WIKA CPT-2x series User manual

Operating Instructions
Process pressure transmitter CPT-2x
Process pressure transmitter CPT-2x
4 … 20 mA
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 Permissible process pressure .......................................................................................... 6
2.7 NAMUR recommendations .............................................................................................. 6
2.8 Installation and operation in the USA and Canada ........................................................... 6
3 Product description ................................................................................................................. 7
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 8
3.3 Supplementary cleaning procedures.............................................................................. 12
3.4 Packaging, transport and storage................................................................................... 12
4 Mounting................................................................................................................................. 14
4.1 General instructions ....................................................................................................... 14
4.2 Ventilation and pressure compensation.......................................................................... 15
4.3 Process pressure measurement..................................................................................... 17
4.4 Level measurement........................................................................................................ 19
4.5 External housing ............................................................................................................ 20
5 Connecting to power supply................................................................................................. 21
5.1 Preparing the connection ............................................................................................... 21
5.2 Connecting..................................................................................................................... 22
5.3 Single chamber housing................................................................................................. 23
5.4 Housing IP 66/IP 68 (1 bar) ............................................................................................ 24
5.5 External housing with version IP 68 (25 bar)................................................................... 25
5.6 Switch-on phase............................................................................................................. 26
6 Set up with the display and adjustment module ................................................................ 28
6.1 Insert display and adjustment module............................................................................ 28
6.2 Adjustment system......................................................................................................... 28
6.3 Measured value indication.............................................................................................. 29
6.4 Parameter adjustment - Quick setup .............................................................................. 30
6.5 Parameter adjustment - Extended adjustment................................................................ 30
6.6 Saving the parameterisation data................................................................................... 43
7 Diagnostics and servicing .................................................................................................... 44
7.1 Maintenance .................................................................................................................. 44
7.2 Cleaning - hygienic connection with compression nut .................................................... 44
7.3 Diagnosis function.......................................................................................................... 45
7.4 Rectify faults................................................................................................................... 47
7.5 Exchange process module on version IP 68 (25 bar) ..................................................... 48
7.6 Instrument repair ............................................................................................................ 49

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Contents
WIKA Operating Instructions - Process pressure transmitter CPT-2x
8 Dismount................................................................................................................................. 50
8.1 Dismounting steps.......................................................................................................... 50
8.2 Disposal ......................................................................................................................... 50
9 Supplement ............................................................................................................................ 51
9.1 Technical data ................................................................................................................ 51
9.2 Calculation of the total deviation..................................................................................... 63
9.3 Calculation of the total deviation - Practical example...................................................... 64
9.4 Dimensions .................................................................................................................... 66
9.5 Trademark ...................................................................................................................... 74
Safety instructions for Ex areas
TakenoteoftheExspecic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: 2018-03-05

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
instructionsformaintenance,faultrectication,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
immediate 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qualied
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 documentation 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
The CPT-2x is a pressure transmitter for process pressure and hydro-
static level measurement.
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specications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-specichazards,e.g.vesseloverll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modicationsareexplicitlyforbidden.Forsafety
reasons,onlytheaccessoryspeciedbythemanufacturermustbe
used.
To avoid any danger, the safety approval markings and safety tips on
the device must also be observed and their meaning read in this oper-
ating instructions manual.

6
2 For your safety
WIKA Operating Instructions - Process pressure transmitter CPT-2x
2.5 EU conformity
ThedevicefullsthelegalrequirementsoftheapplicableEUdirec-
tives.ByaxingtheCEmarking,weconrmtheconformityofthe
instrument with these directives.
2.6 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speciedonthetypelabel
with "Process pressure", see chapter "Conguration".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.
2.7 NAMUR recommendations
NAMUR is the automation technology user association in the process
industry in Germany. The published NAMUR recommendations are
acceptedasthestandardineldinstrumentation.
ThedevicefullstherequirementsofthefollowingNAMURrecom-
mendations:
• NE 21 – Electromagnetic compatibility of equipment
• NE 43 – Signal level for fault information from measuring transduc-
ers
• NE53–Compatibilityofelddevicesanddisplay/adjustment
components
• NE107-Self-monitoringanddiagnosisofelddevices
For further information see www.namur.de.
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
A Class 2 power supply unit has to be used for the installation in the
USA and Canada.

