KROHNE BM26A-5000 User manual

Bypass chamber for level transmitters:
- OPTIFLEX 7200 Guided Radar
- OPTIFLEX 8200 Guided Radar
- OPTIWAVE 7400 24 GHz FMCW Radar
- BW25 Displacer-Type
BM26A-5000
BM26A-5000BM26A-5000
BM26A-5000 Handbook
HandbookHandbook
Handbook
© KROHNE 01/2021 - 4008339901 - HB BM26A-5000 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 2021 by
KROHNE Messtechnik GmbH - Ludwig-Krohne-Str. 5 - 47058 Duisburg (Germany)
: IMPRINT :::::::::::::::::::::::::::::::::::::::

CONTENTS
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BM26A-5000
1 Safety instructions 5
1.1 Intended use ..................................................................................................................... 5
1.2 Certification ...................................................................................................................... 5
1.3 EU Pressure Equipment Directive ................................................................................... 6
1.4 Safety instructions from the manufacturer ..................................................................... 7
1.4.1 Disclaimer ............................................................................................................................... 7
1.4.2 Product liability and warranty ................................................................................................ 8
1.4.3 Information concerning the documentation........................................................................... 8
1.4.4 Warnings and symbols used................................................................................................... 9
1.5 Safety instructions for the operator................................................................................. 9
2 Device description 10
2.1 Scope of delivery............................................................................................................. 10
2.2 Device description .......................................................................................................... 10
2.3 Nameplates .................................................................................................................... 12
2.3.1 Location of device labels....................................................................................................... 12
2.3.2 Bypass chamber nameplate .................................................................................................13
3 Installation 14
3.1 Storage ........................................................................................................................... 14
3.2 Transportation................................................................................................................ 14
3.3 Installation - bypass chamber........................................................................................ 14
3.3.1 General notes........................................................................................................................ 14
3.3.2 Isolation valves...................................................................................................................... 14
3.4 Level transmitter options............................................................................................... 15
4 Electrical connections 16
4.1 OPTIFLEX 7200 guided radar level transmitter ............................................................. 16
4.2 OPTIFLEX 8200 guided radar level transmitter ............................................................. 16
4.3 OPTIWAVE 7400 24 GHz FMCW radar level transmitter................................................ 16
4.4 BW25 displacer-type level transmitter.......................................................................... 16
4.5 Grounding connection .................................................................................................... 16
5 Start-up 17
5.1 Start-up checklist........................................................................................................... 17
5.2 How to start the device................................................................................................... 17
6 Operation 18
6.1 Operating concept ..........................................................................................................18
6.2 Description of display .....................................................................................................18

CONTENTS
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BM26A-5000
6.3 Configuration of the level transmitter ........................................................................... 18
6.3.1 OPTIFLEX 7200 guided radar level transmitter ................................................................... 18
6.3.2 OPTIFLEX 8200 guided radar level transmitter ................................................................... 18
6.3.3 OPTIWAVE 7400 FMCW radar level transmitter................................................................... 18
6.3.4 BW25 displacer-type level transmitter ................................................................................ 18
6.4 Errors.............................................................................................................................. 18
7 Service 19
7.1 Periodic maintenance..................................................................................................... 19
7.2 Service warranty............................................................................................................. 19
7.3 Availability of services .................................................................................................... 19
7.4 Returning the device to the manufacturer..................................................................... 20
7.4.1 General information.............................................................................................................. 20
7.4.2 Form (for copying) to accompany a returned device............................................................ 21
7.5 Disposal .......................................................................................................................... 22
8 Technical data 23
8.1 Measuring principle........................................................................................................23
8.2 Technical data................................................................................................................. 24
8.3 Dimensions ..................................................................................................................... 28
8.3.1 PN40 - Class 300................................................................................................................... 28
8.3.2 PN100 - Class 600................................................................................................................. 30
8.3.3 PN250 - Class 1500............................................................................................................... 32
8.3.4 PN400 - Class 2500............................................................................................................... 34
8.3.5 Accessories ........................................................................................................................... 36
8.4 Maximum process pressure: bypass chamber.............................................................. 37
8.4.1 Magnetic level indicator with a 316 / 316 L bypass chamber .............................................. 37
8.4.2 Magnetic level indicator with a 304 L bypass chamber ....................................................... 40
9 Appendix 42
9.1 Glossary .......................................................................................................................... 42
10 Notes 43

