Reliable Measurement of Gas
Transmitter unit for meter reading ENCO08 u. ENCO08-M
Status: 2018, September 10th
Version: 05
OPERATING INSTRUCTIONS
Kontakt
Manual ENCO 08-M · EN05 · 2018, September 10th
Manufacturer
Our customer service is available for technical queries
Address
RMG Messtechnik
GmbH
Otto-Hahn-Straße 5
D-35510 Butzbach
Phone switchboard
+49 6033 897 – 0
Phone service
+49 6033 897 – 0
Phone spare parts
+49 6033 897 – 173
Fax
+49 6033 897 – 130
E-mail
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Original Document
The ENCO08M_manual_05_en from
2018, September 10th for the transmitter unit
ENCO08 u. ENCO08-M is the document translated
first from the German original version. Anyhow, this
document may serve as reference for translations
into other languages. Please use in case of any
uncertainties the German version as main
reference.
Note
Unfortunately, paper is not updated automatically,
whereas technical development continuously
advances. Therefore, we reserve the right to make
technical changes in regard to the representations
and specifications of these operating instructions.
The latest version of this manual (and other
devices) can be downloaded at your convenience
from our Internet home-page
www.rmg.com.
Date created
2018, September 10th
1st revision date
Document version and
language
Document
Version
ENCO08M_manual_05_en
2018, September 10th
Language
EN
Contents
Manual ENCO 08-M · EN05 · 2018, September 10th
I
Contents
1 Introduction ........................................................... 1
1.1 Structure of the manual ......................................................................... 1
1.2 Objective of the manual ......................................................................... 1
1.2.1 Abbreviations .............................................................................................. 2
1.2.2 Symbols ....................................................................................................... 2
1.2.3 Layout of instructions ............................................................................... 2
1.2.4 Using the encoder ...................................................................................... 3
1.2.5 Risk assessment and mitigation ............................................................ 7
1.2.6 Validity of the manual ............................................................................... 8
1.2.7 Transportation .......................................................................................... 10
1.2.8 Delivery ...................................................................................................... 10
1.2.9 Dispose of packaging material ............................................................. 11
1.2.10 Storage .................................................................................................... 11
1.3 Explosion-proof design ....................................................................... 11
1.3.1 General information ................................................................................. 11
1.3.2 Junction boxes with enhanced safety ................................................ 12
1.4 Inspection and maintenance work .................................................... 13
1.4.1 General information ................................................................................. 13
2 Encoder ENCO 08 and ENCO 08-M ................... 14
2.1 Preface ..................................................................................................... 14
2.2 Operation ................................................................................................ 15
2.3 Function .................................................................................................. 16
2.4 Variants ................................................................................................... 17
2.4.1 ENCO 08 ..................................................................................................... 17
2.4.2 ENCO 08-M ................................................................................................ 18
2.5 Use in custody transfer applications ............................................... 20
2.5.1 Sealing plan ................................................................................................ 21
3 Connection and commissioning ....................... 24
3.1 General .................................................................................................... 24
3.2 Electrical Data ........................................................................................ 25
3.3 Electrical connections ......................................................................... 26
3.4 Data protocol .......................................................................................... 27
Contents
Manual ENCO 08-M · EN05 · 2018, September 10th
II
3.5 Putting into operation .......................................................................... 28
3.5.1 ENCO 08 ..................................................................................................... 28
3.5.2 ENCO 08-M ................................................................................................ 28
3.5.3 Connecting the gas flow ......................................................................... 30
Appendix .................................................................... 31
Appendix A: connection example ............................................................... 31
Appendix B: certificates / standards .......................................................... 32
1 Introduction
Manual ENCO 08-M · EN05 · 2018, September 10th
1
1 Introduction
1.1 Structure of the manual
The introduction to this manual consists of three main parts. In the first part of the
introduction, general guidelines are listed; here the symbols used and the structure
of notes are presented, but also a risk assessment is given. It also contains
specifications for the transport and storage of the ENCO 08 encoder.
ENCO 08 may be operated in hazardous areas. The second part of the
introduction deals with the conditions to be observed and describes this hazardous
area.
The third part of the introduction describes mandatory, regular inspection and
maintenance work.
The second chapter describes the function and intended use of ENCO 08. The
third chapter describes the connection and commissioning.
The appendix contains the connection examples to a flow computer and a list of
approvals.
