Endress+Hauser CM82 Specifications

TI01397C/07/EN/01.18 71406282 2018-01-31

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Technical Information

Liquiline Compact CM82

Configurable multiparameter transmitter for Memosens sensors

Space-saving transmitter for monitoring and controlling processes in industry and the environmental sector

Application

The CM82 can be used in all sectors and by plant manufacturers in these sectors and supports all sensors with the blue Memosens plug-in head:

• pH, ORP and pH-ORP combined electrodes

• Conductive conductivity

• Oxygen Direct connection to PLC via:

• 4 to 20 mA

• HART

• Bluetooth® LE interface for commissioning and maintenance

Your benefits

• Space-saving installation and storage: – The two-wire device fits into an assembly and does not require a separate power

supply.

– Minimum inventory

• Maximum safety: Tried and trusted Memosens technology

• Easy operation – Use your existing tablet and smartphone for operation and commissioning. – Standardized operating concept across all devices from the Liquiline platform

• Fast and reliable A reliable Bluetooth® LE connection allows you to check measuring points that are dangerous or difficult to access from a safe distance.

• Suitable for all locations Regardless of whether your measuring point is exposed to dust, steam, rain, snow, heat or cold, the CM82 is always exactly the transmitter you need!

Function and system design

Liquiline Compact CM82

Measuring system

The overview shows examples of measuring systems. Other sensors and assemblies can be ordered for conditions specific to your application (www.endress.com/products).

A complete measuring system comprises:

• Liquiline compact transmitter

• Sensors with Memosens technology

• Assemblies to suit the sensors used

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 1 Example of a measuring system

1 Measuring point with assembly and Memosens sensor 2 Liquiline Compact CM82 3 Junction box, optionally available 4 PLC (programmable logic control) 5 Bluetooth LE optional for mobile terminals, e.g. tablets

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Liquiline Compact CM82

MEMO SENS

Application example

A0035115

 2 Application example in a fermenter, using a tablet for operation

Reliability

Communication and data processing

Types of communication:

• 4 to 20 mA

• HART fieldbus

• Bluetooth® LE wireless technology (optional) The device drivers available make it possible to perform a basic setup and display measured

values and diagnostics information via the fieldbus. Full device configuration is possible via the fieldbus and Bluetooth.

Dependability

Memosens

Memosens makes your measuring point safer and more reliable:

• Non-contact, digital signal transmission enables optimum galvanic isolation

• No contact corrosion

• 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

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Liquiline Compact CM82

 3 Plug & Play with Memosens technology

The status of the transmitter and the connected sensor is indicated by a red/green LED.

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 4 LED display

USP and EP

• "Water for Injection" (WFI) as per USP <645> and EP

• "Highly Purified Water" (HPW) as per EP

• "Purified Water" (PW) as per EP The uncompensated conductivity value and the temperature are measured for the USP/EP limit

functions. The measured values are compared against the tables defined in the standards. An alarm is triggered if the limit value is exceeded. Furthermore, it is also possible to configure an early warning alarm that signals undesired operating states before they occur.

Safety Safe signal transmission via Bluetooth® LE

Signal transmission via Bluetooth® wireless technology uses a cryptographic technique tested by the Fraunhofer Institute.

Security levels for Endress and Hauser Bluetooth infrastructure:

• Protocol: High

• Algorithms: High Measured against:

• the security objectives, e.g. confidentiality, integrity, availability, etc.

• the risk analysis, e.g. key distribution, authentication, password recovery, etc.

• the attack model, e.g. motivation for attack, time required, expertise in electronics, etc.

• the weak-point analysis For comparison: The general Bluetooth standard is classified as "Low".

Protection against unauthorized access:

• Password-protected

• Without the SmartBlue app, the device is not visible via Bluetooth® wireless technology.

• Only one point-to-point connection is established between a sensor and a smartphone or tablet.

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1) Multi-level scale for security assessments in accordance with Fraunhofer AISEC cryptographic technique: "Very low", "Low", "High", "Very high"

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Liquiline Compact CM82

• The Bluetooth® wireless technology interface can be disabled via SmartBlue.

• Bluetooth® is optional. It can be ordered with this functionality enabled.

If ordered with Bluetooth® disabled, Bluetooth® can be enabled at a later stage by means of an activation code (accessory kit) linked to the serial number.

• A disabled Bluetooth® interface can be re-enabled only via HART.

Measured value compensation

pH:

Temperature

Oxygen:

• Temperature

• Air pressure

Conductivity:

Temperature Various methods are available to compensate for the temperature dependency: – Linear – NaCl (IEC 746-3) – Water ISO7888 (20°C) – Water ISO7888 (25°C)

IT security

Our warranty is valid only if the device is installed and used as described in the Operating Instructions. The device is equipped with security mechanisms to protect it against any inadvertent changes to the settings.

IT security measures, which provide additional protection for the device and associated data transfer, must be implemented by the operators themselves in line with their security standards.

Measured values

Measuring ranges

Types of input

Cable specification

Output signal

Linearization/transmission behavior

Input

The transmitter is designed for digital Memosens sensors with inductive plug-in head:

• pH, ORP. pH/ORP combined sensors

• Conductive Conductivity

• Dissolved oxygen

→ Documentation of the connected sensor

Digital sensor inputs for Memosens-sensors

Cable length:

• Max. 3 m (10 ft)

• Max. 7 m (23 ft)

• Max. 15 m (49 ft)

Output

4 ... 20 mA/HART, galvanically isolated from the sensor circuits

Linear

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