Endress+Hauser Liquisys CUM 252 Manuel utilisateur

BA 174C/07/en/01.98

No. 50088699

Software version 1.0 or later

liquisys

CUM 252

Transmitter

for Turbidity and

Solids Content

Operating Instructions

Hauser

Endress

Nothing beats know-how

Please familiarise yourself with the instrument before you

take any other steps:

General information

Safety

Description

You wish to install and start up the instrument.

The required steps are described in these chapters:

Installation First start-up

You wish to operate or reconfigure the instrument.

The operating concept is explained in these chapters:

Operation

Instrument configuration

Need help with problems or maintenance?

Diagnostics

Maintenance and service

See the back cover for a fold-out overview

of the menu structure.

Table of contents

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

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

1.2 Conformity statement ........................................2

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Intended use .............................................3

2.2 General safety notes .........................................3

2.3 Safety devices ............................................3

3 Instrument description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1 Areas of application .........................................4

3.2 Measuring system ..........................................4

3.3 Essential features ..........................................5

3.4 Instrument variants ..........................................6

3.5 Accessories .............................................7

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Storage and transport ........................................8

4.2 Unpacking ..............................................8

4.3 Mounting...............................................9

4.4 Connection ............................................ 11

4.5 Packaging and disposal ...................................... 13

5 First start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.1 Operator interface ......................................... 16

6.2 Display elements .......................................... 16

6.3 Keyfunctions ........................................... 18

6.4 Operating concept ......................................... 19

6.5 Operation example ........................................ 21

6.6 Auto / manual operating mode .................................. 23

7 Instrument configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7.1 Measuring point configuration .................................. 25

7.2 Limit contactor configuration , ................................... 27

7.3 Current output range selection .................................. 29

7.4 General instrument configuration ................................. 30

7.5 Calibration adaptation ...................................... 32

7.6 3-point calibration of transmitter ................................. 34

7.7 Calibration result data ....................................... 38

8 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.1 Limitalarm............................................. 40

8.2 Errors ................................................ 40

8.3 Possible faults in measuring mode and elimination ....................... 42

9 Maintenance and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9.1 Cleaning.............................................. 43

9.2 Repair ............................................... 43

10 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

10.1 Technical data ........................................... 44

10.2 Index ................................................ 47

liquisys CUM 252 Table of contents

Endress+Hauser 1

1 General information

1.1 Symbols used

Warning:

This symbol alerts to hazards which may cause serious injuries as well as damage to

the instrument, measuring system or other equipment if ignored.

Caution:

This symbol alerts to possible malfunction due to operator error.

Note:

This symbol indicates important items of information.

1.2 Conformity statement

The Liquisys CUM 252 measuring transmitter has been developed and manufactured in

accordance with the applicable European standards and directives.

Note:

The corresponding certificate of conformity may

be requested from Endress+Hauser.

General information liquisys CUM 252

2 Endress+Hauser

2 Safety

2.1 Intended use

The measuring transmitter Liquisys CUM 252 is a field-tested and reliable measurement device

for determining turbidity or solids concentration. It is equipped with two current outputs and two

switched outputs for connection to automated process controllers.

2.2 General safety notes

Warning:

Operation of the device in a manner other than as described in these operating

instructions may lead to unsafe and improper functioning of the measuring system.

Installation, start-up, operation

The Liquisys CUM 252 instrument has been designed for safe operation according to the state

of the art in engineering and in keeping with the applicable regulations and EC directives; see

“Technical data”. However, if used improperly or other than for the intended purpose, it may

pose a hazard, e.g. due to improper connection.

Installation, electrical connection, start-up, operation and maintenance of the measuring system

must therefore be performed exclusively by trained specialists authorised by the system

operator. This personnel must have read and understood these operating instructions and must

adhere to them.

2.3 Safety devices

●Access code:

Unauthorised access to the calibration and configuration data of the measuring transmitter is

effectively prevented by access codes. The instrument settings can be read at any time

without entry of an access code.

●Alarm function:

Continuous violation of the limit settings, sensor failure or process-related problems will

activate an alarm. This condition is indicated by an LED on the control panel and via a

switched output. The alarm contact has been designed as a fail-safe switch, i.e. the alarm

condition will be immediately signalled in case of a power failure (requires two separate

current supply circuits). The alarm contact is also activated by internal system errors (see 8.2).

●Data protection:

The instrument configuration is retained even after a power failure.

●Immunity to interference:

This instrument is protected against interference, such as pulse-shaped transients, high

frequency and electrostatic discharges, according to the applicable European standards.

This is, however, only the case for instruments connected as outlined in these operating

instructions.

liquisys CUM 252 Safety

Endress+Hauser 3

3 Instrument description

3.1 Areas of application

The measuring transmitter Liquisys CUM 252 is an excellent choice for measuring and control

tasks in the following areas of application:

●Sewage treatment plants, solids concentration measurement

●Effluent treatment

●Water treatment and water monitoring

●Drinking water

●Surface water (rivers, lakes, dams, ocean)

●Service water

●Indirect discharge

●Water recycling

3.2 Measuring system

UM252SYS.CDR

Universal

suspension

assembly

CYH 101

Sensor

CUS 31, CUS 41

Liquisys CUM 252

2 limit contacts

1 alarm contact

Current output 1: TU

0/4 ... 20 mA

Auxiliary power

supply (15 V)

