KROHNE OPTIBAR DP 3050 User manual

Compact differential pressure transmitter for
measuring flow, level and differential pressure
2-wire 4...20 mA HART
2-wire 4...20 mA HART2-wire 4...20 mA HART
2-wire 4...20 mA HART:
ER: from 1.01._
OPTIBAR DP 3050
OPTIBAR DP 3050OPTIBAR DP 3050
OPTIBAR DP 3050 Handbook
HandbookHandbook
Handbook
© KROHNE 04/2020 - 4007695701 - MA OPTIBAR DP 3050 R01 en

All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without
the prior written authorisation of KROHNE Messtechnik GmbH.
Subject to change without notice.
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Copyright 2020 by
KROHNE Messtechnik GmbH - Ludwig-Krohne-Str. 5 - 47058 Duisburg (Germany)
: IMPRINT :::::::::::::::::::::::::::::::::::::::

CONTENTS
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OPTIBAR DP 3050
1 Safety instructions 6
1.1 Software history ............................................................................................................... 6
1.2 Intended use ..................................................................................................................... 7
1.3 Technical limits ................................................................................................................ 8
1.4 Measured products........................................................................................................... 8
1.5 Manufacturer's declaration.............................................................................................. 8
1.6 Safety instructions from the manufacturer ..................................................................... 9
1.6.1 Copyright and data protection ................................................................................................ 9
1.6.2 Disclaimer ............................................................................................................................... 9
1.6.3 Product liability and warranty .............................................................................................. 10
1.6.4 Information concerning the documentation......................................................................... 10
1.6.5 Warnings and symbols used................................................................................................. 11
1.7 Safety instructions for the operator............................................................................... 11
2 Device description 12
2.1 Scope of delivery............................................................................................................. 12
2.2 Device design.................................................................................................................. 13
2.2.1 Connection variants .............................................................................................................. 14
2.3 Nameplates .................................................................................................................... 15
2.4 Terms and abbreviations................................................................................................ 16
3 Installation 17
3.1 General notes on installation ......................................................................................... 17
3.2 Ingress protection for housing....................................................................................... 17
3.3 Packaging ....................................................................................................................... 17
3.4 Storage ........................................................................................................................... 18
3.5 Transport ........................................................................................................................ 18
3.6 Installation specifications .............................................................................................. 18
3.7 Mounting ......................................................................................................................... 19
3.7.1 Opening the device, installing and dismantling the graphic display ................................... 19
3.7.2 Process connections............................................................................................................. 20
3.7.3 Mounting bracket .................................................................................................................. 21
3.7.4 Manifolds............................................................................................................................... 22
3.7.5 Differential pressure transmitter......................................................................................... 23
3.7.6 Pressure connection with impulse line................................................................................ 23
3.7.7 Vibrations .............................................................................................................................. 23
3.7.8 Temperature limits ............................................................................................................... 23
3.8 Instructions for oxygen applications.............................................................................. 23
3.9 Measurement setup for flow measurement.................................................................. 24
3.9.1 In gases and liquids with solids content............................................................................... 24
3.9.2 In vapours and pure liquids .................................................................................................. 25
3.10 Measurement setup for level measurement ............................................................... 26
3.10.1 In open vessels with impulse line.......................................................................................26
3.10.2 In closed vessels with gas-filled impulse lines.................................................................. 27
3.10.3 In closed vessels with liquid / condensate filled impulse lines......................................... 28

