ABB 4670 Series User manual

Turbidity Systems
4670 Series
User Guide
IM/4670_13

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 NAMAS 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.
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.
Electrical Safety
This instrument complies with the requirements of CEI/IEC 61010-1:2001-2 'Safety Requirements for Electrical Equipment for
Measurement, Control and Laboratory Use'. If the instrument is used in a manner NOT specified by the Company, the protection
provided by the instrument may be impaired.
Symbols
One or more of the following symbols may appear on the instrument labelling:
Warning – Refer to the manual for instructions
Caution – Risk of electric shock
Protective earth (ground) terminal
Earth (ground) terminal
Direct current supply only
Alternating current supply only
Both direct and alternating current supply
The equipment is protected
through double insulation
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.
BS EN ISO 9001:1994
Cert. No. Q05907
EN 29001 (ISO 9001)
Lenno, Italy – Cert. No. 9/90A
0255
Stonehouse, U.K.

1
CONTENTS
1TURBIDITY MEASUREMENT SYSTEMS .................... 2
1.1 Introduction ........................................................ 2
1.2 Turbidity Measurement Systems ........................ 3
2MECHANICAL INSTALLATION .................................... 5
2.1 Siting Requirements ........................................... 5
2.1.1 Analyzer ................................................ 5
2.1.2 Sensor Unit (Models 7997 200 Series
and 7997 300 only) ............................... 5
2.2 Mounting the Transmitter Unit ............................ 6
2.2.1 Wall-mounted Instrument ..................... 6
2.2.2 Panel-mounted Instrument ................... 7
2.3 Installing the Turbidity Sensor Unit...................... 8
2.3.1 7997 201 and 7997 202 ....................... 9
2.3.2 7997 200 Series and 7997 300 ............ 9
2.3.3 7997 400 Series ................................... 9
2.3.4 7997 450 Series ................................... 9
2.3.5 Flow Unit Dimensions ........................... 9
2.3.6 Mounting the Sensor ............................ 9
2.3.7 Mounting the De-bubbler .................... 11
2.3.8 Set Up Procedure for
Optional De-bubbler ........................... 11
3ELECTRICAL CONNECTIONS ................................ 12
3.1 Access to Terminals ......................................... 12
3.1.1 Wall-mounted Instrument ................... 12
3.1.2 Panel-mounted Instrument ................. 12
3.2 Connections, General ....................................... 13
3.2.1 Relay Contact Protection and
Interference Suppression .................... 13
3.3 Wall-mounted Instrument Connections ............ 14
3.4 Panel-Mounted Instrument Connections .......... 15
3.5 Selecting the Mains Voltage ............................. 16
3.5.1 Wall-mounted Instrument ................... 16
3.5.2 Panel-mounted Instrument ................. 16
3.6 Turbidity Unit Connection Box .......................... 17
3.7 Connections for 7997 450 Series ..................... 17
4CONTROLS AND DISPLAYS ..................................... 18
4.1 Displays ............................................................ 18
4.2 Control Familiarization ...................................... 18
5START UP AND OPERATION .................................... 19
5.1 Instrument Start-up .......................................... 19
5.2 Operation – Turbidity Measurement Mode........ 19
5.2.1 Operating Page .................................. 19
5.2.2 Calibration Page ................................. 20
6PROGRAMMING & ELECTRICAL CALIBRATION .... 22
6.1 Access to Secure Parameters .......................... 23
6.2 Language Page ................................................ 23
6.3 Set Up Parameter Page ................................... 23
6.4 Set Up Outputs Page ....................................... 25
6.5 Electrical Calibration ......................................... 27
6.5.1 Equipment Required ........................... 27
6.6 Preparation ....................................................... 27
6.7 Electrical Calibration Page ................................ 28
7MAINTENANCE .......................................................... 29
7.1 Scheduled Maintenance ................................... 29
7.1.1 Sensor Cleaning ................................. 29
7.1.2 Calibration .......................................... 29
7.1.3 Using Dry Calibration Standards ......... 29
7.2 Calibration Checks ........................................... 30
7.2.1 Procedure ........................................... 30
7.3 Using Formazine Standard Solution ................. 32
7.3.1 Preparing the Formazine Standard
for Wet Calibration .............................. 32
7.4 Unscheduled Maintenance ............................... 33
7.4.1 Transmitter Diagnostic messages ....... 33
7.4.2 Unstable or Erratic Readings .............. 33
7.4.3 Intermittent Short Term Spikes
in Turbidity Readings .......................... 34
7.4.4 Care and Maintenance
of Dry Calibration Standards ............... 34
7.4.5 Determination of the Dry Standard
Value for the 7997 300 and
400 Series Sensors ............................ 34
7.4.6 Converting 7997 202 Sensor
to 7997 201 Sensor
(with Integral Cleaning) ........................ 34
8SPECIFICATION ......................................................... 35
9SPARES ...................................................................... 38
9.1 Model 7997 200 Series .................................... 38
9.2 Model 7997 300 ............................................... 38
9.3 Model 7997 400 Series .................................... 39
9.4 Calibration Standards ....................................... 39
9.5 De-bubbler ....................................................... 39
APPENDIX A ....................................................................... 40
A1 Principle of Operation ....................................... 40
A1.1 Nephelometric .................................... 40
A1.2 Absorption .......................................... 40
A1.3 Calibration .......................................... 40
APPENDIX B ....................................................................... 41
B1 Determination of the Correction Factor ............ 41
B1.1 Definition ............................................. 41
B1.2 Method ............................................... 41
APPENDIX C ....................................................................... 42
C1 7997 100 Sensors ............................................ 42
C1.1 Description ......................................... 42
C1.2 Flow Unit Dimensions ......................... 42
C1.3 Wall-mounted Instrument
Connections ....................................... 43
C1.4 Panel-mounted Instrument
Connections ....................................... 44
C1.5 Turbidity Unit Connection Box ............ 45
C1.6 Maintenance ....................................... 46
C1.7 Spares ................................................ 46
C1.8 Specification ....................................... 46