7
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
3 Product description
3.1 Conguration
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
1
10
11
13
12
4
5
2
6
3
7
8
9
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Field for approvals
3 Signal output and voltage supply
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
This operating instructions manual applies to the following instrument
versions:
• Hardware from 1.0.0
• Software from 1.3.2
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
• Documentation
– Operating instructions CPT-2x
– Characteristicstestcerticate
– Instructions for optional instrument features
– Ex-specic"Safety instructions" (with Ex versions)
Type label
Scope of this operating
instructions manual
Scope of delivery

8
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
– Ifnecessary,furthercerticates
Note:
Optional instrument features are also described in this operating
instructions manual.The respective scope of delivery results from the
orderspecication.
3.2 Principle of operation
The CPT-2x is suitable for the measurement of the following process
variables:
• Process pressure
• Level
Fig. 2: Process pressure measurement CPT-2x
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deects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.
Measured variables
Application area
Measured products
Measuring system pres-
sure

9
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
16 µm
1
2
3
Fig. 3: Conguration of the ceramic measuring cell
1 Process diaphragm
2 Glass joint
3 Base element
Themeasuringcellisavailableintwosizes:
• 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inuenceonthemeasuredvalue.
Absolute pressure: the measuring cell is evacuated and encapsu-
lated.The ambient pressure is not compensated and does hence
inuencethemeasuredvalue.
The following presentations show examples for the installation of the
ceramicmeasuringcellintotheprocessttingandthedierent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

10
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
1
2
5
6
3
4
Fig. 4: Recessed installation of the measuring cell (example: manometer con-
nection G½)
1 Measuring cell
2 Seal for the measuring cell
3 Additional, front seal for measuring cell
4 Diaphragm
5 Process tting
6 Seal for the process tting
Thefront-ushinstallationisparticularlysuitableforapplicationswith
viscous and abrasive media and in case of buildup. The measuring
cell seal is positioned laterally.
2
3
4
1
5
Fig. 5: Front-ush installation of the measuring cell (example: thread G1½)
1 Seal for the process tting
2 Measuring cell
3 Seal for the measuring cell
4 Process tting
5 Diaphragm
Thecompletelyfront-ushmountingisparticularlysuitableforap-
plicationsinthepaperindustry.Thediaphragmisinthepulpow,is
hence cleaned and protected against buildup.
Front-ushmountingwith
single seal
Completelyfront-ush
mounting with single seal

11
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
1
2
3
4
5
Fig. 6: Front-ush installation of the measuring cell (example: M30 x 1.5)
1 Measuring cell
2 Seal for the measuring cell
3 Seal for the process tting
4 Process tting
5 Diaphragm
Thefront-ushinstallationisparticularlysuitableforapplicationswith
viscous media.The additional, front sealing protects the glass joint
of the measuring cell against chemical attack and the measuring cell
electronicsagainstdiusionofaggressivegasesfromtheprocess.
1
2
3
45
Fig. 7: Front-ush installation of the measuring cell with double seal (example:
ange connection with extension)
1 Measuring cell
2 Seal for the measuring cell
3 Process tting
4 Additional, front seal for measuring cell
5 Diaphragm
Thefront-ush,hygienicinstallationofthemeasuringcellisparticu-
larly suitable for food applications. The sealings are installed gap-free.
The form seal of the measuring cell protects also the glass joint.
1
2
3
4
5
Fig. 8: Hygienic installation of the measuring cell (example: hygienic tting with
compression nut)
1 Measuring cell
2 Form seal for the measuring cell
3 Gap-free seal for process tting
4 Process tting
5 Diaphragm
Front-ushmountingwith
double seal
Installation in hygienic
tting

