WIKA CPT-2x Operating Instructions Manual
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WIKA CPT-2x Operating Instructions Manual

Process pressure transmitter
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Operating Instructions
Process pressure transmitter CPT-2x
Slave for electronic differential pressure
Ceramic sensor
Process pressure transmitter CPT-2x

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Summary of Contents for WIKA CPT-2x

  • Page 1 Operating Instructions Process pressure transmitter CPT-2x Slave for electronic differential pressure Ceramic sensor Process pressure transmitter CPT-2x...

  • Page 2: Table Of Contents

    Cleaning - hygienic connection with compression nut ............ 46 Rectify faults ........................47 Exchange process module on version IP68 (25 bar) ............47 Instrument repair ......................48 Dismount..........................49 Dismounting steps......................49 Disposal ......................... 49 Supplement ..........................50 WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 3 Take note of the Ex specific safety instructions for Ex applications. These instructions are attached as documents to each instrument with Ex approval and are part of the operating instructions. Editing status: 2020-05-12 WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 4: About This Document

    The dot set in front indicates a list with no implied sequence. 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. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 5: For Your Safety

    During work on and with the device, the required personal protective equipment must always be worn. Appropriate use CPT-2x is a slave sensor for electronic differential pressure measure- ment. You can find detailed information about the area of application in chapter "Product description".

  • Page 6: Installation And Operation In The Usa And Canada

    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. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 7: Product Description

    On the type plate of the electronics module • In the adjustment menu under "Info" Type label The type label contains the most important data for identification and use of the instrument: WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 8: Principle Of Operation

    Serial number of the instrument Symbol of the device protection class ID numbers, instrument documentation Principle of operation Application area CPT-2x is suitable for applications in virtually all industries. It is used for the measurement of the following pressure types. • Gauge pressure •...
  • Page 9 The process pressure deflects the ceramic diaphragm and causes a capacitance change in the measuring cell. This capacitance change is converted into an electrical signal and output as measured value via the output signal. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 10 The measuring cell seal is posi- tioned laterally as well as in addition in front. At temperatures above 100 °C the function is automatically deactivated, at temperatures below 95 °C it is automatically reactivated. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 11 The completely front-flush mounting is particularly suitable for ap- mounting with single seal plications in the paper industry. The diaphragm is in the pulp flow, is hence cleaned and protected against buildup. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 12 The form seal of the measuring cell protects also the glass joint. Fig. 8: Hygienic installation of the measuring cell (example: hygienic fitting with compression nut) Measuring cell Form seal for the measuring cell Gap-free seal for process fitting Process fitting Diaphragm WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 13: Supplementary Cleaning Procedures

    Diaphragm Hole for leakage detection 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).
  • Page 14 Technical data - Ambient conditions" • Relative humidity 20 … 85 % Lifting and carrying With instrument weights of more than 18 kg (39.68 lbs) suitable and approved equipment must be used for lifting and carrying. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 15: Mounting

    Screwing in Devices with threaded fitting are screwed into the process fitting with a suitable wrench via the hexagon. See chapter "Dimensions" for wrench size. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 16 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. Fig. 10: Temperature ranges Process temperature Ambient temperature WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 17: Instructions For Oxygen Applications

    Do not use a high-pressure cleaner. The filter element could be dam- aged, which would allow moisture into the housing. The following paragraphs describe how the filter element is arranged in the different instrument versions. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 18 The process assembly of instruments with Second Line of Defense Line of Defense (gastight leadthrough) is completely encapsulated. An absolute pres- sure measuring cell is used so that no ventilation is required. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 19: Combination Master - Slave

    Measurement result = Measured value of Master (total pres- sure) - measured value of Slave (static pressure) Depending on the application, individual combinations can result, see following examples: Example - large vessel Data Application: Level measurement Medium: Water WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 20: Level Measurement

    Keep the following in mind when setting up the measuring system: • Mount the master sensor below the min. level • Do not mount the master sensor close to the filling stream or emptying area WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 21: 4.6 Differential Pressure Measurement