2
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y02x7640027997cirtemolehpeNwolFUTN52ot0UTN052ot0
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)renaelcon( UTN1ot0UTN03ot0
y03x7640037997noitprosbAwolFUTF001ot0UTF005ot0
y04x7640047997noitprosbApiDm1UTF001ot0UTF0002ot0
y14x7641047997noitprosbApiDm2UTF001ot0UTF0002ot0
y54x7645047997noitprosbAwolFUTF001ot0UTF0002ot0
:setoN :gnitnuomrettimsnartehtsetonedxllaw=0
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1TURBIDITY MEASUREMENT SYSTEMS
1.1 Introduction
An ABB Turbidity System comprises a 4670 wall-mounted, or
4675 panel-mounted, analyzer, together with one of five sensor
models 7997 200 to 7997 405.
The analyzer provides the operator interface and
communications to other devices.
The signal from the sensing system is converted by the analyzer,
and the information is presented on a large, custom-designed,
easy-to-read, backlit liquid crystal display (LCD).
The analyzers can be programmed to work with any of the 7997
sensors, and the operating range can also be configured to
meet users' requirements.
Available in a wall-mount or 1/4DIN panel-mount version, the
analyzer is protected to IP66, ensuring reliable operation in the
most demanding situations. The same level of protection is
maintained during programming and calibration.
Details of the individual sensors are given in Table 1.1 below:
Table 1.1 Coding System

3
7997 300 7997 300
4670 30y System 4675 30y System
4675 500
4670 500
4670 20y & 21y Systems
7997 200 & 201
4670 500
4670 22y System
7997 202 4670 500
4675 20y & 21y Systems
4675 500
7997 200 & 201
4675 22y System
4675 500
7997 202
1MEASUREMENT SYSTEMS...
1.2 Turbidity Measurement Systems – Figs. 1.1A and 1.1B
Fig. 1.1A. System Arrangements (with 200 and 300 Series Sensors)

4
4675 500
4670 40y Series Systems 4675 40y Series Systems
4670 500
7997 400
Series 7997 400
Series
4675 500
4670 45y Series Systems 4675 45y Series Systems
4670 500
7997 450
Series
7997 450
Series
…1 MEASUREMENT SYSTEMS
...1.2 Turbidity Measurement Systems – Figs. 1.1A and 1.1B
Fig. 1.1B. System Arrangements (with 400 and 405 Sensors)

