Endress+Hauser CPS11D Specifications
TI00028C/07/EN/14.15
71299911
Products Solutions Services
Technical Information
Orbisint CPS11D and CPS11
pH electrodes, analog or with digital Memosens
technology
For standard applications in process and
environmental technology, with dirt-repellent
PTFE diaphragm, built-in temperature sensor
(optional for analog sensor)
Application
• Long-term monitoring and limit value monitoring of processes with stable process
conditions
– Chemical industry: strong acids/bases, plastic, pulp and paper industry
– Power plants (e.g. flue gas cleaning), oil and gas
– Incinerator plants
• Water/wastewater treatment
– Boiler feedwater and cooling water
– Well water and drinking water
– All industrial and municipal treatment plants
With ATEX, IECEx, FM, CSA, TIIS and NEPSI approval for use in hazardous areas
Your benefits
• Low-maintenance and robust thanks to large PTFE ring junction
• Can be used at pressures up to 17 bar abs. (246 psi)
• Process glass also for very alkaline applications (BA and BT versions)
• Process glass for applications in media containing hydrofluoric acid (FA version)
• For media with low conductivity (AS version)
• Integrated NTC30K temperature sensor (Memosens) for effective temperature
compensation; Pt100 or Pt1000 for analog sensors
• Optional: Poison-resistant reference with ion trap
Other advantages of Memosens technology
• Maximum process safety
• Data security thanks to digital data transmission
• Very easy to use as sensor data saved in the sensor
• Recording of sensor load data in the sensor enables predictive maintenance with
the Memobase Plus CYZ71D
Function and system design
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Orbisint CPS11D and CPS11
Measuring principle
Measuring system
pH measurement
The pH value is used as a unit of measurement for the acidity or alkalinity of a liquid medium. The
membrane glass of the electrode supplies an electrochemical potential which is dependent upon the
pH value of the medium. This potential is generated by the selective penetration of H+ ions through
the outer layer of the membrane. An electrochemical boundary layer with an electric potential forms
at this point. An integrated Ag/AgCl reference system serves as the required reference electrode.
The transmitter converts the measured voltage into the corresponding pH value using the Nernst
equation.
A complete measuring system comprises at least the following components:
• pH electrode CPS11D or CPS11
• Transmitter, e.g. Liquiline CM42, CM44x, Mycom S CPM153, Liquisys M CPM2x3
• Memosens data cable CYK10 for Memosens sensors or CPK9 for analog sensors
• Immersion, flow or retractable assembly, e.g. Cleanfit CPA871
A0025757
1 Example of a measuring system for pH measurement
1 Retractable assembly Cleanfit CPA871
2 pH electrode CPS11D
3 Memosens data cable CYK10
4 Liquiline M CM42 two-wire transmitter for hazardous area
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Orbisint CPS11D and CPS11
CPS11D communication and data processing
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.
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
– Slope at 25 °C (77 °F)
– Zero point at 25 °C (77 °F)
– Temperature offset
– Number of calibrations
– Serial number of the transmitter used to perform the last calibration
• Operating data
– Temperature application range
– pH application range
– Date of initial commissioning
– Maximum temperature value
– Hours of operation under extreme conditions
– Number of sterilizations
– Resistance of glass membrane
You can display the abovementioned data using the Liquiline CM44x, CM42 and Memobase Plus
CYZ71D.
Dependability
Reliability
Integrity Data security thanks to digital data transmission
Easy handling
Sensors with Memosens technology have an integrated electronics unit that stores calibration data
and other information (e.g. total operating hours and 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 .
• Maintenance intervals can be defined based on all stored sensor load and calibration data and
predictive maintenance is possible.
• The sensor history can be documented using external storage media and evaluation programs, e.g.
Memobase Plus CYZ71D. Thus, the current application of the sensors can be made to depend on
their previous history.
Memosens technology digitizes the measured values in the sensor and transmits the data to the
transmitter using 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
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Orbisint CPS11D and CPS11
Safety
Measured variables
Measuring range
Maximum process safety
With inductive transmission of the measured value using a non-contact connection, Memosens
guarantees maximum process safety and offers the following benefits:
• All problems caused by moisture are eliminated:
– Plug-in connection free from corrosion
– Measured values cannot be distorted by moisture.
– Can even be connected under water
• The transmitter is galvanically decoupled from the medium. Issues concerning "symmetrical highimpedance" or "asymmetry" or an impedance converter are a thing of the past.
• EMC safety is guaranteed by screening measures for the digital transmission of measured values.
• Intrinsically safe electronics mean operation in hazardous areas is not a problem.
Input
pH value
Temperature
Electrode version AA (for water / wastewater), AS (for boiler feedwater):
pH: 1 to 12
Temperature: -15 to 80 °C (5 to 176 °F)
Electrode version BA (for process):
pH: 0 to 14
Temperature: 0 to 135 °C (32 to 275 °F)
Electrode version FA (for hydrofluoric acid process):
pH: 0 to 10
Temperature: 0 to 70 °C (32 to 158 °F)
Electrode version BT with ion trap (for chemicals, scrubbers, pulp and paper):
pH: 0 to 14
Temperature: 0 to 135 °C (32 to 275 °F)
Please note the process operating conditions.
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