Endress+Hauser 51517656 CleanFit H CPA 475 User manual

Quality made by
Endress+Hauser
ISO 9001
BA 240C/07/en/07.03
51517656
CleanFit H CPA 475
Retractable Process Assembly
Operating Instructions

CleanFit H CPA 475
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 . . . . . . . . . . . . . . . . . 11
3.4 Post-installation check . . . . . . . . . . . . . . . . . . 17
4 Operation . . . . . . . . . . . . . . . . . . . . . 18
4.1 First commissioning . . . . . . . . . . . . . . . . . . . . 18
4.2 Operating elements . . . . . . . . . . . . . . . . . . . . 18
4.3 Manual operation . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Pneumatic operation . . . . . . . . . . . . . . . . . . . 19
5 Maintenance . . . . . . . . . . . . . . . . . . 20
5.1 Cleaning the assembly . . . . . . . . . . . . . . . . . 20
5.2 Cleaning the sensor . . . . . . . . . . . . . . . . . . . . 20
5.3 Cleaning agents . . . . . . . . . . . . . . . . . . . . . . . 21
5.4 Notes on calibration . . . . . . . . . . . . . . . . . . . . 21
6 Accessories . . . . . . . . . . . . . . . . . . . 22
6.1 Installation accessories . . . . . . . . . . . . . . . . . 22
6.2 Limit position switches . . . . . . . . . . . . . . . . . . 23
6.3 Pneumatic throttle . . . . . . . . . . . . . . . . . . . . . 23
6.4 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.5 Calibration solutions . . . . . . . . . . . . . . . . . . . 24
6.6 Measuring cables . . . . . . . . . . . . . . . . . . . . . 24
6.7 Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.8 Measuring, cleaning and calibration systems 25
6.9 Documentation . . . . . . . . . . . . . . . . . . . . . . . . 25
7 Trouble-shooting. . . . . . . . . . . . . . . 26
7.1 Replacing damaged parts . . . . . . . . . . . . . . . 26
7.2 Replacing seals . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Spare part kits . . . . . . . . . . . . . . . . . . . . . . . . 28
7.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.5 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Technical data . . . . . . . . . . . . . . . . . 31
8.1 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.3 Mechanical construction . . . . . . . . . . . . . . . . . 32
Index . . . . . . . . . . . . . . . . . . . . . . . . . 33

Safety instructions CleanFit H CPA 475
4Endress+Hauser
1Safetyinstructions
1.1 Designated use
The manually or pneumatically operated retractable assembly Cleanfit H CPA 475 is
designed for installing pH/redox sensors in tanks and pipes under sterile conditions.
Its mechanical design permits its use in pressurized 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, electrical connection, 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.
•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 Endress+Hauser 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 Endress+Hauser
sales centre responsible.
Please use the original packaging, if possible.
Please enclose the completed Dangerous Goods sheet (copy the second last page of
these Operating instructions) with the packaging and also the shipping documents.
No repair without completed Dangerous Goods sheet!

CleanFit H CPA 475 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 CPA 475
6Endress+Hauser
2 Identification
2.1 Nameplate
You can recognise the assembly version from the order code on the nameplate. Please
compare this with your order.
You can find the possible assembly versions and the resulting order code from 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 Endress+Hauser sales
centre responsible (see back page of these Operating Instructions).
2.3 Certificates and approvals
2.3.1 3A
Following versions meet the requirements of the rule 3A 74-01:
•CPA 475-XXXXXXCX (process connection: triclamp)
•CPA 475-XXXXXXDX (process connection: dairy fitting)
•CPA 475-XXXXXXEX (process connection: varivent)
•CPA 475-XXXXXXFX (process connection: APV)
2.3.2 EHEDG
TNO report V3641:
"The retractable assembly for pH measurement CleanFit H CPA 475 – including the
seals – is classified as in-line steam sterilisable by a 30 minute saturated steam
treatment at a temperature of 120 °C." 1
C07-CPA475xx-18-07-00-en-001.eps
Fig. 1: Example of a nameplate
1) acc. to the test method of the European Hygienic Design Group (EHEDG)
ENDRESS+HAUSER
CLEANFIT H CPA 475
order code:
serial no.:
spec.
pressure: PN=10 bar T=100°C
CPA475-C1A1B2H4
5 13719 07B11

