WIKA CPT-2x series Manuale utente
Operating Instructions
Process pressure transmitter CPT-2x
Process pressure transmitter CPT-2x
Slave for electronic dierential pressure
With SIL qualication
Ceramic sensor
2
Contents
WIKA Operating Instructions - Process pressure transmitter CPT-2x
Contents
1 About this document ............................................................................................................... 4
1.1 Function ........................................................................................................................... 4
1.2 Target group..................................................................................................................... 4
1.3 Symbols used................................................................................................................... 4
2 For your safety ......................................................................................................................... 5
2.1 Authorised personnel ....................................................................................................... 5
2.2 Appropriate use................................................................................................................ 5
2.3 Warning about incorrect use............................................................................................. 5
2.4 General safety instructions............................................................................................... 5
2.5 EU conformity................................................................................................................... 6
2.6 SIL qualication according to IEC 61508.......................................................................... 6
2.7 Permissible process pressure .......................................................................................... 6
2.8 Installation and operation in the USA and Canada ........................................................... 6
3 Product description ................................................................................................................. 7
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 8
3.3 Supplementary cleaning procedures.............................................................................. 13
3.4 Packaging, transport and storage................................................................................... 14
4 Mounting................................................................................................................................. 15
4.1 General instructions ....................................................................................................... 15
4.2 Ventilation and pressure compensation.......................................................................... 16
4.3 Combination Master - Slave ........................................................................................... 18
4.4 Level measurement........................................................................................................ 20
4.5 Dierential pressure measurement ................................................................................ 21
4.6 Interface measurement .................................................................................................. 21
4.7 Density measurement .................................................................................................... 22
4.8 Density-compensated level measurement ..................................................................... 23
4.9 External housing ............................................................................................................ 25
5 Connecting to power supply................................................................................................. 26
5.1 Preparing the connection ............................................................................................... 26
5.2 Connecting..................................................................................................................... 26
5.3 Single chamber housing................................................................................................. 28
5.4 External housing with version IP 68 (25 bar)................................................................... 28
5.5 Connection example ...................................................................................................... 30
6 Functional safety (SIL) .......................................................................................................... 31
6.1 Objective ........................................................................................................................ 31
6.2 SIL qualication.............................................................................................................. 31
6.3 Application area ............................................................................................................. 31
6.4 Safety concept of the parameterization .......................................................................... 32
7 Set up with the display and adjustment module ................................................................ 34
7.1 Parameter adjustment .................................................................................................... 34
8 Diagnosis, asset management and service ........................................................................ 47
8.1 Maintenance .................................................................................................................. 47
8.2 Cleaning - hygienic connection with compression nut .................................................... 47
8.3 Rectify faults................................................................................................................... 48
3
Contents
WIKA Operating Instructions - Process pressure transmitter CPT-2x
8.4 Exchange process module on version IP 68 (25 bar) ..................................................... 48
8.5 Instrument repair ............................................................................................................ 49
9 Dismount................................................................................................................................. 51
9.1 Dismounting steps.......................................................................................................... 51
9.2 Disposal ......................................................................................................................... 51
10 Supplement ............................................................................................................................ 52
10.1 Technical data ................................................................................................................ 52
10.2 Calculation of the total deviation..................................................................................... 62
10.3 Practical example........................................................................................................... 63
10.4 Dimensions .................................................................................................................... 66
10.5 Trademark ...................................................................................................................... 74
Safety instructions for Ex areas
Take note of the Ex specic safety instructions for Ex applications.
These instructions are attached as documents to each instrument
with Ex approval and are part of the operating instructions manual.
Editing status: 2017-11-23
4
1 About this document
WIKA Operating Instructions - Process pressure transmitter CPT-2x
1 About this document
1.1 Function
This operating instructions manual provides all the information you
need for mounting, connection and setup as well as important instruc-
tions for maintenance, fault rectication, the exchange of parts and
the safety of the user. Please read this information before putting the
instrument into operation and keep this manual accessible in the im-
mediate vicinity of the device.
1.2 Target group
This operating instructions manual is directed to trained personnel.