HOLD

Power (mains)

Current output 2: temp.*

0/4 ... 20 mA

Fig. 3.1 Example of a complete measuring system

* optional

Instrument description liquisys CUM 252

4 Endress+Hauser

A typical measuring system comprises:

●a CUS 31 or CUS 41 sensor with an integrated temperature sensor

●an appropriate immersion, flow or retractable assembly

●an extension cable (shielded standard cable / 2 ×2 wires, twisted pair) with junction box VBM

if necessary

●the Liquisys CUM 252 measuring transmitter

3.3 Essential features

●Field housing with protection type IP 65

●Measuring ranges 0 ... 9999 FNU, 0 ... 3000/9999 ppm, 0 ... 3/300 g/l, 0 ... 200%

(depending on sensor and sample)

●Temperature measuring range –5.0 ... + 70.0 °C

●Easy to read, two-line display

●Simple configuration with only three keys

●Configuration protected by access code

●Quick calibration using the “CAL”key

●Two switched outputs which can be configured as limit contacts

●One contact which can be configured as a spray cleaning contact

●One switched output for alarm signalling in cases of limit violation

●Two current outputs with selectable measurement range, switchable between 0 ... 20 or

4 ... 20 mA proportional (switching affects both outputs)

●Automatic “hold”function to “freeze”the current outputs and switched outputs during

calibration, configuration and cleaning

●“Hold”function can be controlled via a galvanically separated input using an external or

internal auxiliary voltage

●Interference-free communication with the sensor via digital interface

●Wiper control via digital interface

liquisys CUM 252 Instrument description

Endress+Hauser 5

3.4 Instrument variants

You can identify the device variant and the

mains supply type by the order code on the

nameplate of the instrument.

Order code

Version / measuring range

TU Turbidity / solids content measuring transmitter

in PC/ABS protection housing, 247 ×170 ×115 mm (H ×W ×D),

2-line display, protection type IP 65

Application units FNU, ppm, g/l and % or % DM

Power supply

0 Power supply: 230 V AC

1 Power supply: 115 V AC

2 Power supply: 200 V AC

3 Power supply: 24 V AC

5 Power supply: 100 V AC

8 Power supply: 24 V DC

9 Special version to customer specifications

Measurement output

0 Meas. output: turbidity / solids content (DM)

1 Meas. output: turbidity / solids content and temperature

9 Special version to customer specifications

Additional features

10 Base version

20 Moisture protection lacquering

99 Special version to customer specifications

UM252TYP.TIF

Fig. 3.2 Nameplate of Liquisys CUM 252

Instrument description liquisys CUM 252

6 Endress+Hauser

3.5 Accessories

Sensor

Type Features Areas of application

CUS 31 Scattered light sensor in all-plastic housing

with sapphire windows and perm. attached

cable, cable length optionally 7 or 15 m,

prot. type IP 68, with integrated temp. sensor

Drinking water,

surface water,

service water,

waste treatment effluent

CUS 41 Scattered light sensor in all-plastic housing

with sapphire windows and perm. attached

cable, cable length optionally 7 or 15 m,

prot. type IP 68, with integrated temp. sensor

Solids concentr. meas. in

–sewage treatment plants

–sedimentation

–water conditioning

Assemblies

Type Features Areas of application

CYH 101 Universal suspension assembly holder Installation for immersed

operation, e.g. in activated

sludge basins

CYA 611 Immersion assembly

CUA 250 Flow assembly Installation for

flow operation

CUA 461 Retractable assembly

Installation for

in-line operation, e.g.

in pipelines or

on tank walls

Cleaning system

Type Features Areas of application

Chemoclean

CYR 20

Program sequencer for automatic control of

cleaning cycles, user-definable weekly

program, hold output

For use with heavily soiled

media

Chemoclean

CYR 10

Injector with drive water and cleaning agent

valves

Chemoclean

CUR 4

Spray head for CUS 31, CUS 41 also in

conjunction with suspension or immersion

assembly CYH 101 for ½" hose connection,

material: PVC

Spray clean.

system for

CYA 611

Spray cleaning set for immersion assembly

CYA 611, D16 pressure hose bush connection

liquisys CUM 252 Instrument description

Endress+Hauser 7

4 Installation

4.1 Storage and transport

The packaging material used to store or transport the instrument must provide shock and

moisture protection. Optimal protection is provided by the original packaging materials.

Conformance with the ambient conditions (see “Technical data”) must be assured.

4.2 Unpacking

Verify that the contents are undamaged. Inform the post office or freight carrier as well as the

supplier of any damage.

Check that the delivery is complete and agrees with the shipping documents and your order:

●Quantity delivered

●Instrument type and version according to the nameplate (see chapter 3.4)

●Accessories

●Operating instructions

Included in delivery:

●1 set of plug-in screw terminals

●1×cable gland Pg 7

●1×cable gland Pg 16 reduced

●2×cable gland Pg 13.5

The cable gland openings in the housing have not been punctured. Puncture only the

openings needed and leave the cover in place when making the openings to keep the housing

as stable as possible.

The post mounting kit is not included in the delivery.

Save the original packaging in case the device must be stored or shipped at a later time.

If you have any questions, please consult your supplier or the Endress+Hauser sales office in

your area (see back cover of these operating instructions for addresses).

Installation liquisys CUM 252

8 Endress+Hauser

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