Endress+Hauser Turbimax CUS52D User manual

Products Solutions Services
Operating Instructions
Turbimax CUS52D
Turbidity sensor
BA01275C/07/EN/06.20
71473306
2020-03-16

Turbimax CUS52D 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 Symbols on the device ................... 4
2 Basic safety instructions ............ 5
2.1 Requirements for personnel ............... 5
2.2 Designated 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
4.4 Certificates and approvals ................ 9
5 Installation ....................... 10
5.1 Installation conditions .................. 10
5.2 Mounting the sensor ................... 15
5.3 Post-installation check .................. 20
6 Electrical connection .............. 21
6.1 Connecting the sensor .................. 21
6.2 Ensuring the degree of protection .......... 22
6.3 Post-connection check .................. 22
7 Commissioning .................... 23
7.1 Function check ....................... 23
8 Operation ......................... 24
8.1 Adapting the measuring device to the process
conditions ........................... 24
9 Diagnostics and troubleshooting ... 35
9.1 General troubleshooting ................. 35
10 Maintenance ...................... 36
10.1 Maintenance tasks ..................... 36
11 Repair ............................ 37
11.1 General information ................... 37
11.2 Spare parts .......................... 37
11.3 Return .............................. 37
11.4 Disposal ............................ 37
12 Accessories ....................... 38
12.1 Assemblies .......................... 38
12.2 Holder .............................. 39
12.3 Mounting material ..................... 39
12.4 Compressed air cleaning ................ 39
12.5 Ultrasonic cleaning .................... 40
12.6 Bubble trap .......................... 40
12.7 Solid state reference ................... 41
12.8 Calibration vessel ...................... 41
13 Technical data .................... 42
13.1 Input ............................... 42
13.2 Performance characteristics .............. 42
13.3 Environment ......................... 43
13.4 Process ............................. 43
13.5 Mechanical construction ................ 44
Index .................................. 45

About this document Turbimax CUS52D
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
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
1.3 Symbols on the device
Symbol Meaning
Reference to device documentation

Turbimax CUS52D Basic safety instructions
Endress+Hauser 5
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.
• 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 Designated use
CUS52D is a sensor for measuring turbidity and low solids content in drinking water and
process water applications.
The sensor is particularly suited for use in the following applications:
• Final turbidity measurement in outlet of waterworks
• Turbidity measurement in inlet of waterworks
• Turbidity measurement at all process stages
• Turbidity measurement for filter monitoring and filter backwashing
• Turbidity measurement in drinking water networks
• Turbidity measurement in media with high salinity (plastic sensor only)
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
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 Turbimax CUS52D
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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.

Turbimax CUS52D Product description
Endress+Hauser 7
3 Product description
3.1 Product design
The sensor with the 40 mm (1.57 in) diameter can be operated directly and completely in
the process without the need for further sampling (in-situ).
The sensor includes all necessary modules:
• Power supply
• Light sources
• Detectors
Detectors record the measuring signals, digitize them and process them into a measured
value.
• Sensor microcontroller
This is responsible for controlling internal processes and transmitting data.
All data - including the calibration data - are stored in the sensor. The sensor can be
precalibrated and used at a measuring point, calibrated externally, or used for several
measuring points with different calibrations.
1
2
A0030692
 1 Arrangement of light source and light receiver
1 Light receiver
2 Light source
3.1.1 Measuring principle
The sensor works using the 90° light scattering principle in accordance with ISO 7027 and
meets all the requirements of this standard (no divergence and a maximum convergence
of 1.5°). The ISO 7027 standard is obligatory for turbidity measurements in the drinking
water sector.
90° ± 2.5°
20° - 30°
A0030701
 2 Measurement in accordance with ISO 7027
Measurement is done using a wavelength of 860 nm.

Incoming acceptance and product identification Turbimax CUS52D
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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
• Order code
• Extended order code
• Serial number
• Safety information and warnings
‣Compare the information on the nameplate with the order.
4.2.2 Product identification
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.
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.

Turbimax CUS52D Incoming acceptance and product identification
Endress+Hauser 9
4.2.3 Manufacturer's address
Endress+Hauser Conducta GmbH+Co. KG
Dieselstraße 24
D-70839 Gerlingen
4.3 Scope of delivery
The delivery comprises:
• 1 sensor, version as ordered
• 1 Operating Instructions BA01275C
4.4 Certificates and approvals
4.4.1 Electromagnetic compatibility
Interference emission and interference immunity as per
• EN 61326-1:2013
• EN 61326-2-3:2013
• NAMUR NE21: 2012
4.4.2  mark
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.
4.4.3 ISO 7027
The measurement method used in the sensor corresponds to the nephelometric turbidity
method according to ISO 7027-1:2016.
4.4.4 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.
4.4.5 Marine approvals
A selection of sensors have type approval for marine applications, issued by the following
classification societies: ABS (American Bureau of Shipping), BV (Bureau Veritas), DNV-GL
(Det Norske Veritas-Germanischer Lloyd) and LR (Lloyd’s Register). Details of the order
codes of the approved sensors, and the installation and ambient conditions, are provided in
the relevant certificates for marine applications on the product page on the Internet.

