . . . . . . . . . . . . . . . 19
4 Operation . . . . . . . . . . . . . . . . . . . . . . 20
4.1 First commissioning . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2 Operating elements . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3 Manual operation . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.4 Pneumatic operation . . . . . . . . . . . . . . . . . . . . . . . 21
5 Maintenance. . . . . . . . . . . . . . . . . . . . 22
5.1 Cleaning the assembly . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Cleaning the sensor . . . . . . . . . . . . . . . . . . . . . . . . 22
5.3 Cleaning agents . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.4 Notes on calibration . . . . . . . . . . . . . . . . . . . . . . . 23
6 Accessories. . . . . . . . . . . . . . . . . . . . . 24
6.1 Installation accessories . . . . . . . . . . . . . . . . . . . . . . 24
6.2 Limit position switches . . . . . . . . . . . . . . . . . . . . . 25
6.3 Pneumatic throttle . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.5 Calibration solutions . . . . . . . . . . . . . . . . . . . . . . . 26
6.6 Measuring cables . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.7 Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.8 Measuring, cleaning and calibration systems . . . . . 27
7 Trouble-shooting . . . . . . . . . . . . . . . . 28
7.1 Replacing damaged parts . . . . . . . . . . . . . . . . . . . . 28
7.2 Replacing seals . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.3 Spare part kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.5 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8 Technical data . . . . . . . . . . . . . . . . . . . 34
8.1 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.3 Mechanical construction . . . . . . . . . . . . . . . . . . . . 35
Index . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Safety instructions Cleanfit H CPA475
4Endress+Hauser
1 Safety instructions
1.1 Designated use
The manually or pneumatically operated retractable assembly Cleanfit H CPA475 is designed for
installing pH/redox sensors in tanks and pipes under sterile conditions.
Its mechanical design permits its use in pressurised systems (see "Technical data").
Any other use than the one described here compromises the safety of persons and the entire
measuring system and is, therefore, not permitted.
The manufacturer is not liable for damage caused by improper or non-designated use.
1.2 Installation, commissioning and operation
Please note the following items:
• Installation, commissioning, operation and maintenance of the measuring system must only be
carried out by trained technical personnel.
The technical personnel must be authorised for the specified activities by the system operator.
• Electrical connection must only be carried out by a certified electrician.
• Technical personnel must have read and understood these Operating Instructions and must
adhere to them.
• Before commissioning the entire measuring point, check all the connections for
correctness. Ensure that electrical cables and hose connections are not damaged.
• Do not operate damaged products and secure them against unintentional
commissioning. Mark the damaged product as being defective.
• Measuring point faults may only be rectified by authorised and specially trained
personnel.
• If faults can not be rectified, the products must be taken out of service and secured against
unintentional commissioning.
• Repairs not described in these Operating Instructions may only be carried out at the
manufacturer’s or by the service organisation.
1.3 Operational safety
The assembly has been designed and tested according to the state of the art and left the factory in
perfect functioning order.
Relevant regulations and European standards have been met.
As the user, you are responsible for complying with the following safety conditions:
• Installation instructions
• Local prevailing standards and regulations.
1.4 Return
If the assembly has to be repaired, please return it cleaned to the sales centre responsible.
Please use the original packaging, if possible.
Please enclose the completed "Declaration of contamination" (copy the second last page of these
Operating Instructions) with the packaging and the transportation documents.
No repair without completed "Declaration of contamination"!

Cleanfit H CPA475 Safety instructions
Endress+Hauser 5
1.5 Notes on safety icons and symbols
#Warning!
This symbol alerts you to hazards. They can cause serious damage to the instrument or to persons
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.