    Take note of the following instructions for the measurement setup, for example in gases: • Mount the instruments above the measuring point Possible condensation can then drain off into the process line. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 22: Interface Measurement

    The mounting distance h of the two sensors should be at least 10 %, better 20 %, of the final value of the sensor measuring range. A bigger distance increases the accuracy of the interface measurement. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 23: Density Measurement

    The master/slave combination is suitable for density measurement. Requirements for a functioning measurement are: • Vessel with changing level • Distance between the measurement points as large as possible • Level always above the upper measuring point WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 24: Density-Compensated Level Measurement

    Mount the master sensor below the min. level • Mount the slave sensor above the master sensor • Mount both sensors away from the filling stream and emptying and protected against pressure shocks from the stirrer WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 25 The density-compensated level measurement is only possible in open, i.e. unpressurized vessels. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 26: 4.10 External Housing

    4 Mounting 4.10 External housing Configuration Fig. 20: Configuration, process module, external housing Pipeline Process module Connection cable process assembly - External housing External housing Signal cable WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 27: Connecting To Power Supply

    On plastic housings, the NPT cable gland or the Conduit steel tube must be screwed into the threaded insert without grease. Max. torque for all housings, see chapter "Technical data". WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 28: Connecting

    6. Check the hold of the wires in the terminals by lightly pulling on them 7. Connect the shielding to the internal ground terminal, connect the external ground terminal to potential equalisation WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 29: Single Chamber Housing

    To the Master sensor Ground terminal for connection of the cable screening Connect shielding here. Connect ground terminal on the outside of the hous- ing to ground as prescribed. The two terminals are galvanically connected. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 30: External Housing With Version Ip68 (25 Bar)

    5 Connecting to power supply External housing with version IP68 (25 bar) Overview Fig. 23: CPT-2x in IP68 version 25 bar with axial cable outlet, external housing Transmitter Connection cable External housing Electronics and connec- tion compartment for power supply 4...20mA...
  • Page 31 To the Master sensor Ground terminal for connection of the cable screening Connect shielding here. Connect ground terminal on the outside of the hous- ing to ground as prescribed. The two terminals are galvanically connected. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 32: Connection Example

    Connection between master and sensor is carried out according to the table: Master sensor Slave sensor Terminal 5 Terminal 5 Terminal 6 Terminal 6 Terminal 7 Terminal 7 Terminal 8 Terminal 8 WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 33: Set Up With The Display And Adjustment Module

    6.1.1 Setup Application In this menu item you activate/deactivate the slave sensor for elec- tronic differential pressure and select the application. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 34 6 Set up with the display and adjustment module The CPT-2x in conjunction with a slave sensor can be used for flow, differential pressure, density and interface measurement. The default setting is differential pressure measurement. Switchover is carried out in the adjustment menu.
  • Page 35 The position correction can be repeated any number of times. Adjustment CPT-2x always measures pressure independently of the process vari- able selected in the menu item "Application". To output the selected process variable correctly, an allocation of the output signal to 0 % and 100 % must be carried out (adjustment).
  • Page 36 Now select with [->] the menu item "Adjustment", then "Min. adjustment" and confirm with [OK]. 2. Edit the percentage value with [OK] and set the cursor to the requested position with [->]. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 37 The maximum negative pressure must then be entered for the min. adjustment. For linearization, select "bidirectional" or "bidirectional-extracted by root" accordingly, see menu item "Liner- arization". The min. adjustment is finished. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 38 1. Select with [->] the menu item Span adjustment and confirm with [OK]. 2. Edit the mbar value with [OK] and set the cursor to the requested position with [->]. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 39 2. Edit the percentage value with [OK] and set the cursor to the requested position with [->]. 3. Set the requested percentage value with [+] and save with [OK]. The cursor jumps now to the density value. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 40 2. Edit the percentage value with [OK] and set the cursor to the requested position with [->]. 3. Set the requested percentage value with [+] and save with [OK]. The cursor jumps now to the height value. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 41 2. Edit the percentage value with [OK] and set the cursor to the requested position with [->]. 3. Set the requested percentage value (e.g. 100 %) with [+] and save with [OK]. The cursor jumps now to the pressure value. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 42 As input signals, the output values of Transducer Block (TB) can be selected. The device assumes an approximately constant temperature and static pressure and calculates the flow rate from the measured differential pressure using the characteristic curve extracted by root. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 43 In menu item "Peak value, pressure", both values are displayed. In another window you can carry out a reset of the peak values separately. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 44 During simulation, the simulated value is output as digital signal. The status message along with the Asset Management function is "Maintenance". Note: Without manual deactivation, the sensor terminates the simulation automatically after 60 minutes. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 45 Furthermore the adjustment for the volume or mass flow at 0 % or 100 % is carried out. The device automatically adds the flow in the selected unit. With appropriate adjustment and bidirectional linearization, the flow rate is counted both positively and negatively. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 46: Diagnosis, Asset Management And Service

