All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without
the prior written authorisation of KROHNE Messtechnik GmbH.
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H250 M40
1.1 Intended use
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!
The manufacturer is not liable for any damage resulting from improper use or use for other than
the intended purpose.
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.
SAFETY INSTRUCTIONS 1
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)
Observe installation conditions according to VDI/VDE 3513-3
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
WARNING!
Responsibility for the use of the measurement devices with regard to suitability, intended use
and corrosion resistance of the used materials against the measured fluid lies solely with the
operator.
The manufacturer is not liable for any damage resulting from improper use or use for other than
the intended purpose.
Do not use any abrasive media containing solid particles or highly viscous media.
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1 SAFETY INSTRUCTIONS
1.2 Certifications
CE marking
The device fulfils all applicable statutory requirements of the following EC directives:
• Pressure equipment directive 97/23/EC
• For devices with electrical installations: EMC Directive 2004/108/EC
• Devices for use in hazardous areas: ATEX Directive 94/9/EC
as well as
• NAMUR recommendations NE 21 and NE 43
The manufacturer certifies successful testing of the product by applying the CE mark.
H250 M40
1.3 Pressure equipment directive
A conformity assessment in accordance with pressure equipment directive 97/23/EC 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 rating of devices:
PED/G1/III/H
GGases and steams
1Fluid group 1
IIICategory III
HConformity assessment method according to Module H
The PED key identification can be found on the nameplate of the device (see section 2.3
Nameplate)
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 (Article 3/3) 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.
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H250 M40
1.4 Safety instructions from the manufacturer
1.5 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.
SAFETY INSTRUCTIONS 1
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.
1.5.1 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.
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1 SAFETY INSTRUCTIONS
1.5.2 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 and 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.
1.5.3 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 underneath icons.
H250 M40
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H250 M40
1.5.4 Warnings and symbols used
Safety warnings are indicated by the following symbols.
DANGER!
This information 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.
SAFETY INSTRUCTIONS 1
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.
• HANDLING
HANDLING
HANDLINGHANDLING
This symbol designates all instructions for actions to be carried out by the operator in the
specified sequence.
iRESULT
RESULT
RESULTRESULT
This symbol refers to all important consequences of the previous actions.
1.6 Safety instructions for the operator
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.
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2 DEVICE DESCRIPTION
2.1 Scope of delivery
INFORMATION!
Inspect the cartons 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.
H250 M40
Figure 2-1: Scope of delivery
1 Measuring device in ordered version
2 For the ESK4T version - bar magnet
3 Documentation
4 Certificates, calibration report (supplied to order only)
5 Key
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H250 M40
2.2 Device version
• H250 with indicator M40
• H250 with M40 indicator with display cut-out for ESK4-T
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
• Optionally intrinsically safe (Ex i) or in explosion-proof enclosure (Ex d)
DEVICE DESCRIPTION 2
®
or Fieldbus communication
2. H250/RR/M40
• additional LCD, measured value and/or flow counter
• 2 configurable binary outputs, limit value or 10Hz pulse output
1 Basic module with electronic magnet sensors
2 Connection bus module
3 hardware settings
For more details see the supplementary instructions "H250 M40 Foundation Fieldbus"
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2 DEVICE DESCRIPTION
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 (see 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:
Nominal size acc. toOperating primary pressure
EN 1092-1ASME B16.5[bar][psig]
DN 50½"≤0.3≤4.4
DN251"≤0.3≤4.4
DN502"≤0.2≤2.9
DN803"≤0.2≤2.9
DN 1004"≤0.2≤2.9
H250 M40
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. A turnbuckle ensures a proper fit. The eddy current brake can be retrofitted during
operation without recalibrating (see Service).
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H250 M40
2.3 Nameplate
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.
DEVICE DESCRIPTION 2
Figure 2-2: Nameplate on the indicator
1 Device type
2 Manufacturer
3 Notified ATEX & PED body
4 Sizing data: temperature & pressure rating
5 PED data
6 Ex data
7 Electrical connection data
8 Internet site
Additional markings on the indicator
• SN - serial number
• SO - sales order / item
• PA - Production order
• Vx - product configurator code
• AC - article code
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2 DEVICE DESCRIPTION
2.4 Description code
The description code* consists of the following elements:
1 Device type
H250 - standard version
H250H - horizontal flow direction
H250U - flow direction from top to bottom
2 Materials / versions
RR - Stainless Steel
C - PTFE or PTFE/ceramics
HC - Hastelloy
Ti - Titanium
F - aseptic version (food)
3 Heating jacket version
B - with heating jacket
H250 M40
4 Series of indicators
M40 - Indicator M40
M40S - Indicator with added corrosion protection
M40R - Indicator in Stainless Steel housing
5 High temperature version
HT - Version with HT extension
6 Electrical signal output
ESK - Electrical signal output 4...20mA (ESK4)
- optionally available with counter, I/O module and display (ESK4-T) or
- Foundation Fieldbus (ESK4-FF) or
- Profibus PA (ESK4-PA)
7 Limit switches
K1 - One limit switch
K2 - Two limit switches
8 Explosion protection
EX - Explosion-protected equipment
9 SIL Version
SE - SIL compliant electronic signal output
SK - SIL compliant limit switch
* positions which are not needed are omitted (no blank positions)
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H250 M40
2.5 Electronics revision
The Electronic Revision (sticker on the base module ESK4) indicates the respective
hardware/software status of the electronics. All add-on modules (ESK4-T, ESK4-FF and ESK4PA) have an additional sticker indicating their respective firmware version.
