Endress+Hauser Memosens CFS51 User manual

Products Solutions Services
Operating Instructions
Memosens CFS51
Sensor for fluorescence measurement
BA02165C/07/EN/02.22-00
71572450
2022-05-18

Memosens CFS51 Table of contents
Endress+Hauser 3
Table of contents
1 About this document ................ 4
1.1 Warnings ............................ 4
1.2 Symbols used .......................... 4
1.3 Documentation ........................ 4
2 Basic safety instructions ............ 5
2.1 Requirements for the personnel ............ 5
2.2 Intended use .......................... 5
2.3 Workplace safety ....................... 5
2.4 Operational safety ...................... 6
2.5 Product safety ......................... 6
3 Product description ................. 7
3.1 Product design ......................... 7
4 Incoming acceptance and product
identification ....................... 8
4.1 Incoming acceptance .................... 8
4.2 Product identification .................... 8
4.3 Scope of delivery ....................... 9
5 Mounting ......................... 10
5.1 Mounting requirements ................. 10
5.2 Mounting the device ................... 14
5.3 Post-mounting check ................... 21
6 Electrical connection .............. 22
6.1 Connecting the sensor .................. 22
6.2 Ensuring the degree of protection .......... 23
6.3 Post-connection check .................. 24
7 Commissioning .................... 25
7.1 Preliminaries ......................... 25
8 Operation ......................... 26
8.1 Adapting the measuring device to the process
conditions ........................... 26
9 Diagnostics and troubleshooting ... 34
9.1 General troubleshooting ................. 34
10 Maintenance ...................... 35
10.1 Maintenance tasks ..................... 35
11 Repair ............................ 38
11.1 General information ................... 38
11.2 Spare parts .......................... 38
11.3 Return .............................. 38
11.4 Disposal ............................ 38
12 Accessories ....................... 39
12.1 Device-specific accessories ............... 39
13 Technical data .................... 40
13.1 Input ............................... 40
13.2 Performance characteristics .............. 40
13.3 Environment ......................... 40
13.4 Process ............................. 41
13.5 Mechanical construction ................ 41
Index .................................. 42

About this document Memosens CFS51
4 Endress+Hauser
1 About this document
1.1 Warnings
Structure of information Meaning
LDANGER
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation will result in a fatal or serious
injury.
LWARNING
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation can result in a fatal or serious
injury.
LCAUTION
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid this situation can result in minor or more serious injuries.
NOTICE
Cause/situation
If necessary, Consequences of
non-compliance (if applicable)
‣Action/note
This symbol alerts you to situations which may result in damage to
property.
1.2 Symbols used
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
1.2.1 Symbols on the device
Reference to device documentation
Do not dispose of products bearing this marking as unsorted municipal waste. Instead, return them
to the manufacturer for disposal under the applicable conditions.
Optical radiation warning
1.3 Documentation
The following manuals which complement these Operating Instructions can be found on
the product pages on the Internet:
• Technical Information of the sensor
• Operating Instructions for the transmitter used

Memosens CFS51 Basic safety instructions
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2 Basic safety instructions
2.1 Requirements for the 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.
• Faults at the measuring point may only be rectified by authorized and specially trained
personnel.
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 Intended use
The sensor is used to measure polycyclic aromatic hydrocarbons PAHs (PAH) using
fluorescence measurement.
The device is suitable for the following field of application:
Monitoring of scrubber washwater on ships
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.
The manufacturer is not liable for damage caused by improper or non-designated use.
2.3 Workplace safety
LWARNING
UV radiation from this product
Can cause damage to the eyes and skin!
‣Avoid any exposure of the eyes and skin to the unshielded product.
‣When the sensor is switched on, avoid looking directly into the sensor window without
appropriate eye protection. The exposure limits according to IEC 62471:2008 are not
exceeded within the first 100 seconds.
‣Appropriate protective goggles must be worn to protect against UV radiation.
‣Cover the light source when performing maintenance tasks that do not need UV light.
• The risk to the observer depends on how the user installs and uses the sensor.
• The sensor's lamp radiates light in the 254 nm wavelength range (UV radiation). The
sensor's lamp is categorized as Risk Group 3 according to EN/IEC 62471.
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.

Basic safety instructions Memosens CFS51
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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.
2.5 Product safety
2.5.1 State-of-the-art technology
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.

