Endress+Hauser CUS52D Specifications
TI01136C/07/EN/05.20
71473307
2020-03-16
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Solutions Services
Technical Information
Turbimax CUS52D
Turbidity sensor
Application
Turbimax CUS52D is a sensor for measuring turbidity and low solids content in
drinking water and process water applications.
• Turbidity measurement at all stages of the water treatment process
• Final turbidity measurement in outlet of waterworks
• Turbidity measurement in inlet of waterworks
• Turbidity measurement for filter monitoring and filter backwashing
• Turbidity measurement in drinking water networks
• Turbidity measurement in saline media (plastic sensor only)
Your benefits
• Turbidity measurement in accordance with ISO 7027
• The hygienic design with the 2" clamp means it can be mounted directly in pipes
and fits into CUA252 (PE 100) and CUA262 (stainless steel) flow assemblies
• Immersion version can be installed in open channels and basins
• Can be used at high temperatures and high pressures
• Standardized communication (Memosens technology) enables "plug and play"
• Intelligent sensor - all characteristics and calibration values are stored in the
sensor
• Customer calibrations with 1 to 6 points can be performed in the lab or at place of
installation
• Completely safe, as the optical source requires little power to operate
Table of contents
Turbimax CUS52D
Function and system design ................... 3
Measuring principle ............................ 3
Measuring system ............................. 4
Communication and data processing ................. 6
Dependability ................................ 7
Input ..................................... 7
Measured variable ............................. 7
Measuring range .............................. 7
Power supply .............................. 7
Electrical connection ........................... 7
Performance characteristics ................... 9
Reference operating conditions .................... 9
Maximum measured error ....................... 9
Repeatability ................................ 9
Long-term reliability ........................... 9
Response time ............................... 9
Detection limit ............................... 9
Installation ................................ 9
Orientation ................................. 9
Environment .............................. 13
Ambient temperature range ..................... 13
Storage temperature .......................... 13
Degree of protection .......................... 13
Electromagnetic compatibility (EMC) ............... 13
Mounting material ........................... 19
Compressed air cleaning ........................ 20
Ultrasonic cleaning ........................... 20
Bubble trap ................................ 21
Solid state reference .......................... 21
Calibration vessel ............................ 21
Process .................................. 13
Process temperature range ...................... 13
Process pressure range ......................... 13
Flow limit ................................. 13
Mechanical construction .................... 14
Dimensions ................................ 14
Weight ................................... 17
Materials .................................. 17
Process connections ........................... 17
Certificates and approvals ................... 18
mark ................................... 18
ISO 7027 .................................. 18
EAC ..................................... 18
Marine approvals ............................ 18
Ordering information ....................... 18
Scope of delivery ............................. 18
Product page ............................... 18
Product Configurator .......................... 18
Accessories ............................... 18
Assemblies ................................. 18
Holder .................................... 19
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Turbimax CUS52D
90° ± 2.5°
20° - 30°
Function and system design
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.
A0030701
1 Measurement in accordance with ISO 7027
Measurement is done using a wavelength of 860 nm.
Sensor monitoring
The optical signals are continuously monitored and analyzed for plausibility. If inconsistencies occur,
an error message is output via the transmitter. The function is disabled by default.
Applications
The formazine factory calibration is used as the basis for precalibrating additional applications and
optimizing them for the different media characteristics.
Application Specified operational range
Formazine 0.000 to 1000 FNU
Kaolin 0 to 150 mg/l
PSL 0 to 125
Diatomite 0 to 550 mg/l
To adapt to a specific application, customer calibrations can be carried out with up to 6 points.
During initial commissioning or calibration at the CM44x, select the appropriate application for
‣
your field of application.
Application Field of application Unit
Formazine Drinking water, process water FNU; NTU; TE/F; EBC; ASBC
Kaolin Drinking water, filterable matter, industrial water mg/l; g/l; ppm
PSL The calibration standard commonly used in Japan for drinking
water turbidity
Diatomite Mineral-based solids (sand) mg/l; g/l; ppm
(dough)
1 to 6 points can be calibrated for all applications.
NOTICE
Multiple scattering
If the specific operational range is exceeded, the measured value displayed by the sensor can
decrease despite increasing turbidity. The indicated operational range is reduced in the case of highly
absorbing (e.g. dark) media.
In the case of highly absorbing (e.g. dark) media, determine the operational range
‣
experimentally beforehand.