CONTENTS
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OPTIBAR DP 3050
4 Electrical connections 29
4.1 Safety instructions.......................................................................................................... 29
4.2 Notes for electrical cables ............................................................................................. 29
4.2.1 Requirements for signal cables supplied by the customer ................................................. 30
4.2.2 Laying electrical cables correctly......................................................................................... 30
4.2.3 Cable preparation ................................................................................................................. 31
4.2.4 Connector pin assignment.................................................................................................... 32
4.2.5 Connection to the power supply ...........................................................................................32
4.2.6 Cable shield and grounding .................................................................................................. 33
4.3 Electrical connection......................................................................................................33
4.3.1 Connection in the terminal compartment ............................................................................ 33
4.4 Grounding the measuring device ................................................................................... 34
4.5 Description of the current output................................................................................... 34
5 Start-up 35
5.1 Comissioning .................................................................................................................. 35
5.2 Factory settings on delivery ........................................................................................... 36
5.3 General operation........................................................................................................... 36
5.3.1 Operation without display and adjustment module ............................................................. 36
5.3.2 Sensor mounting correction (offset) .................................................................................... 37
5.3.3 Zero point and lower range limit (4 mA)............................................................................... 38
5.3.4 Span and upper range limit (20 mA)..................................................................................... 38
5.3.5 Factory reset ......................................................................................................................... 39
5.4 Operation with display and adjustment module ............................................................ 39
5.4.1 Display and operating elements...........................................................................................39
5.4.2 Structure of the operating menu..........................................................................................41
5.4.3 Description of the function ................................................................................................... 42
6 Service 43
6.1 Replacement................................................................................................................... 43
6.1.1 Replace the pressure caps ................................................................................................... 43
6.2 Maintenance ................................................................................................................... 44
6.3 Spare parts availability...................................................................................................44
6.4 Availability of services .................................................................................................... 44
6.5 Repairs............................................................................................................................ 44
6.6 Returning the device to the manufacturer..................................................................... 45
6.6.1 General information.............................................................................................................. 45
6.6.2 Form (for copying) to accompany a returned device............................................................ 46
6.7 Disposal .......................................................................................................................... 46

CONTENTS
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OPTIBAR DP 3050
7 Technical data 47
7.1 Measuring principle........................................................................................................47
7.2 Technical data................................................................................................................. 48
7.3 Pressure ranges............................................................................................................. 53
7.4 Ambient temperature effect on current output............................................................. 54
7.5 Dynamic behaviour of the current output ...................................................................... 55
7.6 Dimensions and weight .................................................................................................. 56
8 Description of HART interface 64
8.1 General description ........................................................................................................64
8.2 Software history ............................................................................................................. 64
8.3 Connection variants........................................................................................................65
8.3.1 Point-to-Point connection - analogue / digital mode........................................................... 65
8.4 Inputs / Outputs and HART®dynamic variables and device variables.......................... 66
9 Notes 67

1 SAFETY INSTRUCTIONS
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1.1 Software history
For all GDC devices, the "Electronic Revision" (ER) is consulted to document the revision status
of the electronics according to NE 53. It is easy to see from the ER whether troubleshooting or
larger changes in the electronic equipment have taken place and how that has affected the
compatibility.
Changes and effect on compatibility
1Downwards compatible changes and fault repair with no effect on operation (e.g. spelling
mistakes on display)
2-_ Downwards compatible hardware and/or software change of interfaces:
HHART
®
PPROFIBUS
FFoundation Fieldbus
MModbus
Xall interfaces
3-_ Downwards compatible hardware and/or software change of inputs and outputs:
ICurrent output
F, P Frequency / pulse output
SStatus output
CControl input
CI Current input
XAll inputs and outputs
4Downwards compatible changes with new functions
5Incompatible changes, i.e. electronic equipment must be changed.
INFORMATION!
In the table below, "x" is a placeholder for possible multi-digit alphanumeric combinations,
depending on the available version.
Release date SW version HW version Changes and
compatibility
Documentation
2019-01-01 1.01.X_ 1.00.X_ -MA OPTIBAR DP 3050 R01