12
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
Thefront-ush,hygienicinstallationofthemeasuringcellacc.to3A
is particularly suitable for food applications.The sealings are installed
gap-free. The additional front sealing for the measuring cell protects
alsotheglassjoint.Aholeintheprocessttingisusedforleakage
detection.
1
62
3
4
5
Fig. 9: Hygienic installation of the measuring cell acc. to 3-A (example: Clamp
connection)
1 Measuring cell
2 Seal for the measuring cell
3 Process tting
4 Additional, front seal for measuring cell
5 Diaphragm
5 Hole for leakage detection
3.3 Supplementary cleaning procedures
The CPT-2x is also available in the version "Oil, grease and silicone-
free".These instruments have passed through a special cleaning
procedure to remove oil, grease and paint-wetting impairment sub-
stances (PWIS).
The cleaning is carried out on all wetted parts as well as on surfaces
accessible from outside. To keep the purity level, the instruments are
immediately packed in plastic foil after the cleaning process.The
purity level remains as long as the instrument is kept in the closed
original packaging.
Caution:
The CPT-2x in this version may not be used in oxygen applications.
For this purpose, instruments are available in the special version "Oil
and grease-free for oxygen applications".
3.4 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Installation in hygienic
ttingacc.to3-A
Packaging
Transport
Transport inspection

13
3 Product description
WIKA Operating Instructions - Process pressure transmitter CPT-2x
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter "Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and
approved equipment must be used for lifting and carrying.
Storage
Storage and transport
temperature
Lifting and carrying

14
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
4 Mounting
4.1 General instructions
Make sure before mounting that all parts of the instrument exposed to
the process are suitable for the existing process conditions.
These are mainly:
• Active measuring component
• Processtting
• Process seal
Process conditions in particular are:
• Process pressure
• Process temperature
• Chemical properties of the medium
• Abrasionandmechanicalinuences
Youcannddetailedinformationontheprocessconditionsinchapter
"Technical data" as well as on the type label.
The instrument is suitable for standard and extended ambient condi-
tions acc. to IEC/EN 61010-1.
Protect your instrument against moisture ingress through the following
measures:
• Use a suitable connection cable (see chapter "Connecting to
power supply")
• Tighten the cable gland or plug connector
• Whenmountinghorizontally,turnthehousingsothatthecable
gland or plug connector point downward
• Lead the connection cable downward in front of the cable entry or
plug connector
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
Makesurethatthedegreeofcontaminationspeciedinchapter
"Technical data" meets the existing ambient conditions.
Oninstrumentswiththreadedtting,thehexagonmustbetightened
withasuitablewrench.Fortheproperwrenchsizeseechapter
"Dimensions".
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
If there is strong vibration at the mounting location, the instrument
version with external housing should be used. See chapter "External
housing".
Suitability for the process
conditions
Suitability for the ambient
conditions
Protection against mois-
ture
Screwing in
Vibrations

15
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
The permissible process pressure range is stated on the type label.
The instrument should only be operated with these pressures if the
mountingaccessoryusedalsofullsthesevalues.Thisshouldbeen-
suredbysuitableanges,weldedsockets,tensionringswithClamp
connections, sealings, etc.
Higher process temperatures often mean also higher ambient
temperatures. Make sure that the upper temperature limits stated in
chapter "Technical data" for the environment of the electronics hous-
ing and connection cable are not exceeded.
1
2
Fig. 10: Temperature ranges
1 Process temperature
2 Ambient temperature
4.2 Ventilation and pressure compensation
Thelterelementintheelectronicshousinghasthefollowingfunc-
tions:
• Ventilation of the electronics housing
• Atmospheric pressure compensation (with relative pressure meas-
uring ranges)
Caution:
Thelterelementcausesatime-delayedpressurecompensation.
When quickly opening/closing the housing cover, the measured value
can change for approx. 5 s by up to 15 mbar.
Foraneectiveventilation,thelterelementmustbealwaysfreefrom
buildup.Incaseofhorizontalmounting,turnthehousingsothatthe
lterelementpointsdownwardaftertheinstrumentisinstalled.This
provides better protection against buildup.
Caution:
Donotuseahigh-pressurecleaner.Thelterelementcouldbedam-
aged, which would allow moisture into the housing.
Thefollowingparagraphsdescribehowthelterelementisarranged
inthedierentinstrumentversions.
Process pressure range -
Mounting accessory
Temperature limits
Filter element - Function

