Endress+Hauser CUS71D Specifications

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

90°

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

2 Endress+Hauser

 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

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

Endress+Hauser 3

Turbimax CUS71D

N L

43 42 41

86 85 86

98 97 88 87

32 31

PK GY

Sensor

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

4 Endress+Hauser

+ 8 hidden pages