1.2 Objective of the manual
This manual provides information necessary for trouble-free and safe operation.
The ENCO 08 encoder was designed and manufactured in accordance with the
state of the art and recognized safety standards and guidelines. Nevertheless,
dangers can occur during its use which can be avoided by observing these
instructions. You may only use the ENCO 08 encoder for its intended purpose and
in a technically perfect condition.
Caution
If the encoder ENCO 08 is not used for its intended purpose, all warranty
claims expire and the encoder may lose its approvals.
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1.2.1 Abbreviations
The following abbreviations are used:
ca.
circa, approximately
max.
maximum
min.
minimum
MID
Measurement Instruments Directive
1.2.2 Symbols
The following symbols are used:
1, 2, …
Marks steps within a work operation
..
1.2.3 Layout of instructions
The following instructions are used:
Danger
This warning instruction informs you of potentially hazardous situations
that can occur as a result of incorrect operation or human error. If these
situations are not avoided, they can lead to fatal or severest injuries
Caution
This warning instruction informs you of possible hazardous situations that
can occur as a result of incorrect operation or human error. If these
situations are not avoided, they can lead to slight or minor injuries.
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Notice
This warning instruction informs you of potentially hazardous situations
that can occur as a result of incorrect operation or human error. If these
situations are not avoided, they can result in material damage to the
device or the vicinity.
This notice may also give to you tips on how to simplify your work. With
this screen, you additionally receive further information on the device or
the work process.
1.2.4 Using the encoder
1.2.4.1 Safety instructions
The ENCO 08 encoder complies with current standards and regulations.
Nevertheless, operating errors can cause hazards.
Danger
Observe the following safety instructions!
Non-observance of these safety instructions can lead to a risk of life and limb and
health of the person as well as damage to the environment or property damage.
Note that the safety instructions in this operating instruction and on the device
cannot cover all possible hazardous situations as the combination of different
circumstances is impossible to predict. To simply follow the instructions specified
may not normally be sufficient enough to ensure for correct operation. Always be
observant and also consider the following:
• Before working with the device for the first time, read through this operating
instruction and, in particular, follow the safety instructions carefully.
• The operating instruction warns against the residual risks for users, third
parties, devices or other material assets. The safety instructions used refer
to residual risks that cannot be avoided due to the design.
• Operate the device only in a sound state and when observing the operating
instruction.
• Also observe the local legal accident prevention, installation and assembly
guidelines.
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Caution
All notes in the manual must be observed.
Always keep the operating instructions within reach for use at the place of
installation.
For safe operation, the safety instructions must be observed and followed.
The manufacturer is not responsible for any damage that result as a
consequence of not observing the operating instruction.
Danger
Service and maintenance work or repairs that are not described in the
operating instruction must not be carried out without previous
consultation with the manufacturer.
Changes of the Encoder ENCO 08 are forbidden.
1.2.4.2 Hazards during commissioning
Initial start up
Initial start-up must only be carried out by especially
trained personal (training by RMG) or by service personal
from RMG.
Notice
In accordance with §15 BetrSichV "Betriebssicherheitsverordnung
(industrial safety ordiance)", §5 DGUV Requirement 3 "Elektrische
Anlagen und Betriebsmittel (electrical systems and equipment)" and the
generally accepted rules of technology, especially VDE standards VDE
0100-100 "Errichten von Niederspannungsanlagen (building of low-voltage
systems)" and VDE 0165 "Electrical explosion protection", the measuring
system must be checked before commissioning the device.
Follow local or regional laws as appropriate.
An acceptance test certificate and corresponding test reports must be
prepared for this commissioning. These, the operating instructions and
the CE declaration of conformity must always be kept handy. All
documentation, including declarations of conformity and certificates,
must be checked for completeness.
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Danger
This symbol in the manual warns you of the danger of
explosion; follow the instructions next to the symbol.
Particular attention must be paid to the risk of explosion:
• Install the device TRZ03 in accordance with operating instructions. If the
TRZ03 is not installed according to the manual, there is possibly an
insufficient explosion protection.
The explosion protection expires!
• When staff carry out work without sufficient qualification, risks remain
understated when working. Explosion or fire may happen. Perform the work
only if you have the appropriate qualifications and you are an expert.
• If you do not use the appropriate tools and materials, components may be
damaged. Use tools that are recommended to you for the job in the
operating instructions.
