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Supplementary instructions
Supplementary instructions
DK32 DK34
DK32 DK34
DK32 DK34DK32 DK34
Supplementary instructions Supplementary instructions
Variable area flowmeter
with electrical built-ins
Equipment category II 2 G
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CONTENTS
DK32 DK34
1 Safety instructions 3
1.1 General notes ................................................................................................................... 3
1.2 EC conformity ................................................................................................................... 3
1.3 Approval according to the IECEx scheme ........................................................................ 3
1.4 Security information......................................................................................................... 3
2 Device description 4
2.1 Device description ............................................................................................................ 4
2.2 Description code............................................................................................................... 4
2.3 Marking............................................................................................................................. 4
2.4 Flammable products ........................................................................................................ 5
2.5 Equipment category .........................................................................................................5
2.6 Types of protection ........................................................................................................... 5
2.7 Ambient temperature / temperature classes.................................................................. 6
2.8 Electrical data................................................................................................................... 7
3 Installation 8
3.1 Installation........................................................................................................................ 8
4 Electrical connections 9
4.1 General notes ................................................................................................................... 9
4.2 Earthing and equipotential bonding ............................................................................... 10
5 Operation 11
5.1 Start-up........................................................................................................................... 11
5.2 Operation ........................................................................................................................ 11
6 Service 12
6.1 Maintenance ................................................................................................................... 12
6.2 Dismantling .................................................................................................................... 12
7 Notes 13
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DK32 DK34
1.1 General notes
These additional instructions apply to explosion-protected versions of variable area flowmeters
with electrical built-ins and the marking II 2 G. They complement the Installation and Operation
Instructions for the non-explosion protected versions.
The information given in these Instructions contains only the data relevant to Category 2
explosion protection. The technical details given in the Installation and Operation Instructions for
the non-explosion protected versions apply unchanged unless excluded or superseded by these
Instructions.
1.2 EC conformity
The manufacturer declares with the EC Declaration of Conformity on his own responsibility
conformity with the protection goals of Directive 94/9/EC for use in hazardous areas with gas.
The EC Type Examination Certificate of the Physikalisch Technische Bundesanstalt (PTB) forms
the basis of the EC Declaration of Conformity:
SAFETY INSTRUCTIONS 1
PTB 99 ATEX 2191
PTB 99 ATEX 2191
PTB 99 ATEX 2191PTB 99 ATEX 2191
If required the EC Type Test Certificate can be downloaded under www.krohne.com.
1.3 Approval according to the IECEx scheme
Conformity with IECEx standards was tested in accordance with the IECEx Certification Scheme
for Explosive Atmospheres as per IEC 60079-0 and IEC 60079-11. The number of the IEC
certificate is:
IECEx PTB 09.0025
IECEx PTB 09.0025
IECEx PTB 09.0025IECEx PTB 09.0025
1.4 Security information
Assembly, installation, start-up and maintenance may only be performed by personnel trained in
explosion protection!
CAUTION!
The operator respectively his agent is responsible to follow further standards, directives or laws
if required due to operating conditions or place of installation. This applies particularly for the
use of easy detachable process connections such as SMS or Clamp when measuring flammable
mediums.
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2 DEVICE DESCRIPTION
2.1 Device description
Variable area flowmeters measure and display the volume flow of flammable and nonflammable gases and liquids. The display houses one or two separately adjustable electrical
limit switches.
2.2 Description code
The safety description code * consists of the following elements:
1 32 - with valve and horizontal connection / 34 without valve and vertical connection
2 RE - inlet pressure regulator / RA - outlet pressure regulator
3 K1 - one limit switch / K2 - two limit switches
4 S - plug connector / L - cable gland incl. cable
5 HT - high-temperature version
6 A - Limit switch tested for EC type approval or IECEx tested
7 Ex - Explosion-protected equipment
DK32 DK34
* positions which are not needed are omitted (no blank positions)
2.3 Marking
The type marking of the instrument is realized visibly with the rating plate shown below. The
interior of the display has an additional marking with the serial number (P/A).
1 Device type
2 Manufacturer
3 Notified ATEX body
4 PED data
5 Sizing data: temperature & pressure rating
6 Ex-data according to PTB 99 ATEX 2191 and IECEx PTB 09.0025
7 Built-in equipment
8 Note manual
9 KROHNE website
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DK32 DK34
2.4 Flammable products
Atmospheric conditions:
Atmospheric conditions:
Atmospheric conditions:Atmospheric conditions:
An explosive atmosphere is a mixture of air and flammable gases, vapours, mists or dusts under
atmospheric conditions. The following values define it
= -20...+60°C / -4...+140°F and P
T
atm
Outside of this range, no key data are available as to ignition behaviour for most mixtures.