The contents of this manual must be made available to the qualied
personnel and implemented.
1.3 Symbols used
Information, tip, note
This symbol indicates helpful additional information.
Caution: If this warning is ignored, faults or malfunctions can result.
Warning: If this warning is ignored, injury to persons and/or serious
damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.
Ex applications
This symbol indicates special instructions for Ex applications.
• List
The dot set in front indicates a list with no implied sequence.
→ Action
This arrow indicates a single action.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.
5
2 For your safety
WIKA Operating Instructions - Process pressure transmitter CPT-2x
2 For your safety
2.1 Authorised personnel
All operations described in this operating instructions manual must
be carried out only by trained specialist personnel authorised by the
plant operator.
During work on and with the device the required personal protective
equipment must always be worn.
2.2 Appropriate use
CPT-2x is a slave sensor for electronic dierential pressure measure-
ment.
You can nd detailed information about the area of application in
chapter "Product description".
Operational reliability is ensured only if the instrument is properly
used according to the specications in the operating instructions
manual as well as possible supplementary instructions.
2.3 Warning about incorrect use
Inappropriate or incorrect use of this product can give rise to applica-
tion-specic hazards, e.g. vessel overll through incorrect mounting
or adjustment. Damage to property and persons or environmental
contamination can result. Also, the protective characteristics of the
instrument can be impaired.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and directives. The instrument must only be operated in a
technically awless and reliable condition. The operator is responsi-
ble for the trouble-free operation of the instrument. When measuring
aggressive or corrosive media that can cause a dangerous situation
if the instrument malfunctions, the operator has to implement suitable
measures to make sure the instrument is functioning properly.
During the entire duration of use, the user is obliged to determine the
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new regula-
tions.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
trary conversions or modications are explicitly forbidden. For safety
reasons, only the accessory specied by the manufacturer must be
used.
6
2 For your safety
WIKA Operating Instructions - Process pressure transmitter CPT-2x
To avoid any danger, the safety approval markings and safety tips on
the device must also be observed and their meaning looked up in this
operating instructions manual.
2.5 EU conformity
The device fulls the legal requirements of the applicable EU direc-
tives. By axing the CE marking, we conrm the conformity of the
instrument with these directives.
2.6 SILqualicationaccordingtoIEC61508
The Safety Integrity Level (SIL) of an electronic system is used to as-
sess the reliability of integrated safety functions.
For detailed specication of the safety requirements, multiple SIL
levels are specied according to safety standard IEC 61508. You can
nd detailed information in chapter "Functional safety (SIL)" of the
operating instructions.
The instrument meets the specications of IEC 61508: 2010 (Edi-
tion 2). It is qualied for single-channel operation up to SIL2. The
instrument can be used homogeneously redundant up to SIL3 in
multi-channel architecture with HFT 1.
2.7 Permissible process pressure
For safety reasons, the instrument must only be operated within the
permissible process conditions. You can nd detailed information on
the process conditions in chapter "Technical data" as well as on the
type label.
The permissible process pressure range is specied on the type label
with "Process pressure", see chapter "Conguration". This applies
even if a measuring cell with a measuring range (order-related) higher
than the permissible pressure range of the process tting is installed.
A temperature derating, e.g. with anges, can limit the permissible
process pressure range.
2.8 Installation and operation in the USA and
Canada
This information is only valid for USA and Canada. Hence the follow-
ing text is only available in the English language.
Installations in the US shall comply with the relevant requirements of
the National Electrical Code (ANSI/NFPA 70).
