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4 Mounting

WIKA Operating Instructions - Differential pressure transmitter DPT-20

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.

4.2 Instructions for oxygen applications

Oxygen and other gases can be explosive when brought into contact

with oils, grease and plastics, so the following measures must also be

taken:

•

All components of the system, e.g. measuring instruments, must

be cleaned in accordance with the requirements of recognized

regulations or standards

•

Depending on the seal material, certain temperatures and pres

sures must not be exceeded in oxygen applications, see chapter "

Technical data

Danger:

Instruments for oxygen applications must be unpacked just before

mounting. After removing the protective cover of the process fitting,

the label "O

" will be visible on the process fitting. Penetration of oil,

grease and dirt should be avoided. Danger of explosion!

4.3 Connection to the process

DP flow elements are installations in pipelines which generate a

flow-dependent pressure drop. The flow rate is measured via this dif

ferential pressure. Typical DP flow elements are Venturi tubes, orifice

plates or impact pressure probes.

Instructions for mounting the DP flow elements are stated in the ap

propriate standards as well as in the documentation from the respec-

tive manufacturer.

Effective pressure lines are pipelines with a small diameter. They are

used to connect the differential pressure transmitter to the pressure

tapping point or the DP flow element.

Principles

Effective pressure lines for gases must always remain completely dry

and no condensate must collect. Effective pressure lines for liquids

must always be completely filled and must not contain any gas bub

bles. Therefore, suitable venting systems must be provided for liquids

and suitable drainage systems for gases.

Wiring

Effective pressure lines must always run with a sufficient, strictly mo

notonous slope/gradient of at least 2 %, but better up to 10 %.
Recommendations for wiring of effective pressure lines are stated in

the corresponding national and international standards.

Connection

Effective pressure lines are connected to the device via standard cut

ting ring screw connections with suitable thread.

Temperature limits

Oxygen applications

DP flow element

Effective pressure lines

Summary of Contents for DPT-20

Page 1: ...Operating Instructions Differential pressure transmitter DPT 20 Differential pressure transmitter DPT 20 Foundation Fieldbus Metallic measuring cell ...

Page 2: ...13 4 2 Instructions for oxygen applications 15 4 3 Connection to the process 15 4 4 Mounting and connection instructions 16 4 5 Measurement setups 18 5 Connecting to the bus system 27 5 1 Preparing the connection 27 5 2 Connecting 28 5 3 Wiring plans 29 5 4 Switch on phase 33 6 Set up the sensor with the display and adjustment module 34 6 1 Insert display and adjustment module 34 6 2 Adjustment sy...

Page 3: ...evice communication Foundation Fieldbus 76 10 3 Calculation of the total deviation 77 10 4 Calculation of the total deviation Practical example 78 10 5 Dimensions versions process component 79 10 6 Trademark 85 Safety instructions for Ex areas Take note of the Ex specific safety instructions for Ex applications These instructions are attached as documents to each instrument with Ex approval and ar...

Page 4: ...Symbols used Information note tip This symbol indicates helpful additional infor mation and tips for successful work Note This symbol indicates notes to prevent failures malfunctions damage to devices or plants Caution Non observance of the information marked with this symbol may result in personal injury Warning Non observance of the information marked with this symbol may result in serious or fa...

Page 5: ...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 flawless 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 oper...

Page 6: ...com mendations NE 21 Electromagnetic compatibility of equipment NE 53 Compatibility of field devices and display adjustment components NE 107 Self monitoring and diagnosis of field devices For further information see www namur de 2 7 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...

Page 7: ...rom the order specification This operating instructions manual applies to the following instrument versions Hardware from 1 0 0 Software version from 1 2 1 Note You can find 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 type label contains the most important data for identification and use of the ins...

Page 8: ...superim posed pressure vessels The static pressure is compensated by differ ential pressure measurement It is available as a separate measured value for digital signal outputs Fig 2 Level measurement with DPT 20 in a pressurized vessel The flow measurement is carried out via an effective pressure trans mitter such as an orifice plate or pitot tube The device records the resulting pressure differen...

Page 9: ...nstrument density measurement in a vessel with changing level and homogeneous density distribution can be easily realized The instrument is connected to the vessel via a chemical seal at two different measuring points Fig 5 Density measurement with DPT 20 The instrument can also be used for interface measurement in a ves sel with changing level The instrument is connected to the vessel via a chemi...

