BA02285C/07/EN/01.23-00
71604906
2023-02-10

Products

Solutions

Services

Operating Instructions
FlowFit CPA25
Flow assembly for 12-mm sensors for
pH/ORP, conductivity and oxygen measurement

FlowFit CPA25

Table of contents

Table of contents
1

About this document . . . . . . . . . . . 4

12

1.1
1.2
1.3

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Symbols on the device . . . . . . . . . . . . . . . . 4

12.1 Environment . . . . . . . . . . . . . . . . . . . . . . . 37
12.2 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
12.3 Mechanical construction . . . . . . . . . . . . . 39

2

Basic safety instructions . . . . . . . 5

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

2.1
2.2
2.3
2.4
2.5

Requirements for the personnel . . . . . . . . 5
Intended use . . . . . . . . . . . . . . . . . . . . . . . . 5
Workplace safety . . . . . . . . . . . . . . . . . . . . 5
Operational safety . . . . . . . . . . . . . . . . . . . 6
Product safety . . . . . . . . . . . . . . . . . . . . . . . 6

3

Product description . . . . . . . . . . . . . 7

3.1

Product design . . . . . . . . . . . . . . . . . . . . . . . 7

4Incoming acceptance andproduct identification . . . . . . . . . . 9

4.1
4.2
4.3

Incoming acceptance . . . . . . . . . . . . . . . . . 9
Product identification . . . . . . . . . . . . . . . . 10
Scope of delivery . . . . . . . . . . . . . . . . . . . . 10

5

Mounting . . . . . . . . . . . . . . . . . . . . . . 11

5.1
5.2
5.3

Mounting requirements . . . . . . . . . . . . . . 11
Mounting the assembly . . . . . . . . . . . . . . 13
Post-mounting check . . . . . . . . . . . . . . . . 21

6Commissioning . . . . . . . . . . . . . . . . 21

7

Operation . . . . . . . . . . . . . . . . . . . . . . 22

8

Diagnostics andtroubleshooting . . . . . . . . . . . . . . . 24

9Maintenance . . . . . . . . . . . . . . . . . . 25

9.1
9.2

Maintenance schedule . . . . . . . . . . . . . . . 25
Maintenance tasks . . . . . . . . . . . . . . . . . . 26

10

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . 31

10.1
10.2
10.3
10.4

General information . . . . . . . . . . . . . . . . . 31
Spare parts . . . . . . . . . . . . . . . . . . . . . . . . 31
Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

11

Accessories . . . . . . . . . . . . . . . . . . . . 33

Technical data . . . . . . . . . . . . . . . . . 37

11.1 Device-specific accessories . . . . . . . . . . . . 33
11.2 Service-specific accessories . . . . . . . . . . . 37
Endress+Hauser

3About this document

FlowFit CPA25

1

About this document

1.1

Warnings

Structure of information

Meaning

LDANGERThis symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation will result in a fatal or serious injury.

Causes (/consequences)If necessary, Consequences of noncompliance (if applicable)‣ Corrective action

LWARNING
Causes (/consequences)If necessary, Consequences of noncompliance (if applicable)‣ Corrective action

LCAUTION
Causes (/consequences)If necessary, Consequences of noncompliance (if applicable)‣ Corrective action
NOTICE

This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation can result in a fatal or serious injury.

This symbol alerts you to a dangerous situation.
Failure to avoid this situation can result in minor or more serious injuries.

This symbol alerts you to situations which may result in damage to property.

Cause/situation
If necessary, Consequences of noncompliance (if applicable)‣ Action/note

1.2

Symbols
Additional information, tips
Permitted
Recommended
Forbidden or not recommended
Reference to device documentation
Reference to page
Reference to graphic

Result of a step

1.3

Symbols on the device
Reference to device documentation
Do not dispose of products bearing this marking as unsorted municipal waste. Instead, return them to the
manufacturer for disposal under the applicable conditions.

4

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FlowFit CPA25

2

Basic safety instructions

2.1

Requirements for the personnel

Basic safety instructions• Installation, commissioning, operation and maintenance of the measuring system may be
carried out only by specially trained technical personnel.
• The technical personnel must be authorized by the plant operator to carry out the specified
activities.
• The electrical connection may be performed only by an electrical technician.
• The technical personnel must have read and understood these Operating Instructions andmust follow the instructions contained therein.
• Faults at the measuring point may only be rectified by authorized and specially trained
personnel.
Repairs not described in the Operating Instructions provided must be carried out only
directly at the manufacturer's site or by the service organization.