Identification Cleanfit H CPA475
6Endress+Hauser
2 Identification
2.1 Nameplate
You can identify the assembly version by the order code on the nameplate. Please compare this code
with your order.
You can find possible assembly versions and the resulting order codes in the product structure.
2.2 Scope of delivery
The scope of delivery comprises:
• Cleanfit assembly (ordered version)
• Operating Instructions (English).
If you have any questions, please contact your supplier or your sales center responsible.
2.3 Certificates and approvals
2.3.1 3A
Following versions meet the requirements of the rule 3A 74-:
• CPA475-XXXXXXCX (process connection: triclamp)
• CPA475-XXXXXXDX (process connection: dairy fitting)
• CPA475-XXXXXXEX (process connection: varivent)
• CPA475-XXXXXXFX (process connection: APV)
2.3.2 Sterilizability
TNO report V3641:
"The retractable assembly for pH measurement Cleanfit H CPA475 – including the seals – is
classified as in-line steam sterilizable by a 30 minute saturated steam treatment at a temperature of
120 °C." 1
a0003997
Abb. 1: Example of a nameplate
1) acc. to the test method of the European Hygienic Equipment Design Group (EHEDG)
CLEANFIT H CPA475
spec.:
pressure: PN=10bar T=100°C
order code: CPA475-C1A1B2H4
serial no.: 5 13719 07B11

Cleanfit H CPA475 Identification
Endress+Hauser 7
2.4 Product structure
Drive type and limit contact switches
A Manual (cannot be converted to pneumatic)
B Pneumatic without limit contact switches (suitable for retrofitting)
C Pneumatic with 2 pneumatic limit contact switches
D Pneumatic with 2 electric limit contact switches (max. 90 °C / 194 °F)
E Pneumatic with 2 electric Ex limit contact switches (max. 90 °C / 194 °F)
Assembly version
1 Standard version
Electrode holder
A For 120 mm gel electrodes / ISFET sensors with Pg 13.5
B For 225 mm liquid KCl electrodes / ISFET sensors with Pg 13.5 hose connection head
Immersion depth / maximum stroke
1 Immersion depth / stroke: 101/65 mm resp. 48/23 mm (depending on process connection)
9 Special version acc. to customer
Assembly material (in contact with medium)
A 1.4435 (AISI 316L) in contact with medium, with PA housing (max. 6 bar/87 psi at 20 °C/68 °F or
max. 80 °C/176 °F at 1 bar/14.5 psi)
B 1.4435 (AISI 316L) in contact with medium, with stainless steel 1.4404 (AISI 316L) housing (max.
10 bar / 145 psi at 100 °C / 212 °F)
C 1.4435 (AISI 316L) in contact w. medium, with test cert. 3.1B acc. to EN10204, with PA housing
D 1.4435 (AISI 316L) in contact w. medium, with test certificate 3.1B acc. to EN10204,
with 1.4571 (AISI 316Ti) housing
Seal material (in contact with medium)
1 EPDM (preferred for food application)
2FPM(Viton
®, preferred for process application)
Process connection
A G 1¼ internal thread (union)
CTri-Clamp2"
D Dairy fitting DN 50 (acc to. DIN 11 851) ***only permissible with SKS Siersma adapter
E Varivent N, 68 mm, for pipe lines DN 50 ... 125 and tank connection
F APV DN 50 ... 100
G DN 50 flange (acc. to EN 1092-1)
H2"ANSIflange
Optional equipment
3 With rinse fitting 2 x G ¼ internal thread
4 With rinse fitting 2 x NPT ¼" internal thread
CPA475- complete order code

