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TI00191C/07/EN/13.14
71271526
Products Solutions Services
Technical Information
Orbipac CPF81D/CPF82D and
CPF81/CPF82
pH/ORP compact electrodes, with digital
Memosens technology or analog
For processes in mining industries and for
treatment of industrial water and wastewater
Application
• Flotation
• Leaching
• Neutralization
• Outlet monitoring
Your benefits
• With patented KNO3 electrolyte bridge for better protection against electrode
poisons such as S2- or CN ions
• Optionally available with flat membrane for improved wear resistance
• Threaded connection NPT ¾" top and bottom for easy installation at user end
• Suitable for measurements within pH range 0 to 14 and within temperature range
0 to 110 °C (32 to 230 °F)
• Digital pH sensors with integrated temperature sensor, analog pH electrodes with
or without integrated temperature sensor
• Protection guard against damage
Other advantages of Memosens technology
• Maximum process safety owing to non-contact, inductive signal transmission
• Data security thanks to digital data transmission
• Very easy to use as sensor data saved in the sensor
• Predictive maintenance possible as sensor load data logged in the sensor
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Function and system design
1 2
3
Orbipac CPF81D/CPF82D and CPF81/CPF82
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.
ORP measurement
The ORP potential is a unit of measurement for the state of equilibria between oxidizing and
reducing components of a medium. The ORP is measured using a platinum or gold electrode instead
of the pH-sensitive glass membrane. Analog to the pH measurement, an integrated Ag/AgCl
reference system is used as a reference electrode.
A complete measuring system comprises:
• Sensor CPF81D, CPF81, CPF82D or CPF82
• Transmitter,e.g. Liquiline CM44x/R or Liquiline M CM42
• Measuring cable, e.g. CYK10 or sensor's fixed cable
1 Example of a measuring system
1 Sensor CPF81D
2 Liquiline CM44x transmitter
3 Measuring cable CYK10
Communication and data transmission
Communication with the transmitter
Always connect digital sensors to a transmitter with Memosens technology. Data transmission to a
transmitter for analog sensors is not possible.
A0024721
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Orbipac CPF81D/CPF82D and CPF81/CPF82
The digital sensors are able to store the following system data in the sensor.
• Manufacturing data
– Serial number
– Order code
– Date of manufacture
• Calibration data
– Calibration date
– Calibrated slope at 25 °C (77 °F) (CPF81D)
– Calibrated zero point at 25 °C (77 °F) (CPF81D)
– Calibrated offset (CPF82D, ORP mV measuring mode)
– Slope as % (CPF82D, ORP % measuring mode)
– Temperature offset
– Number of calibrations
– Serial number of the transmitter used for the last calibration
– Calibration database (stores the last 8 calibrations in the Memosens head)
• Application data
– Temperature application range
– pH application range (CPF81D)
– ORP application range (CPF82D)
– Date of first commissioning
– Maximum temperature value
– Operating hours at temperatures above 80 °C (176 °F) and 100 °C (212 °F)
– Operating hours at very low and very high pH values (Nernst voltage below -300 mV, above
+300 mV)
Dependability
Interference immunity
Safety
Reliability
Easy handling
Sensors with Memosens technology have integrated electronics that allow for saving calibration data
and further information such as total hours of operation 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 on external data carriers and evaluation programs at any
time. Thus, the current application of the sensors can be made to depend on their previous history.
Data security thanks to digital data transmission
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
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 value distortion from moisture is not possible.
– The plug-in system 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.
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Input
GN/YE
YE
GN
BN
WH
GND
+
–
Com A
Com B
GY
pH/ORP
+ Pt 100
PM
Coax BK
WH
GN
BN
Screen connection
WH
YE
Ref.
pH
Temp
Temp.
Temp.
PM
Measured values CPF81D, CPF81
pH value
Temperature
CPF82D, CPF82
ORP
Measuring range CPF81D, CPF81
Version LH:
pH 0 ... 14
Temperature 0 to 110 °C (32 to 230 °F)
Version NN:
pH 0 to 14 (11 to 14 with reduced accuracy)
Temperature 0 to 80 °C (32 to 170 °F)
CPF82D, CPF82
-1500 mV to +1500 mV
Please note the process operating conditions.
Orbipac CPF81D/CPF82D and CPF81/CPF82
Power supply
Electrical connection CPF81D and CPF82D
The electrical connection of the sensor to the transmitter takes place via special measuring cable
CYK10 or CYK20.
2 Measuring cable CYK10/CYK20
CPF81 and CPF82 with TOP68 plug-in head
A0024019
3 Measuring cable CPK9
4 Endress+Hauser
A0024668-EN
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Orbipac CPF81D/CPF82D and CPF81/CPF82
BK
BK
GN/YE
BN
BK
BK
GN
WH
YE
GN/YE
BN
GN
WH
YE
A B
Reference
pH/ORP
Temperature
Temperature
Temperature
Outer screen
PM / n. c.*
CPF81 and CPF82 with fixed cable
4 Fixed cable connection
A Fixed cable CPF81 without temperature sensor and CPF82
B Fixed cable CPF81 with temperature sensor
* The PML is connected only in the case of sensor versions with an internal PML (CPF81-xxx2xx)
Installation
A0024680-EN
Installation instructions
A0024681
5 Flow installation
6 Immersion installation with Flexdip CYA112
Make sure to follow the installation instructions in the Operating Instructions of the used
assembly.
A0024690
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Environment
60
80
100
20
400
2
4
6
8
10
140
180
220
60
10032
40
120
°C
°F
bar
psi
50.8
176
110
230
80
15 1
3.5
145
Orbipac CPF81D/CPF82D and CPF81/CPF82
Ambient temperature
NOTICE
Danger of frost damage
The sensor must not be used at temperatures below 0 °C (32 °F).