2.2

Intended use

The Flowfit CPA25 flow assembly is designed for the installation of up to 3x PG 13.5 sensor
slots with a nominal shaft length of approx. 120 mm (4.72 in).
The assembly is used to implement measuring points for nonhazardous liquids in the water /wastewater treatment sectors and in industrial auxiliary processes.
Thanks to its design, it can be used in pressurized systems.
Use of the device for any purpose other than that described, poses a threat to the safety ofpeople and of the entire measuring system and is therefore not permitted.
The manufacturer is not liable for damage caused by improper or non-designated use.

2.3

Workplace safety

As the user, you are responsible for complying with the following safety conditions:• Installation guidelines• Local standards and regulations

Endress+Hauser

5Basic safety instructions

2.4

FlowFit CPA25

Operational safety

Before commissioning the entire measuring point:
1.

Verify that all connections are correct.

2.

Ensure that electrical cables and hose connections are undamaged.

3.

Do not operate damaged products, and protect them against unintentional operation.

4.

Label damaged products as defective.

During operation:‣ If faults cannot be rectified:products must be taken out of service and protected against unintentional operation.

2.5

Product safety

2.5.1

State-of-the-art technology

The product is designed to meet state-of-the-art safety requirements, has been tested, andleft the factory in a condition in which it is safe to operate. The relevant regulations andinternational standards have been observed.

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FlowFit CPA25

Product description

3

Product description

3.1

Product design

1

2
5
3

4
A0051130

1
1
2
3
4
5

Overview of CPA25
Splash cover
Mounting hole
NameplateService cap
Process connection

3.1.1

Operating principle

Process connections
The type of process connection provided can be identified from the direction of the arrow.

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Product description

FlowFit CPA25

1
2

A0052020

2
1
2

Indication of process connection type
Arrow position
Type of process connection

The flow cell can be ordered with the following connections:• G1" female thread• NPT1" female thread
The following process connection adaptations are possible, depending on the ordered version:• G1" to G1/2" female thread• G1" to G3/4" female thread• G1" to hose connection with hose internal diameter ID19 (3/4")‣ Seal process connections with suitable sealing material (e.g. Teflon tape).

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FlowFit CPA25

Incoming acceptance and product identification

4

Incoming acceptance and product identification

4.1

Incoming acceptance1.

Verify that the packaging is undamaged.
 Notify the supplier of any damage to the packaging.
Keep the damaged packaging until the issue has been resolved.

2.

Verify that the contents are undamaged.
 Notify the supplier of any damage to the delivery contents.
Keep the damaged goods until the issue has been resolved.

3.

Check that the delivery is complete and nothing is missing.
 Compare the shipping documents with your order.

4.

Pack the product for storage and transportation in such a way that it is protectedagainst impact and moisture.
 The original packaging offers the best protection.
Make sure to comply with the permitted ambient conditions.

If you have any questions, please contact your supplier or your local Sales Center.

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9Incoming acceptance and product identification

4.2

Product identification

4.2.1

Nameplate

FlowFit CPA25

The nameplate provides you with the following information on your device:• Order code
• Serial number• Permitted pressure• Permitted temperature‣ Compare the information on the nameplate with the order.
4.2.2

Product identification

Product pagewww.endress.com/CPA25
Interpreting the order code
The order code and serial number of your product can be found in the following locations:• On the nameplate• In the delivery papers
Obtaining information on the product1.

Go to www.endress.com.

2.

Page search (magnifying glass symbol): Enter valid serial number.

3.

Search (magnifying glass).
 The product structure is displayed in a popup window.

4.

Click the product overview.
 A new window opens. Here you fill information pertaining to your device, including
the product documentation.

4.2.3

Manufacturer address

Endress+Hauser Conducta GmbH+Co. KG
Dieselstraße 24
D-70839 Gerlingen

4.3

Scope of delivery

The scope of delivery comprises:• Assembly in the version ordered• Splash cover• Service cap• Auxiliary tool for mounting sensor• Anti-bend protector for KCl supply

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FlowFit CPA25

Mounting• Blind plug (3x)• Operating Instructions• Optionally selected accessories‣ If you have any queries:
Please contact your supplier or local sales center.

