KROHNE H250 M10 Wiring diagram

Variable area flowmeter
Equipment category II 2G
Equipment category II 2GEquipment category II 2G
Equipment category II 2G
H250 M10
H250 M10H250 M10
H250 M10 Supplementary instructions
Supplementary instructionsSupplementary instructions
Supplementary instructions
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CONTENTS
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H250 M10
1 Safety instructions 3
1.1 General notes ................................................................................................................... 3
1.2 EC conformity ................................................................................................................... 3
1.3 Safety instructions............................................................................................................ 3
2 Device description 4
2.1 Device description ............................................................................................................ 4
2.2 Description code............................................................................................................... 4
2.3 Marking............................................................................................................................. 5
2.4 Flammable products ........................................................................................................ 6
2.5 Equipment category .........................................................................................................6
2.6 Protection types................................................................................................................ 7
2.7 Ambient temperature / temperature classes.................................................................. 7
2.8 Electrical data................................................................................................................... 8
3 Installation 9
3.1 Installation........................................................................................................................ 9
3.2 Special conditions............................................................................................................. 9
4 Electrical connections 10
4.1 General notes ................................................................................................................. 10
4.2 Power supply .................................................................................................................. 10
4.3 Inputs / outputs .............................................................................................................. 11
4.4 Earthing and equipotential bonding............................................................................... 12
5 Operation 13
5.1 Start-up........................................................................................................................... 13
5.2 Operation ........................................................................................................................ 13
6 Service 14
6.1 Maintenance ................................................................................................................... 14
6.2 Dismantling .................................................................................................................... 14
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SAFETY INSTRUCTIONS 1
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H250 M10
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Safety instructions
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 standard documentation
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 standard documentation 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 Test Certificate of the Physikalisch Technische Bundesanstalt (PTB)
forms the basis of the EC Declaration of Conformity:
The EC type test certificate may be downloaded from the manufacturer's website as needed.
1.3 Safety instructions
Assembly, installation, start-up and maintenance may only be performed by personnel trained in
explosion protection!
PTB 01 ATEX 1154
PTB 01 ATEX 1154PTB 01 ATEX 1154
PTB 01 ATEX 1154
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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2DEVICE DESCRIPTION
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H250 M10
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Device description
2.1 Device description
Variable area flowmeters measure and display the volume flow of flammable and non-
flammable gases and liquids. The display unit contains a 4...20 mA signal output with optional
HART®communication, two programmable electronic switch outputs and a reset input.
2.2 Description code
The safety description code * consists of the following elements:
* positions which are not needed are omitted (no blank positions)
1 Materials / versions
RR - Stainless Steel
C - PTFE or PTFE/ceramics
HC - Hastelloy
Ti - Titanium
F - aseptic version (food)
2 Series of indicators
M10 - Converter M10
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DEVICE DESCRIPTION 2
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H250 M10
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2.3 Marking
Type designation of the complete unit is shown on the indicator with the nameplates reproduced
below (see also description code).
Additional markings on the housing cover:
•SN - serial number
•SO - sales order / item
•P/A - order
•Vxxx - product configurator code
•AC - article code
1 Device type
2 Manufacturer
3 ATEX & DGRL certification agency code.
4 Year of manufacture
5 Production order No.
6 Ex data
7 Electrical connection data
8 Observe operating instructions
9 Manufacturer's website
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2DEVICE DESCRIPTION
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H250 M10
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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
Tatm = -20...+60°C / -4...+140°F and Patm = 0.8...1.1 bar.
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.
2.5 Equipment category
Variable area flowmeters are designed according to EN 60079-0:2009 and EN 60079-1:2007 in
Category II 2 G for use in zone 1. The parts inside the measuring unit are also approved for use in
zone 1.
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
-8
S/m, in order to
avoid the electrostatic charge.
INFORMATION!
Definition of zone 1 acc. to EN 1127-1, Appendix B:
An area in which an explosive atmosphere may occasionally occur as a result of the mixture of
flammable substances in the form of gas, steam or mist with air under normal operation.
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DEVICE DESCRIPTION 2
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H250 M10
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2.6 Protection types
The variable area flowmeter is designed with protection type flameproof enclosure "d", acc. to
EN 60079-1.
The marking is: II 2G Ex d IIC T6
II 2G Ex d IIC T6II 2G Ex d IIC T6
II 2G Ex d IIC T6
2.7 Ambient temperature / temperature classes
Because of the influence of the temperature of the product, no fixed temperature class is
assigned to variable area flowmeters. In fact, the temperature class of a device is a function of
the temperature of both the product and the environment. Please see the following tables for the
assignments.