Page 10: ... signals P P 5 4 6 6 3 2 1 Fig 7 Configuration metallic measuring cell 1 Filling fluid 2 Temperature sensor 3 Absolute pressure sensor static pressure 4 Overload system 5 Differential pressure sensor 6 Separating diaphragm 3 3 Supplementary cleaning procedures The DPT 20 is also available in the version Oil grease and silicone free These instruments have passed through a special cleaning procedure...

Page 11: ...e 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 Techni...

Page 12: ...12 3 Product description WIKA Operating Instructions Differential pressure transmitter DPT 20 ...

Page 13: ...anently applied on one side In order to prevent damage to the device a test pressure acting on both sides may only exceed the specified MWP briefly by 1 5 times at reference temperature The pressure stage of the process fitting as well as the overload resistance of the measuring cell are taken into consideration here see chapter Technical Data In addition a temperature derating of the process fitt...

Page 14: ... op eration A high pressure cleaner may not be used for cleaning For better readability of the display or access to the wiring the elec tronics housing can be rotated by 330 A stop prevents the housing from being turned too far Depending on the version and housing material the locking screw on the neck of the housing must be slightly loosened The housing can then be turned to the correct position ...

Page 15: ...ipelines which generate a flow dependent pressure drop The flow rate is measured via this dif ferential pressure Typical DP flow elements are Venturi tubes orifice plates or impact pressure probes Instructions for mounting the DP flow elements are stated in the ap propriate standards as well as in the documentation from the respec tive manufacturer Effective pressure lines are pipelines with a sma...

Page 16: ...rque see chapter Technical data Note Use the supplied parts and seal the thread with four layers of PTFE tape 4 4 Mounting and connection instructions When connecting DPT 20 to the measuring point take note of the high low pressure side of the process component 1 The H identifies the high pressure side the low pressure side due to an L on the process component next to the oval flanges Note The sta...

Page 17: ...3 fold valve block 1 Process fitting 2 Process fitting 3 Inlet valve 4 Inlet valve 5 Breather valve A A 2 2 1 3 4 5 Fig 11 Connection of a 3 fold valve block flanging on both sides 1 Process fitting 2 Process fitting 3 Inlet valve 4 Inlet valve 5 Breather valve 3 fold valve block 3 fold valve block flang ing on both sides ...

Page 18: ...ess fitting 3 Inlet valve 4 Breather valve 5 Inlet valve 6 Valve for checking ventilating 7 Valve for checking ventilating 4 5 Measurement setups 4 5 1 Overview The following sections show common measurement setups Level Flow Differential pressure Interface Density Depending on the application there may also be different arrange ments Note For simplification the effective pressure lines are partly...

Page 19: ...lation of separators and drain valves is recom mended Debris and sediment can thus be collected and removed min max 1 3 4 3 4 5 2 1 Fig 13 Measurement setup level measurement in closed vessel 1 Blocking valves 2 3 fold valve block 3 Precipitator 4 Drain valves 5 DPT 20 Mount device directly to the vessel Always connect the low pressure side above the max level in the vessel For measurement in prod...

Page 20: ...eal min max 1 Fig 15 Measurement setup level measurement in closed vessel 1 DPT 20 Mount device below the lower measurement connection so that the effective pressure lines are always filled with liquid Always connect the low pressure side above the max level in the vessel The condensate vessel ensures a constant pressure on the low pressure side For measurement in products with solid content such ...

Page 21: ...l with superimposed steam 1 Condensate vessel 2 Blocking valves 3 3 fold valve block 4 Precipitator 5 Drain valves 6 DPT 20 4 5 3 Flow 3 2 1 Fig 17 Measurement setup with flow measurement of gases connection via 3 fold valve block flanging on both sides 1 Orifice or impact pressure probe 2 3 fold valve block flanging on both sides 3 DPT 20 In gases ...

Page 22: ...rs 1 Condensate vessels 2 Orifice or impact pressure probe 3 Blocking valves 4 3 fold valve block 5 Drain or blow off valves 6 DPT 20 Mount device below the measurement loop so that the effective pressure lines are always filled with liquid and gas bubbles can bubble up to the process line For measurements in products with solid content such as e g dirty liquids the installation of separators and ...

