TI00490C/07/EN/05.18
71413605
2018-05-01
Products Solutions Services
Technical Information
Turbimax CUS71D
Ultrasonic interface sensor
Application
CUS71D is a sensor designed for interface measurement in
water and wastewater.
The sensor is particularly suited for use in the following
applications:
• Wastewater treatment: primary clarifier, sludge thickener,
secondary clarifier
• Water treatment: sedimentation tank after flocculant
dosage, sludge height in contact sludge processes
• Static separation processes: with/without slow stirring and
without introduction of air
Your benefits
• Reliable: sensor guarantees accurate and continuous
measurement of interface level or range
• Safe: real-time interface information ensures quick control
of valves and actuators
• Easy: simple commissioning thanks to predefined calculation
models
• Cost-saving: automatic wiper cleaning function enables
long-term, maintenance-free operation
• Smart: all calibration- and sensor-related data saved in the
sensor
• Flexible: mounting hardware suits all clarifier designs,
ensuring optimum adaptation to the measurement task
Function and system design
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90°
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Turbimax CUS71D
Measuring principle
Sensor monitoring
Measuring system
A piezoelectric crystal is enclosed in a flat cylindrical plastic housing. When the crystal is excited by
an electrical voltage, it generates a sonar signal. This causes ultrasonic waves to be transmitted at a
frequency of approx. 650 kHz and at an angle of 6° to scan the separation zones.
The measured variable is the time the transmitted ultrasonic signal needs to reach the solid particles
in the separation zone and return to the receiver. The separation zone is computed after the
maximum slope and the maximum signal amplitude.
A sensor version featuring a wiper is available to reliably avoid the buildup of deposit on the sensor
membrane.
The acoustic signals are continuously monitored and analyzed for plausibility. If inconsistencies
occur, an error message is output via the transmitter.
In addition, the following fault conditions are detected by the sensor diagnostics of Liquiline CM44x:
• Implausibly high or low measured values
• Disturbed regulation due to incorrect measured values
A complete measuring system comprises:
• Turbimax CUS71D ultrasonic sensor
• Liquiline CM44x multi-channel transmitter
and is optionally delivered with the following accessories:
• A weather protection cover CYY101
• A Flexdip CYH112 holder
• A fixed or rotatable Flexdip CYA112 dip pipe
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1 Ultrasonic sensor with basin holder system and multi-channel transmitter
1 Flexdip CYH112 holder
2 Liquiline CM44x multi-channel transmitter
3 Protective cover
4 Flexdip CYA112 assembly
5 Turbimax CUS71D ultrasonic sensor
6 Vertical from all sides
7 Splash protection cap
A0031577
Turbimax CUS71D
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2
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4
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MEMO SENS
Measuring system with pendulum holder
A0031578
2 Measuring system with pendulum holder
1 Flexdip CYH112 holder (cross clamp)
2 Flexdip CYH112 holder (pendulum holder)
3 Flexdip CYA112 assembly with CUS71D
4 PVC sensor protector
5 Splash protection cap
The PVC sensor protector protects the ultrasonic sensor from being damaged by the surface
skimmer.
In the case of surface skimmers, only use the sensor without a wiper and with a PVC sensor
protector (→ 10).
Dependability
Reliability
Memosens
Memosens makes your measuring point safer and more reliable:
• Non-contact, digital signal transmission enables optimum galvanic isolation
• Completely watertight
• Sensor can be calibrated in a lab, thus increasing the availability of the measuring point in the
process
• Predictive maintenance thanks to recording of sensor data, e.g.:
– Total hours of operation
– Hours of operation with very high or very low measured values
– Hours of operation at high temperatures
– Number of steam sterilizations
– Sensor condition
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
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Turbimax CUS71D
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86 85 86
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32 31
32 31
PK
GY
GN
YE
Sensor
PE
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.
Security
Data security thanks to digital data transmission
Memosens technology digitizes the measured values in the sensor and transmits the data to the
transmitter via a non-contact connection that is free from potential interference. The result:
• Automatic error message if sensor fails or connection between sensor and transmitter is
interrupted
• Immediate error detection increases measuring point availability
Input
Measured variable
Measuring range
Electrical connection
Interface
0.3 to 10 m (1 to 32 ft)
Power supply
1. Connect one sensor (maximum) to the Liquiline CM442. Connect up to 4 sensors to the
Liquiline CM444 and CM448 transmitters.
2. Connect the fixed cable of the sensor to the Liquiline CM44x transmitter as follows:
A0034802
3 Sensor connection
The maximum cable length is 100 m (328 ft).
3. Use the following accessories to extend the sensor cable if necessary:
• CYK11 measuring cable with ferrules → 11
• Cable/cable junction box → 11
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Turbimax CUS71D
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Connecting the cable shield
Only use terminated original cables where possible. The sensor cables must be shielded cables.
Cable sample (does not necessarily correspond to the original cable supplied)
Reference operating conditions
Measured value resolution
Maximum measured error
Measuring interval
Calibration
4 Terminated cable
1 Outer shield (exposed)
2 Cable cores with ferrules
3 Cable sheath (insulation)
5 Insert the cable
4 Grounding clip
6 Tighten screw (2 Nm)
The cable shield is grounded by the
grounding clip.
Performance characteristics
20 °C (68 °F), 1013 hPa
± 0.3 % with end of measuring range up to 3 m (9.8 ft)
± 0.15 % with end of measuring range from 3 m (9.8 ft)
± 2 % of end of measuring range
Sensor-internal
Sensor to transmitter 12 seconds
The sensor is factory-configured when delivered.