Installation Cleanfit H CPA475
8Endress+Hauser
3 Installation
3.1 Incoming acceptance, transport, storage
• Make sure the packaging is undamaged!
Inform the supplier about damage to the packaging.
Keep the damaged packaging until the matter has been settled.
• Make sure the contents are undamaged!
Inform the supplier about damage to the delivery contents.
Keep the damaged products until the matter has been settled.
• Check that the scope of delivery is complete and agrees with your order and the
shipping documents.
• The packaging material used to store or to transport the product must provide shock protection
and humidity protection. The original packaging offers the best protection. Also, keep to the
approved ambient conditions (see "Technical data").
• If you have any questions, please contact your supplier or your sales center responsible.
3.2 Installation conditions
3.2.1 Notes on installation
!Note!
For the installation of the assembly use only materials complying with the standard of 3A 74-!
The assembly is designed for installation on tanks and pipes. Suitable nozzles must be available for
this.
When using standard glass electrodes, only installation positions are permitted in which the middle
axis of the assembly lies at an angle between 15° and 75° from the horizontal (see diagram).
Otherwise, there will not be a reliable contact between the inner side of the pH membrane and the
inner terminal leads via the electrolytes.
If the angle of the installation position is above 75° from the horizontal, air bubbles can accumulate
in the chamber.
a0003998
Fig. 2: Installation angle
A Inadmissible installation angle
B Limited permissible angle (air bubbles can build up in the chamber)
C Recommended installation angle
90°
75°
15°
0°
0°
15°
75°
A
A
B
C
C

Cleanfit H CPA475 Installation
Endress+Hauser 9
When using an ISFET Tophit sensor, there are, in principle, no restrictions for the installation
position. An installation angle of 0 to 75° is, however, recommended. An overhead installation is
possible.
a0004003
Abb. 3: Installation angle for assemblies with ISFET sensors
B Limited permissible angle (air bubbles can build up in the chamber)
C Recommended installation angle
C07-CPA471xx-17-07-00-xx-002.eps
Fig. 4: Installation examples with recommended installation angle (glass electrodes)
ATank
BPipebend
C Horizontal pipe
D Ascending pipe
90°
75°
0°
0°
75°
B
C
C
> 15 °
> 15 °
> 15 °
> 15 °
AB
CD

Installation Cleanfit H CPA475
10 Endress+Hauser
"Caution!
• For all assemblies with stainless steel pressure cylinders, we recommend to use a flanged version
when installing with inclined orientation. Otherwise, the weight of the assembly could affect the
safety of the process connection.
• Avoid a siphon effect1at the rinse chamber outlet when installing with inclined orientation. The
inlet to the rinse chamber must be from below.
!Note!
• The minimum diameter for direct installation in pipework is DN 50. This diameter is required so
that the assembly has sufficient distance from the pipe wall when brought into the "Measuring"
position.
• Use a flow assembly to install the assembly in smaller pipe diameters (see Accessories).
• When designing the installation nozzle, please observe the total immersion depth in operation
(sensor holder not inserted). Ensure that the sensor is always immersed in the medium during
operation (see "Dimensions").
1) Siphon effect: line emptied by vacuum

Cleanfit H CPA475 Installation
Endress+Hauser 11
3.2.2 Dimensions
C07-CPA475xx-06-07-00-en-002.eps
Fig. 5: Varivent version
C07-CPA475xx-06-07-00-en-001.eps
Fig. 6: Liquid KCl electrolyte
version
C07-CPA475xx-06-07-00-en-006.eps
Fig. 7: G1¼ thread nut version
Stroke 57 / 2.24
84/3.31
Ø 19/0.75
29 /
1.14
48/1.89
Ø 80/3.15
Ø 58 / 2.28
191 / 7.52
167 / 6.57
mm / inch
84/3.31
29 /
1.14
ø 19/0.75
526 / 20.71
Stroke 57 / 2.24
160 / 6.30
80 / 3.15
48/1.89
mm/inch
Stroke 67 / 2.64
192 / 7.56
102 / 4.02
G 1¼
Ø 25/0.98
Ø 19/0.75
35/1.38
Ø 58 / 2.28
125 / 4.92
44/1.73
Ø80/3.15
mm / inch

