Endress+Hauser UniFit CPA 441 Bedienungsanleitung

BA 026C/07/en/06.99

No. 51500738 UniFit H

CPA 441

Process Assembly for

pH/Redox Measurement

Operating Instructions

Hauser+Endress

Nothing beats know-how

uality made by

Endress+Hauser

ISO 9001

Table of contents

1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.1 Symbols used ............................................................. 2

1.2 Storage and transport ....................................................... 2

1.3 Unpacking ................................................................ 2

1.4 Packaging and disposal ..................................................... 2

1.5 Product structure ........................................................... 3

2 Safety............................................................... 4

2.1 Intended use .............................................................. 4

2.2 General safety notes ........................................................ 4

2.3 Installation, start-up, operation ................................................ 4

2.4 Safety features ............................................................. 5

2.5 Notes for installation in pressurised systems...................................... 5

3 Installation........................................................... 6

3.1 Measuring system .......................................................... 6

3.2 Dimensions ............................................................... 6

3.3 Mounting positions and mounting versions ....................................... 7

3.4 Installation or replacement of electrode and mounting of measuring cable .............. 8

3.5 Filling with electrolyte....................................................... 10

4 Maintenance........................................................ 12

4.1 Assembly cleaning......................................................... 12

4.2 Electrode cleaning ......................................................... 12

4.3 Calibration ............................................................... 13

4.4 O-ring replacement ........................................................ 14

5 Accessories and spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6 Technicaldata....................................................... 16

7 Index............................................................... 17

PA441E00.CHP

UniFit H CPA 441 Table of contents

Endress+Hauser 1

1 General information

1.1 Symbols used

Warning:

This symbol alerts to hazards.

Failure to observe these warnings

may result in injury or damage to

equipment.

Note:

This symbol indicates important

items of information. Ignoring this

information may result in malfunction.

1.2 Storage and transport

The packaging material used to store or

transport the assembly must provide shock

protection. Optimal protection is provided by

the original packaging materials.

The ambient conditions also have to meet the

requirements (see Technical data).

1.3 Unpacking

Verify that the packaging and contents

are undamaged! Inform the post office or

freight carrier of any damage. Damaged

merchandise must be retained until the

matter has been settled.

Check that the delivery is complete and agrees

with the shipping documents and your order

(refer to nameplate for type and version).

The delivery comprises:

•Assembly UniFit H CPA 441

•Size 17 socket wrench

•Built-in adapter, as per your order already

mounted or separate

•Operating instructions BA 026C/07/en.

Keep the original packaging materials for

future storage or shipping of the assembly.

If you have any questions, consult your

supplier or the Endress+Hauser sales

agency in your area (see back cover of

these operating instructions for addresses).

1.4 Packaging and disposal

Package the assembly properly for reuse at

a later point in time. Optimal protection is

provided by the original packaging materials.

Observe local regulations for disposal.

General information UniFit H CPA 441

2Endress+Hauser

1.5 Product structure

O-ring / body / protection guard

11 EPDM / PVC / screw-in (only version A)

12 EPDM / PVDF / screw-in (only version A)

13 EPDM / 1.4571 (SS 316Ti) / screw-in

14 EPDM / 1.4571 (SS 316Ti) / plug-in

23 Viton / 1.4571 (SS 316Ti) / screw-in

24 Viton / 1.4571 (SS 316Ti) / plug-in

Mounting version

A Without adapter

F Adapter 1.4571 (SS 316Ti) / DN 25, G 1¼ / straight

G Adapter 1.4571 (SS 316Ti) / DN 25, G 1¼ / oblique

I Adapter 1.4571 (SS 316Ti) / dairy fitting DN 40

K Adapter 1.4571 (SS 316Ti) / Tri-Clamp 2"

L Adapter 1.4571 (SS 316Ti) / Varivent for DN 40 ... 125 (only version 14)

CPA 441- complete order code

pH/redox process assembly UniFit H CPA 441

PA441E01.CHP

UniFit H CPA 441 General information

Endress+Hauser 3

2 Safety

2.1 Intended use

The pH/redox process assembly UniFit H

CPA 441 is intended for applications where

the components in contact with medium must

be steam-sterilised. Typical areas of application

are fermenters, food industry, highly pasty

media and media with very low conductivity.