Installation condititions:
Installation condititions:
Installation condititions:Installation condititions:
Variable area flowmeters operate outside of atmospheric conditions, which means that
explosion protection according to Directive 94/9/EC (ATEX) – regardless of the zone assignment
– is fundamentally not applicable due to the lack of key safety data for the interior of the
measuring section.
WARNING!
Operation with flammable products is only permitted as long as no explosive fuel/air mixture
builds up on the inside of the flowmeter under operating conditions. The operator is responsible
for ensuring that the flowmeter is operated safely as regards the temperature and pressure of
the products used. In case of operation with flammable products the measuring units must be
included in the periodic pressure tests of the system. When using the device version H250/C...
(PTFE-liner, nonconductive) the min. conductivity of the medium must be 10
avoid the electrostatic charge.
= 0.8...1.1 bar.
atm
DEVICE DESCRIPTION 2
-8
S/m, in order to
2.5 Equipment category
The flowmeters are designed in Category II 2G according to EN 60079-0 and EN 60079-11 for use
in Zone 1.
2.6 Types of protection
The variable-area flowmeter is designed in Intrinsic Safety type of protection, protection level
“ia“ according to EN 60079-11.
The marking refering to ATEX is: II 2G Ex ia IIC T6 Gb
The marking refering to IECEx is: Ex ia IIC T6 Gb
The marking contains the following information:
The marking contains the following information:
The marking contains the following information:The marking contains the following information:
II
II Explosion protection Group II
IIII
2222 Device category 2
GGGG Gas explosion protection
ia
ia Intrinsic Safety type, protection level “ia“
iaia
IIC
IIC suitable for gas group IIC, IIB and IIA
IICIIC
T6
T6 suitable for temperature class T6 ... T1
T6T6
Gb
Gb EPL, suitable for zone 1
GbGb
II 2G Ex ia IIC T6 Gb
II 2G Ex ia IIC T6 GbII 2G Ex ia IIC T6 Gb
Ex ia IIC T6 Gb
Ex ia IIC T6 GbEx ia IIC T6 Gb
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2 DEVICE DESCRIPTION
2.7 Ambient temperature / temperature classes
Due to the influence of the product temperature, variable area flowmeters with built-in electrical
equipment (electric variants) are not assigned to any fixed temperature class. The temperature
class of these devices is rather a function of the product temperature and ambient temperature
that is present and the specific device version. Please see the following tables for the
assignments.
The tables take into account the following parameters:
• Ambient temperature T
• Product temperature T
INFORMATION!
The maximum permissible product temperatures listed in the tables are valid under
the following conditions:
•
The measuring device is installed and operated in accordance with the installation
instructions in the installation and operating manual.
•
It must be ensured that the flowmeter is not heated by the effects of additional
heat radiation (sunshine, neighbouring system components) and
thus operated above the permissible ambient temperature range.
•
Insulation must be limited to the piping.
Unobstructed ventilation of the indicator part must be ensured.
amb.
m
DK32 DK34
DK3./../.././../A–Ex permissible medium and ambient temperatures
Temperature
class
T6 -20...+40 -4...+104 75 167 80 176
T5 -20...+40 -4...+104 100 212 100 212
T4 -20...+40 -4...+104 135 275 135 275
T3...T1 -20...+40 -4...+104 135 275 150 302
Ambient
temperature
Maximum permissible medium temperature
with connector (S) or cable gland (L)
Type DK32 Type DK34
[°C] [°F] [°C] [°F] [°C] [°F]
-20...+50 -4...+122 70 158 70 158
-20...+60 -4...+140 60 140 60 140
-20...+50 -4...+122 95 203 100 212
-20...+60 -4...+140 85 185 90 194
-20...+50 -4...+122 130 266 135 275
-20...+60 -4...+140 120 248 130 266
-20...+90 -4...+194 90 194 90 194
-20...+50 -4...+122 130 266 140 284
-20...+60 -4...+140 120 248 130 266
-20...+90 -4...+194 90 194 90 194
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DK32 DK34
2.8 Electrical data
The electronic signal output may only be connected to intrinsically safe circuits. Depending on
the instrument design, the following maximum values apply per circuit:
Design DK3./../.././../A–Ex
DEVICE DESCRIPTION 2
U
i
I
i
P
i
16 VDC
25 mA
64 mW
Irrespective of the instrument design the following values are to be observed for each
intrinsically safe circuit in case of interconnection:
C
i
L
i
150 nF
150 µH
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3 INSTALLATION
3.1 Installation
Installation and setup must be carried out according to the applicable installation installation
standards (e.g. EN 60079-14) by qualified personnel trained in explosion protection. The
information given in the Installation and Operation Instructions and the Supplementary
Installation and Operation Instructions must always be observed.
Variable area flowmeters must be installed in such a way that
• There is no danger from mechanical impact effects.
• There are no external forces affecting the indicator part.