SAFETY INSTRUCTIONS 1
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1.2 Intended use
The OPTIBAR DP 3050 is a differential pressure transmitter suitable for measuring flow, level
and differential pressure. The available measurement ranges and the respective permissible
overloads are indicated on the nameplate. To observe the intended use, adhere to the following
points:
•Observe the instructions in this document.
•Comply with the technical specifications (for further information refer to
Technical data on
page 48).
•Only suitably qualified personnel may install and operate the device.
•Observe the generally accepted standards of good practice.
DANGER!
For devices used in hazardous areas, additional safety notes apply.
CAUTION!
Responsibility for the use of the measuring devices with regard to suitability, intended use and
corrosion resistance of the used materials against the measured fluid lies solely with the
operator.
INFORMATION!
This device is a Group 1, Class A device as specified within CISPR11:2009. It is intended for use in
industrial environment. There may be potential difficulties in ensuring electromagnetic
compatibility in other environments, due to conducted as well as radiated disturbances.
INFORMATION!
The manufacturer is not liable for any damage resulting from improper use or use for other than
the intended purpose.
CAUTION!
• Any modification to the device, including drilling, sawing, trimming, welding and soldering of
parts, or partially painting over or coating, is prohibited.
• Neither is it permitted to use the device as a climbing aid e.g. for installation purposes, as a
holder for cables, pipes or other loads.
• The mounting or installation of parts is only permitted as described in this document, or
insofar as it has been authorised by the manufacturer or a certified service partner.

1 SAFETY INSTRUCTIONS
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1.3 Technical limits
The device was constructed solely for use within the technical limits indicated on the nameplate
and in the technical data. Applications outside of these limits are not permitted and could lead to
significant risk of accident. For this reason, observe the following limits:
•Do not exceed the maximum working pressure (MWP).
•Do not exceed the indicated permissible operating temperature range.
•The permissible ambient temperatures given may not be exceeded or undershot.
•Check the materials used for the wetted parts (e.g. gasket, process connection, separating
diaphragm etc.) for suitability as regards process compatibility.
1.4 Measured products
The device is designed to measure the pressure of vaporous, gaseous and liquid media. Prior to
using any corrosive or abrasive products, the operator must check the resistance of all materials
which are in contact with the product.
1.5 Manufacturer's declaration
The device meets the essential requirements of the EU directives. The CE marking indicates the
conformity of the product with the union legislation applying to the product and providing for CE
marking.
For full information of the EU directives and standards and the approved certifications, please
refer to the EU declaration on the KROHNE website.
CE marking

SAFETY INSTRUCTIONS 1
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1.6 Safety instructions from the manufacturer
1.6.1 Copyright and data protection
The contents of this document have been created with great care. Nevertheless, we provide no
guarantee that the contents are correct, complete or up-to-date.
The contents and works in this document are subject to copyright. Contributions from third
parties are identified as such. Reproduction, processing, dissemination and any type of use
beyond what is permitted under copyright requires written authorisation from the respective
author and/or the manufacturer.
The manufacturer tries always to observe the copyrights of others, and to draw on works created
in-house or works in the public domain.
The collection of personal data (such as names, street addresses or e-mail addresses) in the
manufacturer's documents is always on a voluntary basis whenever possible. Whenever
feasible, it is always possible to make use of the offerings and services without providing any
personal data.
We draw your attention to the fact that data transmission over the Internet (e.g. when
communicating by e-mail) may involve gaps in security. It is not possible to protect such data
completely against access by third parties.
We hereby expressly prohibit the use of the contact data published as part of our duty to publish
an imprint for the purpose of sending us any advertising or informational materials that we have
not expressly requested.
1.6.2 Disclaimer
The manufacturer will not be liable for any damage of any kind by using its product, including,
but not limited to direct, indirect or incidental and consequential damages.
This disclaimer does not apply in case the manufacturer has acted on purpose or with gross
negligence. In the event any applicable law does not allow such limitations on implied warranties
or the exclusion of limitation of certain damages, you may, if such law applies to you, not be
subject to some or all of the above disclaimer, exclusions or limitations.
Any product purchased from the manufacturer is warranted in accordance with the relevant
product documentation and our Terms and Conditions of Sale.
The manufacturer reserves the right to alter the content of its documents, including this
disclaimer in any way, at any time, for any reason, without prior notification, and will not be liable
in any way for possible consequences of such changes.