5.1

Mounting requirements

5.1.1

Dimensions and process connections

G 1" /NPT 1"

2.8 (0.11) (2x)

Ø 68
(2.67)
110 (4.33)

45 (1.77)

110 (4.33)

248 (9.76)
400 (15.74)

Mounting

Ø 40 (1.57)

588(3.46)
A0051249

3

Dimensions. Unit of measurement mm (in)Endress+Hauser

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Mounting

5.1.2

FlowFit CPA25

Mounting instructions

LWARNING
Risk of injury from high pressure, high temperature or chemical hazards if process
medium escapes.
‣ Wear protective gloves, protective goggles and protective clothing.
‣ Mount or dismantle the assembly only when vessels or pipes are empty and unpressurized.
LWARNING
If pressure is too high, this poses a hazard for the measuring point.
‣ Pay attention to the specifications of the assembly.
‣ If pressure can exceed the pressure limit, even briefly, take suitable measures, e.g. use apressure-reducing valve.
• The assembly is designed for installation in pipe networks. Suitable supply lines anddischarge lines must be provided by the customer onsite.
• The seal to the process connections that seals the assembly from the supply and dischargelines must be provided by the customer onsite.

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5.2

Mounting

Mounting the assembly

LWARNING
If process medium and cleaning medium escape, there is a risk of injury due to highpressure, high temperatures or chemicals.
‣ Wear protective gloves, protective goggles and protective clothing.
‣ Mount the assembly only if vessels or pipes are empty and unpressurized.
‣ Before exposing the assembly to the process pressure, verify that all connections aresealed.
NOTICE
Damage to measuring point if excessive force applied.
‣ Secure the assembly.
‣ Secure the pipe sections so they are free of external mechanical stress.
5.2.1

Orientation‣

A0052001

Only mount the assembly vertically.
 This allows the medium to flow through horizontally.

Endress+Hauser

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Mounting

5.2.2

FlowFit CPA25

Wall holderØ 9 (0.35)80(3.15)
88(3.46)
A0051269

414

Dimensions of bore for wall holder. Unit of measurement mm (in)Endress+Hauser

FlowFit CPA25

Mounting

The assembly has an integrated wall holder.

70 (2.75)

323 (12.71)‣

81 (3.18)

37,5 (1.47)

84 (3.30)
A0052073

Screw the assembly onto a wall or mounting plate with suitable screws (see thedimensions).

Endress+Hauser

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Mounting

5.2.3

FlowFit CPA25

Securing on railings or pipes

1

2

A00513071
2

16

Mounting holes for cable ties for strain relief including pipe holder
Boreholes, to secure the assembly on the holder.

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FlowFit CPA25

Mounting

The assembly can be secured on railings or pipes (round or square) with a maximum diameteror side length of 60 mm (2.36 in).

‣ Secure the assembly on railings or pipes with the optional mounting aid.


A0052044

5

5.2.4

Mounting aid

Installing the assembly in the process
p1>p2
p1

p1

p1<p2
p2

p1

p2

p1

A

B

C

D
A0051135

6

Installation versions with and without a bypass

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Mounting

FlowFit CPA25

A

B

C

D

Installation in the main pipe

Branch pipe (bypass without
recirculation)

Bypass with recirculation

Bypass with recirculation• No bypass required• No medium lost
• Limit size of main pipe
• The line must be
interrupted for operation• Limited to mounting andsensor specifications• Measuring point can be
more easily disconnectedfrom the main pipe
• No pressure loss in themain pipe• Only one valve required
for separation• Sample medium is
discarded• Measuring point can be
more easily disconnectedfrom the main pipe
• No medium lost
• No pump required• Pressure loss in the main
pipe (throttle required)• Flow limits• Measuring point canbe more easily
disconnected from themain pipe• No medium lost
• No pump required• Pump required• Flow limits

Bypass installation
An installation in the bypass or branch pipe is preferable to installing directly in the process
pipe.
1.

Mount the assembly in a horizontal pipe.

2.

Select the desired bypass mounting.→  6,  17

3.

Block off the bypass pipe without interrupting the process by using an upstream anddownstream shutoff valve.
 This makes it possible to clean the sensor, for example, without affecting theprocess.

4.

Make sure pressure conditions are correct to guarantee the flow.
 In this way, flow through the assembly is possible in a bypass configuration.

Recommended accessories for the flow
Accessories

Use

1 shutoff valve

For branch pipe (bypass without recirculation)

2 shutoff valves

For bypass solution

Dirt filter

If the medium contains large particles

Pressure-reducing valve

If the process pressure exceeds the permitted value (even briefly)

Installing supply and discharge line
1.

Mount the supply line on the assembly, making sure to use a suitable seal (use a seal ora thread with Teflon tape for example).

2.

Mount the discharge line on the assembly, making sure to use a suitable seal (use a seal
or a thread with Teflon tape for example).

3.

Check that the conduit is seated correctly.
 There should be no tension on the pipes and no bending of any kind.

