KROHNE H250 M40 Series User manual

Variable area flowmeter
Electronic revision ESK: up to ER 3.1.x
H250 M40
H250 M40H250 M40
H250 M40 Handbook
HandbookHandbook
Handbook
© KROHNE 03/2020 - 4000640706 - MA H250-M40 R06 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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H250 M40
1 Safety instructions 6
1.1 Software history ............................................................................................................... 6
1.2 Intended use ..................................................................................................................... 7
1.3 Certifications .................................................................................................................... 8
1.4 Pressure equipment directive.......................................................................................... 8
1.5 Safety instructions from the manufacturer ................................................................... 10
1.5.1 Copyright and data protection .............................................................................................. 10
1.5.2 Disclaimer ............................................................................................................................. 10
1.5.3 Product liability and warranty .............................................................................................. 11
1.5.4 Information concerning the documentation......................................................................... 11
1.5.5 Warnings and symbols used................................................................................................. 12
1.6 Safety instructions for the operator............................................................................... 12
2 Device description 13
2.1 Scope of delivery............................................................................................................. 13
2.2 Device version................................................................................................................. 14
2.2.1 Indicator versions ................................................................................................................. 15
2.2.2 Float damping ....................................................................................................................... 17
2.2.3 Pointer damping.................................................................................................................... 17
2.3 Nameplate ...................................................................................................................... 18
2.4 Description code............................................................................................................. 19
3 Installation 20
3.1 General installation notes .............................................................................................. 20
3.2 Storage ........................................................................................................................... 20
3.3 Transport ........................................................................................................................ 20
3.4 Installation conditions ....................................................................................................21
3.4.1 Tightening torques................................................................................................................ 23
3.4.2 Magnetic filters ..................................................................................................................... 23
3.4.3 Heat insulation ...................................................................................................................... 24
4 Electrical connections 25
4.1 Safety instructions.......................................................................................................... 25
4.2 Electrical connection for indicator M40......................................................................... 26
4.2.1 Connection of the limit switches K1/K2................................................................................ 26
4.2.2 Current output ESK4A........................................................................................................... 29
4.2.3 ESK4-T limit outputs............................................................................................................. 32
4.2.4 ESK4-T pulse output ............................................................................................................. 34
4.2.5 ESK4-T binary input .............................................................................................................. 35
4.2.6 ESK4-FF / ESK4-PA fieldbus communication...................................................................... 36
4.2.7 Harting HAN 7D connection.................................................................................................. 37
4.3 Grounding connections................................................................................................... 38
4.4 Ingress protection .......................................................................................................... 38

CONTENTS
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5 Start-up 39
5.1 Standard device .............................................................................................................. 39
5.2 Indicator ESK4-T ............................................................................................................ 39
6 Operation 40
6.1 ESK4A - Loop Check Mode............................................................................................. 40
6.2 Operating elements ESK4-T........................................................................................... 41
6.3 Basic principles of operation ESK4-T ............................................................................ 42
6.3.1 Description of the operating keys......................................................................................... 42
6.3.2 Navigation within the menu structure.................................................................................. 42
6.3.3 Change the settings in the menu..........................................................................................43
6.4 Overview of the units ESK4-T......................................................................................... 44
6.5 Error messages ESK4-T................................................................................................. 45
6.6 ESK4-T menu.................................................................................................................. 48
6.6.1 Factory settings .................................................................................................................... 48
6.6.2 Menu structure ..................................................................................................................... 50
6.6.3 Menu description .................................................................................................................. 53
7 Service 62
7.1 Maintenance ................................................................................................................... 62
7.2 Replacement and retrofitting......................................................................................... 62
7.2.1 Replacing floats .................................................................................................................... 62
7.2.2 Retrofitting of the float damping .......................................................................................... 63
7.2.3 Retrofitting of the limit switch .............................................................................................. 64
7.2.4 Replacement - Retrofitting ESK4A ....................................................................................... 65
7.2.5 Replacement - Retrofitting add-on module ESK4-T / PA / FF............................................. 66
7.3 Spare parts availability...................................................................................................66
7.3.1 List of spare parts................................................................................................................. 66
7.4 Availability of services .................................................................................................... 69
7.5 Returning the device to the manufacturer..................................................................... 70
7.5.1 General information.............................................................................................................. 70
7.5.2 Form (for copying) to accompany a returned device............................................................ 71
7.6 Disposal .......................................................................................................................... 71
7.7 Disassembly and recycling............................................................................................. 72
7.7.1 Description of the device components ................................................................................. 72
7.7.2 Indicator versions ................................................................................................................. 73