The assembly consists of a built-in part and

a vessel filled with liquid electrolyte. The cap

of the electrolyte vessel contains the thread

which will hold the electrode, a manometer

and a screw coupling for the compressed-air

connection. This quick-release coupling also

serves as opening for refilling the electrolyte.

It is not necessary to remove the assembly or

the electrode to refill. The pressure may be

applied by compressed air or a manual pump.

It is the operator’s responsibility to assure that

the following safety regulations are observed:

•Regulations for explosion protection

•Regulations for installation

•Operating conditions for the device and its

materials

•Local standards and regulations.

2.2 General safety notes

The assembly CPA 441 has been designed

for safe operation according to the state of the

art in engineering and according to current

regulations and European standards (see

Technical data).

However, if used improperly or other than for

the intended purpose, it may be dangerous,

e.g. due to incorrect installation or incorrect

operating conditions.

Warning:

•Operating this assembly in any

way other than described in these

instructions may compromise

the safety and function of the

measuring system.

•The notes and warnings in these

operating instructions must be

strictly adhered to.

2.3 Installation, start-up, operation

Warning:

•This device may only be installed,

connected electrically,

commissioned, operated and

serviced by properly trained

personnel authorised by the

system operator.

•The personnel must be familiar

with these operating instructions

and must adhere to the

instructions contained therein.

•When this assembly is used in an

explosive atmosphere, adherence

to the applicable regulations is

mandatory.

•Check that all connections have

been properly made before

powering up the system.

•Damaged assemblies that may be

dangerous must not be operated

and should be clearly identified as

being defective.

•Any troubleshooting of the

measuring system must be

performed exclusively by

authorised, trained personnel.

•If faults cannot be remedied, the

assembly must be removed from

service and secured to prevent

accidental start-up.

•Repairs not described in these

operating instructions may only

be performed directly at the

manufacturer’s works or by

the Endress+Hauser service

organisation.

Safety UniFit H CPA 441

4Endress+Hauser

2.4 Safety features

Safety devices

The assembly is protected against external

influences and damage by media-resistant

materials.

2.5 Notes for installation in pressurised systems

Warning:

•The maximum operating pressure

of the assembly must not be

exceeded.

•The system must be depressurised

before installation or removal of

the assembly.

•Couplings, cocks and lines must

be checked for leakage and

damage at regular intervals.

PA441E02.CHP

UniFit H CPA 441 Safety

Endress+Hauser 5

3 Installation

3.1 Measuring system

A complete measuring system comprises:

•the UniFit H CPA 441 assembly

•a combined pH/redox electrode,

length 225 mm

•a measuring cable CPK 1 or CPK 7

(terminated)

•a pH/redox measuring instrument

and optionally

•a junction box VBA and a measuring cable

(not terminated) for measuring cable

extension.

3.2 Dimensions

PA441SYS.CDR

Protection sleeve

Junction box VBA

UniFit H CPA 441 assembly

Measuring cable

Skintop gland Pg 16

PM connection

Electrode holder

Electrode

pH measuring instrument

MyPro CPM 431

Protection guard

Fig. 3.1 Example of a complete

measuring system

Rd 65 ×1/6“

AD-MI.CDR

DN 40

∅25

Required mounting clearance approx. 550

approx. 405

∅80

∅25

Manometer

∅42

PA441-03.CDR

Fig. 3.2 À

Mounting version:

Adapter DN 25

1 Splash protection cap

with cable entry

2 Protection sleeve

3 Connection for

compressed-air tube

ID 6 / OD 8

or ∅5 mm connection

forairpump,max.8bar

4 KCl refilling

5 Filling mark

6 Pressure vessel,

transparent

7 PM connection

8CouplingnutG1¼

Material:

1.4571 (SS 316Ti)

9 Built-in adapter,

straight or oblique

10 Electrode,

shaft length 225 mm

11 Protection guard

Mounting version:

Dairy fitting DN 40

1 Taper fitting

2 Coupling nut F 40,

DIN 11851

3 Electrode

4 Protection guard

Mounting version:

Varivent adapter

1 Clamp fitting

2 Electrode

AD-VV.CDR

48.2

∅75

∅24

∅71

∅84

Installation UniFit H CPA 441

6Endress+Hauser

3.3 Mounting positions and mounting versions

The UniFit H CPA 441 assembly is installed

with the selected adapter.