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FlowFit CPA25

5.2.5

Mounting

Installing the sensors

LWARNING
Leaking process medium. Risk of injury from high pressure, high temperatures or
chemical hazards!
‣ Wear protective gloves, protective goggles and protective clothing.
‣ Mount or dismantle the sensors only when vessels or pipes are empty and unpressurized.
Up to 3 sensors with a PG 13.5 thread and a 120 mm (0.47 in) shaft length can be installed in
the assembly. An alternative would be to combine 2 sensors with KCl supply and anothersensor without a KCl supply.
Required tools:• Socket wrench (AF 17 or AF 19 for Memosens) or• Enclosed hybrid open-ended wrench AF17 / AF19
1.

Remove the blind plug with the O-ring at a free sensor slot and keep it in a safe place.

2.

Remove the protective cap from the sensor.

3.

Verify that there is an O-ring and thrust ring on the sensor.

4.

Screw in the sensor with a socket wrench (AF 17 or AF 19 for Memosens) with approx.
3 Nm (2.21 lbf ft).

5.

Connect the transmitter's measuring cable to the sensor.

6.

For KCl sensors: connect the KCl supply.

7.

A0052120

7

PML (optional)

Optionally connect the PML with cable lug 6.3 mm (0.24 in).
8.

Make sure that all unused sensor slots are sealed with blind plugs.
The blind plug only consists of the O-ring and the plug. A thrust collar is not required.
The O-ring is the same size as the O-ring on the sensor.
The PML cannot be retrofitted.

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Mounting

FlowFit CPA25

Cable routing
NOTICE
Excessive tensile strain on cables or the KCl hose can damage the sensors, measuring
point and cables.
‣ Securely attach the cables.
‣ Ensure sufficient strain relief.
NOTICE
Cables and hoses can be damaged from bending.
‣ Observe the bending radii of the measuring cables.
‣ Use an optional rerouter for the KCl hose.

2
1

3

4

A005204312
3
4

Anti-bend protector for KCl hose
Sensor cables routed correctly
Sensors
Mounting holes for cable ties

1.

Secure the cables and hoses on the back of the assembly in the cable ducts provided.

2.

Make sure the cables and hoses are long enough.

3.

Do not bend the cables and hoses.

4.

Using cable ties, secure the sensor cables and KCL hose at the mounting holes (4).

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FlowFit CPA25

5.3

Commissioning

Post-mounting check

Put the sensor into operation only if you can answer "yes" to the following questions:• Are the sensor and cable undamaged?
• Is the orientation correct?
• Is the sensor installed in an assembly and not suspended from the cable?

6

Commissioning

Before first commissioning, check if:• all seals are correctly seated (on the assembly and on the process connection)• the sensor is correctly installed and connected• the service cap is straight and fully screwed onto the flow cell

LWARNING
Risk of injury from high pressure, high temperature or chemical hazards if process
medium escapes.
‣ Before subjecting the assembly to the process pressure, verify that all connections aretightly sealed!
‣ If you are using a shutoff valve on the rinse chamber as the vent cock, the blind plug mustremain on the outlet side of the rinse chamber! Otherwise, the assembly must not be
introduced into the process!

Endress+Hauser

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Operation

7

FlowFit CPA25

Operation

Locking and unlocking the splash cover
The splash cover protects the sensors and cable connections from splash water, dust and dirt.
The cover is secured by two bolts located on either side. The lock slides engage in the locked
and unlocked position.
1.

A

B
A0051304

8
A
B

Locking the splash cover
LockedUnlocked

Slide the locking mechanism of the splash cover to the right (B).
 The splash cover is unlocked.

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FlowFit CPA25

Operation

2.

A0052028

9

Removing the coverTo open the assembly, exert a slight force on the cover with your thumbs.
 The splash cover can now be removed. The sensors can now be accessed.
3.

To lock, fit the splash cover back on and slide the locking mechanism to the left (A).
 The splash cover is locked.

Endress+Hauser

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Diagnostics and troubleshooting

8

FlowFit CPA25

Diagnostics and troubleshooting

ProblemPossible cause

Tests and/or remedial measures

Medium leaking at
the pipe connection

Sealing material
missing, is damaged orcompression is
insufficient.

‣ Check whether the pipe threaded connection has been tightened
correctly.

‣ Check whether seals (e.g. Teflon tape) are provided on the pipe
threaded connections and are undamaged.

‣ If no seals are used, use a suitable sealing material (e.g. Teflontape) or renew the sealing material‣ Clean the sealing surfaces and seal, provide the seal with a thinfilm of lubricant, replace the seal if necessary.

Medium leaking at
the sensor or blind
plug

Seals (O-rings) areinsufficiently
compressed, missing or
damaged.

‣ Check whether the sensor or blind plug has been installed
correctly.