CONTENTS
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8 Technical data 76
8.1 Functional principle........................................................................................................ 76
8.2 Technical data................................................................................................................. 77
8.2.1 Temperatures for mechanical indicators without auxiliary power...................................... 79
8.2.2 Temperatures for devices with electrical components ....................................................... 80
8.2.3 Pressure tightness (vacuum) H250/C................................................................................... 81
8.2.4 Process connections............................................................................................................. 82
8.2.5 Electrical connections, inputs and outputs .......................................................................... 83
8.2.6 Ex approvals.......................................................................................................................... 86
8.3 Dimensions and weight .................................................................................................. 87
8.4 Measuring ranges...........................................................................................................88
8.4.1 H250/HC - Hastelloy
®
, H250/RR - stainless steel ............................................................... 89
8.4.2 H250/C - Ceramic/PTFE ....................................................................................................... 91
8.4.3 H250/RR (Low flow)............................................................................................................... 93
8.4.4 H250H - Horizontal installation position .............................................................................. 94
8.4.5 H250U - Vertical installation position...................................................................................96
9 Notes 97

1 SAFETY INSTRUCTIONS
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1.1 Software history
The electronic revision (sticker on the base module ESK4 / ESK4A) indicates the respective
hardware/software status of the electronics.
All add-on modules (ESK4-T, ESK4-FF and ESK4-PA) have an additional sticker indicating their
respective firmware version.
Electronic revision Explanations
ER 1.1.x Basic version (cannot be combined with other indicator versions):
ESK4 / current output 4…20 mA with HART
®
communication
ESK4 HART DD 01.01.
ESK4 HART DTM 01.03.
ER 2.0.x Functional add-on to ER 1.1.x:
can be combined with indicator version ESK4 FF / Foundation Fieldbus
(Firmware version FF module from 1.0.2)
ER 2.1.x Functional add-on to ER 2.0.x:
can be combined with indicator version ESK4-PA / Profibus PA
(Firmware version PA module from 1.0.0)
can be combined with indicator version ESK4-IO / LCD, binary inputs/outputs
(Firmware version IO module from 1.1.0)
ER 2.2.x Functional add-on to ER 2.1.x:
Support of failure signal (low) according to NE 43
for the ESK4 current output module
ER 3.0.x Functional add-on:
Update for HART
®
communication from 5.9 to 7.4 including new DD/DTM
ESK4A HART DD 01.01
ESK4A HART DTM 01.04
(Extension of module designation from ESK4 to ESK4A for HART
®
7)
can be combined with ESK4-FF (Firmware version FF module from 1.0.2)
ESK4-PA (... PA module from 1.0.0)
ESK4-IO (... IO module from 1.2.0)
ER 3.1.x Functional add-on:
Support of application diagnostics for ESK4A/HART (e.g. blocked float or pulsating float)
can be combined with ESK4-IO (Firmware version IO-module from 1.3.0)
Table 1-1: Electronic revision

SAFETY INSTRUCTIONS 1
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1.2 Intended use
The variable area flowmeters are suitable for measuring clean gases, vapours and liquids.
Intended use
•The product may not contain any ferromagnetic particles or solids. It may be necessary to
install magnetic filters or mechanical filters.
•The product must be sufficiently liquid and free of deposits.
•Avoid pressure surges and pulsing flows.
•Open valves slowly. Do not use solenoid valves.
Use suitable measures to eliminate compression vibrations during gas measurements
•Short pipeline lengths to next restriction
•Nominal pipe size not greater than nominal device size
•Use of floats with damping
•Increase in operating pressure (while taking into account the resulting change in density and
thus change in scale)
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.
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
CAUTION!
Do not use any abrasive media containing solid particles or highly viscous media.

