ABB AnalyzeIT 7600 Series Manual de usuario

AnalyzeIT

pH/ORP Electrode System

7600 Series

Instruction Manual

IM/7650_7

ABB

The Company

We are an established world force in the design and manufacture of instrumentation for industrial

process control, flow measurement, gas and liquid analysis and environmental applications.

As a part of ABB, a world leader in process automation technology, we offer customers

application expertise, service and support worldwide.

We are committed to teamwork, high quality manufacturing, advanced technology and unrivalled

service and support.

The quality, accuracy and performance of the Company’s products result from over 100 years

experience, combined with a continuous program of innovative design and development to

incorporate the latest technology.

The UKAS Calibration Laboratory No. 0255 is just one of the ten flow calibration plants operated

by the Company, and is indicative of our dedication to quality

and accuracy.

Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual

for any other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of the

Technical Publications Department.

Health and Safety

To ensure that our products are safe and without risk to health, the following points must be noted:

1. The relevant sections of these instructions must be read carefully before proceeding.

2. Warning labels on containers and packages must be observed.

3. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel and in accordance with the

information given.

4. Normal safety precautions must be taken to avoid the possibility of an accident occurring when operating in conditions of high pressure and/

or temperature.

5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry. Normal safe handling procedures

must be used.

6. When disposing of chemicals ensure that no two chemicals are mixed.

Safety advice concerning the use of the equipment described in this manual or any relevant hazard data sheets (where applicable) may be

obtained from the Company address on the back cover, together with servicing and spares information.

EN ISO 9001:2000

Cert. No. Q 05907

EN 29001 (ISO 9001)

Lenno, Italy – Cert. No. 9/90A

0255

Stonehouse, U.K.

CONTENTS

1 INTRODUCTION .................................................. 2

1.1 Schematic Diagrams ........................................ 2

2 PREPARATION .................................................... 3

2.1 Checking the Code Number ............................. 3

2.2 Identifying the Electrode Type .......................... 4

2.3 Checking the Cable Specification .................... 6

2.4 Cleaning Options .............................................. 6

3MECHANICAL INSTALLATION........................... 6

3.1 Siting ................................................................ 6

3.1.1 Operating Limits ................................. 6

3.1.2 Operating Pressure & Temperature ... 7

3.2 Installing the System ........................................ 7

3.2.1 Models 7651, 7652, 7660 and 7661 .. 7

3.2.2 Model 7652 ........................................ 8

3.2.3 Models 7654, 7655, 7656, 7664 and

7665 ................................................... 8

3.3 Fitting Electrodes – .......................................... 8

3.3.1 Removing the Sensor Holder ............. 8

3.3.2 Fitting the Reference Electrode ....... 10

3.3.3 Fitting the Measuring Electrode, and 10

the Temperature Compensator 1750-000 ... 10

3.3.4 Completion Tasks – Fig. 3.11 ........... 11

3.4 Fitting the Reservoir ....................................... 12

4ELECTRICAL INSTALLATION .......................... 13

4.1 Connection to 4500 and 4600 Series

Transmitters ................................................. 13

4.2 Connection to Hazardous Area Systems ....... 13

4.3 Cable Termination .......................................... 14

5CALIBRATING THE SYSTEM ........................... 15

6ROUTINE MAINTENANCE ................................ 16

6.1 ‘O’ Ring Seals................................................. 16

6.2 Cleaning ......................................................... 16

6.3 Checking the Electrolyte Level ....................... 16

6.4 Replacing Electrodes ..................................... 16

6.4.1 Measuring Electrodes ...................... 16

6.4.2 Reference Electrodes .................................. 17

6.5 Recommended Maintenance ......................... 17

of the Company’s pH Systems ............................... 17

6.6 Fault Finding .................................................. 17

6.7 Loss of Sample ................................................ 18

7SPARES ............................................................. 18

7.1 Models 7651, 7652 ......................................... 18

7.2 Models 7654, 7655, 7656 ............................... 18

7.3 Model 7660 (stainless steel) .......................... 18

7.4 Reservoir Spares ........................................... 18

8COSHH (VALID AS OF 1/10/93) ....................... 19

NOTES ..................................................................... 20

Section Page Section Page

1INTRODUCTION

Mains in

Relays

A – Dip System

Current Output

Relays

Current Output

Mains in

B – In-Line System

0.000

Dual Cond.