Mechanical installation
Mechanical installation must only be carried out by the
respectively qualified specialist personnel.
Electrical installation
Installation on components must only be carried out by
qualified electricians.
Mechanical and/or
electrical installation
The specialist personnel require a training especially for
working in potentially explosive environment. Specialist
personnel are persons that can verify a training / further
education according to DIN VDE 0105, IEC 364 or a
similar national standard.
Danger
The installation of pressurized pipes must be carried out exclusively by
trained specialist personnel.
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Since the operation of the ENCO 08 encoder does not have to do directly, but only
indirectly, with pressurized pipelines, no further warnings in this respect are listed
here. If necessary, contact the operator of the plant for further information.
Notice:
• The ENCO 08 encoder may only be connected in an explosion-free,
depressured atmosphere. Observe the descriptions in the operating
instructions during the installation process.
• In general, it is recommended that an ENCO 08 encoder should only be
installed, connected or replaced by RMG Service.
• All the above points also apply to repair and maintenance work and
generally when connecting or disconnecting the ENCO 08 encoder is
required.
1.2.4.3 Danger when using, servicing and maintaining
Operating personnel
The operating personnel are to use and operate the
device within the scope of the intended purpose.
Maintenance personnel
Work on the device must only be carried out by specialist
personnel that can carry out the respective work assigned
to them as a result of their training, knowledge and
experience as well as the applicable regulations. These
specialist personnel are familiar with the legal guidelines
for accident prevention and can evaluate and avoid
possible risks by themselves.
Maintaining and cleaning
Maintenance and cleaning must only be carried out by the
respectively qualified specialist personnel.
Danger
If staff carry out work without sufficient qualification, risks may be
underestimated when working. Explosion or fire may happen. If work is
carried out in hazardous areas on voltage supporting equipment, resulting
sparks may cause an explosion.
Only carry out the work if you have the appropriate qualifications and are
a trained specialist.
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Caution
If the unit is not cleaned in accordance with the operating instructions, the
device may be damaged. Clean the unit only in accordance with the
operating instructions.
Clean with a damp cloth!
Danger
The Encoder ENCO 08 may only be used as intended!
(chapter 2 Encoder ENCO 08 and ENCO 08-M).
Avoid any use of the Encoder ENCO 08 as possible climbing aid or
attachments of Encoder ENCO 08 as possible handholds!
1.2.4.4 Qualification of personnel
Persons working with or on the device must have the following knowledge:
• Training / education for working in potentially explosive environments.
• The ability to correctly assess dangers and risks when using the ENCO 08
encoder and all connected devices. Possible hazards include components
under pressure or the consequences of incorrect installation.
• Possible dangers are, e.g., components under pressure or the result of
incorrect installation.
• Recognize dangers that could be caused by the used flow medium.
• Training / education by RMG for working with gas measuring instruments.
• Education / instruction in all country-specific standards and directives to be
observed for work that is to be carried out on the device.
1.2.5 Risk assessment and mitigation
The TRZ03 subjects to risks in its use, which were judged by qualified staff of the
company RMG. Risks can arise, for example, from work outside the permissible
temperature range. Illegal current and voltage values can cause explosions in
hazardous areas. Of course only work by trained personnel (chapter 1.2.4.4
Qualification of personnel) are permitted, which is also trained to know proper
tools and use only this.
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These risks have been considered during the development phase and action were
taken to minimize these risks.
Danger
Working in hazardous areas
For work in hazardous areas (all zones):
• Only tools approved for Ex Zone 1 may be used for maintenance and repair
work. Components can be damaged if you do not use the appropriate tool.
The explosion protection expirees
• Otherwise work may only be carried out if there is no potentially explosive
atmosphere.
• A risk of ignition caused by impact or friction must be avoided.
• In hazardous areas, the wiring and installation of the ENCO 08 encoder
may only be carried out by trained personnel in accordance with EN6007914 and in compliance with national regulations.
• Qualified personnel are persons according to DIN VDE 0105 or IEC 364 or
directly comparable standards
• Only use trained and instructed personnel. Work on the measuring system
may only be carried out by qualified persons and must be checked by
responsible specialists.
• Qualified persons have been authorized to carry out such work by the
person responsible for the safety of man and plant on the basis of their
training, experience or instruction and their knowledge of relevant
standards, regulations, accident regulations and plant conditions. It is
crucial that these persons are able to recognize and avoid possible dangers
in good time.