5
Turbidity
Sensor Unit
IP66
C – Within Environmental Limits
55C
Max.
–20C
Min.
B – Within Temperature Limits
Maximum Distance
100 meters
A – Maximum Distance of Instrument to Unit
2MECHANICAL INSTALLATION
2.1 Siting Requirements
2.1.1 Analyzer – Fig. 2.1
Caution.
•Mount in a location free from excessive vibration.
•Mount away from harmful vapors and dripping fluids.
Information. It is preferable to mount the instrument at eye
level, allowing an unrestricted view of the front panel
displays and controls
2.1.2 Sensor Unit – Fig. 1.1A
(Models 7997 200 Series and 7997 300 only)
For easy removal of sensor unit for maintenance if required,
allow sufficient clearance of 200 mm (7.9 in.) all around – see
Section 2.3.1 for overall dimensions of units.
Note. For ease of use it is recommended that the maximum
height of the sensor unit above floor level should not exceed
chest level. This ensures ease of access during calibration
and cleaning procedures.
Fig. 2.1 Siting Requirements – Instrument

6
Mark fixing centres
(see Fig. 2.2)
Drill suitable
holes
Fix instrument to wall using
suitable fixings
1
2
3
Position 'U' bolts on pipe
Position plates over 'U' bolts
Secure transmitter to mounting plate
Secure plates
1
2
3
4
A – Wall-mounting B – Pipe-mounting
68 (2.68)
214
(8.43)
232
(9.13)
Fixing Centres
160 (6.3)
250
(9.84)
69 (2.72)
Fixing Centres
Allowance for
Cable Bends
200 (7.9)
42
(1.65)
61 (2
3
/
8
) O.D. Vertical or Horizontal Post
Dimensions in mm (in.)
…2 MECHANICAL INSTALLATION
2.2 Mounting the Transmitter Unit
2.2.1 Wall-mounted Instrument – Figs. 2.2 and 2.3
Fig. 2.2 Overall Dimensions
Fig. 2.3 Wall/Pipe-mounting

7
Panel Cut-out
+0.8
–0
92 (3.62 )
+0.03
–0
+0.8
–0
92
(3.62 )
+0.03
–0
191 (7.52)
12 (0.47)
96 (3.78)
96
(3.78)
Dimensions in mm (in.)
Cut a hole in the panel (see Fig. 2.4 for dimensions).
Instruments may be close stacked to DIN 43835.
Insert the instrument into the
panel cut-out.
Refit the panel clamps to the case, ensuring that the
panel clamp anchors are located correctly in their slot.
Secure the instrument by tightening the
panel clamp retaining screws – see
Caution below.
Loosen the retaining screw
on each panel clamp.
Remove the panel clamp and anchors
from the instrument case.
1
2
3
4
5
6
3
2MECHANICAL INSTALLATION…
2.2.2 Panel-mounted Instrument – Figs. 2.4 and 2.5
Caution. The clamp must fit flat on the instrument casing. If
the clamp is bowed, the securing screw is overtight and
sealing problems may occur.
Fig. 2.4 Overall Dimensions
Fig. 2.5 Panel Mounting

8
Blanking Plug
7997 300
Flow-chamber
Optical
Receiver
Optical
Emitter
Wiper
Unit
Drain
Valve
Inlet/Isolating
Valve
7997 202
Optical
Emitter
Optical
Receiver
Flow-chamber
Drain
Valve
Inlet/Isolating
Valve
7997 200 & 201
Wiper
Unit
Optical
Emitter
Optical
Receiver
Flow-chamber
Drain
Valve
Inlet/Isolating
Valve
Clamping Ring
Sensor
Flowcell
7997 400
Dip Tube
Dip Sensor
Wiper
Optical
Emitter
Optical
Receiver
(hidden)
7997 405
…2 MECHANICAL INSTALLATION
2.3 Installing the Turbidity Sensor Unit – Table 1.1 and Fig. 2.6
Systems and sensors are shown in Table 1.1. The main components of each unit are identified in Fig. 2.7.
Fig. 2.6 Main Components