Page 23: ...20 4 5 4 Differential pressure Mount device above the measurement loop so that condensate can drain off in the process cable 1 1 2 2 3 4 Fig 20 Measurement setup with differential pressure measurement between two pipelines in gases and vapours 1 Pipelines 2 Blocking valves 3 3 fold valve block 4 DPT 20 Mount device below the measurement loop so that some conden sate can collect in the effective pr...

Page 24: ... always filled with liquid and gas bubbles can bubble up to the process line For measurement in products with solid content such as e g dirty liquids the installation of separators and drain valves is recom mended Debris and sediment can thus be collected and removed 1 2 4 5 6 3 4 5 2 Fig 22 Measurement setup with differential pressure measurement in liquids 1 e g filter 2 Blocking valves 3 3 fold...

Page 25: ...e as large as possible to ensure a high measurement accuracy The ambient temperature should be the same for both capillaries p h g 0 3 m Fig 24 Measurement setup for density measurement Density measurement is only possible when the level remains above the upper measuring point If the level falls below the upper meas uring point the measuring system continues to work with the last density value Thi...

Page 26: ...rement is only possible if the densities of the two media remain the same and the interface is between the two meas urement points The total level must be above the upper measurement point This density measurement functions with open but also with closed vessel Distance between the two measurement points 0 3 m min density 800 kg m max density 1000 kg m Carry out min adjustment for the differential...

Page 27: ...carried out according to the Fieldbus specification In particular make sure that the bus is termi nated with suitable terminating resistors Metric threads In the case of instrument housings with metric thread the cable glands are screwed in at the factory They are sealed with plastic plugs as transport protection Note You have to remove these plugs before electrical connection NPT thread In the ca...

Page 28: ...ock with a small screwdriver and pull it out When reinserting the terminal block you should hear it snap in Proceed as follows 1 Unscrew the housing lid 2 If a display and adjustment module is installed remove it by turn ing it slightly to the left 3 Loosen compression nut of the cable gland and remove blind plug 4 Remove approx 10 cm 4 in of the cable mantle strip approx 1 cm 0 4 in of insulation...

Page 29: ...housing lid back on The electrical connection is finished 5 3 Wiring plans 5 3 1 Single chamber housing The following illustration applies to the non Ex Ex ia and Ex d ver sion 1 2 1 5 0 1 0 1 6 7 8 Bus 2 3 4 5 Fig 27 Electronics and connection compartment single chamber housing 1 Voltage supply signal output 2 Contact pins for the display and adjustment module or interface adapter 3 Simulation sw...

Page 30: ...ent 2 Contact pins for the display and adjustment module or interface adapter 3 Simulation switch 1 mode for simulation release Bus 5 1 2 6 7 8 2 3 4 1 Fig 29 Connection compartment double chamber housing 1 Voltage supply signal output 2 For display and adjustment module or interface adapter 3 For external display and adjustment unit 4 Ground terminal for connection of the cable screening Electron...

Page 31: ...tion switch 1 mode for simulation release Bus 5 1 2 6 7 8 2 3 4 1 Fig 31 Connection compartment double chamber housing 1 Voltage supply signal output 2 For display and adjustment module or interface adapter 3 For external display and adjustment unit 4 Ground terminal for connection of the cable screening 5 3 4 Housing IP66 IP68 1 bar 1 2 Fig 32 Wire assignment in permanently connected connection c...

Page 32: ...3 Electronics and connection compartment 1 Electronics module 2 Cable gland for voltage supply 3 Cable gland for connection cable transmitter 1 2 3 4 6 3 4 1 2 5 Fig 34 Connection of the process component in the housing base 1 Yellow 2 White 3 Red 4 Black 5 Shielding 6 Breather capillaries Electronics and connec tion compartment for power supply Terminal compartment housing socket ...

Page 33: ...for simulation release 4 For external display and adjustment unit 5 Ground terminal for connection of the cable screening 5 4 Switch on phase After connecting the instrument to power supply or after a voltage recurrence the instrument carries out a self check Internal check of the electronics Indication of a status message on the display or PC Then the actual measured value is output to the signal...