1.2.6 Validity of the manual
This manual describes the transmitter unit ENCO08 u. ENCO08-M. This encoder
is only a part of a complete on-site system. Observe also the instructions of other
components of the site system. If you find contradicting instructions, please
contact RMG.
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Caution
Make sure that the electrical data of the power connection correspond to
the specifications on the type plate. Care of any other applicable national
regulations in the country of use. Use cables suitable for the cable glands
(see chapter 3 Connection and commissioning)
1.2.6.1 Hazards during Operation
Please take care of the information provided by the plant manufacturer and/or
plant manager.
1.2.6.2 Danger during operation in hazardous areas
Danger
Use the encoder ENCO 08 only in the original condition.
• Only operate the encoder ENCO 08 in perfect and complete condition. If
you make technical changes to the device, safe operation can no longer be
guaranteed.
• When connecting further measuring components or additional equipment in
hazardous areas, make sure that the appropriate explosion protection is
available for these components.
• If the devices are intrinsically safe, galvanic isolation must be provided
when these devices are connected.
The encoder ENCO 08 may be operated in Ex-zone 1, but only within the
permitted temperatures (chapter 1.3 Explosion-proof design)
1.2.6.3 Operator responsibility
Take care as plant manager that only sufficiently skilled personnel will work on the
device. Ensure that all employees who handle the equipment have read and
understood these instructions. Additionally, you are obliged to train staff on a
regular basis and to inform them about any dangers. Ensure that any work carried
out on the device is done by qualified personnel and checked by responsible
specialists. You must establish clearly the responsibilities for installation,
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operation, troubleshooting, maintenance and cleaning. Point out to your staff any
risks involved when using the device.
For all work on ENCO 08, suitable personal protective equipment must be used,
which you as the operator must provide. This applies although all sharp edges
have been removed from the device as far as possible.
1.2.7 Transportation
The device is packaged customized according to the transport requirements. For
each subsequent transport, ensure safe packaging that absorbs shocks and
vibrations. Nevertheless, advise the transporter to avoid possible shocks and
vibrations during transport.
The following applies in particular during transport:
• Avoid shocks and vibrations
• Protect ENCO 08 from humidity
• In case of suspicion of improper transport or damage during transport,
please contact RMG service immediately.
1.2.8 Delivery
Supplied number of parts may differ depending on the optional customer order.
"Usually" the following is included in the scope of delivery:
Part
Quantity
Encoder ENCO 08
1
Manual
1
no CD is supplied with the integrated ENCO 08
or Encoder ENCO 08-M
1
CD (with the operating software)
1
Programming module (optional)
1 …
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1.2.9 Dispose of packaging material
Dispose the packing material in an environmentally friendly way in accordance to
the national standards.
1.2.10 Storage
Avoid long periods of storage. Check the Encoder ENCO 08 after any storage for
damage and functionality. Ask for a check from the RMG service after a storage
period for the device of over one year. In this case please send back the device to
RMG.
Nevertheless, if storage is necessary, the following must be observed:
• A dry, frost-free environment is required for storage.
• Installation and commissioning must be carried out exclusively by qualified
personnel
1.3 Explosion-proof design
1.3.1 General information
Danger
The encoder ENCO 08 may be installed in hazardous areas in zone 1, as long
as only gases and vapors are present which are assigned to explosion group
IIC and temperature class T6.
ATEX – Approval number: BVS 15 ATEX E 041 X
Indication: II 2G Ex ib IIC T6
The device complies with the regulations of Directive 94/9/EC.
The applicable regulations must always be observed during installation and
operation. The permitted electrical data can be found in chapter 3.3 Electrical
connections.
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Danger
Risk of destruction by body electricity, e.g. due to friction of clothing appropriate protective clothing must be worn.
Notice
During installation, it must be ensured that the enclosure protection class
is observed. Direct sunlight must be avoided.
The encoder housing complies with protection class IP20 due to EN 60529 and is
installed in a totalizer housing (e.g. totalizer head G) or an aluminum housing
(ENCO 08-M) with a protection class of IP66 + IP67.
Temperature ranges
MID:
-25°C to +55°C (ambient Temperature, custody transfer)
ATEX:
-40°C to +57°C (T6)
Notice
In case of doubt, the limited range of the MID applies: -25°C to +55°C
1.3.2 Junction boxes with enhanced safety
Danger
When connecting the device electrically, make sure that the power supply
is correct (see data on the type plate).