‣ Check the presence of a thrust collar and seal on the sensor or theseal on the blind plug.

‣ Clean the sealing surfaces and seal, provide the seal with a thinfilm of lubricant, replace the seal if necessary.

Medium leaking at
the service cap

Seal (O-ring) isinsufficiently
compressed, missing or
damaged.

‣ Check whether the service cap has been tightened correctly.
‣ Retighten the service cap if it is loose.
‣ Check whether the seal in the service cap is present and is freefrom damage.

‣ Clean the sealing surfaces and seal, provide the seal with a thinfilm of lubricant, replace the seal if necessary.

Medium leaking at
the PAL pin (option)

Damage to the seal (Oring).

‣ Clean the sealing surfaces and seal, provide the seal with a thin

Medium leaking due
to damaged sealing
surfaces or threads

Damage to assembly‣ Contact Endress+Hauser Support.

film of lubricant, replace the seal if necessary.

Please contact Endress+Hauser Support if the problem cannot be rectified or if other errors
occur.

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FlowFit CPA25

9

Maintenance

Maintenance

LWARNING
Risk of injury if medium escapes‣ Before each maintenance task, ensure that the process pipe is empty and rinsed.
‣ The assembly may contain residual medium; please rinse thoroughly before commencing
work.

9.1

Maintenance schedule

NOTICE
Risk of injury from high pressure, high temperature or chemical hazards if process
medium escapes.
‣ Ensure that the process has stopped before you perform any maintenance tasks.
‣ Wear protective gloves, protective goggles and protective clothing.
‣ Mount or dismantle the assembly only when vessels or pipes are empty and unpressurized.
A maintenance log is recommended to adapt to the correct maintenance intervals.
The specified intervals serve as a guide. For harsh process or ambient conditions, it isrecommended that the interval be shortened accordingly. Cleaning intervals for thesensor and assembly are dependent on the medium.
Following cleaning or replacement, apply a generous layer of silicone grease to the seals,
see silicone grease kit 71573128.
Interval

Maintenance measures

During initial commissioning / when puttingback into service after maintenance‣ Check that all connections are sealed tightly:

Regularly(Approx. 24 hours after initialcommissioning/re-commissioning)

Visual inspection:• Pipe connections• Service cap• Blind plug

‣ Clean and lubricate the assembly depending on the dirt anddeposits.

‣ Check that all connections are sealed tightly and retighten if
necessary:• Pipe connections• Service cap, retighten where necessary• Blind plug

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Maintenance

FlowFit CPA25

Interval

Maintenance measures

Monthly‣ Check that the measuring point is intact.
‣ Replace the seals if medium is escaping.
1.

Remove the service cap.

2.

Check the sensor for deposit buildup and damage.

3.

If deposits are found: check the cleaning cycle (cleaning media,
temperature, duration, flow rate).

When process pressure is applied and cleaning is disabled, there should
be no discharge of medium from the assembly's service cap or sensor
and pipe connections.

‣ Check for defective process seal(s).
BiannuallyorSpecify the maintenance interval as needed.

9.2

Maintenance tasks

9.2.1

Cleaning agent‣ Clean the assembly thoroughly.
‣ Remove any residual medium.
‣ Replace all seals in contact with the medium.

LWARNING
Organic solvents containing halogens
Limited evidence of carcinogenicity! Dangerous for the environment with long-term effects!
‣ Do not use organic solvents that contain halogens.
LWARNING
Thiocarbamide
Harmful if swallowed! Limited evidence of carcinogenicity! Possible risk of harm to the unborn
child! Dangerous for the environment with long-term effects!
‣ Wear protective goggles, protective gloves and appropriate protective clothing.
‣ Avoid all contact with the eyes, mouth and skin.
‣ Avoid discharge into the environment.
The most common types of soiling and the appropriate cleaning agents in each case areshown in the following table.
Pay attention to the material compatibility of the materials to be cleaned.
Type of soiling

Cleaning agent

Greases and oils

Hot water or tempered, surfactant-containing (basic)
agents or water-soluble organic solvents (e.g. ethanol)

Limescale deposits, metalhydroxide buildup, lyophobic
biological buildup

approx. 3% hydrochloric acid

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FlowFit CPA25

Maintenance

Type of soiling

Cleaning agent

Sulfide deposits

Mixture of 3% hydrochloric acid and thiocarbamide(commercially available)

Protein buildup

Mixture of 3% hydrochloric acid and pepsin (commerciallyavailable)

Fibers, suspended substances

Pressurized water, possibly surface-active agents

Light biological buildup

Pressurized water‣ Choose a cleaning agent to suit the degree and type of soiling.

