Endress+Hauser CCS120D Operating Manual

BA01950C/07/EN/02.19 71461435 2019-12-31

Products Solutions Services

Operating Instructions

CCS120D

Digital sensor with Memosens technology for determining total chlorine

CCS120D Table of contents

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

1.1 Warnings ........................... 4

1.2 Symbols used ........................ 4

2 Basic safety instructions ....... 6

2.1 Requirements for personnel ........... 6

2.2 Designated use ...................... 6

2.3 Workplace safety .................... 7

2.4 Operational safety ................... 7

2.5 Product safety ....................... 7

3 Product description ............. 8

3.1 Product design ....................... 8

4 Incoming acceptance and

product identification ......... 12

4.1 Incoming acceptance ................ 12

4.2 Product identification ................ 12

5 Installation .................... 14

5.1 Installation conditions ............... 14

5.2 Mounting the sensor ................ 16

5.3 Post-installation check ............... 22

10.3 Disposal ........................... 33

11 Accessories .................... 34

11.1 Device-specific accessories ............ 34

12 Technical data ................. 35

12.1 Input .............................. 35

12.2 Performance characteristics .......... 36

12.3 Environment ....................... 37

12.4 Process ............................ 37

12.5 Mechanical construction ............. 37

13 Installation and operation in

hazardous environment Class

I Div. 2 .......................... 38

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

6 Electrical connection .......... 22

6.1 Connecting the sensor ............... 23

6.2 Ensuring the degree of protection ..... 23

6.3 Post-connection check ............... 23

7 Commissioning ................ 24

7.1 Function check ..................... 24

7.2 Filling the membrane cap with

electrolyte ......................... 24

7.3 Sensor polarization .................. 24

7.4 Sensor calibration ................... 24

8 Diagnostics and

troubleshooting ............... 26

9 Maintenance .................. 28

9.1 Maintenance schedule ............... 28

9.2 Maintenance tasks .................. 28

10 Repair .......................... 33

10.1 Spare parts ........................ 33

10.2 Return ............................ 33

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About this document CCS120D

1 About this document

1.1 Warnings

Structure of information Meaning

DANGER

Causes (/consequences)

If necessary, Consequences of noncompliance (if applicable)

Corrective action

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WARNING

Causes (/consequences)

If necessary, Consequences of noncompliance (if applicable)

Corrective action

‣

CAUTION

Causes (/consequences)

If necessary, Consequences of noncompliance (if applicable)

Corrective action

‣

NOTICE

Cause/situation

If necessary, Consequences of noncompliance (if applicable)

Action/note

‣

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

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.

1.2 Symbols used

Symbol Meaning

Additional information, tips

Permitted or recommended

Not permitted or not recommended

Reference to device documentation

Reference to page

Reference to graphic

 Result of a step

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CCS120D About this document

1.2.1 Symbols on the device

Symbol Meaning

Reference to device documentation

Minimum immersion depth

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Basic safety instructions CCS120D

2 Basic safety instructions

2.1 Requirements for personnel

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 and

‣

must follow the instructions contained therein. Measuring point faults may be repaired only by authorized and specially trained personnel.

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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 Designated use

Drinking water and industrial water must be disinfected through the addition of appropriate disinfectants such as chlorine gas or inorganic chlorine compounds. The dosing quantity must be adapted to continuously fluctuating operating conditions. If the concentrations in the water are too low, this could jeopardize the effectiveness of the disinfection. On the other hand, concentrations which are too high can lead to signs of corrosion and have an adverse effect on taste, as well as generating unnecessary costs.

The sensor was specifically developed for this application and is designed for continuous measurement of total chlorine in water. In conjunction with measuring and control equipment, it allows optimal control of disinfection.

In this context, the following compounds are referred to collectively as total chlorine:

• Free available chlorine: hypochlorous acid (HOCl), hypochlorite ions (OCl-)

• Combined chlorine (chloramines)

• Organic combined chlorine, e. g. cyanuric acid derivatives Chloride (Cl-) is not recorded.

The sensor is not suitable for checking the absence of chlorine.