1 SAFETY INSTRUCTIONS
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1.6.3 Product liability and warranty
The operator shall bear responsibility for the suitability of the device for the specific purpose.
The manufacturer accepts no liability for the consequences of misuse by the operator. Improper
installation or operation of the devices (systems) will cause the warranty to be void. The
respective "Standard Terms and Conditions" which form the basis for the sales contract shall
also apply.
1.6.4 Information concerning the documentation
To prevent any injury to the user or damage to the device it is essential that you read the
information in this document and observe applicable national standards, safety requirements
and accident prevention regulations.
If this document is not in your native language and if you have any problems understanding the
text, we advise you to contact your local office for assistance. The manufacturer can not accept
responsibility for any damage or injury caused by misunderstanding of the information in this
document.
This document is provided to help you establish operating conditions, which will permit safe and
efficient use of this device. Special considerations and precautions are also described in the
document, which appear in the form of icons as shown below.

SAFETY INSTRUCTIONS 1
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1.6.5 Warnings and symbols used
Safety warnings are indicated by the following symbols.
• HANDLING
HANDLINGHANDLING
HANDLING
This symbol designates all instructions for actions to be carried out by the operator in the
specified sequence.
iRESULT
RESULTRESULT
RESULT
This symbol refers to all important consequences of the previous actions.
1.7 Safety instructions for the operator
DANGER!
This warning refers to the immediate danger when working with electricity.
DANGER!
This warning refers to the immediate danger of burns caused by heat or hot surfaces.
DANGER!
This warning refers to the immediate danger when using this device in a hazardous atmosphere.
DANGER!
These warnings must be observed without fail. Even partial disregard of this warning can lead to
serious health problems and even death. There is also the risk of seriously damaging the device
or parts of the operator's plant.
WARNING!
Disregarding this safety warning, even if only in part, poses the risk of serious health problems.
There is also the risk of damaging the device or parts of the operator's plant.
CAUTION!
Disregarding these instructions can result in damage to the device or to parts of the operator's
plant.
INFORMATION!
These instructions contain important information for the handling of the device.
LEGAL NOTICE!
This note contains information on statutory directives and standards.
WARNING!
In general, devices from the manufacturer may only be installed, commissioned, operated and
maintained by properly trained and authorized personnel.
This document is provided to help you establish operating conditions, which will permit safe and
efficient use of this device.

2 DEVICE DESCRIPTION
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2.1 Scope of delivery
Optional accessories
•Oval flange adapter 1/2-14 NPT (female)
•Manifolds
•Sealings
•Mounting bracket
INFORMATION!
Inspect the packaging carefully for damages or signs of rough handling. Report damage to the
carrier and to the local office of the manufacturer.
INFORMATION!
Do a check of the packing list to make sure that you have all the elements given in the order.
INFORMATION!
Look at the device nameplate to ensure that the device is delivered according to your order.
Check for the correct supply voltage printed on the nameplate.
Figure 2-1: Scope of delivery
1 Device in the version as ordered
2 Documentation (test reports, factory and material certification (if ordered) and product documentation)
INFORMATION!
Assembly materials and tools are not part of the delivery. Use the assembly materials and tools
in compliance with the applicable occupational health and safety directives.

DEVICE DESCRIPTION 2
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2.2 Device design
The following drawings show the basic components of the differential pressure transmitter.
Figure 2-2: Basic components of single chamber pressure transmitter
1 Housing cover, optional with display and adjustment module below
2 Housing with electronics and cable entry (aligned parallel to process axis)
3 Process assembly with measuring cell

2 DEVICE DESCRIPTION
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2.2.1 Connection variants
Following connection variants are available:
•Process connection: 1/4-18 NPT (female) as well as IEC 61518 A
•Optional: Oval flange adapter 1/2-14 NPT (female)
•Mounting thread: 7/16 UNF, optional M10
The optional venting and drain valves on the device must be chosen according to the installation
situation.
Figure 2-3: Process assembly
1 Rear vent on process axis
2 Side vent

DEVICE DESCRIPTION 2
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2.3 Nameplates
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
INFORMATION!
Look at the device nameplate to ensure that the device is delivered according to your order.
Check for the correct supply voltage printed on the nameplate.
Figure 2-4: Example for a nameplate
1 Observe the installation and operating instructions
2 CE marking and marking of notified body
3 Hardware and Software version
4 Product name and type code
5 Nominal range
Permissible process pressure
Nominal range of absolute pressure measurement
6 Permissible temperature range
7 Electronics power supply and signal output
8 Ingress protection and material of wetted parts
(Diaphragm, process connections, sealing and fill fluid)
9 Approvals and approval guidelines
2019
VGKN4AXS0SF40EHSAAEE000XM0XM0