Page 34: ...ositions each displaced by 90 It is not necessary to interrupt the power supply Proceed as follows 1 Unscrew the housing lid 2 Place the display and adjustment module on the electronics in the desired position and turn it to the right until it snaps in 3 Screw housing lid with inspection window tightly back on Disassembly is carried out in reverse order The display and adjustment module is powered...

Page 35: ...onnection compartment Note If you intend to retrofit the instrument with a display and adjustment module for continuous measured value indication a higher lid with an inspection glass is required 6 2 Adjustment system 1 2 Fig 38 Display and adjustment elements 1 LC display 2 Adjustment keys OK key Move to the menu overview Confirm selected menu Edit parameter Save value key Change measured value p...

Page 36: ...age is then switched over to English Approx 60 minutes after the last pressing of a key an automatic reset to measured value indication is triggered Any values not confirmed with OK will not be saved 6 3 Measured value indication With the key you can move between three different indication modes In the first view the selected measured value is displayed in large digits In the second view the selec...

Page 37: ...ividual steps in the quick setup guide of the sensor You can find Extended adjustment in the next sub chapter 6 5 Parameter adjustment Extended adjustment For technically demanding measuring points you can carry out extended settings in Extended adjustment The main menu is divided into five sections with the following func tions Setup Settings e g for measurement loop name application units positi...

Page 38: ...adjustment steps are important There you can find the individual adjustment steps Enter the requested parameters via the appropriate keys save your settings with OK and jump to the next menu item with the ESC and the key Unit of measurement In this menu item the adjustment units of the instrument are deter mined The selection determines the unit displayed in the menu items Min adjustment Zero and ...

Page 39: ... measured value is accepted as the correction value This value must not be influ enced corrupted by product coverage or static pressure In case of a manual position correction the offset value is determined by the user Select for this purpose the function Edit and enter the requested value After the position correction is carried out the actual measured value is corrected to 0 The corrective value...

Page 40: ...ecause the min max adjustment is always carried out without changing the product level These settings can be made ahead of time without the instrument having to be installed Note If the adjustment ranges are exceeded the entered value will not be accepted Editing can be interrupted with ESC or corrected to a value within the adjustment ranges For the other process variables such as e g process pre...

Page 41: ...mps now to the pressure value 4 Enter the pressure value for the full vessel e g 900 mbar cor responding to the percentage value 5 Save settings with OK The max adjustment is finished For an adjustment with filling simply enter the actual measured value indicated at the bottom of the display Proceed as follows 1 Select the menu item Setup with and confirm with OK Now select with the menu item Min ...

Page 42: ...nu item Setup with and confirm with OK Now select with the menu item Zero adjustment and con firm with OK 2 Edit the mbar value with OK and set the cursor to the requested position with 3 Set the requested mbar value with and store with OK 4 Change with ESC and to the span adjustment The zero adjustment is finished Information The Zero adjustment shifts the value of the span adjustment The span i ...

Page 43: ...he menu item Setup with and confirm with OK Now select with the menu item Min adjustment and con firm with OK 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 4 Enter the min density corresponding to the percentage value 5 Save settings with OK and move with ESC...

Page 44: ... with the menu item Min adjustment and con firm with OK 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 4 Enter the min height of the interface corresponding to the per centage value 5 Save settings with OK and move with ESC and to the max adjustment The min adj...

Page 45: ...een the measured value percentage and process variable The linearization applies to the measured value indication and the current output Caution Note the following if the respective sensor is used as part of an over fill protection system according to WHG If a linearisation curve is selected the measuring signal is no longer necessarily linear to the filling height This must be considered by the u...

Page 46: ...sh In this menu item you define which measured value is displayed The default setting for the displayed value is Differential pressure In this menu item you define the number of decimal positions with which the measured value is displayed The default setting for the display format is Automatic The display and adjustment module has a backlight for the display In this menu item you can switch on the...

Page 47: ...both values are displayed In another window you can carry out a reset of the peak values separately The respective min and max measured values of the measuring cell and the electronics temperature are stored in the sensor In menu item Peak value temperature both values are displayed In another window you can carry out a reset of the two peak values separately In this menu item you can simulate mea...