Installations in Canada shall comply with the relevant requirements of
the Canadian Electrical Code
7
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
3 Product description
3.1 Conguration
The type label contains the most important data for identication and
use of the instrument:
4
1
5
10
12
11
13
14
3
2
6
7
8
9
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Field for approvals
3 Power supply and signal output, electronics
4 Protection rating
5 Measuring range
6 Permissible process conditions
7 Material wetted parts
8 Product code
9 Order number
10 Serial number of the instrument
11 Symbol of the device protection class
12 ID numbers, instrument documentation
13 Reminder to observe the instrument documentation
14 SIL identication
This operating instructions manual applies to the following instrument
versions:
• Hardware from 1.0.0
• Software version from 1.0.0
Note:
You can nd the hardware and software version of the instrument as
follows:
• On the type plate of the electronics module
• In the adjustment menu under "Info"
The scope of delivery encompasses:
• Instrument CPT-2x - Slave sensor
• Ready-made connection cable, unassembled cable gland
• Documentation
– Quick setup guide CPT-2x
– Safety Manual (SIL)
Type label
Scope of this operating
instructions manual
Scope of delivery
8
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
– Documentation instrument parameters (default values)
– Documentation order-relating instrument parameters (deviation
from default values)
– Test certicate for pressure transmitters
– Instructions for optional instrument features
– Ex-specic "Safety instructions" (with Ex versions)
– If necessary, further certicates
Information:
Optional instrument features are also described in this operating
instructions manual. The respective scope of delivery results from the
order specication.
3.2 Principle of operation
The CPT-2x slave sensor is combined with a sensor from the instru-
ment series for electronic dierential pressure measurement.
1
2
Fig. 2: Example, electronic dierential pressure for level measurement in pres-
surized vessel
1 CPT-2x
2 CPT-2x, slave sensor
The sensors are connected via a screened four-wire cable. The
measured value from the slave sensor is read in and factored into the
calculations. Power supply and parameter adjustment are carried out
through the master sensor.
Electronicdierential
pressure
9
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
Information:
The version "Relative pressure climate-compensated" is not suitable.
You can nd further information in chapter "Combination Master -
Slave " of this operating instructions.
To reach the Safety Integrity Level (SIL) for the electronic dierential
pressure, both instruments must be SIL-qualied.
The electronic dierential pressure measurement is suitable for the
measurement of the following process variables:
• Level
• Flow
• Dierential pressure
• Density
• Interface
• Level, density-compensated
CPT-2x is suitable for applications in virtually all industries. It is used
for the measurement of the following pressure types.
• Gauge pressure
• Absolute pressure
• Vacuum
Measured products are gases, vapours and liquids.
Depending on the process tting and measurement setup, measured
products can be also viscous or contain abrasive substances.
Sensor element is the measuring cell with robust ceramic diaphragm.
The process pressure deects the ceramic diaphragm and causes a
capacitance change in the measuring cell. This capacitance change
is converted into an electrical signal and outputted as measured value
via the output signal.
16 µm
1
2
3
Fig. 3: Conguration of the ceramic measuring cell
1 Process diaphragm
2 Glass joint
3 Base element
The measuring cell is available in two sizes:
Measured variables
Application area
Measured products
Measuring system pres-
sure
10
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
• ø 28 mm with large process and ange connections as well as with
measuring ranges 25 mbar and 100 bar
• ø 17.5 mm with small process ttings
A temperature sensor in the ceramic diaphragm of the ø 28 mm or on
the ceramic base of the ø 17.5 mm measuring cell detects the actual
process temperature. The temperature value is outputted via the
master sensor.
Extreme process temperature jumps are also immediately detected
by the ø 28 mm measuring cell. The values are compared with that of
an additional temperature measurement on the ceramic base body.
Within only a few measuring cycles the intelligent sensor electronics
compensates unavoidable measurement deviations due to tempera-
ture shocks. Such shocks cause (depending on the set damping) only
slight, brief changes to the output signal.
The measuring cell design depends on the selected pressure type.
Relative pressure: the measuring cell is open to the atmosphere.
The ambient pressure is detected in the measuring cell and compen-
sated. It thus has no inuence on the measured value.
Absolute pressure: the measuring cell is evacuated and encapsu-
lated. The ambient pressure is not compensated and does hence
inuence the measured value.
The following presentations show examples for the installation of the
ceramic measuring cell into the process tting and the dierent seal
concepts.
The recessed installation is particularly suitable for applications with
gases, vapours and clear liquids. The measuring cell seal is posi-
tioned laterally as well as in addition in front.
Measuring system tem-
perature
Pressure types
Seal concepts
Recessed installation
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2
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