CleanFit H CPA 475 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 liquid 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)
C Tri-Clamp 2"
D Dairy fitting DN 50 (acc to. DIN 11 851)
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)
H 2" ANSI flange
Optional equipment
3 With rinse fitting 2 x G ¼ internal thread
4 With rinse fitting 2 x NPT ¼" internal thread
CPA 475- complete order code

Installation CleanFit H CPA 475
8Endress+Hauser
3Installation
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 Endress+Hauser
sales centre responsible (see back page of these Operating Instructions).
3.2 Installation conditions
3.2.1 Notes on installation
The assembly is designed for installation on tanks and pipes. Suitable nozzles must be
available for this.
!
Note!
•When using standard glass electrodes, only installation positions are permitted in
which the middle axis of the assembly lies at least at an angle of 15° 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.
•When using an ISFET TopHit H sensor, there are, in principle, no restrictions for the
installation position. An installation angle of 0 to 180° is, however, recommended.
C07-CPA47xxx-17-07-00-xx-002.eps
Fig. 2: Installation angle
A Glass electrodes: minimum 15 ° to the horizontal
B ISFET sensors: recommended 0 ... 180 °, overhead possible (depending on sensor type)
15° 15°
AB

CleanFit H CPA 475 Installation
Endress+Hauser 9
C07-CPA471xx-17-07-00-xx-002.eps
Fig. 3: Installation examples with recommended installation angle (glass electrodes)
A Tank
B Pipe bend
C Horizontal pipe
D Ascending pipe
"
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").
> 15 °
> 15 °
> 15 °
> 15 °
AB
CD
1) Siphon effect: line emptied by vacuum

Installation CleanFit H CPA 475
10 Endress+Hauser
3.2.2 Dimensions
C07-CPA475xx-06-07-00-en-002.eps
Fig. 4: Varivent version
C07-CPA475xx-06-07-00-en-001.eps
Fig. 5: Liquid KCl electrolyte
version
C07-CPA475xx-06-07-00-en-006.eps
Fig. 6: 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

CleanFit H CPA 475 Installation
Endress+Hauser 11
3.2.3 Process connections
3.3 Installation instructions
3.3.1 Measuring system
C07-CPA475xx-04-07-07-en-001.eps
Fig. 7: 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
C07-CPA471xx-04-07-03-xx-001
Fig. 8: Fully automatic measuring system (example)
A, B For information on function and connection ofthe pneumatic resp. electric limit position switches to the
assembly, please refer to the related chapters.
1
4
9
Assembly
Special measuring cable, e.g. CPK 9, CPK 12
Rinse block CPR 40 (optionally)
a
b
c
Electric line
Compressed air line
Water / cleaning agent / buffer
TopCal S CPC 300:1
1) Fully automatic calibration and cleaning system
Supply lines:
2
3
5
6
7
8
Transmitter Mycom S CPM 153
Control unit CPG 300
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 CPM 153
Power supply for CPG 300
Compressed air
Water supply
Steam / water / cleaning agent (optionally)
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
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 CPA 475
12 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.
Move the assembly into the "Service" position (electrode holder inserted in the
assembly) and secure the assembly to the tank or the piping using your selected
process connection.
3.3.3 Compressed air connection1
The assembly is operated with an air pressure of 4 to 8 bar (58 to 116 psi). The air must
be filtered (40 µm) and be free of water and oil. There is no continuous air consumption.
The air lines must have a minimum nominal diameter of 4 mm (0.16 inch).
"
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. E+H offers such a throttle as an accessory (see chapter
"Accessories").
C07-CPA475xx-15-07-06-xx-001.eps
Fig. 9: 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 CPA 475 Installation
Endress+Hauser 13
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, "2" is the output.
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 discribed
for TopCal S CPC 300 resp. TopClean S CPC 30 as an example.
C07-CPA471xx-04-07-00-xx-001.eps
Fig. 11: 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"
➁TopCal/TopClean: hose no. 2
➂TopCal/TopClean: hose no. 3
➄TopCal/TopClean: hose no. 5
➅TopCal/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. ➁) to the upper G¼ pneumatics connection (Fig. 11).
2. Also, connect the compressed air supply line no. ➁to 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 ➄to
the limit position switch outlet).
Pneumatic: 3/2 way valve
Electric: inductive (NAMUR type)
C07-CPA471xx-04-07-08-xx-001.eps
Fig. 10: Limit position switches, left: pneumatic (1 = compressed air inlet, 2 = compressed air outlet)
right: electric (NAMUR)
2
1
1 / BN L+→
2 / BU L–→
1
2
1
2
M1
S1
S2
M2
2
3
TopCal /
TopClean TopCal / TopClean
6
5