9
118
Six holes 7
for mounting
155.5
46.5
Sample outlet,
see Fig. 2.8
for location.
Sample inlet
(12 mm i.d. flexible
hose connection).
Drain
(12 mm i.d. flexible
hose connection).
Sample Outlet
Connector
for 6 mm i.d.
Tube Located
Behind the
Sensor Body
ledoMthgieHhtdiWhtpeD
002/7997mm0.004mm5.492mm0.923
003/7997mm0.004mm5.492mm0.061
004/7997mm5.39mm0.28mm5.212
054/7997 mm003.xorppa
ees( etoN )woleb mm0.531mm0.531
.etoN mm03yletamixorppa+dnalgelbacehtrofmm03+mm042
.tekcarbehtrof
2MECHANICAL INSTALLATION…
2.3.1 7997 201 and 7997 202
These sensors are designed to operate at very low turbidity
values of less than 0.1 NTU. At these values it is most important
that additional sources of light scattering, such as gas bubbles in
the sample, are eliminated. In this case an optional debubbler
(part number 7997 500) is available to eliminate the effect of gas
bubbles.
2.3.2 7997 200 Series and 7997 300
The flowrate should be maintained at a reasonable level (i.e.
0.5 l min-1) to prevent possible solids settling out in the
pipework. If this becomes a problem higher flowrates may be
required. The maximum flow rate of 6.0 l min-1 should not be
exceeded.
2.3.3 7997 400 Series
The dip sensor should be mounted in a position where a
representative sample is always monitored (i.e. not in an obscure
corner away from the main flow path). The dip tube should not
be totally submerged, but the sensor assembly at the end of the
dip tube must always be in the sample despite any change in
liquid level, to enable a correct turbidity measurement to be
achieved.
In applications with excessive flowrate, the sensor should be
mounted with the arrow on the top of the dip tube, in line with the
direction of flow – see Fig. 2.6.
2.3.4 7997 450 Series
The flowrate should be maintained at a reasonable level (i.e.
0.5 l min-1) to prevent possible solids settling out in the
pipework. If this becomes a problem higher flowrates may be
required. The maximum flow rate of 6.0 l min-1 should not be
exceeded.
2.3.5 Flow Unit Dimensions – Table 2.1
2.3.6 Mounting the Sensor – Figs. 2.7 (7997 200
and 300 Series), 2.8 (7997 200 Series), 2.9 (7997
300), 2.10 (7997 400 Series) and 2.11 (7997 450)
Mount the sensor in the attitude shown in the appropriate
illustration using the bracket(s) provided, where required.
Connect the sample and drain tubes.
Important Note. Mount units within 5of their vertical axes.
Fig. 2.7 Models 7997 200 Series and 300 (viewed from
the side) Location of Sample Outlet Connector
Table 2.1 Overall Dimensions in mm
Fig. 2.8 Model 7997 200 Series Mounting Information

10
56
1000
(2000)
93.5
82 15
25
40 max.
30 min.
using M6
Dimensions
in mm
212.5
70
Optical Emitter/Wiper
Cable to Transmitter
via Junction Box
118mm CRS
240mm
1
/ 2 in BSP
Connections
Mounting
Bracket
Sensor
Clamping
Ring
30mm
Approx.
135mm
2 holes
7mm Dia.
…2 MECHANICAL INSTALLATION
...2.3.6 Mounting the Sensor – Figs. 2.8 (7997 200
Series), 2.9 (7997 300), 2.10 (7997 400 Series) and 2.11
(7997 ?00)
118
Six holes 7
for mounting
155.5
46.5
Sample inlet
(12 mm i.d. flexible
hose connection).
Drain
(12 mm i.d. flexible
hose connection).
Sample outlet,
see Fig. 2.8
for location.
Fig. 2.10 Model 7997 400 Series Mounting Information
Fig. 2.9 Model 7997 300 Mounting Information
Fig. 2.12 Typical Installation
Fig. 2.11 Model 7997 405 Mounting Information
SR100 Recorder
Sample in
Sample out
Mains
Supply
Upstream
isolating valve –
not supplied
Output
4670
Transmitter
Flowcell
Mounting Bracket
Tundish
Minimise height
to avoid
syphoning effect