0.000

uS/cm

0.000

Dual Cond.

0.000

uS/cm

This manual describes how to install and operate 7600 Series

industrial electrode systems. These systems are suitable for use

with a variety of measuring electrodes and pH meters operating

over a wide range of pressures and temperatures.

This manual describes:

•Model 7651 – polypropylene with optional pipe and flange

fittings.

•Model 7660 – stainless steel, in-line flow system.

•Model 7661 – PVDF, 1 inch flow system.

•Model 7652 – polypropylene, 2 inch in-line system with 2 inch

BS10 Table E flange fittings.

•Model 7654 – polypropylene, 1 metre (nominal) dip system.

•Model 7664 – PVDF, 1 metre (nominal) dip system.

•Model 7655 – polypropylene, 2 metre (nominal) dip system.

•Model 7665 – PVDF, 2 metre (nominal) dip system,

•Model 7656 – polypropylene, 3 metre (nominal) dip system.

Dip systems are for use in tanks, channels, etc.

All the above models are compatible with the AX, 4500 and 4600

Series pH transmitters. They may also be used with other

instruments such as 9140, 9170 and 9180 Series, but care must

be taken when connecting the temperature compensator – see

Section 4.1 for further details.

An alternative range of systems is available for use in hazardous

areas using approved intrinsically safe transmitters – see Section

4.2.

1.1 Schematic Diagrams – Fig. 1.1

Fig. 1.1 Schematics Diagrams

2PREPARATION

A – 7651 (Polypropylene) B – 7660 (Stainless Steel) C – 7652 (Polypropylene)

E – 7661 (PVDF)

7654 7664

D – Polypropylene 7655 PVDF

7665 7656

2.1 Checking the Code Number – Fig. 2.1

Fig. 2.1 System Types

…2 PREPARATION

Fitted to all systems.

Fitted to all systems except when

model 1740 ( Redox - ORP ) is used or if

manual temperature compensation is used.

1750-000 Temperature Compensator

ASEABROWNBOVERI

1740-000 Platinum Metal Electrode

ASEABROWNBOVERI

1741-000 Antimony Metal Electrode

ASEABROWNBOVERI

1721-000 & 1723-000 Cone-shaped Electrodes

ASEABROWNBOVERI

1722-000 Low Resistance Electrode or

1724-000 High Temperature Electrode

ASEABROWNBOVERI

1720-000 General Purpose Electrode

ASEABROWNBOVERI

1730-000 Reference Electrode

ASEABROWNBOVERI

2.2 Identifying the Electrode Type –

Fig. 2.2 and Table 2.1

A pH system is only as accurate as the electrodes used to make

the measurement. To satisfy a wide range of applications, and to

meet the demands of modern processes, the Company has

produced a range of electrodes to satisfy most requirements.

Reference Electrode (1730-000) fitted to all systems – used in

a sealed electrolyte or reservoir fed system, e.g. for applications

where the conductivity of the water is less than 30 µScm-1.

General Purpose Electrode (1720-000) – suitable for most

industrial applications. Operates from 0 to 14 pH, 0 to 100°C (32 to

212 °F) and must be used when the mechanical wiper is fitted.

Low Resistance Electrode (1722-000) – low resistance

membrane electrode for low temperature, low conductivity

applications. For use in the water industry where the sample

temperature drops below 10°C (50°F). Operates from 0 to 10 pH,

0 to 70°C (32 to 158°F).

Note. For conductivities less than 30 µS cm-1 a

stainless steel system is recommended.

High Temperature Electrode (1724-000) – for use on high

temperature samples only (i.e. above 50°C (122°F)). The

maximum operating temperature is 140°C (284°F).