Memosens CFS51 Product description
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3 Product description
3.1 Product design
The device can be operated directly in the process, without any additional sampling (in-
line).
The device consists of the following assemblies:
• Power supply
• Light source
• Detectors
Detectors detect the measuring signals, digitize them and process them to form a
measured value.
• Sensor microcontroller
This is responsible for controlling internal processes and transmitting data.
All the data - including the calibration data - are stored in the device. The device can be
used at a measuring point and is either precalibrated or externally calibrated. The device
can also be used for several measuring points with different calibrations.
12
A0046290
 1 Sensor
1 Optical window
2 Sensor
3.1.1 Measuring principle
Fluorescence measurement is used to demonstrate the presence of polycyclic aromatic
hydrocarbons PAHs (PAH) in water. The device stimulates the PAHs with UV light and
detects the fluorescent radiation emitted by the PAHs as a result. The PAH concentration
is measured in units of phenanthrene equivalents (PAHphe) according to MEPC.259(68)
and MEPC.340(77) 1). The measurement is performed in the excitation wavelength range
of 254 nm and in the reception wavelength range up to 360 nm.
1) Marine Environment Protection Committee

Incoming acceptance and product identification Memosens CFS51
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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.
4.2.2 Product identification
Product page
www.endress.com/cfs51
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. Page search (magnifying glass symbol): Enter valid serial number.
3. Search (magnifying glass).
 The product structure is displayed in a popup window.
4. Click the product overview.
 A new window opens. Here you fill information pertaining to your device,
including the product documentation.

Memosens CFS51 Incoming acceptance and product identification
Endress+Hauser 9
4.2.3 Manufacturer address
Endress+Hauser Conducta GmbH+Co. KG
Dieselstraße 24
D-70839 Gerlingen
4.3 Scope of delivery
The scope of delivery comprises:
• Sensor, version as ordered
• Operating Instructions

Mounting Memosens CFS51
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5 Mounting
5.1 Mounting requirements
5.1.1 Dimensions
Ø 40 (1.6)
G1"
326.4 (12.9)
NPT 3/4"
80.9 (3.2)
245.5 (9.7)
A0046278
 2 Dimensions of sensor. Engineering unit: mm
(in)
Ø 40 (1.6)
G1"
326.4 (12.9)
NPT 3/4"
80.9 (3.2)
245.5 (9.7)
40 (1.6)
55 (2.2)
A0048128
 3 Dimensions of sensor with clamping ring.
Engineering unit: mm (in)
175.4 (6.9)
80 (3.2)
56 (2.2)
72 (2.8)
A0046891
 4 Dimensions of assembly with securing plate (right). Engineering unit: mm (in)

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x
x
y
98 (4)
A0046892
 5 Dimensions of mounted sensor with assembly. Engineering unit: mm (in)
x Variable length (depending on mounting)
y Variable angle (depending on mounting)
36 (1.4)
A0047395
 6 Dimensions of ring clip with spacer. Engineering unit: mm (in)

Mounting Memosens CFS51
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Ø55 (2.2)
Ø40 (1.6)
45 (1.8)
A0046812
 7 Dimensions of solid state reference. Engineering unit: mm (in)
5.1.2 Installation instructions
Installation in flow assembly
122
A0048127
 8 Installation markings for clamping ring
1 Vertical alignment line for solid state reference
2 Horizontal alignment lines for clamping ring
The vertical alignment line on the sensor is used to align the solid state reference. The
horizontal alignment lines on the sensor indicate the exact positions where the upper and
lower end of the clamping ring must be located.
Securing the clamping ring on the sensor
Proceed as follows if the clamping ring is not pre-installed on the sensor or if the clamping
ring needs to be reassembled after disassembly:
1. Clean the surfaces on the sensor and clamping ring and remove any grease.

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2.
12
A0048146
1 Optical window
2 Joint of the clamping ring
Slide the clamping ring through the sensor from below.
3. Align the joint of the clamping ring perpendicularly to the optical window of the
sensor.
4. Slide the clamping ring exactly onto the horizontal alignment lines.
5. Using the enclosed M5 screw, secure the clamping ring with a torque of 5 Nm.
Installation without flow assembly
80 (3.15)
A0049306
 9 Positioning the sensor. Dimensions: mm (in)
Please note the following when installing the sensor without a flow assembly:
• The immersion depth of the sensor must be selected in such a way that the optical
window of the sensor is always fully immersed in the medium.
• The distance to the bottom of the vessel must be at least 80 mm (3.15 in).
5.1.3 Orientation
The angle of inclination of the sensor can affect the formation of air bubbles below the
sensor. The greater the angle of inclination of the sensor, the more insensitive the
measurement is to air bubbles.
‣Adjust the angle of inclination if many air bubbles form →  13.
Setting the angle of inclination of the sensor
Depending on the measuring point, the angle of inclination for the sensor can be set
individually. The angle of inclination is determined by the location of the spacer on the
panel →  5,  11.