11
150 CRS
Removable fitting
To Fit 12 mm i.d. Tube
88
Ø6.5
Sample Outlet
Disconnect
Fittings
to suit 12 mm
i.d. tube
(rotatable
through 360
 )
540
91
Important Note.
The de-bubbler MUST
be mounted vertically with
the flow upwards.
Sample Inlet
Drain Outlet
4670
Tundish
Valve (A)
= Optional
(7997 201
Systems)
Important Note
The de-bubbler MUST be mounted
vertically with the flow upwards.
Minimise height
to avoid syphoning
effect
Tundish
Minimise height
to avoid syphoning
effect
Note. Sample regulating valves together with a flow
indicator are recommended to ensure easy maintenance
and consistent performance. These devices are not
supplied with the 7997 Turbidity Monitoring system.
Valve (B)
Flow Regulator Valve
Caution.
To prevent degassing of the sample, which can cause
very erratic readings, it is recommended that these
measurements be not greater than 150mm.
.
Caution.
To ensure adequate flowrate through the
sensor, it is recommended that the De-bubbler
unit is installed at least 0.5m above the sensor
outlet. This may need to be increased where
long or smalll bore tubing is used.
4675
Sample in
Flow Regulator
Valve
De-bubbler
Drain
Outlet
Inlet/Isolating
Valve
Drain
7997 200 Series Sample Outlet
Connector
2MECHANICAL INSTALLATION
2.3.7 Mounting the De-bubbler – Fig. 2.13
For use with the Model 7997 201.
2.3.8 Set Up Procedure for Optional De-bubbler –
Fig. 2.14
With a system which includes a de-bubbler, set it up as follows:
1) Open the 'sample in' isolating valve (A) such that the
overflow from the de-bubbler is at a minimum.
2) Adjust the sample flow through the turbidity system using the
regulating valve (B).
Fig. 2.14 Typical System Installation for 7997 200 Series and 7997 300 Flow Systems
Fig. 2.13 De-Bubbler Mounting Information
(Debubbler Part Number 7997 500)

12
1
2
3
4
2
Earth Studs
slide
down
Pull out
slightly. . .
. . . and
slide off
Remove
protection
cover
Slacken
captive
screws
Remove nuts and
protection cover
Remove
mains cover
Mains Cover
1
2
3ELECTRICAL CONNECTIONS
Warning.
•Although certain instruments are fitted with internal fuse protection, a suitably rated external protection device, e.g. fuse or
miniature circuit breaker (m.c.b.), must also be fitted by the installer.
•Before making any connections, ensure that the power supply, any high voltage-operated control circuits and high common
mode voltage are switched off.
3.1 Access to Terminals
3.1.1 Wall-mounted Instrument – Fig. 3.1 3.1.2 Panel-mounted Instrument – Fig. 3.2
Fig. 3.1 Access to Terminals –
Wall-mounted Instruments
Fig. 3.2 Access to Terminals –
Panel-mounted Instruments

13
RC
Load
LN
External
AC supply
Relay ContactsNC C NO
Load
+–
External
DC supply
Relay Contacts
A – AC Applications B – DC Applications
NC C NO
Diode
3ELECTRICAL CONNECTIONS…
3.2 Connections, General
Warning. The power supply earth (ground) must be connected to ensure safety to personnel, reduction of the effects of RFI and
correct operation of the power supply interference filter.
Information.
•Earthing (grounding) – stud terminal(s) is fitted to the transmitter case for bus-bar earth (ground) connection – see Fig. 3.1
or 3.5.
•Cable lengths – The cable length between the turbidity sensor unit and the electronics unit is provided as ordered, and
terminated at the sensor unit. The cable can be shortened or lengthened as appropriate to the installation.
•Cable routing – always route the signal cable and mains-carrying/relay cables separately, ideally in earthed (grounded) metal
conduit.
Ensure that the cables enter the transmitter through the glands nearest the appropriate screw terminals and are short and
direct. Do not tuck excess cable into the terminal compartment.
•Cable glands & conduit fittings – ensure a moisture-tight fit when using cable glands, conduit fittings and blanking plugs/
bungs (M20 holes). The M16 glands ready-fitted to wall-mounted instruments accept cable of between 4 and 7 mm diameter.
•Relays –the relay contacts are voltage-free and must be appropriately connected in series with the power supply and the
alarm/control device which they are to actuate. Ensure that the contact rating is not exceeded. Refer also to Section 3.2.1 for
relay contact protection details when the relays are to be used for switching loads.
•Retransmission output – Do not exceed the maximum load specification for the selected current retransmission range – see
SPECIFICATION, Section 8.
Since the retransmission output is isolated the –ve terminal must be connected to earth (ground) if connecting to the isolated
input of another device.
3.2.1 Relay Contact Protection and Interference Suppression – Fig. 3.3
If the relays are used to switch loads on and off, the relay contacts can become eroded due to arcing. Arcing also generates radio
frequency interference (RFI) which can result in instrument malfunction and incorrect readings. To minimize the effects of RFI, arc
suppression components are required; resistor/capacitor networks for AC applications or diodes for DC applications. These
components can be connected either across the load or directly across the relay contacts. On 4600 Series instruments the RFI
components must be fitted to the relay terminal block along with the supply and load wires – see Fig 3.3
For AC applications the value of the resistor/capacitor network depends on the load current and inductance that is switched. Initially,
fit a 100R/0.022 FRC suppressor unit (part no. B9303) as shown in Fig. 3.3A. If the instrument malfunctions (incorrect readings) or
resets (display shows 88888) the value of the RC network is too low for suppression – an alternative value must be used. If the correct
value cannot be obtained, contact the manufacturer of the switched device for details on the RC unit required.
For DC applications fit a diode as shown in Fig. 3.3B. For general applications use an IN5406 type ( 600 V peak inverse voltage at
3A – part no. B7363).
Note. For reliable switching the minimum voltage must be greater than 12 V and the minimum current greater than 100 mA.
Fig. 3.3 Relay Contact Protection