1 SAFETY INSTRUCTIONS
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1.3 Certifications
The device fulfils all applicable statutory requirements of the EU directives:
•Pressure equipment directive
•For devices with electrical installations: EMC directive
•Devices for use in hazardous areas: ATEX directive
as well as
•NAMUR recommendations NE 21, NE 43 and NE 107
The manufacturer certifies successful testing of the product by applying the CE marking.
An EU declaration of conformity regarding the directives in question and the associated
harmonised standards can be downloaded from our internet site.
1.4 Pressure equipment directive
A conformity assessment in accordance with pressure equipment directive has been carried out
for the devices described. Conformity is certified by applying the CE mark. The number of the
notified body is also stated.
The PED key describes the rating of the devices:
The PED key identification can be found on the nameplate of the device (for details refer to
Nameplate on page 18).
CE marking
Example: PED/G1/III/H
GGases and vapours
1Fluid group 1
III Category III
HConformity assessment method according to Module H
Table 1-2: Example of PED key
INFORMATION!
The stated pressures (PS) and temperatures (TS) only apply as refers to the pressure resistance
of the sensor body. As regards the functionality of the entire device, further restrictions of the
maximum temperature may need to be observed (e.g. ATEX approval). Devices rated below
category I due to their size, do not receive the CE mark in the scope of the PED. These devices
are subject to applicable sound engineering practice (SEP).

SAFETY INSTRUCTIONS 1
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Residual risk
A risk analysis in accordance with the pressure equipment directive has been carried out for the
devices . The residual risk is described as follows:
•The devices are designed according to the valid and applicable rules and standards for static
operation and their pressure resistance is calculated for the declared maximum pressure
and temperature (no calculation for cyclical change).
•Responsibility for the use of the measuring devices with regard to corrosion resistance of the
used materials against the measured fluid lies solely with the operator.
•Avoid abrasion.
•Avoid pulsation and cavitation.
•Protect devices from vibration and high-frequency oscillation.
•Draining (backflow) may be delayed due to the float in the measuring tube.
•Implement appropriate measures to counteract external fire hazards

1 SAFETY INSTRUCTIONS
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1.5 Safety instructions from the manufacturer
1.5.1 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.
1.5.2 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.

SAFETY INSTRUCTIONS 1
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1.5.3 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.
1.5.4 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.

1 SAFETY INSTRUCTIONS
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1.5.5 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.
1.6 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.

DEVICE DESCRIPTION 2
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2.1 Scope of delivery
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 Measuring device in ordered version
2 For the ESK4-T version - bar magnet
3 Documentation
4 Certificates, calibration report (supplied to order only)
5 Wrench (for electrical devices only)

2 DEVICE DESCRIPTION
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2.2 Device version
•H250 with indicator M40
•H250 with M40 indicator with display cut-out for ESK4-T
Description of the device version
1. H250/RR/M40
•Local indicator without auxiliary power
•Max. 2 limit switches, type NAMUR, NAMUR safety-oriented or transistor (3-wire)
•Electrical signal output 4...20 mA, HART
®
or Fieldbus communication
•Intrinsically safe (Ex i) or in explosion-proof enclosure (Ex d)
2. H250/RR/M40
•Additional LCD, measured value and/or flow counter
•2 configurable binary outputs, limit value or pulse output
•1 binary input, Start / Stop / Reset flow counter
•2-wire current output 4…20 mA, HART
®
communication
•Intrinsically safe (Ex i) or in explosion-proof enclosure (Ex d)
Optional versions:
•H250 with indicator M40 as high temperature version HT
•H250H for use in horizontal pipelines
•H250U for use in vertical fall pipes
•H250F with hygienic measuring tube design for Food & Pharma
•H250C with PTFE / TFM liner for aggressive media
Indicator options
•M40 - Aluminium, two-layer powder coating (epoxy / polyester)
•M40R - Stainless steel without coating
Offshore wet coating for aluminium or stainless steel on request
Figure 2-2: Device version - H250 with M40 indicator

DEVICE DESCRIPTION 2
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2.2.1 Indicator versions
The M40 indicator can be fitted with various modules.
Both versions can be combined with one another.
Figure 2-3: Basic version
1 Pointer module
2 Bolts for ESK4A attachment
3 Base plate
4 Module profile
5 Pressure piece for ESK4A attachment
6 Housing cover locking device
7 Ground terminal external
Figure 2-4: Versions K1 / K2 and ESK4A
1 Indicator with K2 contact module
2 Indicator with ESK4A current output 4...20 mA