Cone Shaped Electrode (1721-000) – heavy duty electrode

designed specifically for ultrasonic cleaning. Operates from 0 to

14 pH, 0 to 100°C (32 to 212°F).

Low Temperature Cone Electrode (1723-000) – designed for

use with ultrasonic cleaner and especially where the sample is at

low conductivity/low temperature. Operates from 0 to 10 pH, 0 to

70°C (32 to 158°F).

Platinum Electrode for Redox (ORP), (1740-000) – platinum

electrode enables Redox (ORP) measurements to be made using

any of the electrode systems.

Antimony pH Electrode (1741-000) – designed to work in

applications when hydrofluoric acid is present.

Temperature Compensator (1750-000) – three-wire PT100

temperature compensator required to ensure high accuracy. It is

compatible with older generations of Company instruments as

well as the current models.

Note. All of these electrodes are compatible with the

AX, 4500 and 4600 Series, 9140, 9170 and 9180

Series transmitters.

Fig. 2.2 Electrode Models

metsySedortcelExodeR/HpseireS0067 67 XX/0XX

lairetaMdnaepyTmetsyS smetsySenelyporpyloP

htiwmetsyswolF

snoitcennocssecorpni1dnani

snoitcennocegnalfEelbaT01SBni2htiwmetsyswolF

)ni93(m1–metyspiD

)ni87(m2–metsyspiD

)ni811(m3–metsyspiD

metsySleetSsselniatS

htiwmetsyswolF

snoitcennocssecorpTPNni 06

smetsySFDVP

htiwmetsyswolF

snoitcennocssecorpni1dnani

)ni93(m1–metyspiD

)ni87(m2–metsyspiD

epyTdnahtgneLelbaCnoitcennoC noitasnepmoCerutarepmeTcitamotuAhtiW

elbacoN

htgnel)tf01(m3

htgnel)tf61(m5

htgnel)tf33(m01

htgnel)tf66(m02

htgnellaicepS

)PRO(xodeRroF

elbacoN

htgnel)tf01(m3

htgnel)tf61(m5

htgnel)tf33(m01

htgnel)tf66(m02

htgnellaicepS

sepyTrosneS rosnesoN 0

edortcelessalgesopruplla000-0271

edortceleecnereferdradnats000-0371

rotasnepmocerutarepmet001TP000-0571

retawetsaw/ssecorplairtsudnirofdednemmoceR

edortcelessalgecnatsiserwol000-2271

edortceleecnereferdradnats000-0371*

rotasnepmocerutarepmet001TP000-0571

sretawelbatoprofdednemmoceR

edortcelessalgdepahsenoc000-1271

edortceleecnereferdradnats000-0371

rotasnepmocerutarepmet001TP000-0571

snoitacilppalairtsudnirofrenaelccinosartluhtiwdesueboT

edortcelessalgdepahsenocecnatsiserwol000-3271

edortceleecnereferdradnats000-0371*

rotasnepmocerutarepmet001TP000-0571

yrassecensigninaelccinosartluerehwsretawelbatoprofdednemmoceR

)PRO/xodeR(edortcelemunitalP000-0471

edortceleecnereferdradnats000-0371

snoitacilppaPRO/xodeRroF

)Hp(edortceleynomitnA000-1471

edortceleecnereferdradnats000-0371

nitneserpsidicAciroulfordyHerehwsnoitacilppaHprofdednemmoceR

elpmaseht

edortcelessalgerutarepmethgih000-4271

edortceleecnereferdradnats000-0371

rotasnepmocerutarepmet001TP000-0571

snoitacilppaerutarepmethgihroF

2PREPARATION…

Note. For 1 metre and 2 metre

dip systems using mechanical or

ultrasonic cleaning, please refer

to separate specification sheet.

Note. For ultrasonic and

mechanical cleaning in Dip

systems, refer to the appropriate

manual for electrode details.

Note. For Intrinsically Safe

systems a maximum cable

length of 5 metres is permitted.