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Maintenance

9.2.2

FlowFit CPA25

Cleaning the assembly

LWARNING
Risk of injury if medium escapes‣ Before each maintenance task, ensure that the process pipe is empty and rinsed.
‣ The assembly may contain residual medium; please rinse thoroughly before commencing
work.
Precondition:
Remove the service cap to clean the assembly and the installed sensors.
1.

Remove deposits and dirt in the service cap

2.

Remove light dirt and fouling with suitable cleaning solutions.

3.

Remove stubborn dirt using a soft brush and a suitable cleaning agent.

4.

For very persistent dirt, soak the parts in a cleaning solution. Then clean the parts witha brush.

5.

Optional: remove the sensors and clean the sensor guide with a suitable brush.

9.2.3

Cleaning the sensor

LWARNING
Risk of injury due to residual medium and elevated temperatures.
‣ When handling parts that are in contact with the medium, protect against residual
medium and elevated temperatures.
‣ Wear protective goggles and safety gloves.
LWARNING
Risk of injury if medium escapes when the cover is removed.
‣ Wear safety gloves and safety goggles‣ When mounting again, make sure the seal is seated correctly.
The assembly has a service cap to clean and calibrate the sensors and assembly.
In event of minor deposit build-up:
1.

Place the sensor in warm water.

2.

Clean the sensor with a mild dishwashing detergent.

→ Documentation of the connected sensor

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FlowFit CPA25

9.2.4

MaintenanceReplacing the seals

LCAUTION
Risk of injury due to residual medium and elevated temperatures‣ When handling parts that are in contact with the medium, protect against residual
medium and elevated temperatures. Wear protective goggles and safety gloves.
Preparatory steps
To replace the seals in the assembly, you must interrupt the process and remove the assemblycompletely.
1.

Interrupt the process.

2.

Remove the sensors.

3.

Remove the assembly.

4.

Clean the assembly.

5.

Clean the sensor guides with a brush.

Replacing the seals
2
1

3
4
A0052078

1
2
3
4

Seal, blind plug
Blind plugSeal, service cap
Service cap

1.

Unscrew the blind plug (2) and service cap (4).

2.

Remove the seals (1, 3); use an O-ring picker to do so.

3.

Lubricate the new seals.

4.

Insert the new seals (1, 3) into the assembly.

5.

Seal the pipe connections and adapters with a suitable sealing material, e.g. PTFE tape.

6.

Screw the blind plug (2) and service cap (4) back on.

7.

Install the assembly in the process.

8.

Install the sensors in the assembly.

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Maintenance

9.

30

FlowFit CPA25

Restart the process.

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FlowFit CPA25

10

Repair

10.1

General information

Repair

The repair and conversion concept provides for the following:• The product has a modular design• Spare parts are grouped into kits which include the associated kit instructions• Only use original spare parts from the manufacturer• Repairs are carried out by the manufacturer's Service Department or by trained users• Certified devices can only be converted to other certified device versions by the
manufacturer's Service Department or at the factory• Observe applicable standards, national regulations, Ex documentation (XA) and certificates
1.

Carry out the repair according to the kit instructions.

2.

Document the repair and conversion and enter, or have entered, in the Life Cycle
Management tool (W@M).

‣ Following repairs, check that the device is complete, in a safe condition and functioning
correctly.

10.2

Spare parts

Device spare parts that are currently available for delivery can be found on the website:
https://portal.endress.com/webapp/SparePartFinder‣ Quote the serial number of the device when ordering spare parts.

10.3

ReturnThe product must be returned if repairs or a factory calibration are required, or if the wrong
product was ordered or delivered. As an ISO-certified company and also due to legal
regulations, Endress+Hauser is obliged to follow certain procedures when handling any
returned products that have been in contact with medium.
To ensure the swift, safe and professional return of the device:‣ Refer to the website www.endress.com/support/return-material for information on theprocedure and conditions for returning devices.

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31Repair

10.4

FlowFit CPA25

Disposal

If required by the Directive 2012/19/EU on waste electrical and electronic equipment(WEEE), the product is marked with the depicted symbol in order to minimize the disposalof WEEE as unsorted municipal waste. Do not dispose of products bearing this marking as
unsorted municipal waste. Instead, return them to the manufacturer for disposal under theapplicable conditions.

32

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FlowFit CPA25

11

Accessories

Accessories

The following are the most important accessories available at the time this documentation
was issued.
Listed accessories are technically compatible with the product in the instructions.
1.

Application-specific restrictions of the product combination are possible.
Ensure conformity of the measuring point to the application. This is the responsibility ofthe operator of the measuring point.