‣
Storage temperature
0 to 50 °C (32 to 120 °F)
Degree of protection CPF81D, CPF82D
IP 68 (10 m (33 ft) head of water at 25 ˚C (77 ˚F) over 45 days, 1 mol/l KCl)
CPF81, CPF82 with TOP68 plug-in head
IP 68 (1 m (3.3 ft) water column, 50 °C (122 °F), 168 h)
CPF81, CPF82 with fixed cable
IP 67
Electromagnetic compatibility
Interference emission and interference immunity in accordance with EN 61326-1:2006, EN
61326-2-3:2006
Memosens versions
for ESD > 8 kV: reduced accuracy ±1.5 pH
Process
Process temperature
Process pressure
Pressure temperature load curve
Glass impedance
Minimum conductivity
CPF81D, CPF81
Version LH 0 to 110 °C (32 to 230 °F)
Version NN 0 to 80 °C (32 to 170 °F)
CPF82D, CPF82 0 to 80 °C (32 to 170 °F)
1 to 10 bar absolute, at 80 °C (15 to 145 psi absolute, at 176 °F)
A0024703
150 MΩ at 25 °C (77 °F)
50 μS/cm
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Orbipac CPF81D/CPF82D and CPF81/CPF82
58.5 (2.3)
150 (5.91)
Ø 22 (0.87)
35 (1.38)
1
2
3
4
2
12.5 (0.49)
140 (5.51)
Ø 22 (0.87)
35 (1.38)
1
2
3
4
2
23 (0.91)
150 (5.91)
Ø 22 (0.87)
35 (1.38)
1
2
3
4
2
5
Mechanical construction
Design, dimensions CPF81D, CPF82D
7 CPF81D, long shaft,
protection guard
1 Memosens plug-in head
2 NPT ¾" thread
3 Across flats AF 26
4 Protection guard
A0024672
8 CPF81D, flat membrane
1 Memosens plug-in head
2 NPT ¾" thread
3 Across flats AF 26
4 Flat membrane
A0024671
9 CPF82D, short shaft,
protection guard
1 Memosens plug-in head
2 NPT ¾" thread
3 Across flats AF 26
4 Platinum ring
A0024673
5 Protection guard
Dimensions in mm (inch)
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CPF81, CPF82
Ø 22 (0.87)
12.5 (0.49)
140 (5.51)
1
2
3
4
2
Ø 22 (0.87)
23 (0.91)
150 (5.91)
1
2
3
4
2
Ø 22 (0.87)
58.5 (2.3)
150 (5.91)
1
2
3
4
2
Orbipac CPF81D/CPF82D and CPF81/CPF82
Weight
Materials
Process connection
Integrated preamplifier (optional)
A0024676
10 CPF81 with TOP68 plug-in
head, short shaft, flat
membrane
1 TOP68 plug-in head
2 NPT ¾" thread
3 Across flats AF 26
4 Flat membrane
Dimensions in mm (inch)
11 Fixed-cable version, short
shaft, protection guard
1 Fixed cable
2 NPT ¾" thread
3 Across flats AF 26
4 Protection guard
A0024674
12 Fixed-cable version, long
shaft, protection guard
1 Fixed cable
2 NPT ¾" thread
3 Across flats AF 26
4 Protection guard
0.12 to 0.15 kg (0.26 to 0.33 lbs, depending on version and without cable)
Housing, electrode shaft
PPS
pH electrode (in contact with medium) Lead-free membrane glass, suitable for process
applications
ORP electrode (in contact with medium): Platinum ring
Double chamber reference system: KNO3 and KCl/AgCl
NPT ¾"
Structure
cast in sensor body
Power supply via integrated coin cells
Reference potential: reference electrode
With preamplifier versions, the sensor check function (SCS) of the transmitter is ineffective and
should be turned off.
A0024677
Ex approval (optional)
8 Endress+Hauser
Certificates and approvals
FM IS NI Cl. I Div.1&2, Groups A-D
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Orbipac CPF81D/CPF82D and CPF81/CPF82
Ordering information
Product page
Product Configurator
Scope of delivery
www.endress.com/cpf81d
www.endress.com/cpf81
www.endress.com/cpf82d
www.endress.com/cpf82
The navigation area is located on the right of the product page.
1. Under "Device support" click "Configure your selected product".
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 at the top of
the screen.
The scope of delivery includes:
• Sensor in the version ordered
• Technical Information
Accessories
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 office.
Assembly
Measuring cables
Buffer
Flexdip CYA112
• Immersion assembly for water and wastewater
• Modular assembly system for sensors in open basins, channels and tanks
• Product Configurator on the product page: www.endress.com/cya112
Technical Information TI00432C
CYK10 Memosens data cable
• For digital sensors with Memosens technology
• Product Configurator on the product page: www.endress.com/cyk10
Technical Information TI00118C
CPK9
• Terminated measuring cable for connecting analog sensors with TOP68 plug-in head
• Selection in accordance with product structure
For more information and to order, please contact your sales office.
High-quality buffer solutions from Endress+Hauser - CPY20
The secondary buffer solutions have been referenced to primary reference material of the PTB
(German Federal Physico-technical Institute) and to standard reference material of NIST (National
Institute of Standards and Technology) according to DIN 19266 by a DKD (German Calibration
Service) accredited laboratory.
Product Configurator on the product page: www.endress.com/cpy20
Technical buffer solutions for ORP electrodes
• +220 mV, pH 7, 100 ml; order no. CPY3-0
• +468 mV, pH 0.1, 100 ml; order no. CPY3-1
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www.addresses.endress.com
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