Installation Cleanfit H CPA475
12 Endress+Hauser
3.2.3 Process connections
C07-CPA475xx-04-07-07-en-001.eps
Fig. 8: Process connections
A
C
D
G1 ¼ internal thread with thread nut
Triclamp 2"
DN 50 dairy fitting
E
F
G/H
Varivent DN 50 ... 125
APV DN 50 ... 100
DN 50 flange (DIN 1092-1) resp. ANSI 2" flange
C
G, H
D
EF
A
29/1.14
44 / 1.73
102 / 4.02
48/1.89
29/1.14
48/1.89
29/1.14
48/1.89
29/1.14
48/1.89
29/1.14
48/1.89
mm / inch

Cleanfit H CPA475 Installation
Endress+Hauser 13
3.3 Installation instructions
3.3.1 Measuring system
C07-CPA471xx-04-07-03-xx-001
Fig. 9: Fully automatic measuring system (example)
A, B For information on function and connection of the pneumatic resp. electric limit position switches to the assembly,
please refer to the related chapters.
1
4
9
Assembly
Special measuring cable, e.g. CPK9, CPK12
Rinse block CPR40 (optionally)
a
b
c
Electric line
Compressed air line
Water / cleaning agent / buffer
Topcal S CPC300:1
1) Fully automatic calibration and cleaning system
Supply lines:
2
3
5
6
7
8
Transmitter Mycom S CPM153
Control unit CPG300
Supply / control cable
Multi hose
Vessels for cleaning agents + buffer solutions
Hoses of cleaning agents and buffers
10
11
12
13
14
Power supply for Mycom S CPM153
Power supply for CPG300
Compressed air
Water supply
Steam / water / cleaning agent (optionally)
A
B
MYCOMS CPM 153
MYCOMS CPM 153
ENDRESS+HAUSER
ENDRESS+HAUSER
MEAS CAL
DIAG PARAM
PARAM
?
Messen Hold
Aus
Wahl
pH 7.00
ATC
Temperatur25.0°C
Endress+Hauser
CPG 300
12
3
8
10
11
12
13
5
14
6
7
9
a
b
c
4

Installation Cleanfit H CPA475
14 Endress+Hauser
3.3.2 Installing the assembly into the process
!Note!
Depending on the process connection, please observe the following:
• Check the flange seal between the flanges before installing the assembly.
• The thread adapter nut of thread G 1¼ does not function as a seal. Therefore, simply tighten the
thread adapter nut by hand.
1. Move the assembly into the "Service" position (electrode holder inserted in the assembly).
2. Secure the assembly to the tank or the piping using your selected process connection.
3. Follow the instructions for compressed air and rinse water connection (if used) given in the
following chapters.
3.3.3 Compressed air connection1
Requirements:
• air pressure of 4 to 8 bar (58 to 116 psi)
• air must be filtered (40 µm) and be free of water and oil
• no continuous air consumption
• minimum nominal diameter of the air lines: 4 mm (0.16 inches).
"Caution!
There must be a pressure-reducing valve upstream if the air pressure can increase to above 8 bar
(116 psi) (including any short pressure surges).
We recommend you also use a pneumatic throttle for lower pressures. This results in a smoother
assembly operation. Endress+Hauser offers such a throttle as an accessory (see chapter
"Accessories").
C07-CPA475xx-15-07-06-xx-001.eps
Fig. 10: Pneumatics and limit position switches
M =
S =
M1
M2
S1
S2
1
2
3
4
5
6
Measuring
Service
Pneumatics "Assembly measuring"
Limit position switch "Assembly measuring" 1
Pneumatics "Assembly Service"
Limit position switch "Assembly Service" 1
(see chapter "Pneumatic operation")
Splash protection cap
Assembly housing (cylinder)
Retractable pipe
Stop bolt
Rinse fitting (optional)
Sensor holder (= sensor guide)
1) pneumatic or electric limit position switch depending on assembly version (see product structure)
1) pneumatically operated assembly only
1
M1
2
S1
3
S2
4
M2
5
6