Page 48: ...shipment from the factory incl the order specific settings Any user defined linearisation curve as well as the measured value memory are deleted Basic settings Resets the parameter settings incl special param eters to the default values of the respective instrument Any pro grammed linearisation curve as well as the measured value memory are deleted Totalizer 1 and 2 Reset of the summarized flow vo...

Page 49: ...e in C Metallic measuring cell Electronics temperature in C Display format 1 and 2 Number of positions after the decimal point automatically Backlight Switched on Diagnostics Menu item Parameter Default value Device status Peak value pressure Actual measured value Peak value temperature Actual temperature values from measuring cell elec tronics Simulation Process pressure Additional adjustments Me...

Page 50: ...tten into one or more sen sors or kept as backup for a possible electronics exchange Note Before the data are saved in the sensor a safety check is carried out to determine if the data match the sensor In the process the sensor type of the source data as well as the target sensor are displayed If the data do not match a fault message is outputted or the function is blocked The data are saved only ...

Page 51: ...he date of factory calibration of the sensor as well as the date of the last change of sensor parameters are displayed via the display and adjustment module or via the PC In this menu item the features of the sensor such as approval pro cess fitting seal measuring range electronics housing and others are displayed 6 6 Saving the parameterisation data We recommended writing down the adjustment data...

Page 52: ...ing Instructions Differential pressure transmitter DPT 20 If the instrument is equipped with a display and adjustment module the parameter adjustment data can be saved therein The procedure is described in menu item Copy device settings In the display and adjust ment module ...

Page 53: ...T 20 A B Blocking valves Proceed as follows 1 Fill the vessel to just above the lower tap 2 Fill measuring system with medium Close valve 3 Separate high low pressure side Open valve A and B Open block valves 3 Vent high pressure side probably empty low pressure side Open valve 2 and 4 Discharge medium on the high pressure side Briefly open valve 6 and 7 then close again Fill the high pressure sid...

Page 54: ... the lower tap 2 Fill measuring system with medium Open valve A and B Open block valves Fill the low pressure effective pressure line on the height of the condensation pot 3 Remove air from instrument Open valve 2 and 4 Discharge medium Open valve 3 Equalisation high and low pressure side Briefly open valve 6 and 7 then close again Fill the measuring instrument completely with the medium and remov...

Page 55: ...ia 3 fold valve block flanging on both sides I DPT 20 II 3 fold valve block 2 4 Inlet valves 3 Breather valve 6 7 Vent valves on DPT 20 A B 1 5 6 7 3 2 4 II I III III Fig 43 Preferred measurement setup for liquids I DPT 20 II 3 fold valve block III Precipitator 1 5 Drain valves 2 4 Inlet valves 3 Breather valve 6 7 Vent valves on DPT 20 A B Blocking valves Proceed as follows Gases Liquids ...

Page 56: ...e side is closed Open valve 3 Equalisation high and low pressure side Briefly open valve 6 and 7 then close again Fill the measuring instrument completely with the medium and remove air 4 Carry out a position correction if the following conditions apply If the conditions are not fulfilled then carry out the position correc tion after step 6 Conditions The process cannot be sealed off The pressure ...

Page 57: ...f voltage interruption Up to 100 000 measured values can be stored in the sensor in a ring memory Each entry contains date time as well as the respective measured value Depending on the instrument version values that can be stored are for example Level Process pressure Differential pressure Static pressure Percentage value Scaled values Current output Lin percent Measuring cell temperature Electro...

Page 58: ...phs 4 1 2 3 Fig 44 Pictographs of the status messages 1 Failure red 2 Out of specification yellow 3 Function check orange 4 Maintenance required blue Failure Due to a malfunction in the instrument a fault message is output This status message is always active It cannot be deactivated by the user Function check The instrument is being worked on the measured value is temporarily invalid for example ...

Page 59: ...s with separate version Bit 13 F080 General software error General software error Disconnect operating voltage briefly Bit 5 F105 Measured value is de termined The instrument is still in the switch on phase the measured value could not yet be deter mined Wait for the end of the switch on phase Bit 6 F113 Communication error Error in the internal instrument communication Disconnect operating voltag...