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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
A0030694
2 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
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Turbimax CUS52D
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A0030696
3 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.
Sensor structure
4 Arrangement of light source and light receiver
1 Light receiver
2 Light source
A0030692
Solid state reference
The solid state reference can be used to check the functional integrity of the sensor.
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Turbimax CUS52D
92
(3.62)
150 (5.91)
95°
293 (11.54)
42
80 (3.15)
95°
127 (5.00)
During factory calibration, each Calkit solid state reference is matched specifically to a special
CUS52D sensor and can be used only with this sensor. Therefore, the Calkit solid state reference and
the CUS52D sensor are permanently assigned (married) to one another.
The following Calkit solid state references are available:
• 5 FNU (NTU)
• 20 FNU (NTU)
• 50 FNU (NTU)
The reference value indicated on the Calkit solid state reference is reproduced with an accuracy of
± 10% when the sensor is operating correctly.
The CUY52 solid state reference with approx. 4.0 FNU/NTU is used to check the function of any
CUS52D sensors. The standard is not assigned to a specific sensor and delivers measured values in
the range of 4.0 FNU ± 1.5 FNU/NTU with all CUS52D sensors.
A0035755
5 Solid state reference
Calibration vessel
The CUY52 calibration vessel allows the sensors to be validated quickly and reliably. This makes it
easier to adapt to the actual measuring point by creating basic conditions that are reproducible (e.g.
vessels with minimal backscattering, shade from interfering light sources etc.). There are two
different types of calibration vessel into which the calibration solution (e.g. formazine) can be
transferred.
A0035756
6 Large calibration vessel (top) and small calibration vessel (bottom). Dimensions: mm (in)
Communication and data processing
For detailed information on calibration tools, see BA01309C
Communication with the transmitter
Always connect digital sensors with Memosens technology to a transmitter with Memosens
technology. Data transmission to a transmitter for analog sensors is not possible.
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Turbimax CUS52D
Digital sensors can store measuring system data in the sensor. These include the following:
• Manufacturer data
• Serial number
• Order code
• Date of manufacture
• Calibration data
• Calibration date
• Number of calibrations
• Serial number of the transmitter used to perform the last calibration
• Operating data
• Temperature application range
• Date of initial commissioning
Dependability Maintainability
Easy handling
Sensors with Memosens technology have integrated electronics that store calibration data and other
information (e.g. total hours of operation or operating hours under extreme measuring conditions).
Once the sensor has been connected, the sensor data are transferred automatically to the transmitter
and used to calculate the current measured value. As the calibration data are stored in the sensor,
the sensor can be calibrated and adjusted independently of the measuring point. The result:
• Easy calibration in the measuring lab under optimum external conditions increases the quality of
the calibration.
• Pre-calibrated sensors can be replaced quickly and easily, resulting in a dramatic increase in the
availability of the measuring point.
• Thanks to the availability of the sensor data, maintenance intervals can be accurately defined and
predictive maintenance is possible.
• The sensor history can be documented on external data carriers and in evaluation programs.
• Thus, the current application of the sensors can be made to depend on their previous history.
Measured variable
Measuring range
Electrical connection
Input
• Turbidity
• Temperature
• Solids content
CUS52D Application
Turbidity 0.000 to 4000 FNU
Display range up to 9999 FNU
Solids 0 to 600 mg/l
Display range up to 3 g/l
0 to 2 200 mg/l
Display range up to 10 g/l
Temperature –20 to 85 °C (–4 to 185 °F)
Formazine
Kaolin
Diatomite
Power supply
The following connection options are available:
• via M12 connector (version: fixed cable, M12 connector)
• via sensor cable to the plug-in terminals of a sensor input on the transmitter (version: fixed cable,
end sleeves)
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97 88 8798
97 88 8798
Sensor 1
Sensor 2
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GN
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Sensor
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97 88 8798
Sensor 1
PK
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Sensor
7 Sensor connection to sensor input (left) or via M12 connector (right)
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Turbimax CUS52D
A0033092
Connecting the cable shield
Cable sample (does not necessarily correspond to the original cable supplied)
8 Terminated cable
1 Outer shield (exposed)
2 Cable cores with ferrules
3 Cable sheath (insulation)
9 Inserting the cable
4 Grounding clip
10 Tightening the screw
(2 Nm (1.5 lbf ft))
The cable shield is grounded by the
grounding clip
The maximum cable length is 100 m (328.1 ft).
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