Note:

•The permissible range of mounting

positions comprises inclinations of

the central axis of the assembly

that do not fall below 15°from the

horizontal (see Fig. 3.3). Ensure

that the electrode contacts the

medium to be measured. With

inclined mounting, the change in

the usable electrolyte volume must

be considered (see chapter 3.5).

•The assembly must always be

installed in such a way that the

manometer and the compressed-air

connection are located at the

highest point and do not contact

the electrolyte. Select an installation

site that will allow easy removal of

the quick-release coupling and will

facilitate pressure readings. Ensure

adequate mounting clearances for

removal, installation, cleaning and

maintenance.

Built-in adapter

The UniFit H CPA 441 assembly is introduced

into the adapter –which may be welded on

or glued on –and hand-tightened with the

coupling nut. During installation, ensure that

the O-ring is properly seated and clean.

The sealing surface of the built-in adapter

must be protected against mechanical

damage. To permit use in food applications,

an Endress+Hauser built-in adapter should

be used (see Fig. 3.4 and Fig. 3.5).

However, adapters from other manufacturers

are basically usable as well. When installing

the assembly in built-in adapters of less than

50 mm in length, the O-ring must be inserted

in the second O-ring seat located further up.

You should therefore avoid using pointed or

sharp tools to change the O-rings.

Permissible

range

15°

PA441-EB.CDR

Impermissible

range

Fig. 3.3 Permissible mounting

positions for CPA 441

G 1¼

AD-25GV.CDR

∅42

Fig. 3.4 Built-in adapter, straight

AD-25SP.CDR

G 1¼

∅42

15°

Fig. 3.5 Built-in adapter, oblique

PA441E03.CHP

UniFit H CPA 441 Installation

Endress+Hauser 7

Varivent adapter and dairy fitting

The versions of the UniFit H CPA 441 with

Varivent adapter or dairy pipe fitting meet

the requirements of the corresponding DIN

standards, which must also be fulfilled by

the counterparts. Observe the relevant

regulations for installation. As a general rule,

always ensure that the sealing elements are

properly seated, clean and intact.

Protection guard

•The UniFit H CPA 441 assembly can be

equipped with a protection guard (see

Fig. 3.2) if desired.

•All versions are screwed in.

•Stainless steel versions are optionally

plugged in.

•With the protection guard screwed in,

even the stainless steel versions are no

longer suitable for food applications.

3.4 Installation or replacement of electrode

and mounting of measuring cable

pH/redox electrodes with a Pg 13.5 threaded

plug-in head, a shaft length of 225 mm and a

shaft diameter of 12 mm can be fitted into the

assembly.

The sealing of the electrode is provided

•at the threaded plug-in head by an O-ring

and a clamping ring

•at the lower shaft end via the O-ring in the

hole of the assembly.

Warning:

•Always depressurise the assembly

before removing the electrode

(see chapter 3.5.2).

•Electrolyte present in the electrolyte

vessel must be emptied out first,

or it drains from the assembly

through the built-in part.

•With installed assembly, by all

means note the medium pressure!

Note:

•Make the electrode slidable before

screwing in. Wetting with water is

sufficient.

•During electrode installation,

ensure that both O-rings are

properly seated and clean.

•The rubber hoses above the

electrode holes must be removed

prior to installation. No air bubbles

must be visible in the lower part of

the electrode shaft. Shake the

electrode several times if required.

•Should the assembly remain dry

for an extended period after

electrode installation, then the

electrode tip must be kept moist,

e.g. in KCl solution (3 mol/l).

Installation UniFit H CPA 441

8Endress+Hauser

➀Pull off the splash protection cap

and unscrew the protection sleeve. ➁Screw the electrode into the

electrode guide hand-tight and

then tighten it by a quarter turn

with a size 17 socket wrench.

➂Thread the measuring cable with

the electrode connector through

the protection sleeve.

➃Screw the electrode connector into

the threaded plug-in head on the

electrode.

➄Screw the protection sleeve back on. ➅Bend the measuring cable and

plug in the splash protection cap.

MOUNT01.CDR MOUNT02.CDR MOUNT03.CDR

MOUNT04.CDR MOUNT05.CDR MOUNT06.CDR

Fig. 3.6 Electrode installation and

mounting of measuring

cable

PA441E03.CHP

UniFit H CPA 441 Installation

Endress+Hauser 9

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