    Overview The hygienic connection with compression nut can be disassembled and the diaphragm cleaned. The following graphic shows the structure: Fig. 29: CPT-2x, structure of the hygienic connection with compression nut Hexagon Compression nut Process fitting Process module...

  • Page 47: Rectify Faults

    During exchange, protect the inner side of the parts against contami- nation and moisture. Proceed as follows when carrying out the exchange: 1. Losen the fixing screw with the hexagon key wrench 2. Carefully detach the cable assembly from the process module WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 48: Instrument Repair

    7 Diagnosis, asset management and service Fig. 30: CPT-2x in IP68 version, 25 bar and lateral cable outlet, external housing Process module Plug connector Fixing screw Cable assembly Connection cable External housing 3. Loosen the plug connector 4. Mount the new process module on the measuring point 5.

  • Page 49: Dismount

    Pass the instrument directly on to a specialised recycling company and do not use the municipal collecting points. If you have no way to dispose of the old instrument properly, please contact us concerning return and disposal. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 50: Supplement

    Ʋ Seal between housing and housing lid Silicone SI 850 R, NBR silicone-free Ʋ Inspection window housing cover Polycarbonate (UL-746-C listed), glass Ʋ Ground terminal 316L Glass with Aluminium and stainless steel precision casting housing WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 51 The specifications on the nameplate apply. Nominal measuring ranges and overload capability in bar/kPa Nominal range Overload capability Maximum pressure Minimum pressure Gauge pressure Data on overload capability apply for reference temperature. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 52 0 … 60 bar/0 … 6000 kPa 200 bar/20000 kPa 0 bar abs. 0 … 100 bar/0 … +10000 kPa 200 bar/20000 kPa 0 bar abs. (only for measuring cell ø 28 mm) WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 53 0 … 1450 psi (only for measuring cell ø 28 mm) 2900 psi 0 psi Adjustment ranges Specifications refer to the nominal measuring range, pressure values lower than -1 bar cannot be Level (min./max. adjustment) Ʋ Percentage value -10 … 110 % WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 54 Step response time (ti: 0 s, 10 … 90 %) ≤ 80 ms ≤ 200 ms Damping (63 % of the input variable) 0 … 999 s, adjustable via menu item "Damping" WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 55 The basic temperature error in % from the above graphic can increase due to the additional factors, depending on the measuring cell version (factor FMZ) and the Turn Down (factor FTD). The ad- ditional factors are listed in the following tables. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 56 < 0.5 % x TD Ten years < 0.2 % x TD < 0.4 % x TD < 0.4 % x TD < 1 % x TD without process fitting G½ (ISO 228-1) WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 57 (266 °F) (-104 °F) -40 °C (-104 °F) Fig. 33: Temperature derating CPT-2x, version up to +130 °C (+266 °F) Process temperature Ambient temperature With process fitting PVDF, process temperature max. 100 °C (212 °F). Measuring cell ø 28 mm Measuring cell ø...
  • Page 58 (302 °F) (-104 °F) -40 °C (-104 °F) Fig. 34: Temperature derating CPT-2x, version up to +150 °C (+302 °F) Process temperature Ambient temperature SIP process temperature (SIP = Sterilization in place) Applies to instruments configurations suitable for vapour, i.e. material measuring cell seal EPDM or FFKM (Perlast G75S).
  • Page 59 PE, PUR Ʋ Colour Black Connection cable Slave - Master, electrical data Ʋ Wire cross-section 0.34 mm² (AWG 22) Ʋ Wire resistance < 0.05 Ω/m (0.015 Ω/ft) Breather capillaries not with Ex-d version. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 60: Calculation Of The Total Deviation