• The device is accessible for any visual inspections that are necessary, and can be viewed from
all sides.
• The nameplate is clearly visible.
• It can be operated from a location with secure footing.
CAUTION!
The manufacturer is not liable for any damage resulting from improper use or use other than the
intended purpose. This applies in particular to hazards due to insufficient corrosion resistance
and suitability of the materials in contact with product.
DK32 DK34
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DK32 DK34
4.1 General notes
For version DK3./../../S/../A-Ex (plug), the separate intrinsically safe signal circuits with level of
protection "ia" or "ib" are electrically connected in the terminal compartment of the plug
housing and for version DK3./../../L/../A-Ex (connecting cable) it is the connecting cable as
illustrated in the connection diagram. Permissible maximum values (electrical data) must be
observed.
Connecting cable
The connecting cables must be selected according to prevailing installation standards (e.g.
EN 60079-14). The outer diameter of the connecting cable must be within the sealing range of
the cable entry. The connecting cables must be fixed and laid in such a way as to be sufficiently
protected against damage.
All cores that are not used must be securely connected to the earth potential of the hazardous
area or carefully insulated against each other and against earth (test voltage ≥ 500 V
Cable entries / Blanking plugs
The DK3./../../S/../A-Ex variable area flowmeter is equipped with a connector. The connector
guarantees protection from foreign bodies and water (protection category) IP65 as per EN 60529.
The cable entry is closed with a plug. The plug is to be replaced with a suitable connecting cable
(nominal diameter range 6...9mm).
ELECTRICAL CONNECTIONS 4
).
eff
Connection diagrams
Contact connection Cable colors of assembled cable
1 Min minus white
2 Min plus yellow
3 Max minusMax minus green
4 Max plus brown
5 Lift slot
6 Fastening screw of connection box
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4 ELECTRICAL CONNECTIONS
4.2 Earthing and equipotential bonding
If the device is not sufficiently electrostatically grounded via the process cables, an additional
earth connection must be established using the earth screw 1. The position of the ground
terminal is illustrated below. The connection guarantees only an electrostatic connection of the
device and does not comply with the requirements of an equipotential bonding connection.
DK32 - DK34
DK32 DK34
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DK32 DK34
5.1 Start-up
Start-up is only permitted when the variable area flowmeter:
• is correctly installed in the system and connected.
• has been checked for the proper state with regard to its installation and connection
requirements.
The user of the system must have it checked before start-up in compliance with the national
regulations for checks before startup.
5.2 Operation
Setting of the limit switches may be carried out during operation. Remove the housing cover to
this purpose. The housing cover has to be closed immediately after the limit switches have been
set.
OPERATION 5
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6 SERVICE
6.1 Maintenance
Maintenance work of a safety-relevant nature within the meaning of explosion protection may
only be carried out by the manufacturer, his authorised representative or under the supervision
of authorised inspectors.
For systems in hazardous areas, regular tests are required in order to maintain the proper
condition.
The following checks are recommended:
• Checking the housing, the cable entries and the feed lines for corrosion and/or damage.
• Checking the measuring unit and the piping connections for leakage.
The cover is to be closed following maintenance work on the display unit.
6.2 Dismantling
Replacing the display part
Due to the modular design of the variable area flowmeter, it is possible to replace a complete
display with an identical spare part in accordance with safety guidelines.
DK32 DK34
CAUTION!
There may be a loss of measuring accuracy!
Exchanging the entire device
Removal and installation is the user's responsibility.
Any replacement and removal should take place in a de-energized state if possible. If that is not
possible, the basic conditions for intrinsic safety (e.g. no grounding or connection of different
intrinsically safe circuits to one another) must be observed during dismantling.
CAUTION!
•
Pressurized pipes must be depressurized before removing the measuring section.
•
In the case of environmentally critical or hazardous products, appropriate safety precautions
must be taken with regard to residual liquids in the measuring unit.
•
New seals must be used when re-installing the device in the piping.
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DK32 DK34
NOTES 7
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7 NOTES
DK32 DK34
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DK32 DK34
NOTES 7
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KROHNE product overview
• Electromagnetic flowmeters
• Variable area flowmeters
• Ultrasonic flowmeters
• Mass flowmeters
• Vortex flowmeters
• Flow controllers
• Level meters
• Temperature meters
• Pressure meters
• Analysis products
• Products and systems for the oil & gas industry
• Measuring systems for the marine industry
Head Office KROHNE Messtechnik GmbH
Ludwig-Krohne-Str. 5
47058 Duisburg (Germany)
Tel.:+49 (0)203 301 0
Fax:+49 (0)203 301 10389
info@krohne.de
The current list of all KROHNE contacts and addresses can be found at:
© KROHNE 11/2012 - 4000422303 AD DK32/34 II2G R03 en - Subject to change without notice.
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