Installation CleanFit H CPA 475
14 Endress+Hauser
4. Connect the compressed air supply line for "Assembly service" (TopCal/TopClean:
hose no. ➂) to the lower G¼ pneumatics connection.
5. Also, connect the compressed air supply line no. ➂to 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. ➅).
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 (see fig., pos. b):
Both rinse nozzles on the assembly are identical. Use one as an inlet and the other as
an 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. 13: 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
1 Moulded seal
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. 12: Electric limit position switches to TopCal
A
B
NAMUR "Assembly service"
NAMUR "Assembly measuring"
+
+
11 12 13 14 A
B
–
–
1
ab

CleanFit H CPA 475 Installation
Endress+Hauser 15
"
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.
4. Remove the splash protection cap (Fig. 16, position 5) from the assembly.
5. Then loosen the retractable pipe (position 2) by turning it anticlockwise.
1. Before installing a sensor, remove the
dummy plug from the assembly.
2. Remove the yellow protection cap of
the sensor.
Make sure the sensor shaft is fitted with
the O-ring (Fig. 14, A) and the thrust
collar (B).
3. Moisten the sensor shaft before
installing the sensor.
C07-CPSxxxxx-11-05-00-xx-001.eps
Fig. 14: Sensor installation
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. 15, A).
3. Turn the retractable pipe clockwise
until the stop lock bolt engages (B).
C07-CPA47xxx-19-07-00-xx-001.eps
Fig. 15: Stop bolt
A Step 2,see left
BStep3
B
A
AB

Installation CleanFit H CPA 475
16 Endress+Hauser
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.
4. Remove the splash protection cap (Fig. 17, position 6) and the KCl hood
(position 7) from the assembly.
5. Then slacken the retractable pipe by turning it anticlockwise.
6. Unscrew the tension sleeve (position 10).
7. Remove the sensor holder (position 9) from the retractable pipe.
6. Remove the dummy plug (position 3).
7. Screw the sensor or the electrode
(position 7) into the sensor holder by
hand.
8. Tighten the sensor using a socket
wrench (AF 17) by approx. ¼ turn.
9. Insertthe measuringcablefromthetop
through the retractable pipe (pos. 2).
10.Plug the measuring cable into the
sensor plug-in head using the cable
plug (position 6) and tighten it by hand.
11.Screw the retractable pipe back onto
the pressure cylinder (clockwise, by
hand).
12.Place the measuring cable in the
splash protection cap and place it on
the retractable pipe.
13.Push the PML connector onto the PML
connection (PML = potential matching
line, position 1).
14.Release the stop lock bolt catch by
pulling it out and turning it by 90°.
Remove the sensor in the reverse
sequence of operations.
C07-CPA473xx-09-07-06-xx-002.eps
Fig. 16: 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
a
b

CleanFit H CPA 475 Installation
Endress+Hauser 17
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.
8. Screwthesensorintothe sensorholder
by hand.
9. Tighten the sensor using a socket
wrench (AF 17) by approx. ¼ turn.
10.Push the sensor holder with the sensor
into the retractable pipe.
11.Insert the tension sleeve from the
bottom into the retractable pipe and
screw it to the sensor holder.
12.Screw the retractable pipe with the
sensor onto the assembly (by hand).
13.Insert themeasuringcablefromthetop
throughtheprotectivetubeandtheKCl
hood (position 7).
14.Screw the measuring cable onto the
sensor plug-in head and tighten it by
hand.
15.Push the PML connector onto the PML
connection (PML = potential matching
line, position 2).
16.Insert the electrolyte supply tube
(position 1) through the KCl hood and
connect it to the electrolyte connection
of the sensor.
17.Attach the KCl hood to the retractable
pipe.
18.Place the measuring cable in the
splash protection cap and place it on
the protective tube of the KCl hood.
19.Release the stop lock bolt catch (pull it
out and turn it by 90°).
Remove the sensor in the reverse
sequence of operations.
C07-CPA473xx-09-07-06-xx-003.eps
Fig. 17: Liquid KCl electrolyte sensor installation
1 Liquid KCl supply tube
2 PML connection
3 Retractable pipe
4 Dummy plug (a = inserted, b = not inserted)
5 Stop lock bolt
6 Splash protection cap
7 KCl hood
8 Sensor with liquid KCl connection
9 Sensor holder
10 Tension sleeve
1
2
3
4
7
8
9
a
b
5
6
10