SAFETY INSTRUCTIONS 1
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1.1 Intended use
The BM26A-5000 is a bypass chamber designed for use with a FMCW Radar (non-contact radar),
TDR (guided radar) or displacer-type level transmitter.
This bypass chamber is connected to open or pressurized tanks. With the applicable options, it is
resistant to difficult service conditions and liquids that are poisonous, flammable, or that cause
corrosion.
This document does not have data about the level transmitters. For more data, refer to the
related handbook:
•If this bypass chamber has the OPTIFLEX 7200 option, then refer also to the
OPTIFLEX 7200 C/F/S/D handbook.
•If this bypass chamber has the OPTIFLEX 8200 option, then refer also to the
OPTIFLEX 8200 C/F/S handbook.
•If this bypass chamber has the OPTIWAVE 7400 option, then refer also to the
OPTIWAVE 7400 C handbook.
•If this bypass chamber has the BW25 option, then refer also to the BW25 handbook.
1.2 Certification
The manufacturer certifies successful testing of the product by applying the CE marking. For
more data about the EU Directives and European Standards related to this device, refer to the EU
Declaration of Conformity. You can download this document free of charge from the website
(Download Center).
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.
DANGER!
The bypass chamber cannot cause ignition of gases and dust because the bypass chamber does
not have parts that move. Thus, the bypass chamber does not have an Ex approval option.
DANGER!
Level transmitter options
Level transmitter optionsLevel transmitter options
Level transmitter options:
If the level transmitter is used in a potentially explosive atmosphere, then it must have the
appropriate Ex approval option. For more data, refer to the Ex supplementary instructions for
the level transmitter.
CE marking

1 SAFETY INSTRUCTIONS
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1.3 EU Pressure Equipment Directive
These devices are designed, assembled and tested to agree with the EU Pressure Equipment
Directive (PED). The CE mark on the nameplate shows that the manufacturer did a conformity
assessment. The PED conformity assessment is approved by a Notified Body. The identification
number of the Notified Body is given on the nameplate.
A code on the nameplate gives data about the PED rating of the device:
For more data about the nameplate refer to
Bypass chamber nameplate on page 13 ("Namur").
The manufacturer did a risk analysis on the device that agrees with the Pressure Equipment
Directive. All personnel must know the design and operating conditions that follow to prevent the
risk of damage and injury:
•This device is designed to function at almost constant pressure and temperature conditions.
A maximum of 500 cycles is permitted along the full pressure range. A maximum of 2000
cycles is permitted along the full temperature range.
•This device is not designed for operating conditions where vibration or fatigue stress is
present.
•Events that are not taken into account in the calculations include exceptional risks such as:
earthquakes, bad weather, fire etc..
•The standard design calculation does not take into account the theoretical coefficient of
corrosion. The product circulating in the device must not have properties that cause surface
erosion.
•Our conformity declaration is limited to the parts of the device that are pressurized. It does
not include parts that can be dismantled (valves etc.).
•The process connections must be attached correctly to prevent mechanical stress. The axis
of the process connection must be parallel to and centred with the axis of the tank's process
connections. Tighten the process connections in agreement with the design code.
•The user must take necessary steps to protect the installed device from shock waves (water
hammer). A pressure-limiting valve must protect the installation.
Example: PED/G1/III
GGases and vapours
1Fluid group 1
III Category III
Table 1-1: Example of PED rating
WARNING!
The process pressure (PS) and process temperature (TS) are given on the device nameplate and
are only applicable to your bypass chamber. Do not use the device at a process pressure more
than the maximum limit for a given process temperature. For more data, refer to Maximum
process pressure: bypass chamber on page 37
.
WARNING!
If the device has an Ex approval, then you must obey other temperature limits. For more data,
refer to the Ex supplementary instructions.