Installation Turbimax CUS52D
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5 Installation
5.1 Installation conditions
5.1.1 Dimensions
Plastic sensor
Ø 40
(1.57)
NPT ¾“
G1
237.5 (9.35) 82.7 (3.26)
2 (0.08)
20.5 (0.81)
18.5 (0.73) 12.5
(0.49)
13.5
(0.53)
20.5
(0.81)
15
(0.59)
A0042002
 3 Dimensions of plastic sensor. Dimensions: mm (in)

Turbimax CUS52D Installation
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Stainless steel sensor
Ø 40
(1.57)
NPT ¾“
G1
237.5 (9.35) 82.7 (3.26)
84.5 (3.33)
2 (0.08)
20.5 (0.81)
18.5 (0.73) 12.5
(0.49)
13.5
(0.53)
20.5
(0.81)
15
(0.59)
A0030699
 4 Dimensions of stainless steel sensor and stainless steel sensor with clamp connection (right). Dimensions:
mm (in)

Installation Turbimax CUS52D
12 Endress+Hauser
18.5 (0.73)
82.7 (3.26)
237.5(9.35)
(1.57)
Ø 40
12.5
(0.49)
20.5
(0.81)
13.5
(0.53)
NPT ¾“
G1
15 (0.59)
2 (0.08)
20.5 (0.81)
42.5
(1.67)
22.5 (0.89)
A0035857
 5 Dimensions of stainless steel sensor with standard Varivent connection (left) and extended shaft (right).
Dimensions: mm (in)
Compressed air cleaning
35.5 (1.40)
13 (0.51)
A0030691
 6 Dimensions of sensor with compressed air cleaning. Dimensions: mm (in)
Compressed air cleaning accessory →  39

Turbimax CUS52D Installation
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Solid state reference
45 (1.77)
58 (2.28)
60 (2.36)
43 (1.69)
86 (3.39)
30
(1.18)
Ø 40 (1.57)
9.5 (0.37)
A0030821
 7 Solid state reference Calkit CUS52D. Dimensions: mm (in)
5.1.2 Orientation in pipes
4
2
1
3
5
2
3
4
90°
A0030698
 8 Permitted and unacceptable orientations in pipes
• Install the sensor in places with consistent flow conditions.
• The best installation location is in the ascending pipe (item 1). Installation in the
horizontal pipe (item 4) is also possible.
• Do not install the sensor in places where air spaces or bubbles occur (item 3) or where
sedimentation may occur (item 2).
• Avoid installation in the down pipe (item 5).
• Avoid fittings downstream from pressure reduction stages which can lead to outgassing.
Wall effects
Backscattering on the pipe wall may result in the distortion of measured values in the case
of turbidity values < 200 FNU. Therefore a pipeline diameter of at least 100 mm (3.9 in) is
recommended for reflecting materials (e.g. stainless steel). An assembly adjustment onsite
is also recommended.

Installation Turbimax CUS52D
14 Endress+Hauser
Pipes made of stainless steel with diameter >DN 300 exhibit hardly any wall effects.
Black plastic pipes with diameter > DN 60 exhibit hardly any wall effects (<0.05 FNU). For
this reason, the use of black plastic pipes is recommended.
678
910
A0030704
 9 Orientations for pipes and assemblies
• Install the sensor in such a way that the light beam is not reflected →  9,  14 (item
6).
• Avoid sudden changes in cross-section (item 9). Changes in cross-section should be
gradual and located as far away as possible from the sensor (item 10).
• Do not install the sensor directly downstream from a bend (item 7). Instead position it as
far away as possible from the bend (item 8).
Installation marking
1
A0030820
 10 Installation marking for sensor alignment
1 Installation marking
The installation marking on the sensor is aligned opposite the optical system.
‣Align the sensor against the flow direction.