2.

Pay attention to the information in the instructions for all products, particularly thetechnical data.

3.

For accessories not listed here, please contact your Service or Sales Center.

11.1

Device-specific accessories

11.1.1

Sensors

pH sensors
Memosens CPS11E• pH sensor for standard applications in process and environmental engineering• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps11e
Technical Information TI01493C
Orbisint CPS11• pH sensor for process technology• With dirt-repellent PTFE diaphragm• Product Configurator on the product page: www.endress.com/cps11
Technical Information TI00028C
Memosens CPS31E• pH sensor for standard applications in drinking water and swimming pool water• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps31e
Technical Information TI01574C
Ceraliquid CPS41• pH electrode with ceramic junction and KCl liquid electrolyte• Product Configurator on the product page: www.endress.com/cps41
Technical Information TI00079C

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Accessories

FlowFit CPA25

Memosens CPS41E• pH sensor for process technology• With ceramic junction and KCl liquid electrolyte• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps41e
Technical Information TI01495C
Memosens CPS61E• pH sensor for bioreactors in life sciences and for the food industry• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps61e
Technical Information TI01566C
Memosens CPS71E• pH sensor for chemical process applications• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps71e
Technical Information TI01496C
Ceragel CPS71• pH electrode with reference system including ion trap
• Product Configurator on the product page: www.endress.com/cps71
Technical Information TI00245C
Memosens CPS91E• pH sensor for heavily polluted media• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps91e
Technical Information TI01497C
Orbipore CPS91• pH electrode with hole junction for media with high dirt load
• Product Configurator on the product page: www.endress.com/cps91
Technical Information TI00375C
ORP sensors
Memosens CPS12E• ORP sensor for standard applications in process and environmental engineering• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps12e
Technical Information TI01494C

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FlowFit CPA25

Accessories

Orbisint CPS12• ORP sensor for process technology• Product Configurator on the product page: www.endress.com/cps12
Technical Information TI00367C
Memosens CPS42E• ORP sensor for process technology• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps42e
Technical Information TI01575C
Ceraliquid CPS42• ORP electrode with ceramic junction and KCl liquid electrolyte• Product Configurator on the product page: www.endress.com/cps42
Technical Information TI00373C
Memosens CPS72E• ORP sensor for chemical process applications• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps72e
Technical Information TI01576C
Ceragel CPS72• ORP electrode with reference system including ion trap
• Product Configurator on the product page: www.endress.com/cps72
Technical Information TI00374C
pH-ISFET sensors
Memosens CPS47E• ISFET sensor for pH measurement• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps47e
Technical Information TI01616C
Memosens CPS77E• Sterilizable and autoclavable ISFET sensor for pH measurement• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps77e
Technical Information TI01396

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Accessories

FlowFit CPA25

Combined pH/ORP sensors
Memosens CPS16E• pH/ORP sensor for standard applications in process technology and environmental
engineering• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps16e
Technical Information TI01600C
Memosens CPS76E• pH/ORP sensor for process technology• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps76e
Technical Information TI01601C
Memosens CPS96E• pH/ORP sensor for heavily polluted media and suspended solids• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps96e
Technical Information TI01602C
Conductivity sensors
Memosens CLS82E• Hygienic conductivity sensor• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cls82e
Technical Information TI01529C
Oxygen sensors
Oxymax COS22E• Sterilizable sensor for dissolved oxygen• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cos22e
Technical Information TI00446C
Oxymax COS22D / COS22• Sterilizable sensor for dissolved oxygen• With Memosens technology or as an analog sensor• Product Configurator on the product page: www.endress.com/cos22d or
www.endress.com/cos22
Technical Information TI00446C

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FlowFit CPA25

Technical data

Memosens COS81E• Hygienic optical oxygen sensor with maximum measurement stability over multiple
sterilization cycles• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cos81e
Technical Information TI01558C
11.1.2

Process connections• G1" to G1/2" female thread; Order No. 71604519• G1" to G3/4" female thread; Order No. 71604521
11.1.3

Mounting accessories

Railing holder; Order No. 71573126

11.2

Service-specific accessories• Splash cover; Order No. 71572887• Service cap; Order No. 71573088• Cover without PML; Order No. 71573103• Cover with PML 316L/EPDM; Order No. 71573106• Cover with PML titanium/EPDM; Order No. 71573116• Cover with PML 316L/FKM; Order No. 71573119• Cover with PML titanium/FKM; Order No. 71573121• Blind plugs PG13.5; Order No. 71573122
11.2.1

Cleaning accessories

Cleaning brushes; Order No. 71573123
11.2.2Seals• EPDM seals; Order No. 71572882• FKM seals; Order No. 71572884• Silicone grease for seals; Order No. 71573128

12

Technical data

12.1

Environment

12.1.1

Ambient temperature range-15 to +60 °C (5 to +140 °F)
12.1.2

Storage temperature-15 to +60 °C (5 to +140 °F)
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Technical data

12.2

FlowFit CPA25

Process

Thermoplastics have temperature-dependent mechanical properties.