Cleanfit H CPA475 Installation
Endress+Hauser 15
Limit position switches
!Note!
The position of the input resp. the output may be different from the figure. Please, refer to the marks
at the limit position switch: "1" is the input (in), "2" is the output (out).
Pneumatics and limit position switch connection
!Note!
Following, you find the connection of the compressed air lines to the assembly. The compressed air
supply and the tapping of the position feedback signals are described for Topcal S CPC300 resp.
Topclean S CPC30 as an example.
C07-CPA471xx-04-07-00-xx-001.eps
Fig. 12: Pneumatic connections and pneumatic limit position switches (1=inlet, 2=outlet)
M1 Pneumatics "Assembly measuring"
M2 Position feedback signal "Assembly measuring"
S1 Pneumatics "Assembly service"
S2 Position feedback signal "Assembly service"
nTopcal/Topclean: hose no. 2
oTopcal/Topclean: hose no. 3
qTopcal/Topclean: hose no. 5
rTopcal/Topclean: hose no. 6
The pneumatic limit position switches serve as control elements and determine the sequence of the
individual steps.
1. Connect the compressed air supply line for "Assembly measuring" (Topcal/Topclean: hose
no. n) to the upper G¼ pneumatics connection (Fig. 12).
2. Also, connect the compressed air supply line no. nto the inlet (1) of the lower limit position
switch (M2, via T-piece). This limit position switch supplies the position feedback signal
"Assembly measuring".
3. When the "Measuring" position is reached, the air applied to the inlet (1) is switched through
and can be tapped at the outlet (2) (Topcal/ Topclean: connect hose qto the limit position
switch outlet).
4. Connect the compressed air supply line for "Assembly service" (Topcal/Topclean: hose no. o)
to the lower G¼ pneumatics connection.
Pneumatic: 3/2 way valve
Electric: inductive (NAMUR type)
a0002727
Fig. 11: Limit position switches, left: pneumatic (1 = compressed air inlet, 2 = compressed air outlet)
right: electric (NAMUR)
out (2)
out (2)
in (1)
in (1)
1/BN L+Õ
2/BU L–Õ
1
2
1
2
M1
S1
S2
M2
2
3
Topcal /
Topclean
Topcal /
Topclean
6
5

Installation Cleanfit H CPA475
16 Endress+Hauser
5. Also, connect the compressed air supply line no. oto the inlet (1) of the upper limit position
switch (S2, via T-piece). This limit position switch supplies the position feedback signal
"Assembly service".
6. When the position "Service" is reached, the air applied to the inlet (1) is switched through and
can be tapped at the outlet (2) (Topcal/ Topclean: hose no. r).
Electric limit position switch connection
Like the pneumatic limit position switches, the electric limit position switches also serve as control
elements and determine the sequence of the individual steps.
• Connect the NAMUR limit position switches to the corresponding terminals at the transmitter.
Please, refer to the Operating Instructions of the transmitter for the terminal numbers. The
following figure shows the electric limit position switch connection to the terminals 11 to 14 of
the Topcal S control unit, as an example.
3.3.4 Rinse water connection
Connect the rinse water pipe to the designated rinse nozzle:
• Assembly version with G1¼ internal thread process connection (pos. b):
Both rinse nozzles on the assembly are identical. Use one as inlet and the other as outlet.
• all other assembly versions (pos. a):
Connect the rinse nozzles such that the inlet is bottom-up and the outlet top-down.
C07-CPA475xx-16-07-00-xx-001.eps
Fig. 14: Rinse chamber versions (depending on process connection)
a Rinse chamber with welded rinse fittings, for: Triclamp, Dairy fitting, Varivent, APV and flanges
b Rinse chamber with threaded fittings, for: G1¼ internal thread
1Mouldedseal
Operate the rinse water connection of the assembly with a water pressure of 2 to max. 6 bar (29 to
87 psi). In addition, install a non-return valve and a dirt trap (100 µm) in the water supply line (at
the inlet to the assembly).
C07-CPA472xx-04-07-03-xx-002.eps
Fig. 13: Electric limit position switches to Topcal
A
B
NAMUR "Assembly service"
NAMUR "Assembly measuring"
+
+
11 12 13 14 A
B
–
–
1
ab