2 DEVICE DESCRIPTION
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2.4 Terms and abbreviations
The following terms and abbreviations are used in this document.
URL
URLURL
URL
Upper Range Limit Upper measuring range limit. Also called nominal range. The highest value that can be measured by a particular device.
LRL
LRLLRL
LRL
Lower Range Limit Lower measuring range limit. The lowest value that can be measured by a particular device.
URV
URVURV
URV
Upper Range Value The calibrated measuring range or the highest adjusted measured value. This value corresponds to the 20 mA signal.
LRV
LRVLRV
LRV
Lower Range Value The calibrated measuring range or the lowest adjusted measured value. This value corresponds to the 4 mA signal.
SPAN
SPANSPAN
SPAN
Span Measuring span or measuring range. SPAN = URL –LRL
CAL SPAN
CAL SPANCAL SPAN
CAL SPAN
Calibrated Span Calibrated or adjusted measuring span. CAL SPAN = URV –LRV. Also called "cSPAN".
This is the span set to the 4…20 mA output.
TD
TDTD
TD
Turn Down The ratio from the measuring span to the adjusted measuring span. TD= SPAN/(CAL SPAN) = (+URL)/(CAL SPAN)
The following applies: URV ≤URL, CAL SPAN ≤SPAN, TD ≥1
Example for TD
TDTD
TD Turn Down
LRL
LRLLRL
LRL= 0 bar
URL
URLURL
URL= 3 bar / 43.5 psi SPAN
SPANSPAN
SPAN= 3 bar / 43.5 psi
URV
URVURV
URV= 2 bar / 29 psi
LRV
LRVLRV
LRV= 0.5 bar / 7.25 psi CAL SPAN
CAL SPANCAL SPAN
CAL SPAN= 1.5 bar / 21.75 psi
TD
TDTD
TD= 2:1

INSTALLATION 3
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3.1 General notes on installation
3.2 Ingress protection for housing
The housing of the signal converter fulfills the requirements for ingress protection in
accordance with IEC 60529. For further information refer to
Technical data on page 48.
3.3 Packaging
Your device was protected by packaging during transport. Its capacity to handle normal loads
during transport is assured by a test following ISO 22248. The packaging of standard devices
consists of environmentally friendly, recyclable cardboard and PE foil. For special versions, PE
foam or PE foil is also used. Dispose of the packaging material via specialised recycling
companies.
INFORMATION!
Inspect the packaging carefully for damages or signs of rough handling. Report damage to the
carrier and to the local office of the manufacturer.
INFORMATION!
Do a check of the packing list to make sure that you have all the elements given in the order.
INFORMATION!
Look at the device nameplate to ensure that the device is delivered according to your order.
Check for the correct supply voltage printed on the nameplate.
CAUTION!
The first digit stands for the protection of the inner electronic components against the ingress of
foreign bodies including dust. The first digit "6" means that the housing is dust-proof. The
second digit designates the protection of the inner electronic components against the ingress of
water. The second digit "6" means that the housing is waterproof and also resistant against a
strong jet of water. The number "7" means that the housing is waterproof even submersed under
water for a given pressure and time. The number "8" means that the housing is permanently
waterproof even under water.
CAUTION!
Devices for oxygen applications are sealed in PE foil and a "DEGREASED" label (oil and grease-
free) is affixed. Remove this foil just before mounting the device. Once the protection for the
process connection has been removed, the label O
2
will be visible on the process connection. No
oil, grease or dirt should penetrate. Danger of explosion.