14
Mounting Terminal Number
Wall 1234567
Panel 12 11 10 9 8 7 6
Cleaner initiate
pulse
+12V
switched
emitter supply
+12V cleaner/
receiver
supply
Signal input Cleaner *
Detect signal 0V common
* Not used on 7997 400
* Link
Power
Supply
Retransmission Relay 1
Relay 2
Serial
Power
Supply
Retrans. Relay 1
Relay 2
12 34567 +– N L
12 3
45 6
12 3
45 6
1
2
3
4
5
6
–
–
–
–
–
–
NC
C
NO
NC
C
NO
Relay 1
Relay 2
or 'Failed Wiper' on
200 & 300 Series
Mains Supply
N
L
–
–
Neutral
Line
–Earth
Earth Stud (on case)
– see Fig. 3.1
(see Warning below)
NC
C
NO
Normally Closed
Common
Normally Open
=
=
1
2
3
4
5
6
–
–
–
–
–
–
Rx+
Rx–
Tx+
Tx–
0V
Output
+Retrans.
Output
Turbidity Sensors
7997 400 Series
1– White
2– Yellow
3– Red
4– Green
5– -
6– -
7– Blue
Turbidity Sensors
7997 200 Series,
7997 300
1– White
2– Yellow
3– Red
4– Green
5– Black
6– Blue
7–
Discard and insulate
unused BLACK wire in
multi-core cable
If 'Test Cleaner' is selected (Set Up Parameters Page), Relay 2 becomes 'Failed Wiper Alarm' relay
Earth Stud
(on case)
Braid
…3 ELECTRICAL CONNECTIONS
3.3 Wall-mounted Instrument Connections – Fig. 3.4 and Table 3.1
Note. Refer to Fig. 3.1 for Access to Terminals.
Caution. Slacken terminal screws fully before making connections.
Warning. The power supply earth (ground) must be connected to ensure safety to personnel, reduction of the
effects of RFI and correct operation of the power supply interference filter.
Fig. 3.4 Wall-mounted Instrument Connections
Table 3.1 4600 Series Transmitter Input Connections

15
1
2
3
4
5
6
7
8
9
E
N
L
1
2
3
4
5
6
7
8
9
10
11
12
Earth Stud 1
2
3
4
5
6
7
8
9
10
11
12
0V
Rx–
Rx+
Tx–
Tx+
Blue
Black
Green
Red
Yellow
White
RS485 Serial
Interface (If fitted)
Turbidity Unit
+
–
Normally Closed
Common
Normally Open
Normally Closed
Common
Normally Open
Neutral
Live
Earth
(see Warning below)
1
2
3
4
5
6
7
8
9
E
N
L
Mains Supply
Retransmission Output
Earth Stud (on case) Braid
Earth Stud (on case)
Relay 1
1
2
3
4
5
6
7
8
9
10
11
12
0V
Rx–
Rx+
Tx–
Tx+
Blue
Green
Red
Yellow
White
RS485 Serial
Interface (If fitted)
Turbidity Unit
Braid
Earth Stud (on case)
Discard and insulate
black wire in multicore
cable
4675 Panel Mounted Version for use with 7997 400
4675 Panel Mounted Version for use with 7997 200 Series and 300
1
2
3
4
5
6
7
8
9
E
N
L
1
2
3
4
5
6
7
8
9
10
11
12
Earth Stud
+
–
Normally Closed
Common
Normally Open
Normally Closed
Common
Normally Open
Neutral
Live
Earth
(see Warning below)
1
2
3
4
5
6
7
8
9
E
N
L
Mains Supply
Retransmission Output
Earth Stud (on case)
Relay 1
Relay 2
Relay 2
or 'Failed Wiper'
If 'Test Cleaner' is selected (Set Up Parameters Page), Relay 2 becomes 'Failed Wiper Alarm' relay
3ELECTRICAL CONNECTIONS…
3.4 Panel-Mounted Instrument Connections – Fig. 3.5 and Table 3.1
Note. Refer to Fig. 3.2 for Access to Terminals.
Important Note. To locate wires in the terminal blocks, slacken the terminal screws until full clearance is achieved.
Warning. The power supply earth (ground) must be connected to ensure safety to personnel, reduction of the
effects of RFI interference and correct operation of the power supply interference filter.
Fig. 3.5 Panel-mounted Instrument Connections