Cleanfit H CPA475 Installation
Endress+Hauser 17
"Caution!
If it is possible for the water pressure to rise above 6 bar (87 psi, including any transient pressure
surges), install a pressure reducing valve upstream. Otherwise the assembly may be damaged.
Besides water, other or additional cleaning solutions may be used in the rinse chamber. Pay
attention to the material resistance of the assembly and comply with the maximum permitted
temperatures and pressures.
3.3.5 Sensor installation
Gel sensors
"Caution!
If turned in the opposite direction, the stop lock bolt does not engage. This could, however, loosen
the sensor holder. The reason for this is adhesions on the lower part of the sensor holder. These can
cause the sensor holder to get stuck, producing a counterforce when unscrewing the sensor holder.
1. Remove the protection cap from the sensor.
Make sure the sensor shaft is fitted with the
O-ring (Fig. 15 pos. 1) and the thrust collar
(Fig. 15).
2. Moisten the sensor shaft before installing the
sensor.
3. Depending on the assembly version:
a. Manually driven assembly:
Pull the retractable pipe as far as possible
out of the assembly.
b. Pneumatically driven assembly:
Move the assembly into the "Service"
position.
4. Turn the stop lock bolt through 90° so that
the plastic grooves are located above the
recesses (Fig. 16, A).
5. Turn the retractable pipe clockwise until
the stop lock bolt engages (B).
C07-CPSxxxxx-11-05-00-xx-001.eps
Fig. 15: Sensor installation
1O-ring
2 Thrust collar
C07-CPA47xxx-19-07-00-xx-001.eps
Abb. 16: Stop bolt
1. Pull the retractable pipe as far as possible out
of the assembly ("Service" position).
2. Turn the stop lock bolt through 90° so that
the plastic grooves are located above the
recesses (Fig. 17, A).
3. Turn the retractable pipe clockwise until
the stop lock bolt engages (B).
C07-CPA47xxx-19-07-00-xx-001.eps
Fig. 17: Stop bolt
AStep2,seeleft
BStep3
2
1
AB
AB

Installation Cleanfit H CPA475
18 Endress+Hauser
Remove the sensor in the reverse sequence of operations.
!Note!
In case of symmetrical pH measurement, you must push the PML connector onto the PML
connection (PML = potential matching line, position 1). Please, read the Operating Instructions of
the transmitter.
Sensor with liquid KCl electrolyte
1. Pull the retractable pipe as far as possible out of the assembly ("Service" position).
2. Turn the stop lock bolt through 90°, so that the plastic grooves are located above the recesses.
3. Turn the retractable pipe clockwise until the stop lock bolt engages.
"Caution!
If turned in the opposite direction, the stop lock bolt does not engage. This could, however, loosen
the sensor holder. The reason for this is adhesions on the lower part of the sensor holder. These can
cause the sensor holder to get stuck, producing a counterforce when unscrewing the sensor holder.
1. Remove the splash protection cap (Fig. 18,
pos. 5) from the assembly.
2. Then loosen the retractable pipe (pos. 2) by
turning it anticlockwise.
3. Install the sensor (pos. 7) instead of the
dummy plug (pos. 3):
– first screw by hand
– then tighten the sensor by approx. ¼ turn
using an open end wrench (AF 17).
4. Insert the measuring cable through the
retractable pipe (pos. 2):
– Fixed cable:
from the bottom through the retractable
pipe, from the sensor to the transmitter
– Plug-in head sensor:
from the top to the sensor head
5. Plug-in head sensor only:
Connect sensor and cable.
6. Screw the retractable pipe back onto the
pressure cylinder (clockwise, by hand).
7. Place the measuring cable in the splash
protection cap and place the cap on the
retractable pipe.
a0002740
Fig. 18: Sensor installation
1 PML connection
2 Retractable pipe
3 Dummy plug (a=inserted and b=not inserted)
4 Stop lock bolt
5 Splash protection cap
6 Measuring cable with cable plug
7 Sensor or electrode
1
2
3
4
6
5
7