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1.4 Inspection and maintenance work
1.4.1 General information
Explosion-proof electrical control units must be regularly maintenanced. The time
intervals of this maintenance depend on the operating and environmental
conditions.
Notice
We recommend at least one check per year (e.g. in connection with the
annual calibration).
In principle, ENCO 08 is maintenance-free.
Danger
Work on live electrical equipment is generally prohibited in hazardous
areas (except for intrinsically safe circuits).
In special cases, work can also be carried out on live electrical equipment in
hazardous areas if it is ensured that no potentially explosive atmosphere is
present. This may only be done with explosion-proof, approved measuring
instruments.
Danger
If access to electrical modules is necessary, the following precautions
must be taken:
• The entire device must be disconnected from the power supply.
• When working with electronic assemblies, a connection must be
established between an earthed object and the body.
If the device is repaired regarding a part which depends on explosion protection, it
may only be put back into operation after it has been checked by a certified expert
(section 1.2.4.4 Qualification of personnel).
If repairs are carried out by RMG service, no acceptance by an expert is required.
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2 Encoder ENCO 08 and ENCO 08-M
2.1 Preface
In addition to the traditional transmission of volume information by electrical
pulses, where the number of pulses is proportional to the volume at measuring
conditions flowing through the meter, digital transmission of meter readings is
getting more and more important.
With the transmitter unit ENCO 08 (integrated transmitter unit in totalizer F and G)
and ENCO 08-M (external transmitter unit in totalizers with mechanical output
drives), it is possible to transfer the meter reading digitally to a volume corrector.
This is an energy self-sufficient encoder, which operates as a magnetic "absolute
encoder" in continuous operation without any external power supply.
The encoder ENCO 08 is used for the custody transfer of mechanical totalizer
readings (Vo) and for compliance with the legal metrological requirements with
regard to the recording of measured values.
The counter reading and all other application-specific device values are stored in
the microcontroller and cannot be lost. The meter reading is output via the
NAMUR interface (EZD protocol).
ENCO 08 is parameterized by means of an operating software (e.g. "Set meter
reading"). This is done by RMG Messtechnik upon delivery, so the customer does
not have to carry out any further parameter adjustments on site during
commissioning (exception: ENCO 08-M).
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2.2 Operation
Remark: Usually the totalizer housing is significantly smaller than the turbine
(a) gas meter (turbine)
(b) magnetic coupling
(c) MZ mechanical counter
(d) encoder ENCO 08, transmitter unit for meter reading
(e) connection for data transmission
(f) flow computer
Vo volume counter (original counter reading)
Vm volume at measurement conditions
Vn volume at standard conditions
2 x LF, HF2D, HF2D pulse generator, 1 channel [Namur, Reed]
LF Low frequency
HF High frequency
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2.3 Function
The ENCO 08 is coupled to the totalizer via a gear wheel. When the mechanical
counter rotates, the rotation is transferred to the encoder shaft in the ENCO 08.
Voltage pulses are induced in the Wiegand sensor module under the impact of the
now rotating magnetic field. These signals are evaluated in the electronic module
and converted into an electronic meter reading.
The energy required for displaying and permanent storing of the meter reading is
generated by the internal Wiegand sensors. Therefore, no external power supply
(battery) is required to record the meter reading. As soon as a converter is
connected, it also provides the necessary power supply for digital transmission
(EZD protocol) of the meter reading.
The hardware consists of Wiegand sensors with energy generation (Wiegand
sensor module), counting logic (ASIC and Hall sensor) and counter reading
archive (FRAM counter).
All application-specific parameters are stored in the EEPROM of the
microcontroller and cannot be lost.
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2.4 Variants
2.4.1 ENCO 08
Integrated in the totalizer head type F (for TRZ 03, TRZ 03-K)
Integrated in the totalizer head type G (for TRZ 04, TRZ 04-K and DKZ 02)
Encoder ENCO 08
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2.4.2 ENCO 08-M
External encoder for mounting on mechanical counters with mechanical output
according to EN12261.
This version requires on-site parameterization, unless the ENCO08-M is already
mounted and sealed in a totalizer head with mechanical output.