    The thermal change of zero signal and output span F is specified in chapter "Technical data". The Galvanic separation between electronics and metal housing parts When used with fulfilled housing protection. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 61: Practical Example

    Level measurement in a small vessel, 500 mm height corresponds to 0.049 bar (4.9 KPa), superim- posed pressure 0.35 bar (35 KPa), medium temperature 40 °C CPT-2x Master and slave sensor each with nominal measuring range 0.4 bar (40 KPa), deviation < 0.1 %, process fitting G1½ (measuring cell ø 28 mm)
  • Page 62 = 0.69 % = 0.16 % (calculation of above table) = √(0.69 %) + (0.16 %) perf = 0.71 % perf - 2. step: Total deviation F total total perf stab WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 63 The example shows that the measurement error in practice can be considerably higher than the basic deviation. Reasons are temperature influence and Turn down. The thermal change of the current output is in this example is negligible. WIKA Operating Instructions - Process pressure transmitter CPT-2x...

  • Page 64: Dimensions

    Fig. 37: Housing versions in protection IP66/IP67 and IP66/IP68 (0.2 bar) Plastic single chamber (IP66/IP67) Aluminium - single chamber Stainless steel single chamber (electropolished) Stainless steel single chamber (precision casting) Stainless steel single chamber (electropolished) IP69K WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 65 (2.76") 8 mm (0.12") (0.32") 110 mm x 90 mm (4.33" x 3.54") Fig. 38: IP68 version with external housing Lateral cable outlet Cable outlet axial Plastic housing Stainless steel housing, electropolished WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 66 G½ A inside G¼ (ISO 228-1) G½ A inside G¼ A PVDF (ISO 228-1) G½ manometer connection (EN 837) volume-reduced ½ NPT inside ¼ NPT M20 x 1.5 manometer connection (EN 837) WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 67 For the version with temperature range up to 150 °C/302 °F, the measure of length increases by 28 mm (1.1 in). For the version with "Second Line of Defense", the measure of length increases by 17 mm (0.67 in). WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 68 For the version with temperature range up to 150 °C/302 °F, the measure of length increases by 28 mm (1.1 in). For the version with "Second Line of Defense", the measure of length increases by 17 mm (0.67 in). WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 69 For the version with temperature range up to 150 °C/302 °F, the measure of length increases by 28 mm (1.1 in). For the version with "Second Line of Defense", the measure of length increases by 17 mm (0.67 in). WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 70 For the version with temperature range up to 150 °C/302 °F, the measure of length increases by 28 mm (1.1 in). For the version with "Second Line of Defense", the measure of length increases by 17 mm (0.67 in). WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 71 41 mm (1.63") 65 mm (2.56") Fig. 44: CPT-2x, connection acc. to IEC 61518 Oval flange adapter Top flange For the version with temperature range up to 150 °C/302 °F, the measure of length increases by 28 mm (1.1 in).

  • Page 72: Trademark

    9 Supplement Trademark All the brands as well as trade and company names used are property of their lawful proprietor/ originator. WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 73 – Level measurement 20, 24 Oxygen applications 17 Parameterization example 35 Peak value indicator 43 Position correction 34 Pressure compensation 19 – Ex d 18 – Second Line of Defense 18 – Standard 18 WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 74 Notes WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 75 Notes WIKA Operating Instructions - Process pressure transmitter CPT-2x...
  • Page 76 All statements concerning scope of delivery, application, practi- cal use and operating conditions of the sensors and processing systems correspond to the information available at the time of printing. WIKA Alexander Wiegand SE & Co. KG Alexander-Wiegand-Straße 30 63911 Klingenberg Germany...

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