Cleanfit H CPA475 Installation
Endress+Hauser 19
!Note!
In case of symmetrical pH measurement, you must push the PML connector onto the PML
connection (PML = potential matching line, pos. 2). Please, read the Operating Instructions of the
transmitter.
3.4 Post-installation check
• After installation, check that all connections are firmly in position and leak-tight.
• Ensure that the hoses cannot be removed without force.
• Check all hoses for damage.
1. Remove the splash protection cap (Fig. 19,
pos. 6) and the KCl hood (pos. 7) incl. the
protective tube from the assembly.
2. Then slacken the retractable pipe (pos. 3) by
turning it counterclockwise.
3. Screw in the sensor:
a. Unscrew the tension sleeve (pos. 12)
from the inner pipe (pos. 11) and pull the
inner pipe out of the retractable pipe.
b. Install the sensor (pos. 10) into the inner
pipe:
– first screw by hand
– then tighten the sensor by
approx. ¼ turn using an open end
wrench (AF 17).
c. Push the inner pipe with the sensor into
the retractable pipe and screw the
tension sleeve to the inner pipe.
4. Screw the retractable pipe with the sensor
onto the assembly (clockwise, by hand).
5. Insert the measuring cable through the
protective tube and the KCl hood (pos. 7):
– Fixed cable:
from the sensor upwards to the
transmitter
– Sensor with plug-in head:
from the top through the KCl hood to the
sensor
6. Plug-in head sensor only:
Connect sensor and cable.
7. Connect the electrolyte supply tube (pos. 1)
to the electrolyte connection of the sensor.
8. Affix the supplied tubing support (pos. 9) to
the electrolyte supply tube directly above the
electrolyte connection.
9. Attach the KCl hood to the retractable pipe.
Guide the electrolyte supply tube through
the lateral slot of the hood.
10. Place the measuring cable in the splash
protection cap and place it on the protective
tube of the KCl hood.
Remove the sensor in the reverse sequence of
operations.
a0002804
Fig. 19: Liquid KCl electrolyte sensor installation
1 Liquid KCl supply tube
2 PML connection
3 Retractable pipe
4 Dummy plug
5 Stop lock bolt
6 Splash protection cap
7 KCl hood
8Plug-inheadcable
9 Tubing support
10 Sensor with liquid KCl connection
11 Inner pipe
12 Tension sleeve
1
2
3
4
7
8
11
512
10
9
6

Operation Cleanfit H CPA475
20 Endress+Hauser
4Operation
4.1 First commissioning
Before the first commissioning, make sure of the following items:
• All seals are correctly seated (on the assembly and process connection).
• The sensor is correctly installed and connected.
• The water supply line is correctly connected to the rinse connections (if fitted).
• The limit position switches (according to assembly version) are correctly connected.
#Warning!
Danger of squirting medium.
Before applying compressed air to the pneumatic assembly, make sure the connections are correctly
fitted with either rinsing hoses or dummy plugs. Otherwise the assembly may not be put into the
process!
4.2 Operating elements
Use the stop lock bolt to lock or release the retractable pipe (Fig. 20, Fig. 21).
When using manually operated assemblies, the retractable pipe can be locked in both the
"Measuring" position and the "Service" position. When using pneumatically operated assemblies,
this can only be done in the "Service" position.
Releasing the stop lock bolt:
1. Pull the bolt out.
2. Turn the bolt by 90° so that the plastic grooves rest on the metal edge.
Locking the stop lock bolt:
3. Turn the stop lock bolt through 90° so that the plastic grooves are located above the recesses.
4. When the retractable pipe is turned clockwise, the bolt engages.
a0002744
Fig. 20: Releasing the stop lock bolt
a0002745
Fig. 21: Locking the stop lock bolt
12
34