‣ Observe these properties when selecting components.
12.2.1

Process temperature range

0 to 80 °C (32 to 176 °F)
12.2.2

Process pressure range

0 to 6 bar (0 to 87 psi) relative
Maximum pressure at up to 20°C (68°F)
6 bar (87 psi) gauge pressure
Maximum pressure at 80°C (176°F)
1 bar (14.5 psi) gauge pressure°F
40 60 80 100 120 140160 180 200 220 240
176
68
6

87
80
70
60
50 psi
40
30
20
15

5
4
bar

3
2
1
20

40

60

80
°C

100

115
A0051695

 1012.2.3Temperature/pressure ratings

Flow limit

Flow velocity‣ Pay attention to limitations of the sensors.
Depending on the flow velocity, the zeta value of the assembly is between: 4.5 to 5.5

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FlowFit CPA25

12.3

Mechanical construction

12.3.1

Design, dimensions

Technical data

→ Section "Installation"
12.3.2

WeightApprox. 0.8 kg (1.8 lbs)
12.3.3

Materials

Component

Material

Flow housing

PP

Service cap

PP

Splash coverPP

Adapters

PP

Blind plug

PVDF

PAL option 1(option 1 and 2 mutually exclude one another)

1.4404/316L

PAL option 2(option 1 and 2 mutually exclude one another)

3.7035/ Ti Grade 2

12.3.4

Process connections

Depending on version:• 2 x G1 (female)• 2 x NPT 1" (female)
Optional adapters:• G1" to G1/2" female thread• G1" to G3/4" female thread
Seal is supplied by customer:
e.g. PTFE tape12.3.5

Sensor connections

3x PG13.5
Supported shaft length
120 mm (4.72 in)Maximum number of sensors installed
3 sensors possible, e.g.:• 2 with Memosens connection• 1 with KCl connection

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39IndexFlowFit CPA25

Index
A

Symbols . . . . . . . . . . . . . . . . . . . . . . . . 4

Accessories . . . . . . . . . . . . . . . . . . . . . 33

C
Cleaning . . . . . . . . . . . . . . . . . . . . . . . 28
Cleaning agent . . . . . . . . . . . . . . . . . . . 26

T
Technical data . . . . . . . . . . . . . . . . . . . 37
Transport . . . . . . . . . . . . . . . . . . . . . . . 9

UD

Use . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Dimensions . . . . . . . . . . . . . . . . . . . . . 11
Disposal . . . . . . . . . . . . . . . . . . . . . . . 32

W

I

Warnings . . . . . . . . . . . . . . . . . . . . . . . 4

Incoming acceptance . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . 13
Intended use . . . . . . . . . . . . . . . . . . . . . 5

M
Maintenance . . . . . . . . . . . . . . . . . . . . 25
Maintenance intervals . . . . . . . . . . . . . . . 25
Maintenance schedule . . . . . . . . . . . . . . . 25
Mounting . . . . . . . . . . . . . . . . . . . . . . 11
Mounting instructions . . . . . . . . . . . . . . . 12
Mounting requirements . . . . . . . . . . . . . . 11

N
Nameplate . . . . . . . . . . . . . . . . . . . . .

10OO-rings . . . . . . . . . . . . . . . . . . . . . . . . 29
Operational safety . . . . . . . . . . . . . . . . . . 6

P
Post-mounting check . . . . . . . . . . . . . . . 21
Product identification . . . . . . . . . . . . . . . . 9

R
Repair . . . . . . . . . . . . . . . . . . . . . . . . 31
Return . . . . . . . . . . . . . . . . . . . . . . . . 31

S
Safety instructions . . . . . . . . . . . . . . . . . . 5
Scope of delivery . . . . . . . . . . . . . . . . . . 10
Seals . . . . . . . . . . . . . . . . . . . . . . . . . 29
Spare parts . . . . . . . . . . . . . . . . . . . . . 31
Storage . . . . . . . . . . . . . . . . . . . . . . . . 9
Suitable sensors . . . . . . . . . . . . . . . . . . 11
40

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*71604906*
71604906

www.addresses.endress.com