16
Remove cover (see Fig. 3.1)
Remove front
panel screws
Remove front
panel
Remove Cap
and Screw
Slacken
captive
screws and
remove
protection
cover
2
3
1
3
4
230
230
5
230 V AC
or
110 V AC
Undo captive
screw
Slide instrument
out of case
230
1
2
230
3
230 V AC
or
110 V AC
…3 ELECTRICAL CONNECTIONS
3.5 Selecting the Mains Voltage
3.5.1 Wall-mounted Instrument 3.5.2 Panel-mounted Instrument
Information. Use a small, flat-blade screwdriver to
remove the screw cap from the case.
Fig. 3.6 Selecting the Mains Voltage –
Wall-mounted Instrument
Fig. 3.7 Selecting the Mains Voltage –
Panel-mounted Instrument

17
B
G
R
Y
W
Scrn.
4675
Models 7997 200 Series and 7997 300
Yellow
Optical
Emitter
Screen
Braid
Yellow
Blue Green
Screen
Braid
Blue
Green
Blue
Red
Red
Screen link
To Tu rbidity Unit
To 4600
Series Unit
Wiper
Unit
Screen
Braid
Blue
Screen
Braid
Red
Green
White
Red
Optical Receiver
Black
3ELECTRICAL CONNECTIONS
Fig. 3.8 Turbidity Unit Connection Box
Fig. 3.9 Model 7997 400 Series Extension Cable Connection Box
Model 7997 400 Series
Note. On 7997 400 Series Models only,
the sensor is wired directly into the
transmitter.
Information. For applications where the
transmitter is sited more than five meters
from the dip system, an extension cable
is required – see Section 9.4 for the part
number of the cable. The maximum
length of cable is 100 meters. An IP65
rated, good quality junction box is also
required to make the connection.
The wire colors in the extension cable are
the same as those in the standard cable.
Make connections like to like, i.e. red to
red, etc. – see Fig. 3.9.
Information. If a longer cable to the 4600 Series unit
is to be fitted, remove the existing cable and replace it
making the appropriate connections shown here and
in Fig. 3.4 or 3.5. For model 7997 300, first remove
the receiver cap, to allow better access to the junction
box.
3.6 Turbidity Unit Connection Box – Fig. 3.8
3.7 Connections for 7997 450 Series
The 405 sensor comes with a 2m cable which connects in
accordance with Fig 3.8, except that there is no Black wire.

18
A – Advancing to Next Page
Parameter 1
Parameter 2
Parameter 3
Parameter 4
Page 1
Parameter 1
Parameter 2
Parameter 3
Page 2
Advance to
next page
For majority
of parameters
or
B – Moving Between Parameters
C – Adjusting and Storing a Parameter Value
New value is
automatically stored
Parameter Value
Adjust
D – Selecting and Storing a Parameter Choice
Parameter X
Y
Z
Select
Parameter 1
Parameter 2
Parameter 3
Page X
Parameter 4
Advance to
next parameter
or
New value is
automatically stored
or
5.00
Turbidity (NTU)
Alarm
LEDs
Upper
Display Line
Lower
Display Line
Membrane Keys
4CONTROLS AND DISPLAYS
4.1 Displays – Fig. 4.1
The display comprises a 5-digit, 7-segment digital upper display
line and a 16-character dot-matrix lower display line. The upper
display line shows actual values of turbidity, temperature, alarm
set points or programmable parameters. The lower display line
shows the associated units or programming information.
4.2 Control Familiarization
Fig. 4.1 Location of Controls and Displays
Fig. 4.2 Membrane Key Functions