Note. For PVDF systems, only

options 1, 5 and 7 are available.

Table 2.1 Electrode Data

…2 PREPARATION 3MECHANICAL INSTALLATION

Red (Measuring Electrode)

Black (Reference Electrode)

A – Redox (ORP) and Manual

Temperature Compensated Systems

Blue

(Temp. Comp.)

B – pH Systems with Automatic

Temperature Compensation

Red

(Measuring Electrode)

Black

(Reference Electrode)

Used only on

4530/40 or 9180

(Cut back on other

instruments)

2.3 Checking the Cable Specification – Fig. 2.3

Check that cable length and termination is correct for the types

of electrode system being used – see Table 2.1 and Fig. 2.3.

2.4 Cleaning Options

The following methods of cleaning are available:

•Flow powered

•Ultrasonic

•Mechanical wiping

For assembly instructions refer to the appropriate instruction

manual (part no. IM/7600–CLN).

Caution.

•Ensure that the system cable is fed through the

electrode system cover (or dip tube) before the

cable is installed. To avoid the risk of damp or

corrosive air damaging the cable plugs, connect to

the electrodes as soon as possible.

•It is essential that fitted electrodes remain wet. If

there is loss of sample the fitted electrodes remain

serviceable while there is sample in the flowcell.

This may last for about a week depending on

prevailing climatic conditions. If it appears that

electrodes are drying out, periodically check and

top up the flowcell reservoir with clean water or

buffer solution.

3.1 Siting

3.1.1 Operating Limits

Model 7651 (Flow Type)see Fig. 3.1A for details

pH range: 0 to 14

Operating temperature range: 0 to 100°C (32 to 212°F)

Maximum operating temperature: 100°C at 2.1bar (212°F

at 30psi)

Maximum operating pressure

at 25°C (77°F): 10.6bar (150psi)

Model 7652 (In-line Type)see Fig. 3.1B for details

pH range: 0 to 14

Operating temperature range: 0 to 70°C (32 to 158°F)

Maximum operating temperature: 70°C (158°F), with no

pressure

Maximum operating pressure

at 25°C (77°F): 2.6bar (37psi)

Model 7654/5/6 (Dip Type)

pH range: 0 to 14

Operating temperature range: 0 to 80°C (32 to 176°F)

Maximum operating temperature: 80°C at 2.8bar (176°F

at 40psi)

Maximum operating pressure

at 25°C (77°F): 2.8bar (40psi)

Model 7660 (Flow Type)

pH range: 0 to 14

Operating temperature range: 0 to 100°C (32 to 212°F)

Maximum operating temperature: 100°C at 2.1bar (212°F

at 30psi)

Maximum operating pressure 0.3bar (5psi)

at 25°C (77°F):

Model 7661 (Flow Type)see Fig. 3.1C for details

pH range: 0 to 14 (0 to 11 at elevated

temperatures)

Operating temperature range: 0 to 110°C (32 to 230°F)

Maximum operating temperature: 110°C at 1.7bar (230°F

at 25psi)

Maximum operating pressure

at 25°C (77°F): 6.6bar (95psi)

Model 7664/5 (Dip Type)

pH range: 0 to 14

Operating temperature range: 0 to 110°C (32 to 230°F)

Fig. 2.3 Cable Termination – Electrode Connections

3MECHANICAL INSTALLATION…

in NPT

Female

Thread

112 mm

65 mm

approx.

A – Type 7651

B–Type 7660

174 mm (6

in)

235 mm (9

in approx)

44 mm (1

in)

1in BSPT

Female

Thread

Optional 1in. Nom.

Bore Pipe Flanges

Drilled to BS10

Table E

in BSPT or

NPT Female

Thread

Bosses M10 x 1.5

Internal Thread

Top Cover

274 mm (10

in)

Allow about 150 mm free space above the

top cover for access and removal of the cover.