Page 60: ...ary use an instrument with a higher measuring range Bit 29 Code Text message Cause Rectification DevSpec Diagnosis Bits M500 Error in the delivery status The data could not be restored during the reset to delivery status Repeat reset Load XML file with sensor data into the sensor Bit 15 M501 Error in the non active linearisation table Index markers are not continu ously rising for example illogica...

Page 61: ...ommended that the work be carried out on a clean level surface e g a workbench Caution There is a risk of injury due to residues of process media in the pro cess flanges Take suitable protective measures against this Proceed as follows 1 Loosen hexagon head screws crosswise with wrench 2 Carefully remove the process flanges without damaging the dif ferential pressure measuring cell 3 Lift O ring s...

Page 62: ...ing can be kept Required tools Hexagon key wrench size 2 Caution The exchange may only be carried out in the complete absence of line voltage In Ex applications only a replacement part with appropriate Ex ap proval may be used Caution 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 wi...

Page 63: ... fixing screw with the hexagon key wrench The exchange is finished The necessary serial number can be found on the type label of the instrument or on the delivery note 8 7 Instrument repair You can find information for a return shipment under Service on our local website If a repair is necessary please proceed as follows Complete one form for each instrument If necessary state a contamination Clea...

Page 64: ...recycled by spe cialised recycling companies We use recyclable materials and have designed the electronics to be easily separable WEEE directive The instrument does not fall in the scope of the EU WEEE directive Article 2 of this Directive exempts electrical and electronic equipment from this requirement if it is part of another instrument that does not fall in the scope of the Directive These inc...

Page 65: ...ew plugs 316L Ʋ Ʋ Ventilation valves 316L Internal transmission liquid Ʋ Ʋ Standard applications Silicone oil Ʋ Ʋ Oxygen applications Halocarbon oil 4 Materials non wetted parts Ʋ Ʋ Electronics housing Plastic PBT polyester Alu die casting powder coated 316L Ʋ Ʋ Cable gland PA stainless steel brass Ʋ Ʋ Sealing cable gland NBR Ʋ Ʋ Blind plug cable gland PA Ʋ Ʋ External housing Plastic PBT Polyester...

Page 66: ... 5 Nm 3 688 lbf ft NPT cable glands and Conduit tubes Ʋ Ʋ Plastic housing 10 Nm 7 376 lbf ft Ʋ Ʋ Aluminium Stainless steel housing 50 Nm 36 88 lbf ft Input variable Pressure ranges in bar Pa Nominal range Lower measurement limit Upper measuring limit 10 mbar 1 kPa 10 mbar 3 kPa 10 mbar 3 kPa 30 mbar 3 kPa 30 mbar 3 kPa 30 mbar 3 kPa 100 mbar 10 kPa 100 mbar 10 kPa 100 mbar 10 kPa 500 mbar 50 kPa 5...

Page 67: ...ustment Ʋ Ʋ Pressure value zero 120 120 Ʋ Ʋ Pressure value span 120 120 Switch on phase Start up time with operating voltage UB Ʋ Ʋ 12 V DC 9 s Ʋ Ʋ 12 V DC 22 s Output variable Output signal digital output signal Foundation Fieldbus protocol Transmission rate 31 25 Kbit s Damping 63 of the input variable 0 999 s adjustable Channel Numbers Ʋ Ʋ Channel 1 Process value Ʋ Ʋ Channel 8 Electronics tempe...

Page 68: ...es Dependent on the chemical seal Dependent on the chemical seal Dependent on the chemical seal Version IP68 25 bar additionally 50 ms additionally 150 ms additionally 200 ms Damping 63 of the input variable 0 999 s adjustable via menu item Damping Additional output parameter Measuring cell temperature Range 40 85 C 40 185 F Measuring cell temperature Ʋ Ʋ Resolution 1 K Ʋ Ʋ Deviation 1 K Output of...

Page 69: ... deviation includes the non linearity hysteresis and non reproducibility The values apply to the digital signal output HART Profibus PA Foundation Fieldbus as well as to the analogue current output 4 20 mA For differential pressure they refer to the set span for static pressure to the measuring range final value Turn down TD is the ratio of the nominal measuring range to the set span Differential ...