SAFETY INSTRUCTIONS 1
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•The effective pressure of the installation (the maximum pressure permitted by the pressure-
limiting valve) must never be more than the maximum permitted pressure, PS. PS is marked
on the device nameplate.
•Make sure that the parts in contact with the fluid are compatible with the fluid and conform to
the ageing characteristics of the measurement environment and the fluid used. These have
either been recommended in the instructions or form the subject of a particular specification
in the contract.
•The device is designed to measure a liquid with a gas phase. It is not designed to measure
liquids that change to a solid phase because of changes in pressure (solidification) and
temperature (freezing), e.g. water and ice.
•Make sure that there are no magnetic particles in the liquid. These particles can have an
effect on the performance of the device.
•Make sure that the size of the particles in the liquid are less than 0.05 mm / 0.002¨in
diameter.
•Make sure that the device is correctly sealed. Do a leakage check between the device and the
tank.
•The external pressure, Pext, must be equal to atmospheric pressure, Patmos (Pext =
Patmos).
1.4 Safety instructions from the manufacturer
1.4.1 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.

1 SAFETY INSTRUCTIONS
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1.4.2 Product liability and warranty
Responsibility as to suitability and intended use of these bypass chambers rests solely with the
operator. The supplier does not accept any liability resulting from misuse by the operator.
Improper installation and operation of the bypass chambers may lead to loss of warranty. In
addition, the “General conditions of sale“which forms the basis of the purchase agreement are
applicable.
1.4.3 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 icons as shown below.

SAFETY INSTRUCTIONS 1
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1.4.4 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.
1.5 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
Do a check of the packing list to make sure that your device agrees with the customer order. The
device is supplied in one box.
Technical documentation for this device can be downloaded from the website (Download Centre).
2.2 Device description
The BM26A-5000 is a bypass chamber for FMCW (non-contact) radar, TDR (Guided Radar) or
displacer-type level transmitters. The level transmitter is installed on top of the bypass
chamber.
A FMCW (non-contact) radar level transmitter is designed to continuously measure the level.
A TDR (Guided Radar) level transmitter is designed to continuously measure the level, interface,
or level and interface of liquids.
A displacer-type level transmitter is designed to continuously measure the level or interface of
liquids.
The illustration that follows shows the level transmitter options:
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.
Figure 2-1: Scope of delivery
1 Bypass chamber
2 Optional level transmitter (OPTIFLEX 7200, OPTIOFLEX 8200, OPTIWAVE 7400 or BW25)
3 Quick Start

DEVICE DESCRIPTION 2
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The temperature and pressure range of a level transmitter installed on a bypass chamber is:
The bypass chamber can be made of:
•316/316L (1.4401/1.4404) stainless steel,
•304L (1.4307) stainless steel with >9.5% nickel content,
•HASTELLOY®C-276 alloy (2.4819), or
•INCONEL®nickel-chromium alloy 625 (2.4856)
Figure 2-2: Level transmitter options
1 Bypass chamber with BW25 displacer-type level transmitter
2 Bypass chamber with OPTIFLEX 7200 C TDR (Guided Radar) level transmitter
3 Bypass chamber with OPTIFLEX 8200 C TDR (Guided Radar) level transmitter
4 Bypass chamber with OPTIFWAVE 7400 C 24 GHz FMCW radar level transmitter
Device Temperature range Pressure range
[°C] [°F] [barg] [psig]
BW25 -40...+400 -40...+752 -1...400 -14.5...5802
OPTIFLEX 7200 -50...+250 -58...+482 -1...100 -14.5...1450
OPTIFLEX 8200 -50...+315 -58...+599 -1...320 -14.5...4641
OPTIWAVE 7400 -50...+200 -58...+392 -1...100 -14.5...1450
Table 2-1: Bypass chamber with a level transmitter option: pressure and temperature ranges
INFORMATION!
For more data about the level transmitter options, refer to the related handbook (BW25,
OPTIWAVE 7400, OPTIFLEX 7200 or OPTIFLEX 8200).

2 DEVICE DESCRIPTION
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2.3 Nameplates
2.3.1 Location of device labels
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 2-3: Location of device nameplates
1 Bypass chamber nameplate
2 Optional level transmitter nameplate - for more data, refer to the related handbook
INFORMATION!
For more data about the level transmitter options, refer to the related handbook (BW25,
OPTIWAVE 7400, OPTIFLEX 7200 or OPTIFLEX 8200).