The tables take into account the following parameters:
•Maximum values Pv
•Ambient temperature Tamb.
•Product temperature Tm
•Heat resistance of the connecting cable
For certain device version, lower values apply due to differing boundary conditions (e.g. lining
materials). Here the user should consult the technical data sheet.
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
IIII
II Explosion protection Group II
2
22
2Equipment category 2
G
GG
GGas explosion protection
Ex d
Ex dEx d
Ex d Electronics compartment - protection type flameproof enclosure "d"
IIC
IICIIC
IIC Suitable for gas groups IIC, IIB and IIA
T6
T6T6
T6 Suitable for temperature classes T6 ... T1
Gb
GbGb
Gb EPL, suitable for zone 1
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 standard documentation.
• 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.
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2DEVICE DESCRIPTION
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H250 M10
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Maximum permissible product and ambient temperatures per temperature class
The cable glands and line entries must have the same degree of thermal stability as the
connecting cable.
The minimum product temperature is -40°C / -40°F.
2.8 Electrical data
Temperature
class
Ambient
temperature
Product temperature at permanent service temperature
of connecting cable
70°C / 158°F80°C / 176°F90°C / 194°F
[°C] [°F] [°C] [°F] [°C] [°F] [°C] [°F]
T6 -40...+60 -40...+140 85 185 85 185 85 185
T5 -40...+50 -40...+122 100 212 100 212 100 212
-40...+60 -40...+140 85 185 100 212 100 212
T4 -40...+50 -40...+122 135 275 135 275 135 275
-40...+60 -40...+140 85 185 135 275 135 275
T3...T1 -40...+40 -40...+104 180 356 200 392 200 392
-40...+50 -40...+122 135 275 190 374 200 392
-40...+60 -40...+140 85 185 145 293 200 392
Electrical equipment Rated voltage Nominal current
Signal output M10 24 VDC ±30% 4...20 mA
with HART®communication
Binary outputs B1 and B2 8...30 VDC max. 100 mA
Reset input 5...30 VDC ≤1 mA
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INSTALLATION 3
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H250 M10
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Installation
3.1 Installation
Installation and setup must be carried out according to the applicable installation standards (e.g.
EN 60079-14) by qualified personnel trained in explosion protection. The information given in the
manuals and the supplementary instructions must be observed at all times.
Variable area flowmeters must be installed in such a way that
•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.
3.2 Special conditions
Equipotential bonding
Variable area flowmeters must be included in the equipotential bonding of the hazardous area.
Electronics compartment lock
The variable area flowmeter's flameproof electronics compartment must be locked during
operation. The cover of the electronics compartment is secured by a lock. An SW3 Allen screw is
used for the safety screw. With temperature classes T6 and T5, a waiting time of 8 minutes must
be observed prior to opening. For temperature classes T4...T1 the waiting time is not needed.
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.
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4ELECTRICAL CONNECTIONS
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H250 M10
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Electrical connections
4.1 General notes
Rated values for insulation
•The insulation of the H.../..../M10 - Ex variable area flowmeters is rated in compliance with
IEC 60 664-1. The following rating parameters are taken into account:
•Overvoltage category for signal and instrument loops: II
•Pollution degree of the insulation: 2
Terminal compartment
The electrical connections for the power supply and I/O functions are located in the signal
converter's electronics compartment. The protection type of the electronics compartment is "d".
Unused openings shall be closed in compliance with EN 60079-1. The cables can be routed into
the flameproof electronics compartment in two different ways.
•Direct entry of the connecting cables by way of approved flameproof cable glands (M20x1.5)
into the flameproof terminal compartment (V ≤2000cm³). The cable glands require a
separate test certificate in accordance with EN 60079-1. Observe the requirements of the test
certificate for the cable glands.
•Direct entry of the connecting cables by way of conduits into the flameproof enclosed
terminal compartment of the device. Once the conduit has been screwed in, it must form a
flameproof joint with the housing with a minimum thread length of 8 mm. A suitable
mechanical stopping box must be provided in accordance with installation provisions. The
conduit must be installed in compliance with its separate test certificate.
Connecting cables
Connecting cables shall comply with relevant installation standards (e.g., EN 60079-14 / VDE
0165). The outer diameter of the connecting wires shall conform to the cable clamping area for
the supplied cable entries.
The wiring for the variable area flowmeter's electrical connection shall be fixed.
4.2 Power supply
The variable area flowmeter does not require a separate power supply. The required supply for
the built-in electronics is provided via the 4...20mA current output.
CAUTION!
The IP protection category of the signal converter housing is largely determined by the cable
gland used and the installation.
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