Page 70: ...2 x TD Influence of the medium or ambient temperature Applies to instruments in basic version with digital signal output Specifications refer to the set span Turn down TD nominal measuring range set span Thermal change zero signal and output span differential pressure11 Measuring range 10 60 C 14 140 F 40 10 C 40 14 F und 60 85 C 140 185 F 10 mbar 1 kPa 0 145 psi 0 15 0 20 x TD 0 4 0 3 x TD 30 mba...

Page 71: ...i 160 bar 16000 kPa 2400 psi 400 bar 4000 kPa 5800 psi 160 bar 16000 kPa 2400 psi 0 10 x TD 400 bar 4000 kPa 5800 psi 0 25 x TD 160 bar 16000 kPa 2400 psi 0 10 400 bar 4000 kPa 5800 psi 0 25 500 mbar 50 kPa 7 3 psi 3 bar 300 kPa 43 51 psi 16 bar 1600 kPa 232 1 psi Long term stability according to DIN 16086 Applies to the respective digital signal output HART Profibus PA Foundation Fieldbus as well...

Page 72: ...0 bar 6000 kPa 1 mbarabs 100 Paabs 30 mbar 3 kPa 100 mbar 10 kPa 160 bar 16000 kPa 160 bar 16000 kPa 240 bar 24000 kPa 500 mbar 50 kPa 160 bar 16000 kPa 400 bar 40000 kPa 160 bar 16000 kPa 400 bar 40000 kPa 240 bar 24000 kPa 630 bar 63000 kPa 3 bar 300 kPa 16 bar 1600 kPa Nominal range Max permissible process pressure MWP Overload unilater al OPL Overload bilateral OPL Min permissible static press...

Page 73: ...0 x 1 5 NPT Ʋ Ʋ Closing cap NPT Material cable gland Seal insert Cable diameter 5 9 mm 6 12 mm 7 12 mm 10 14 mm PA NBR Brass nickel plated NBR Stainless steel NBR Wire cross section spring loaded terminals Ʋ Ʋ Massive wire stranded wire 0 2 2 5 mm AWG 24 14 Ʋ Ʋ Stranded wire with end sleeve 0 2 1 5 mm AWG 24 16 Electromechanical data version IP66 IP68 1 bar Connection cable mechanical data Ʋ Ʋ Con...

Page 74: ...sistance R 0 037 Ω m 0 012 Ω ft Display and adjustment module Display element Display with backlight Measured value indication Ʋ Ʋ Number of digits 5 Adjustment elements Ʋ Ʋ 4 keys OK ESC Protection rating Ʋ Ʋ unassembled IP20 Ʋ Ʋ Mounted in the housing without lid IP40 Materials Ʋ Ʋ Housing ABS Ʋ Ʋ Inspection window Polyester foil Functional safety SIL non reactive Interface to the external displ...

Page 75: ... V AC Conductive connection Between ground terminal and metallic process fitting Electrical protective measures 21 Housing material Version Protection acc to IEC 60529 Protection acc to NEMA Plastic Single chamber IP66 IP67 Type 4X Double chamber Aluminium Single chamber IP66 IP67 IP66 IP68 0 2 bar IP68 1 bar Type 4X Type 6P Double chamber IP66 IP67 IP66 IP68 0 2 bar Type 4X Type 6P Stainless stee...

Page 76: ...d the corresponding device descriptions the electrical characteristics of the bus system as well as the applied function blocks Revisions Data DD Revision Rev_01 CFF File 020101 cff Device Revision 0101 ff0 0101 ff5 Cff Revision xx xx 01 Device software revision 1 1 0 ITK Interoperability Test Kit Number 6 2 0 Electricial Characteristics Physicial Layer Type Low power signaling bus pow ered FISCO ...

Page 77: ...ation Ftotal is the sum of the basic deviation Fperf and the long term stability Fstab Ftotal Fperf Fstab The basic deviation Fperf in turn consists of the thermal change of the zero signal and the output span FT temperature error as well as the deviation FKl Fperf FT 2 FKl 2 The thermal change of the zero signal and output span FT is specified in chapter Technical data This applies initially to t...