DEVICE DESCRIPTION 2
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2.3.2 Bypass chamber nameplate
Figure 2-4: Bypass chamber nameplate
1 Date of manufacture (Year . Month . Day)
2 Designation code (VF or SF code given in the order)
3 Factory serial number
4 Test pressure (PT) and test date
5 Process temperature range (TS)
6 Process pressure range (PS)
7 Bypass chamber volume
8 PED marking (PED/G1/III, PED/G1/IV or PED/G2/III). This marking agrees with NAMUR Recommendation NE 080. For
more data, refer to
EU Pressure Equipment Directive on page 6.
9 Construction code
10 CE marking
PED certification agency code (0036) - if there is a PED marking given on the nameplate. Refer also to item 7on this
illustration.
11 Model name

3 INSTALLATION
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3.1 Storage
•Do not keep the device in a vertical position before installation. Put the device on its side.
•Store the device in its original packing and in dry and dust-free location.
•Storage temperature range:
Storage temperature range:Storage temperature range:
Storage temperature range: -70…+80°C/-94…+176°F
3.2 Transportation
Lift the device carefully. Make sure that the method used to transport the device is adapted to its
weight and agrees with national regulations.
3.3 Installation - bypass chamber
3.3.1 General notes
The operating conditions that are applicable for your device are given on the device nameplate.
For more data on where to find the operating conditions data for your device, refer to
Nameplates on page 12. For general technical data about the device, refer to Technical data on
page 24.
Make sure that the installation conditions obey the design constraints related to PED. For more
data, refer to
EU Pressure Equipment Directive on page 6.
Other installation conditions
•Make sure that there is no contamination (dirt etc.) or unwanted objects in the bypass
chamber.
•Install the bypass chamber vertically on the tank.
•Make sure that the device is correctly installed. The device nameplate is always at the bottom
of the device.
•Select bolts and gaskets (not supplied) that agree with the pressure rating of the process
connection and the process pressure.
•Make sure that mechanical loadings do not cause damage to the process connections. If
necessary, put support brackets on the device.
3.3.2 Isolation valves
We recommend that you install isolation valves between the device and the tank. The device can
then be easily removed from the tank for the cleaning procedure. Drain the device only when it is
isolated from the tank.
DANGER!
Make sure that the outer surface temperature of the device is less than +60
° C / +140 ° F. If the
surface temperature is more than +60
° C / +140 ° F, use the device with precautions that agree
with health and safety rules and regulations.
WARNING!
Stay away from the process connections. If you stand on the process connections, you can cause
damage to the device and the installation.

INSTALLATION 3
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3.4 Level transmitter options
The level transmitter (OPTIFLEX 7200, OPTIFLEX 8200, OPTIWAVE 7400 or BW25) is attached to
the bypass chamber at the factory.

4 ELECTRICAL CONNECTIONS
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4.1 OPTIFLEX 7200 guided radar level transmitter
This device is supplied as an option with the bypass chamber. For the electrical connection
procedure, refer to the OPTIFLEX 7200 C/F/S/D handbook.
4.2 OPTIFLEX 8200 guided radar level transmitter
This device is supplied as an option with the bypass chamber. For the electrical connection
procedure, refer to the OPTIFLEX 8200 /C/F/S handbook.
4.3 OPTIWAVE 7400 24 GHz FMCW radar level transmitter
This device is supplied as an option with the bypass chamber. For the electrical connection
procedure, refer to the OPTIFLEX 7400 C handbook.
4.4 BW25 displacer-type level transmitter
This device is supplied as an option with the bypass chamber. For the electrical connection
procedure, refer to the BW25 handbook.
4.5 Grounding connection
Figure 4-1: Bypass chamber - location of grounding terminal
1 Bypass chamber nameplate
2 Grounding terminal on the side of the nameplate