Configurable
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Installation
A
B
C
D
E
6°
F
Turbimax CUS71D
Installation instructions
Basin configuration
A0031574
7 Basin configuration
A Sensor
B 50 cm (1.64 ft) Minimum distance between sensor and basin rim
C Fixed reference point, e.g. surface of water, basin rim, bridge/walkway etc.
D Sensor offset
E Basin depth
F Opening angle of ultrasonic cone 6°
Installation instructions
Find a suitable installation position for the sensor in the basin. Take the following points into
consideration when selecting the installation position:
1. Ensure the distance from the basin rim is at least 50 cm (1.64 ft) (the sensor emits ultrasonic
waves in a conical pattern).
There should not be any conduits or basin wall protrusions in the measuring range below
the sensor. Scraper units that are only temporarily in this area are permitted.
2. Mount the sensor so that it is straight and parallel to the basin wall (measured value offset).
Do not install the sensor in zones where air bubbles, turbulence, high concentrations of
turbid material and suspended matter, or foam formation occur (e.g. inlet).
3. Using a dip pipe, install the sensor at least 20 cm (0.66 ft) beneath the surface of the water.
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Turbimax CUS71D
¹/₃
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B
²/₃
¹/₃
²/₃
Circular clarifier
A0031579
8 Basin configuration in circular clarifiers
A View from above B Cross-section
1 Surface skimmer 11 Sensor
2 Bridge/walkway 12 Rail
Storage temperature
Degree of protection
3 Sensor position range 13 Surface skimmer
4 Floor rake 14 Floor rake
5 Direction of rake movement
Environment
–20 to 50 °C (–4 to 120 °F)
IP 68 (1 m (3.3 ft) water column over 60 days, 1 mol/l KCl)
Process
Process temperature range
Process pressure range
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1 to 50 °C (34 to 122 °F)
Standard version:
Version with wiper: 0 to 0.3 bar (0 to 4.4 psi)
0 to 6 bar (0 to 87 psi)
Dimensions
Ø 74 (2.9)
Ø 75 (3.0)
Ø 33.7(1.3)
20.5
(0.8)
17
(0.7)
15
(0.6)
G1"
NPT 3/4"
43 (1.7)
68 (2.7)
60.5 (2.4)
AF 27
Ø 34.7(1.4)
Ø74(2.9)
110
(
4
.
3
)
8
135
(5.3)
6
0.5(2.4)
Ø75(3.0)
Ø34.7
(1.4)
17
(0.7)
20.5
(0.8)
1
5
(0.6)
Ø 33.7 (1.3)
G1"
NPT 3/4"
AF 27
Turbimax CUS71D
Mechanical construction
Weight
Materials
Process connections
mark
EAC
A0036897
9 Dimensions for standard sensor.
Dimensions: mm (in)
10 Dimensions for sensor with wiper. Dimensions:
mm (in)
Standard sensor:
1.02 kg (2.25 lb)
Sensor with wiper: 1.25 kg (2.75 lb)
Sensor:
ABS and epoxy resin
Wiper: EPDM
Housing: Polyamide
G1 and NPT ¾"
Certificates and approvals
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.
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.
A0036898
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Turbimax CUS71D
Electromagnetic compatibility
Product page
Product Configurator
Scope of delivery
Interference emission and interference immunity: Industrial environment as per
• EN 61326-1:2013
• EN 61326-2-3:2013
• NAMUR NE21: 2012
Ordering information
www.endress.com/cus71d
On the product page there is a Configure button to the right of the product image.
1. Click this button.
The Configurator opens in a separate window.
2. Select all the options to configure the device in line with your requirements.
In this way, you receive a valid and complete order code for the device.
3. Export the order code as a PDF or Excel file. To do so, click the appropriate button on the right
above the selection window.
For many products you also have the option of downloading CAD or 2D drawings of the
selected product version. Click the CAD tab for this and select the desired file type using
picklists.
The delivery comprises:
• 1 Turbimax CUS71D sensor, version as ordered
• 1 set of Operating Instructions BA00490C/07/EN
If you have any queries:
‣
Please contact your supplier or local sales center.
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Accessories
Ø 50
(2.0)
Ø 76 (3)
Ø 99 (3.9)
44
(1.7)
144 (5.7)
Ø 41
(1.6)
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2
3
The following are the most important accessories available at the time this documentation was
issued.
For accessories not listed here, please contact your Service or Sales Center.
‣
Device-specific accessories Assemblies
FlexdipCYA112
• Immersion assembly for water and wastewater
• Modular assembly system for sensors in open basins, channels and tanks
• Material: PVC or stainless steel
• Product Configurator on the product page: www.endress.com/cya112
Technical Information TI00432C
PVC sensor protector for pendulum holder
• The PVC sensor protector protects the CUS71D ultrasonic sensor from being damaged by the
surface skimmer.
• Available for order via the product structure
• Can be ordered individually via order number: 71404869
Only use the PVC sensor protector for the sensor version without a wiper.
Turbimax CUS71D
11 PVC sensor protector for CUS71D. Dimensions: mm (in)
1 CYA112 assembly
2 PVC sensor protector
3 CUS71D ultrasonic sensor
Holder
Flexdip CYH112
• Modular holder system for sensors and assemblies in open basins, channels and tanks
• For Flexdip CYA112 water and wastewater assemblies
• Can be affixed anywhere: on the ground, on the capstone, on the wall or directly onto railings.
• Stainless steel version
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• Product Configurator on the product page: www.endress.com/cyh112
Technical Information TI00430C
A0037314
Turbimax CUS71D
Cable extension
Memosens data cable CYK11
• Extension cable for digital sensors with Memosens protocol
• Product Configurator on the product page: www.endress.com/cyk11
Technical Information TI00118C
Junction box, cable/cable
• Material: aluminum, painted
• Cable extension: Memosens sensors, Liquiline
• Order number: 71145499
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