Page 78: ...i 0 15 0 20 x TD 0 4 0 3 x TD 30 mbar 3 kPa 0 44 psi 0 15 0 10 x TD 0 2 0 15 x TD 100 mbar 10 kPa 1 5 psi 0 15 0 15 x TD 0 15 0 2 x TD 500 mbar 50 kPa 7 3 psi 0 15 0 05 x TD 0 2 0 06 x TD 3 bar 300 kPa 43 51 psi 16 bar 1600 kPa 232 1 psi 0 15 0 15 x TD 0 15 0 20 x TD FT 0 15 0 05 x TD FT 0 15 0 1 FT 0 25 3 Determination of deviation and long term stability Deviation Measuring range TD 1 1 up to 5 ...

Page 79: ...ab 0 065 x TD Fstab 0 065 x 2 Fstab 0 13 Ftotal 0 26 0 13 0 39 The total percentage deviation of the measurement is thus 0 39 The absolute total deviation is 0 39 of 250 mbar 1 mbar The example shows that in practice the error of use can be significantly higher than the actual measurement error The causes are temperature influence and turn down 10 5 Dimensions versions process component Plastic ho...

Page 80: ...2 M20x1 5 NPT 1 Aluminium single chamber 2 Aluminium double chamber Stainless steel housing 69 mm 2 72 ø 77 mm 3 03 117 mm 4 61 M20x1 5 NPT 59 mm 2 32 ø 80 mm 3 15 112 mm 4 41 M20x1 5 NPT 87 mm 3 43 M16x1 5 ø 84 mm 3 31 120 mm 4 72 M20x1 5 NPT 3 2 1 1 Stainless steel single chamber electropolished 2 Stainless steel single chamber precision casting 3 Stainless steel double chamber housing precision...

Page 81: ...6 IP68 1 bar M20x1 5 NPT M16x1 5 M20x1 5 M20x1 5 120 mm 4 72 105 mm 4 13 116 mm 4 57 150 mm 5 91 ø 84 mm 3 31 ø 84 mm 3 31 3 1 117 mm 4 61 103 mm 4 06 ø 77 mm 3 03 M20x1 5 2 1 Aluminium single chamber 2 Stainless steel single chamber precision casting 3 Aluminium double chamber housing stainless steel double chamber housing precision casting ...

Page 82: ...IP68 25 bar version 1 2 4 3 84 mm 3 31 80 mm 3 15 84 mm 3 31 124 mm 4 88 ø 41 4 mm 1 64 ø 41 6 mm 1 64 90 mm 3 54 110 mm 4 33 66 mm 2 6 59 mm 2 32 51 mm 2 01 110 mm x 90 mm 4 33 x 3 54 Fig 47 External housing 1 Lateral cable outlet 2 Cable outlet axial 3 Plastic single chamber 4 Stainless steel single chamber ...

Page 83: ...elivery 18 NPT IEC 61518 7 16 20 UNF 316L incl 2 vent valves 316L 18 NPT IEC 61518 7 16 20 UNF Alloy C276 2 4819 18 NPT IEC 61518 7 16 20 UNF Super Duplex 2 4410 Lateral ventilation 60 mm 2 36 41 1 mm 1 63 91 mm 3 58 86 1 mm 3 39 80 mm 3 15 54 mm 2 13 Fig 49 DPT 20 lateral ventialtion Connection Fastening Material Scope of delivery 18 NPT IEC 61518 7 16 20 UNF 316L incl 4 closing screws and 2 vent...

Page 84: ...for chemical seal connection 2 3 7 16 20 UNF 1 60 mm 2 36 91 mm 3 58 86 1 mm 3 39 54 mm 2 13 41 1 mm 1 63 86 1 mm 3 39 54 mm 2 13 Fig 50 left Process fitting DPT 20 prepared for chemical seal assembly right Position of the copper ring seal 1 Chemical seal connection 2 Copper ring seal 3 Separating diaphragm ...

Page 85: ... 10 Supplement WIKA Operating Instructions Differential pressure transmitter DPT 20 10 6 Trademark All the brands as well as trade and company names used are property of their lawful proprietor originator ...

Page 86: ...86 Notes WIKA Operating Instructions Differential pressure transmitter DPT 20 ...

Page 87: ...87 Notes WIKA Operating Instructions Differential pressure transmitter DPT 20 ...

Page 88: ...72 132 0 Fax 49 9372 132 406 E mail info wika de www wika de 62236 EN 210112 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 Differential pressure transmitter DPT 20 ...

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WIKA DPT-20, Operating Instructions Manual

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