START-UP 5
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5.1 Start-up checklist
Do these checks before you use the device:
•Are all the wetted components (bypass chamber, flanges and gaskets) resistant to the
product in the tank?
•Does the information on the nameplate agree with the operating data? For more data about
nameplates, refer to
Nameplates on page 12.
•Did you correctly install the device on the tank?
•Device options: Do the electrical connections agree with the national electrical codes?
•Do the electrical cables have properties that are applicable to the operating conditions?
5.2 How to start the device
• Attach the drainage plugs or close the drainage cock.
• Slowly open the isolation valves on the top and bottom process connections.
• Do a leak test.
• Energize the electrical equipment.
iEnd of the procedure.
DANGER!
Devices with Ex approval options: Make sure that the bypass chamber, electrical equipment and
the installation agree with the requirements of all the related Ex certificates of compliance.
CAUTION!
If the device has a level transmitter option or electric heat tracing equipment, obey the
instructions given in the related handbooks for this equipment.
DANGER!
Low-temperature or high-temperature versions: risk of burns. Put on protective clothing when
you go near the device.
WARNING!
Do the servicing of device regularly to agree with the regulations of the site that it is installed on.
CAUTION!
Risk of damage to the device from shock waves. Open the valves slowly to prevent damage from
water hammer. Use a pressure-limiting valve to prevent damage to the installation.

6 OPERATION
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6.1 Operating concept
You can read level or interface measurements with a level transmitter that uses guided radar
(TDR), FMCW radar or displacer-type measurement technology. Output options include
4...20 mA, 4...20 mA + HART, FOUNDATION™fieldbus and PROFIBUS PA. An integrated display
screen is also available.
6.2 Description of display
For more data about the display screen, refer to the handbook related to the level transmitter
option.
6.3 Configuration of the level transmitter
6.3.1 OPTIFLEX 7200 guided radar level transmitter
This device is supplied as an option with the bypass chamber. For the device configuration
procedure, refer to the OPTIFLEX 7200 C/F/S/D handbook.
6.3.2 OPTIFLEX 8200 guided radar level transmitter
This device is supplied as an option with the bypass chamber. For the device configuration
procedure, refer to the OPTIFLEX 8200 C/F/S handbook.
6.3.3 OPTIWAVE 7400 FMCW radar level transmitter
This device is supplied as an option with the bypass chamber. For the device configuration
procedure, refer to the OPTIFLEX 7400 C handbook.
6.3.4 BW25 displacer-type level transmitter
This device is supplied as an option with the bypass chamber. For the device configuration
procedure, refer to the BW25 handbook.
6.4 Errors
For more data about error handling, refer to the handbook related to the level transmitter
option.

SERVICE 7
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7.1 Periodic maintenance
This device does not normally need maintenance. If the liquid is contaminated or build-up of
deposits is possible, we recommend that you flush the device regularly.
How to flush the device
• Open the drain plug or drain valve.
• Flush the chamber.
iEnd of the procedure.
7.2 Service warranty
Maintenance is not necessary for most applications.
Servicing by the customer is limited by warranty to
•screws, nuts, studs, gaskets and counter flanges for flanged connections
•male and female plugs for drains and vents
•ball valves
•support brackets for the bypass chamber
Use only KROHNE-authorized service staff to repair the device.
7.3 Availability of services
The manufacturer offers a range of services to support the customer after expiration of the
warranty. These include repair, maintenance, technical support and training.
WARNING!
The device must be regularly serviced to conform to the rules and regulations applicable to the
site that it is installed on.
WARNING!
Follow accident prevention regulations carefully when you do work near pressurized tanks and
dangerous chemical products.
WARNING!
If you open the drain valve, make sure that you close the tank isolation valves first.
WARNING!
If the bypass chamber has Ring Joint gaskets, then make sure that you replace the gasket each
time that you remove the bottom flange.
INFORMATION!
For more precise information, please contact your local sales office.

7 SERVICE
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7.4 Returning the device to the manufacturer
7.4.1 General information
This device has been carefully manufactured and tested. If installed and operated in accordance
with these operating instructions, it will rarely present any problems.
WARNING!
Should you nevertheless need to return a device for inspection or repair, please pay strict
attention to the following points:
• Due to statutory regulations on environmental protection and safeguarding the health and
safety of the personnel, the manufacturer may only handle, test and repair returned devices
that have been in contact with products without risk to personnel and environment.
• This means that the manufacturer can only service this device if it is accompanied by the
following certificate (see next section) confirming that the device is safe to handle.
WARNING!
If the device has been operated with toxic, caustic, radioactive, flammable or water-endangering
products, you are kindly requested:
• to check and ensure, if necessary by rinsing or neutralising, that all cavities are free from
such dangerous substances,
• to enclose a certificate with the device confirming that it is safe to handle and stating the
product used.