3 INSTALLATION
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3.4 Storage
•Store the device in a dry, dust-free location.
•Avoid extended direct exposure to the sun.
•Store the device in the original packaging supplied.
•Do not expose to aggressive media.
•Avoid mechanical shocks.
•Storage temperature: -40...+80°C / -40...+176°F
•Relative air humidity: 20...85%.
3.5 Transport
•Use original packaging for transport and ensure that the packaging does not get crushed or
damaged by sharp objects or other boxes.
•Do not throw or drop the device.
•Avoid temperatures below -40°C / -40°F and above +80°C / +176°F.
•When transporting by ship, use seaworthy outer packing.
3.6 Installation specifications
The accuracy of the measurement is only guaranteed if the transmitter and accompanying
impulse line(s), if any, have been correctly installed. In addition, extreme ambient conditions
including large fluctuations in temperature, vibrations and shocks should be kept as far away as
possible from the measuring equipment.
CAUTION!
Observe the storage information found on the packaging. Labels on the original packaging must
always remain legible and may not be damaged.
INFORMATION!
Observe the relevant directives, ordinances, standards and accident prevention regulations (e.g.
VDE/VDI 3512, DIN 19210, VBG, Elex V, etc.).

INSTALLATION 3
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3.7 Mounting
3.7.1 Opening the device, installing and dismantling the graphic display
Electrically, the graphic display is connected to the device using a plug connector on the
connection board with the aid of a flying lead. The display is mechanically fixed by way of a
spacer plugged into the connection board. For optimal readability, the display can be rotated on
this bracket by 350°, adjusting to any of the pressure transmitter's possible installation
positions.
CAUTION!
• Prior to installing the transmitter, it is essential to verify whether the version of the device on
hand completely fulfils the technical and safety requirements of the measuring point. This
applies in particular to the measuring range, overpressure resistance, temperature,
explosion protection and operating voltage.
• Check the materials used for the wetted parts (e.g. gasket, process connection, separating
diaphragm etc.) for suitability as regards process compatibility.
• The device must not be heated by radiated heat (e.g. exposure to the sun) to an electronics
housing surface temperature above the maximum permissible ambient temperature. If it is
necessary to prevent damage from heat sources, a heat protection (e.g. sun shade) has to be
installed.
DANGER!
Check whether the ambient air around the signal converter is explosive. Opening the signal
converter in an explosive atmosphere may result in ignition and explosion.
DANGER!
The product may cause the signal converter to become extremely hot. Possible risk of burning.
For this reason, promptly shut off the process or isolate the signal converter sufficiently from
the product prior to starting work and check that the converter has cooled down to room
temperature.
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.

3 INSTALLATION
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Procedure
• Ensure that the signal converter has been de-energised!
• Remove the housing cover from the signal converter by hand.
If the housing cover is stuck and cannot be moved by hand, use a suitable square material to
carefully remove it. Place this tool in the flaring located in the housing cover. Take care not to
damage the optionally available window cover! Use a lever action to now carefully apply
greater torque to loosen it. As soon as the housing cover opens, put the tool away and turn the
cover by hand until it opens.
• Ensure that no moisture gets into the device while it is open (drops, spray, liquid mist, etc. …).
• If there is a display, it can be removed by pulling it forward gently. Pay attention to the
connecting cable between the device and the display. To completely remove the display, the
connecting cable must be carefully pulled out of the connector on the board.
iThe connection board is now available for further work.
• To install the display and close the housing, follow the steps in reverse order.
Note that the housing covers for devices with displays and devices without displays are
different heights. Never attempt, even on a temporary basis, to install a housing cover for a
blind device on a device with an installed display.
3.7.2 Process connections
Before installation of the device, please check the correct position of the high (H) and low (L)
pressure side. You can see the designations (H / L) underneath the measuring cell acc. to the
following figure.
The process connections of the differential pressure transmitter are usually 1/4-18 NPT (female)
at a distance of 54 mm / 2.13". Through optional oval flange adapters, the connections 1/2-14
NPT (female) are also selectable.
INFORMATION!
Each time a housing cover is opened, the thread should be cleaned and greased. Use only resin-
free and acid-free grease.
Ensure that the housing gasket is properly fitted, clean and undamaged.
Figure 3-1: Process connection of the differential pressure transmitter
1 High-pressure side
2 Low-pressure side