DEVICE DESCRIPTION 2
Electronics
Explanations
revision
ER 1.1.xBasic version (cannot be combined with other indicator versions):
can be combined with indicator version ESK4 FF / Foundation Fieldbus;
(Firmware Version FF module from 1.0.2)
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-T / LCD, binary inputs/outputs;
(Firmware Version T module from 1.1.0)
Functional add-on to ER 2.1.x (in preparation):
Support of failure signal (low) according to NE43
for the ESK 4 current output module
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3 INSTALLATION
3.1 Notes on installation
INFORMATION!
Inspect the cartons 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.
3.2 Storage
• Store the device in a dry and dust-free location.
• Avoid lasting direct exposure to the sun.
• Store the device in its original packing.
• The permissible storage temperature for standard devices is -40...+80°C / -40...+176°F.
H250 M40
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H250 M40
3.3 Installation conditions
CAUTION!
When installing the device in the piping, the following points must be observed:
•
The variable area flowmeter must be installed vertically (measuring principle). Flow direction
from bottom to top. For installation recommendations please refer also to VDI/VDE 3513
Sheet 3.
H250Hs are installed horizontally and H250U devices are installed vertically with the flow
direction from top to bottom.
•
A straight unimpeded inlet run of ≥ 5x DN upstream of the device and a straight outlet run of
≥ 3x DN downstream of the device are recommended.
•
Screws, bolts and gaskets are to be provided by the customer and must be selected in
accordance with the pressure rating of the connection or the operating pressure.
•
The inside diameter of the flange deviates from the standard dimensions. Flange seal
standard DIN 2690 can be applied without any limitation.
•
Align the gaskets. Tighten the nuts with the tightening torques of the appropriate pressure
rating.
For devices with PTFE liner or ceramic liner and PTFE raised faces, see chapter "Tightening
torques".
•
Control devices are to be positioned downstream of the measuring device.
•
Shutoff devices are preferably to be positioned upstream of the measuring device.
•
Before connecting, blow or flush out the pipes leading to the device.
•
Pipes for gas flow need to be dried before the device is installed.
•
Use connectors suitable for the particular device version.
•
Align the pipes centrically with the connection bores on the measuring device so they are free
of stresses.
•
If necessary, the piping has to be supported to reduce the vibrations transmitted to the
measuring device.
•
Do not lay signal cables directly next to cables for the power supply.
INSTALLATION 3
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3 INSTALLATION
Minimum distance between the divices
If several instruments are installed side by side, a minimum distance a < 300mm between these
divices is required.
H250 M40
Take special note of the installation position for the H250H with horizontal flow
direction:
In order to comply with thermal parameters and measuring accuracy, H250H flowmeters for
horizontal installation are to be installed in the pipeline so that the display is located on the side
of the measuring tube. The maximum medium and ambient temperatures indicated as well as
the measuring accuracy are based on lateral installation of the display.
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H250 M40
3.3.1 Tightening torques
For measuring devices with PTFE liner or ceramic liner and PTFE raised face, tighten the flange
threads with the following torques:
The use of magnetic filters is recommended when the medium contains particles which can be
influenced magnetically. The magnetic filter is to be installed in the flow direction upstream of
the flowmeter. Bar magnets are positioned helically in the filter to provide optimal efficiency at
low pressure loss. All of the magnets are coated individually with PTFE to protect against
corrosion. Material: 1.4571
Magnetic filters
1 Type F - fitting part with flange - overall length 100 mm
2 Type FS - fitting part without flange - overall length 50 mm
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3 INSTALLATION
3.3.3 Heat insulation
CAUTION!
The indicator housing may not be heat-insulated.
The heat insulation 3 may only reach as far as the housing fastening 4.
1 Standard indicator M40
2 Indicator with HT extension
H250 M40
CAUTION!
The heat insulation 1 may only reach to the rear of the housing 2. The area of the cable entries
3 must be freely accessible.
Figure 3-1: Insulation - cross section
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H250 M40
4.1 Security information
DANGER!
All work on the electrical connections may only be carried out with the power disconnected. Take
note of the voltage data on the nameplate!
DANGER!
Observe the national regulations for electrical installations!
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
WARNING!
Observe without fail the local occupational health and safety regulations. Any work done on the
electrical components of the measuring device may only be carried out by properly trained
specialists.
ELECTRICAL CONNECTIONS 4
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.
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4 ELECTRICAL CONNECTIONS
4.2 Electrical connection indicator M40
4.2.1 Indicator M40 - limit switches
The M40 indicator can be fitted with a maximum of two limit switches. The limit switch works as
a slot sensor which is inductively activated via the semi-circular metal vane of the pointer. The
switching points are set using the contact pointer. The position of the contact pointer is displayed
on the scale.
Limit switch module
H250 M40
1 Min. contact
2 Max. contact
3 Locking screw
4 Maximum pointer
5 Connection terminal
The connecting terminals have a pluggable design and can be removed in order to connect the
cables. The built-in limit switch types are shown on the indicator.
Electrical connection of the limit switches
ContactMINMAX
Terminal no.123456
Connection 2-wire NAMUR-+-+
Connection 3-wire+-+-
Connection Reed SPST+-+-
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