44 mm (1

in)

Bosses M10 x 1.5

Internal Thread

250 mm (10 in approx)

110

100

020 40 60 80 100

Temperature T/C

Pressure/

(psi)

Pressure/

(bar)

02040

60 80 100

Temperature T/C

Pressure/

(psi)

Pressure/

(bar)

160

140

120

100

02040

60 80 100

Temperature T/C

Pressure/

(psi)

Pressure/

(bar)

B – Model 7652

A – Models 7660 & 7651

C – Model 7661

Maximum operating temperature: 110°C (230°F) 3.1.2 Operating Pressure & Temperature – Fig. 3.1

3.2 Installing the System

3.2.1 Models 7651, 7652, 7660 and 7661 – Figs. 3.2 & 3.5

These may be mounted in any convenient position for the pipe

connections, using flexible or rigid piping. Allow sufficient space

above the system to enable the top cap to be unscrewed and

removed and for the entire electrode holder unit to be removed

from the flowcell for calibration.

The flowcell on Models 7651, 7660 and 7661 is provided with two

threaded fixing holes to support the electrode system from a

convenient vertical surface – see Figs. 3.2 and 3.5. Also, a plastic-

coated bracket (7600 960) is supplied to enable the system to be

mounted on a wall (when it is not possible to fit bolts from the back

of the system). This bracket has an overall dimension of 164 x

60mm (61/2x 23/8in) diameter on fixing centres 140 x 40mm (51/2x

19/16 in), symmetrically spaced, or with two bolts 12mm (1/2in)

diameter on fixing centres 140mm (51/2in) apart.

Fig. 3.1 Operating Temperatures and Pressures Fig. 3.2 Mounting, Types 7651 and 7660

Adjustable flanges to various standard drilling configurations are

also available to mount dip models close to a closed tank wall.

Note. Flanges available are very diverse. Please

consult the sales office for details.

…3 MECHANICAL INSTALLATION

1000 mm (39

in) or 2000 mm (79

in) 117 mm (4

in)

75 mm (3 in)

71.5 mm

Dia

in)

35 mm

in)

50.8 mm

(2 in)

25 mm

(1in)

44 mm

in)

64 mm

in)

79 mm

(31/8in)

102 mm

(4 in)

4 Holes 8.0mm Dia (

in)

WALL MOUNTING CLAMP

pt. no. 7604 440

One clamp for 1 metre models,

two clamps for 2 and 3 metre

models. Maximum immersion depth

203 mm (8 in)

93 mm (3

in)

52 mm (2

in)

George Fischer

Flange Adaptor

Pt No.735-810-108

Two Fixing Holes

M10 x 1.5 on

44 mm (1

in)

Centres

70 mm (2

in)

222 mm (8

in)

Allow about 150 mm (6 in)

free space above the top

cover for access and

removal of the cover.

2 in Flange BS 10 Table E

152 mm (6 in)

198.5 mm (713/16 in)

222 mm (83/4in)

Allow about 150 mm (6 in)

free space above the top

cover for access and

removal of the cover.

3.2.2 Model 7652 – Fig. 3.3

This is installed and held in position by the 2 in BS10 Table E fixing

flange only.

3.2.3 Models 7654, 7655, 7656, 7664 and 7665 – Fig. 3.4

These are dip systems installed in any convenient position over

the open tank or channel.

3.3 Fitting Electrodes –

Figs. 3.6, 3.7, 3.8, 3.9 and 3.10

Note.

•Ensure that the system cable is fed through the

electrode system cover or dip tube, as applicable,

before the cable is connected.

•Secure the cable in its permanent position,

ensuring sufficient free cable at both ends for

connection to the electrodes and to the meter.

Caution. To avoid the risk of damp or corrosive air

damaging the cable plugs, connect to the electrodes

as soon as possible.

3.3.1 Removing the Sensor Holder

Note. Reservoir-fed systems: only follow instructions

with respect to Flow/In-Line systems, then refer to

Section 3.4 to fit the reservoir assembly.

Fig. 3.3 Mounting, Type 7652

Fig. 3.4 Mounting, Types 7654, 7655, 7656,7664 and 7665

Fig. 3.5 Mounting, Type 7661

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