The ENCO 08-M is parameterized with its specific data (such as meter reading,
number of decimals and direction of rotation) by means of a PC operating program
to the meter type to which it is attached.
With the ENCO 08 firmware (1.11 and 1.12), turbine and rotary displacement
meters can be operated with the following combinations of output value (Ua) and
number of decimals (NKS – Nachkommastellen, German):
Coupling for output shaft
Coupling connection
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U
a
= … m³, (Specification on mechanical output)
NKS
0.01
0.1 1 10
100
3
1.12 - - - -
2
1.12
1.11
1.12
- - -
1
-
1.12
1.11
1.12
-
-
0
- - 1.12
1.11
1.12
-
x10
- - -
1.12
1.11
1.12
1.11: Standard for ENCO08 / ENCO08-M for 8-digit counters
1.12: ENCO08-M with special output ratio and 9-digit counters
1.12: ENCO08-M with special output ratio and 8- and 9-digit counters
Note
Important
The output values must be specified when ordering. If these values are not
available, the ENCO08-M is set to the default values:
• Ua = 0,1m³
• NKS = 1
• SW = 1.12
• Direction of rotation = clockwise
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2.5 Use in custody transfer applications
This chapter contains information on how you can upgrade the ENCO08-M for
custody transfer and ensure its use here. For this purpose, seals are attached at
various points of the ENCO08-M and the housing is sealed to prevent opening.
Caution
The ENCO08-M is approved for custody transfer. It is sealed before delivery
and certain settings are locked by the approval authority.
These seals must not be damaged, destroyed or removed!
In this case, the ENCO 08 loses the calibration certification!
The ENCO 08 can only be re-certified for the in custody transfer applications
by an officially approved certification lab or an calibration official and an
additional check of the settings. The calibration officer must reattach the
seals after his verification and calibration.
The re-equipping for custody transfer is usually associated with costs
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2.5.1 Sealing plan
2.5.1.1 Type plate
Notice
The modification of parameters or the software (of the internal firmware) is
only possible after a seal break and by using a PC and a programming
module.
Caution
If the software version is replaced, the type plate must be replaced, too.
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2.5.1.2 Seals on the housing
In the following figures, the positions at the encoder ENCO 08 are marked that
must be sealed to prevent opening.
The digital, custody transfer of the Vo to a transmitter device is in accordance to
DIN 19234 respectively NAMUR. This is unidirectional and interaction-free.
Notice
The cable between the ENCO08-M and the transmitter device must be
sealed.
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2.5.1.3 Coupling for the output shaft
Notice
The mechanical output of the ENCO08-M must be sealed, too.
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3 Connection and commissioning
3.1 General
When selecting the cable, make sure that the permitted maximal values are taken
into account according to the EC type examination certificate.
The electrical Ex network must be realized with its own cable. Only a shielded
cable may be used for the installation of the encoder; we recommend the cable
LIYCY 2 x 0.75 mm2, sheath color blue.
The cable screen is connected on both sides. The shield is grounded on the nonhazardous supply side. At the other end of the cable, the shield is connected on
the insulated metal housing of ENCO 08. The housing of ENCO 08 may also be
earthed in potentially hazardous area, observing the regulations according to DIN
EN 60079-14. The meter housings of turbine gas meters and rotary displacement
meters as well as the aluminum housing of the ENCO 08-M must be earthed.
A stable installation of the intrinsically safe cables is absolutely necessary. The
connection cables must be equipped with wire end ferrules.
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3.2 Electrical Data
Label: Type: ENCO 08
Voltage Ui: 13,5 V
Current Ii: 15 mA
Power Pi: 51 mW
Ci: neglectable
Li: neglectable
The device complies with the following regulations and standards:
➢ ATEX guideline: 2014/34/EU
➢ EN 60079-0
➢ EN 60079-11
➢ EN 60079-14
➢ EMV guideline: 2014/30/EU
➢ OIML R137-1&2
➢ OIML D11
➢ Digital interface for primary devices with transmission of the meter
readings
➢ EN 60947-5-6
The applicable regulations and directives must always be observed during
installation and operation.
3 Connection and commissioning
Manual ENCO 08-M · EN05 · 2018, September 10th
26
3.3 Electrical connections
ENCO 08
Contact
1
Vo +
2
-
3
Vo -
4
PE
The connection of the digital signal Vo is realized via the sockets 1 and 3.