The sensor is particularly suitable for:

• Monitoring of total chlorine content in wastewater, industrial water, process water, cooling water and pool water

• Measurement, monitoring and control of total chlorine content in fresh water and seawater during the treatment of process water, swimming pool water and whirlpool bathwater

A typical application is the disinfection of wastewater, industrial, process and cooling water with disinfectants containing chlorine, particularly at higher pH values up to 9.5. In swimming pools, the CCS120D sensor is used in combination with the CCS51D sensor for free available chlorine to monitor the amount of combined chlorine (chloramines).

Use of the device for any purpose other than that described, poses a threat to the safety of people and of the entire measuring system and is therefore not permitted.

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CCS120D Basic safety instructions

The manufacturer is not liable for damage caused by improper or non-designated use.

2.2.1

‣

Hazardous environment in accordance with cCSAus NI Cl. I, Div. 2

Pay attention to the control drawing and the specified application conditions in the appendix of these Operating Instructions, and follow the instructions.

2.3 Workplace safety

As the user, you are responsible for complying with the following safety conditions:

• Installation guidelines

• Local standards and regulations

Electromagnetic compatibility

• The product has been tested for electromagnetic compatibility in accordance with the applicable international standards for industrial applications.

• The electromagnetic compatibility indicated applies only to a product that has been connected in accordance with these Operating Instructions.

2.4 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.

2.4.1 Special instructions

Do not operate the sensors under process conditions where it is expected that osmotic

‣

conditions will cause electrolyte components to pass through the membrane and into the process.

Use of the sensor for its intended purpose in liquids with a conductivity of at least 10 nS/cm can be classified as safe in terms of the application.

2.5 Product safety

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

1) Only if connected to CM44x(R)-CD*

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Product description CCS120D

3 Product description

3.1 Product design

The sensor consists of the following functional units:

• Membrane cap (measuring chamber with membrane)

• Separates the inner amperometric system from the medium

• With robust PET membrane and pressure relief valve

• Guarantees a defined and consistent electrolyte film between working electrode and membrane

• Sensor shaft with

• Large counter electrode

• Working electrode embedded in plastic

• Embedded temperature sensor

1 Memosens plug-in head 2 NPT ¾" thread 3 O-ring 4 Sensor shaft 5 Pressure relief valve (elastic) 6 Membrane cap 7 Sensor membrane

A0037693

 1 Sensor structure

3.1.1 Measuring principle

Total chlorine levels are determined in accordance with the amperometric measuring principle.

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CCS120D Product description

In this context, the following compounds are referred to collectively as total chlorine:

• Free available chlorine: hypochlorous acid (HOCl), hypochlorite ions (OCl-)

• Combined chlorine (chloramines)

• Organic combined chlorine, e.g. cyanuric acid derivatives Chloride (Cl-) is not recorded. The sensor is a membrane-covered, two-electrode sensor. A platinum working electrode is

used as the working electrode. A counter electrode coated in silver halide is used as the counter and reference electrode.

The membrane cap, which is filled with electrolyte, constitutes the measuring chamber. The measuring electrodes are immersed in the measuring chamber. The measuring chamber is separated from the medium by means of a microporous membrane. The chlorine compounds contained in the medium diffuse through the sensor membrane.

The constant polarization voltage present between the two electrodes causes the electrochemical reaction of the chlorine compounds at the working electrode. Electron donation at the working electrode and electron acceptance at the counter-electrode cause a current to flow. In the operational range of the sensor, this current flow is proportional to the chlorine concentration under constant conditions and is only slightly pH-dependent in the case of this sensor type. The transmitter uses the current signal to calculate the measured variable for concentration in mg/l (ppm).

3.1.2 Effects on the measured signal

pH value

pH dependency

The sensor is specified for the pH range of pH 5.5 to 9.5. The measuring signal is practically independent within this range. However, if the pH increases from pH 7 to pH 8 the measuring signal for free chlorine is reduced by 10 %.

Flow

The flow to the membrane-covered measuring cell should be at least 15 cm/s and maximum 50 cm/s. The optimum flow velocity is in the 20 to 30 cm/s range. When using the CCA250 flow assembly, the minimum flow velocity corresponds to a volume flow of 30 l/h (7.9 gal/h) (upper edge of float at the height of the red bar mark).