2 DEVICE DESCRIPTION
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For more details refer to the supplementary instructions "H250 M40 Foundation Fieldbus" or
"H250 M40 Profibus PA".
Figure 2-5: Version ESK4-T
1 ESK4A connection
2 Module cover
3 Display
4 Display module ESK4-IO
5 Operating keys ^↑
6 Connection binary outputs and reset input
7 Module connection cable
Figure 2-6: Version Fieldbus ESK4-FF / ESK4-PA
1 Basic module with electronic magnet sensors ESK4A
2 Connection bus module
3 DIP switch for bus settings

DEVICE DESCRIPTION 2
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2.2.2 Float damping
Float damping is characterised by high standstill times and self-centering. The damping sleeve
is made of high performance ceramic or PEEK, depending on the medium and the application.
Float damping can also be retrofitted for the user (refer to "Service").
Use of damping
•Generally when CIV and DIV floats are used for gas measurement.
•For TIV floats (H250/RR and H250/HC only) with an operating primary pressure:
2.2.3 Pointer damping
In principle, the indicating element with its magnetic system contains indicator damping.
An additional eddy current brake is advantageous in the event of fluctuating or pulsing flows.
The magnets on the eddy current brake surround the pointer vane without touching it, damping
its movement. The result is a much steadier pointer position, without distorting the measured
value. The eddy current brake can be retrofitted during operation without recalibration.
Note the maximum tightening torque (0.12 Nm) for the turnbuckle!
Nominal size according to Operating primary pressure
EN 1092-1 ASME B16.5 [bar] [psig]
DN50 1/2" ≤0.3 ≤4.4
DN25 1" ≤0.3 ≤4.4
DN50 2" ≤0.2 ≤2.9
DN80 3" ≤0.2 ≤2.9
DN100 4" ≤0.2 ≤2.9
Table 2-1: Float damping
Figure 2-7: Pointer damping
1 Eddy current brake
2 Pointer vane
3 Support
4 Pointer cylinder
5 Turnbuckle, max. tightening torque is 0.12 Nm

2 DEVICE DESCRIPTION
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2.3 Nameplate
Additional markings on the indicator
•SN - serial number
•SO - sales order / item
•PA - production order
•Vx - product configurator code
•AC - article code
INFORMATION!
Check on the device nameplates, that the device is supplied according to your order.
Figure 2-8: Example of a nameplate
1 Device type
2 Manufacturer
3 Identification number of the notified body
4 Rating data: temperature & pressure rating
5 Data according to the pressure equipment directive
6 Marking according to the notified body
7 Electrical connection data
8 Note to observe the documentation and for disposal
9 Data matrix

DEVICE DESCRIPTION 2
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2.4 Description code
The description code consists of the following elements *:
* positions which are not needed are omitted (no blank positions)
Figure 2-9: Description code
1 Device type
Device typeDevice type
Device type
H250 - standard version
H250H - horizontal flow direction
H250U - flow direction from top to bottom
2 Materials / versions
Materials / versionsMaterials / versions
Materials / versions
RR - stainless steel
C - PTFE or PTFE/ceramics
HC - Hastelloy
®
Ti - Titanium
Mo - Monel
In - Inconel
F - aseptic version (food)
3 Heating jacket version
Heating jacket versionHeating jacket version
Heating jacket version
B - with heating jacket
4 Type series of indicators
Type series of indicatorsType series of indicators
Type series of indicators
M40 - indicator M40
M40R - indicator in stainless steel housing
5 High-temperature version
High-temperature versionHigh-temperature version
High-temperature version
HT - version with HT extension
6 Electrical signal output
Electrical signal outputElectrical signal output
Electrical signal output
ESK - electrical signal output 4...20 mA (ESK4A)
- optionally available with counter, I/O module and display (ESK4-T)
- Foundation Fieldbus (ESK4-FF)
- Profibus PA (ESK4-PA)
7 Limit switches
Limit switchesLimit switches
Limit switches
K1 - one limit switch
K2 - two limit switches
8 Explosion protection
Explosion protectionExplosion protection
Explosion protection
Ex - explosion-protected equipment
9 SIL version
SIL versionSIL version
SIL version
SE - SIL compliant electronic signal output
SK - SIL compliant limit switch

3 INSTALLATION
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3.1 General installation notes
3.2 Storage
•Store the device in a dry, dust-free location.
•Avoid direct exposure to the sun.
•Store the measuring device in the original packaging.
•The permissible storage temperatures for standard devices are: -40...+80°C / -40...+176°F
3.3 Transport
If possible, transport the device to the installation point in the original packaging.
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.