16
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
1 2 3
6
6
6 6
6
5
4
Fig. 11: Position of the lter element
1 Plastic, stainless steel single chamber (precision casting)
2 Aluminium - single chamber
3 Stainless steel single chamber (electropolished)
4 Plastic double chamber
5 Aluminium - double chamber
6 Filter element
With the following instruments a blind plug is installed instead of the
lterelement:
• Instruments in protection IP 66/IP 68 (1 bar) - ventilation via capil-
laries in non-detachable cable
• Instruments with absolute pressure
→ Turnthemetalringinsuchawaythatthelterelementpoints
downward after installation of the instrument.This provides better
protection against buildup.
1
2
Fig. 12: Position of the lter element - Ex-d version
1 Rotatable metal ring
2 Filter element
Instruments with absolute pressure have a blind plug mounted
insteadofthelterelement.
Filter element - Position
Filter element - Position
Ex-d version

17
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
1
Fig. 13: Position of the lter element - IP 69K version
1 Filter element
Instruments with absolute pressure have a blind plug mounted
insteadofthelterelement.
The Second Line of Defense (SLOD) is a second level of the process
separation in form of a gas-tight leadthrough in the housing neck,
preventing products from penetrating into the housing.
With these instruments, the process assembly is completely en-
capsulated. An absolute pressure measuring cell is used so that no
ventilation is required.
With relative pressure measuring ranges, the ambient pressure is
detected and compensated by a reference sensor in the electronics.
1
2
1
2
Fig. 14: Position of the lter element - gastight leadthrough
1 Filter element
2 Gas-tight leadthrough
4.3 Process pressure measurement
Keep the following in mind when setting up the measuring system:
• Mount the instrument above the measuring point
Possiblecondensationcanthendrainointotheprocessline.
Filter element - Position
IP 69K version
Filter element - Position
Second Line of Defense
Measurement setup in
gases

18
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
1
2
3
Fig. 15: Measurement setup for process pressure measurement of gases in
pipelines
1 CPT-2x
2 Blocking valve
3 Pipeline
Keep the following in mind when setting up the measuring system:
• Connect via a siphon
• Do not insulate the siphon
• Fill the siphon with water before setup
1
4
3
2
1
2
3
4
Fig. 16: Measurement setup with process pressure measurement of gases in
pipelines
1 CPT-2x
2 Blocking valve
3 Siphon in U or circular form
4 Pipeline
A protective accumulation of water is formed through condensation
in the pipe bends. Even in applications with hot steam, a medium
temperature < 100 °C on the transmitter is ensured.
Measurement setup in
vapours

19
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
Keep the following in mind when setting up the measuring system:
• Mount the instrument below the measuring point
Theeectivepressurelineisalwayslledwithliquidandgasbubbles
can bubble up to the process line.
3
1
2
Fig. 17: Measurement setup for process pressure measurement of liquids in
pipelines
1 CPT-2x
2 Blocking valve
3 Pipeline
4.4 Level measurement
Keep the following in mind when setting up the measuring system:
• Mount the instrument below the min. level
• Donotmounttheinstrumentclosetothellingstreamoremptying
area
• Mount the instrument so that it is protected against pressure
shocks from the stirrer
Fig. 18: Measurement setup for level measurement
Measurement setup in
liquids
Measurement setup

20
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
4.5 External housing
1
2
3
4
5
Fig. 19: Conguration, process module, external housing
1 Pipeline
2 Process module
3 Connection cable process assembly - External housing
4 External housing
5 Signal cable
1. Mark the holes according to the following drilling template
2. Fasten wall mounting plate with 4 screws
90 mm
(3.54")
R 3,5 mm
(0.14")
3mm
(0.12")
70 mm
(2.76")
8 mm
(0.32")
93 mm
(3.66")
110 mm
(4.33")
Fig. 20: Drilling template - wall mounting plate
Conguration
Mounting