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1. Put the spacer in the desired location.
 The angle of inclination of the sensor changes.
2. Fix the spacer on the panel →  17.
10°
1
A0046899
 10 Example with spacer mounted at top, 10° angle
in relation to panel
1 Ring clip with spacer
15°
1
A0046900
 11 Example with spacer mounted at bottom, 15°
angle in relation to panel
1 Ring clip with spacer
5.2 Mounting the device
5.2.1 Measuring system
The sensor is secured to a panel with the assembly.
A complete measuring system comprises:
• Sensor
• Liquiline CM44x multi-channel transmitter
• Flow assembly

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1
2
3
4
5
6
A0046358
 12 Measuring system
1 Transmitter
2 Panel
3 Fixed cable
4 Sensor
5 Ring clip/spacer
6 Assembly
Assembly
The assembly has the following structure:

Mounting Memosens CFS51
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1
2
3
4
5
6
7
A0046861
 13 Flow assembly
1 Hose bracket (anti-bend protection)
2 Spacer
3 Ring clip
4 Hose connection, outlet
5 Flow assembly
6 Hose connection, inlet
7 Connection for cleaning (optional)
If possible, the measuring system setup should be free of air bubbles →  13. The
assembly offers an integrated bubble trap for assistance. This works best at flow rates of at
least 100 l/h (26.4 gal/h).
5.2.2 Mounting the assembly on the panel
12
1
A0047708
 14 Rear view of assembly
1 Boreholes for M5 screws (not included in the scope of delivery)
2 Securing plate
1. Hold the securing plate of the assembly up at the point where the assembly is to be
fixed.
2. If necessary, release the assembly from the securing plate before mounting.
3. Mark the 4 boreholes on the panel. In doing so, pay attention to the dimensions
→  10.
4. Drill the holes.

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5. Fix the securing plate with the 4 M5 screws in a cross-wise sequence.
5.2.3 Mounting the spacer on the panel
The spacer, together with the ring clip, are used to secure the sensor. The spacer must be
mounted at the level of the sensor housing.
1. Hold the spacer up at the mounting point above the assembly. In doing so, pay
attention to the dimensions →  5,  11.
2. Mark the 2 boreholes on the panel. In doing so, pay attention to the dimensions
→  11.
3. Drill the holes.
4.
A0048147
Fix the spacer on the panel with 2 M5 screws.
5.2.4 Mounting the sensor with the assembly
The sensor can be installed in the assembly both with the pre-installed clamping ring and
without the installed clamping ring.
Preparatory steps for the sensor with the installed clamping ring:
1.
12
A0048148
1 Union nut
2 Ring clip
Slide the union nut onto the sensor from above (over the fixed cable).
2. Slide the ring clip onto the sensor from above (over the fixed cable).

Mounting Memosens CFS51
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Preparatory steps for the sensor without an installed clamping ring:
1.
12
A0048476
1 Union nut
2 Ring clip
Slide the ring clip onto the sensor from below.
2. Slide the union nut onto the sensor from below.
3.
12
A0048477
1 Clamping ring
2 Alignment lines
Slide the clamping ring onto the sensor.
4. Make sure that the joint of the clamping ring is perpendicular to the optical window.
5. Position the clamping ring on the alignment lines of the sensor →  10.

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6.
A0048478
Using the M5 screw, tighten the clamping ring with a torque of 5 Nm.
Mounting the sensor with the assembly
1.
A0048247
Slide the sensor into the assembly as far as the clamping ring.

Mounting Memosens CFS51
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2.
1
2
A0048149
Connect the ring clip to the mounted spacer.
3. Use the enclosed M5 screw to fix the ring clip and the spacer.
4. Slide the union nut down as far as the edge of the assembly.
5. Tighten the union nut.
5.2.5 Mounting the cleaning connection
The use of the cleaning connection is optional.
2
1
A0048290
 15 Preparing the cleaning connection
1 Screw plug
2 O-ring
2
1
3
4
A0048291
 16 Mounting the cleaning connection
1 Check valve
2 Nipple
3 Angle connection
4 Hose connection
1. Loosen the lock screw.
2. Remove the lock screw and O-ring →  15,  20.
3. Fit the hose connection on the opening of the cleaning connection and secure it
→  16,  20.