Operation CleanFit H CPA 475
18 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. 18, Fig. 19).
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.
C07-CPA47xxx-19-07-01-xx-002.eps
Fig. 18: Releasing the stop lock bolt
C07-CPA47xxx-19-07-01-xx-003.eps
Fig. 19: Locking the stop lock bolt
12
34

CleanFit H CPA 475 Operation
Endress+Hauser 19
4.3 Manual operation
Moving the assembly from the "Service" position to the "Measuring" position
1. Release the stop lock bolt catch.
2. Push the retractable pipe so that the sensor holder is inserted fully into the process.
3. Lock the sensor holder with the stop lock bolt. This prevents the retractable pipe
from returning inadvertently into the "Service" position.
#
Warning!
Risk of injury!
Always lock the sensor holder. Otherwise, the retractable pipe may exit uncontrolled as
a result of the process pressure and injure somebody.
Moving the assembly from the "Measuring" position to the "Service" position
1. Release the stop lock bolt catch.
2. Pull the retractable pipe out as far as possible ("Service" position).
3. Lock the sensor holder with the stop lock bolt.
4. Complete the necessary service tasks.
4.4 Pneumatic operation
Operation of the pneumatic version depends on the control fitted. Refer to the control
operating manual for instructions.
"
Caution!
•During maintenance work (e.g. installing and removing the sensor), always lock the
assembly in the "Service" position by the stop bolt.
•During the automatic rinse process, do not lock the retractable pipe by the stop bolt.
Otherwise the assembly can no longer move automatically to the "Measuring" position.
•If a maintenance switch is fitted on the transmitter, set it to "Maintenance" or "Service".
!
Note!
It is not possible to lock the assembly in the "Measuring" position. The pneumatic
system maintains the back pressure to the process pressure.

Maintenance CleanFit H CPA 475
20 Endress+Hauser
5 Maintenance
#
Warning!
Risk of injury!
Before starting maintenance work on the assembly, make sure that the process line and
the tank are depressurised, empty and rinsed.
Move the assembly to the "Service" position and lock the retractable pipe by the stop
lock bolt.
5.1 Cleaning the assembly
To ensure a reliable measurement, the assembly and the sensor must be cleaned at
regular intervals. The frequency and intensity of the cleaning operation depend on the
process medium.
5.1.1 Manually operated assembly
All parts in contact with the medium, e.g. the sensor and the sensor holder, must be
cleaned at regular intervals. Remove the sensor1.
•Remove light dirt using suitable cleaning agents (see chapter "Cleaning agents").
•Remove severe fouling with a soft brush and a suitable cleaning agent.
•Remove persistant fouling by soaking in a liquid cleaner and if neccessary by
cleaning with a soft brush.
5.1.2 Pneumatically operated assembly
Pneumatically-controlled cleaning can be carried out regularly via the rinse connection
and the corresponding equipment, e.g. with the fully automatic cleaning and calibration
system TopCal S CPC 300.
5.2 Cleaning the sensor
You have to clean the sensor:
•before every calibration
•regularly during operation
•before being returned for repair
You can remove and clean the sensor manually or perform cleaning in automatic
operation2via the rinse connection.
!
Note!
•Clean redox electrodes only mechanically and with water, do not use any chemical
cleaning agents. These cleaning agents apply a potential to the electrode that takes
several hours to decay. This potential causes measuring errors.
•Do not use any abrasive cleaning agents. This can lead to irreparable damage of the
sensor.
•After cleaning the sensor, rinse the rinse chamber of the assembly with copious
amounts of water (possibly distilled or de-ionised). Otherwise, remaining residues of
cleaning agent can corrupt measurement.
•If required, re-calibrate after cleaning.
1) in reverse sequence of operations to the installation procedure
2) with the corresponding assembly equipment only