1
2
3
4
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Manual ENCO 08-M · EN05 · 2018, September 10th
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3.4 Data protocol
The electronically recorded totalizer reading is transmitted in a data protocol
"Digital interface for primary devices with meter reading transmission" in specified
time intervals.
A two-wire interface according to EN 60947-5-6 (NAMUR threshold level
specification) serves as the hardware layer for power supply during the data
transmission.
The additional bidirectional interfaces on the ENCO 08 are only available in the
service mode and enable operation, parameterization and flashing of the firmware
in the factory or during maintenance work on site.
Danger
Intrinsic safe operation is not guaranteed during the use of these
interfaces!
It must be ensured that no hazardous area is created during maintenance work!
A connection example to the ERZ2000-NG can be found in the appendix:
Appendix A: connection example
3 Connection and commissioning
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3.5 Putting into operation
3.5.1 ENCO 08
This version (integrated in totalizer heads F and G) does not require a local
parameterization. The ENCO 08 is preset to the meter type with its specific data,
tested and sealed at the RMG factory by the certified test lab using the user
software.
During commissioning on site, only the connection (see connection examples)
between ENCO 08 and the connected readout device must be established. The
connection for the encoder is located on the back of the totalizer head (a plug from
the company Binder of the series 713: 1 = Vo + // 3 = Vo -).
3.5.2 ENCO 08-M
This version (external encoder) requires local parameterization. The ENCO 08-M
must be parameterized to its specific data for the meter type to which it is attached
(such as meter reading, decimal digits and direction of rotation) by means of the
user software. This separate manual "ENCO 08 - Programming Manual" can be
found in the help menu of the "ENCO08 PC Software". Here you will also find a
short manual for this "ENCO08 PC Software".
The ENCO 08-M can be used without restriction on all RMG turbine meters and
rotary displacement meters with mechanical output. The ENCO08-M can also be
3 Connection and commissioning
Manual ENCO 08-M · EN05 · 2018, September 10th
29
mounted on all manufacturer-independent turbine and rotary displacement gas
meters with mechanical output and a maximum of 9-digit roller counter, whereby
for 8 rollers, the last scale division corresponds to the 9th digit.
The ENCO 08 programming module and the PC-ENCO user program (software)
are required for parameter setting. This separate quick guide can be found in the
help menu of the "ENCO08 PC Software".
When putting into operation on site, the connection (see connection examples)
between ENCO 08-M and the connected readout device must still be established
after the programming has been completed. On the housing side there is the
connection for the encoder (plug from the company Binder of series 713).
3 Connection and commissioning
Manual ENCO 08-M · EN05 · 2018, September 10th
30
3.5.3 Connecting the gas flow
Please observe the operating instructions of the gas meter! The following applies
to RMG turbine meters:
Caution
Do not operate any downstream pipelines or system components through
the turbine meter. Turbine rotation can occur that may lead to excessive
stress or overload and cause damage.
A short overload of 20% above the maximum flow rate Q
max
is permitted. In case
of a smooth backflow, no damage occurs.
Appendix
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Appendix
Appendix A: connection example
Connection scheme to the flow computer ERZ 2000(-NG; -Di, ..)
When using the internal Ex separating stage, terminals X9 are assigned on the
ERZ:
When used without internal Ex separating stage, terminals X4 are assigned on the
ERZ:
Appendix
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32
Appendix B: certificates / standards
ENCO 08 (-M) has the following approvals, which are listed below:
- Type examination certificate
Metrologic approval
− Certificate of Conformity according OIML R137-1 (2012), EN12261: + A1,
EN12480 + A1 (NMI: CoC-15200211-01)
Ex-approval
− ATEX according EN60079-11, EN60079-0 + A11 (BVS 15 ATEX E 041 X)
− Labeling: II 2G Ex ib IIC T6
- EU-Declaration of Conformity
- Declaration of Conformity due to MessEG
Appendix
Manual ENCO 08-M · EN05 · 2018, September 10th
33
Kontakt
Manual ENCO 08-M · EN05 · 2018, September 10th
Subject to technical modification
For further information
please visit our website:
www.rmg.com
or contact your local sales support office
to learn more about the RMG products.
RMG Messtechnik GmbH
Otto-Hahn-Straße 5
35510 Butzbach, Deutschland
Tel: +49 (0) 6033 897 – 0
Fax: +49 (0) 6033 897 – 130
Email: service@rmg.com
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