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Product description CCS120D

98,5

99,0

100,0

99,5

98,0 97,5

97,0

96,5

96,0

relative slope / maximum slope in %

CCA250 ﬂow gal/hr

ﬂow velocity at the membrane "/s

0 0.5 1 1.5 2 3

0 5 10 25 40

2.5

30 35

A0039131-EN

 2 Correlation between slope of electrode and flow velocity at the membrane/volume flow in

assembly

At higher flow rates, the measured signal is virtually flow-independent. However, if the flow rate falls below the specified value, the measured signal depends on the flow.

Temperature

Changes in the temperature of the medium affect the measured value:

• Increases in temperature result in a higher measured value (approx. 4 % per K)

• Decreases in temperature result in a lower measured value. Use of the sensor in combination with the Liquiline enables automatic temperature

compensation (ATC). Recalibration in the case of temperature changes is not necessary.

1. If automatic temperature compensation is disabled at the transmitter, the temperature must be maintained at a constant level following calibration.

2. Otherwise, recalibrate the sensor.

In the event of normal and slow changes in temperature (0.3 K / minute), the internal temperature sensor is sufficient. In the event of very rapid temperature fluctuations with high amplitude (2 K / minute), an external temperature sensor is necessary to ensure maximum accuracy.

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CCS120D Product description

Cross-sensitivities

Oxidants, such as bromine, iodine, ozone, chlorine dioxide, permanganate, peracetic acid and hydrogen peroxide result in higher readings than expected.

Reducing agents, such as sulfides, sulfites, thiosulfates and hydrazine, result in lower readings than expected.

2) The listed substances have been tested with different concentrations. An additive effect has not been investigated.

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Incoming acceptance and product identification CCS120D

4 Incoming acceptance and product identification

4.1 Incoming acceptance

1. 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 protected against 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.

4.2 Product identification

4.2.1 Nameplate

The nameplate provides you with the following information on your device:

• Manufacturer identification

• Extended order code

• Serial number

• Safety information and warnings

Compare the information on the nameplate with the order.

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4.2.2 Product page

www.endress.com/ccs120d

4.2.3 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 product

1. Go to www.endress.com.

2. Call up the site search (magnifying glass).

3. Enter a valid serial number.

4. Search.  The product structure is displayed in a popup window.

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CCS120D Incoming acceptance and product identification

5. Click on the product image in the popup window.  A new window (Device Viewer) opens. All of the information relating to your

device is displayed in this window as well as the product documentation.

4.2.4 Manufacturer address

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

4.2.5 Scope of delivery

The delivery comprises:

• Disinfection sensor (membrane-covered)

• Bottle with electrolyte (50 ml (1.69 fl.oz)) and nozzle

• Replacement membrane cap

• Operating Instructions

• Manufacturer's certificate

4.2.6 Certificates and approvals

 mark

Declaration of Conformity

The product meets the requirements of the harmonized European standards. As such, it complies with the legal specifications of the EU directives. The manufacturer confirms successful testing of the product by affixing to it the  mark.

EAC

The product has been certified according to guidelines TP TC 004/2011 and TP TC 020/2011 which apply in the European Economic Area (EEA). The EAC conformity mark is affixed to the product.

Ex approvals

cCSAus NI Cl. I, Div. 2

This product complies with the requirements defined in:

• UL 61010-1

• ANSI/ISA 12.12.01

• FM 3600

• FM 3611

• CSA C22.2 NO. 61010-1-12

• CSA C22.2 NO. 213-16

• Control drawing: 401204

3) Only if connected to CM44x(R)-CD*

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Installation CCS120D

15°

5 Installation

5.1 Installation conditions

5.1.1 Installation position

Do not install upside-down!

Install the sensor in an assembly, support or appropriate process connection at an angle of

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at least 15 ˚ to the horizontal. Other angles of inclination are not permitted.

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Follow the instructions for installing the sensor in the Operating Instructions of the

‣

assembly used.

A Permitted orientation B Incorrect orientation

A0037695

5.1.2 Immersion depth

At least 70 mm (2.76 in)

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