Turbimax CUS52D Installation
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5.2 Mounting the sensor
5.2.1 Measuring system
A complete measuring system comprises:
• Turbimax CUS52D turbidity sensor
• Liquiline CM44x multi-channel transmitter
• Assembly:
• CUA252 flow assembly (only possible for stainless steel sensor) or
• CUA262 flow assembly (only possible for stainless steel sensor) or
• Flexdip CYA112 assembly and Flexdip CYH112 holder or
• Retractable assembly, e.g. Cleanfit CUA451
• Or direct installation via pipe connection (only possible for stainless steel sensor)
• Clamp 2" or
• Varivent
123
4
A0030694
 11 Example of measuring system with CUA252 flow assembly, for stainless steel sensor
1 Liquiline CM44x multi-channel transmitter
2 Turbimax CUS52D turbidity sensor
3 CUA252 flow assembly
4 Direction of flow

Installation Turbimax CUS52D
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1
2
3
1
4
5
A0030696
 12 Example of measuring system with immersion assembly
1 Flexdip CYH112 holder
2 Liquiline CM44x multi-channel transmitter
3 Protective cover
4 Flexdip CYA112 assembly
5 Turbimax CUS52D turbidity sensor
This type of installation is particularly suitable for strong or turbulent flow
> 0.5 m/s (1.6 ft/s) in basins or channels.
5.2.2 Mounting options
Installing with CUA451 retractable assembly
2
A0022285
 13 Installing with CUA451 retractable assembly
The installation angle is 90°.
The arrow points in the direction of flow.
The optical windows in the sensor must be
aligned against the direction of flow.
The medium pressure may not exceed
2 bar (29 psi) for manual assembly
retraction.

Turbimax CUS52D Installation
Endress+Hauser 17
Installing with Flexdip CYA112 immersion assembly and Flexdip CYH112 holder
A0022033
 14 Installing with immersion assembly
The installation angle is 0°.
The arrow points in the direction of flow.
‣If the sensor is being used in open basins, install the sensor in such a way that air
bubbles cannot accumulate on it.
Installing with 2" clamp connection
A0022032
 15 Installing with 2" clamp connection
The installation angle is 90°.
The arrow points in the direction of flow.
The optical windows in the sensor must be
aligned against the direction of flow.
A weld-in adapter is available as an accessory for
the installation →  39.
60 ... 64
(2.36 ... 2.52)
> 100 (3.94)
36
(1.42)
A0030819
 16 Pipe connection with weld-in adapter. Dimensions: mm (in)

Installation Turbimax CUS52D
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Installing with CUA252 or CUA262 flow assembly
A0022034
 17 Installing with CUA252 flow assembly
The installation angle is 90°.
The arrow points in the direction of flow.
The optical windows in the sensor must be
aligned against the direction of flow.
A0022281
 18 Installing with CUA262 flow assembly
The installation angle is 90°.
The arrow points in the direction of flow.
The optical windows in the sensor must be
aligned against the direction of flow.
Installing in Varivent assemblies
A0031130
 19 Installing with standard Varivent connection
The installation angle is 90°.
The arrow points in the direction of
flow.
The optical windows in the sensor
must be aligned against the direction
of flow.
A0031132
 20 Installing with Varivent connection with extended
shaft

Turbimax CUS52D Installation
Endress+Hauser 19
Installation with CUA252 flow assembly and bubble trap
1
2
3
4
5
6
7
8
9
10
A0035917
 21 Connection example with bubble trap and CUA252 flow assembly
1 Inlet from below
2 Shut-off valve
3 Bubble trap
4 Venting of bubble trap (included in scope of delivery)
5 Shut-off valve (throttle for increasing pressure)
6 Outlet
7 D 12 adapter with connection for vent pipe (included in scope of delivery)
8 CUA252 flow assembly
9 CUS52D turbidity sensor
10 D 12 adapter
For detailed information on installing the assembly and the bubble trap, see
BA01281C

Installation Turbimax CUS52D
20 Endress+Hauser
Compressed air cleaning
1
2
3
A0030785
 22 Installation markings 1 to 3
20°
A0030786
 23 Mounting position
Mount the compressed air cleaning system as follows:
1. Fit the compressed air cleaning system on the sensor (→  23).
2. Position the securing ring for the compressed air cleaning system between
installation marks 2 and 3 (→  22).
3. Using a 4 mm (0.16 in) Allen key, tighten the securing screw of the compressed air
cleaning system slightly so that the compressed air cleaning system can still be
rotated.
4. Turn the compressed air cleaning system so that the slit on the black ring is on
installation mark 1 (→  22).
 This way the nozzle is offset by 20° when blowing air at the optical windows.
5. Tighten the securing screw.
6. Fit the compressed air hose on the hose connection.
5.3 Post-installation check
Put the sensor into operation only if the following questions can be answered with "yes":
• Are the sensor and cable undamaged?
• Is the orientation correct?
• Has the sensor been installed in the process connection, and does not suspend freely
from the cable?