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Ek220 en03, 20/02/2012


Volume conversion device with fl exible data logging function and confi gurable serial interface - Volume conversion for billing purposes • T, PT, PTZ volume conversion - Data logging for different applications • Conforms to European standard - Monitoring of measurement values und station functions Brief information • Compressibility calculated The EK220 is a battery-operated volume convertor. The device records the low frequency in accordance with different methods operating volume pulses of a gas meter, measures the operating pressure and tempera-ture of the gas and calculates the compressibility K as well as the conversion factor C. The • Flexible, integrated data logging standard volumes, standard fl ow rates and operating fl ow rates can be calculated using this initial data.
• High accuracy The volume convertor consists of a central unit with either an integrated or external pres- • Mains-free operation sure sensor and a temperature sensor. The sensors are permanently connected to the • Suitable for use in unit. The compressibility K can be programmed as a constant for all gases or calculated Zone 1 hazardous areas according to various methods of calculation.
• Three digital inputs The device is also available without a pressure sensor and can be used as a temperature • Four freely programmable outputs conversion device. In this case the gas pressure for the volume conversion will be consid- • - IEC 62056-21 ered with a fi xed value, which has to be confi gured during the commission of the device.
The EK220 can be used in many applications in the fi eld of natural gas measurement and station monitoring thanks to four digital outputs, a fl exible data logging function in con- • Optical interface for parameterisation junction with a freely confi gurable serial interface and different communication protocols.
and readout (IEC 62056-21) • Integrated serial interface can be used Additional components for explosion-proof isolation of the interfaces and the intrinsically as RS232 or RS422/RS485 safe external voltage supply, and for data communication, extend the range of use of the volume convertor.
• Second pressure sensor for monitoring purposes (option) Station monitoringIn addition to volume conversion and data logging, the EK220 may be used for the fl ex-ible data recording of different measurements and, in conjunction with either a modem or RTU, for system monitoring.
Two additional digital inputs can be used for registering and monitoring the signal sen-sors such as the safety shut-off valves on regulators, the differential pressure switches in fi lters or for a simple door contact. The signals from such sensors can be saved in an archive as an event and can also be sent as a spontaneous message by text message or by e-mail via a connected modem.
The volume convertor may optionally be fi tted with a second external pressure sensor, which allows to record the inlet or outlet pressure of the measuring system, or to monitor its limit values.
EK220: Volume conversion device with flexible data logging function and configurable serial interface Display and operation components. In RS485 mode, bus opera- puts, they allow forwarding of the volume tion is also possible, in order to read out pulses determined for a measuring cycle in The current values and parameters can be two volume convertors via a communica- the form of pulse packets. When used as shown on the two-line, alpha-numerical tion module (modem, RTU). In compliance status outputs, messages and warnings display and changed if required. The use of with the specifi cations laid out in the ATEX can be signalled on the basis of different four arrow keys guarantees simple naviga- approval, the interface may also be used in results (e.g. exceeding the minimum or tion of data arranged in lists. Each value is hazardous areas in any confi guration.
maximum consumption values or meas- displayed with a clear description and the ured values, sensor errors, time synchroni- relevant unit.
sation signals, etc.). The outputs can either Communication protocols be secured against unauthorised changes For everyday operation, the most impor- by supplier lock or calibration lock.
tant values are combined in a confi gurable The EK220 supports various communica- user list. The display range can be limited tion protocols. Invoice-relevant data or The volume convertor may also optionally to this list, which will guarantee simple op- process and operating data for network be fi tted with a second pressure sensor. eration of the volume convertor at the me- management can therefore be used si- Depending on the system confi guration, tering point. At the touch of a few buttons, multaneously in many established central the measuring system's inlet or outlet pres- the current meter readings and the main call-up systems and EDM systems.
sure can thus be registered in one of the operating parameters can be checked.
fl exible archives and the limit values can Using the communication protocol in ac- also be monitored there. The system's sta- cordance with IEC 62056-21, all param- tus can also be continuously monitored Data logging function eters can be read and changed and the when it is connected to a SCADA system.
archives can be read out. All protocol in- The integrated, event-triggered data log- formation is disclosed and is available on ger supports different archive and logbook request for the development of own appli- cations and call-up systems.
The power supply for the unit is provided Six archives can be freely confi gured, i.e. As an alternative to the protocol in accord- by a lithium battery. In standard operation, the values that are to be recorded, the ance with IEC 62056-21, the Modbus proto- the service life of the battery is 5 years. An events triggering registration, as well as col can also be used for data communica- optional additional battery can be used to the recording interval (measuring period), tion via the internal interface, which allows double the battery life. The current operat- can be selected as required. Depending connection to SCADA systems. For using ing status of the volume convertor is taken on an archive's confi guration, the data can the Modbus protocol the operating modes into account when calculating the remain- be saved for up to one year, or longer.
ASCII, RTU and TCP are supported.
ing battery capacity. If the battery life is 3 months or less, the corresponding indica- Along with the data logging archives, the In order to guarantee the greatest fl exibility tion appears in the display. In addition, this volume convertor offers three logbooks, as regards different requirements and ap- information can also be called up via the with which the volume convertor's opera- plications, the data elements, associated volume convertor status register. The bat- tion can be monitored constantly. The event Modbus addresses and data formats can tery can be replaced without damaging the logbook saves the last 500 messages for thus be freely confi gured.
internal seals. All parameters are saved in events and status changes. In the change a non-volatile memory.
logbook the last 200 setting changes are In addition to the process data and simple registered and up to 50 changes to pa- parameter, also the content of the different In addition, it is also possible to use an ex- rameters and values requiring offi cial cali- archives can be read by using the Modbus ternal power supply. In this case, the bat- bration are documented in the calibration tery remains in the unit and guarantees the archive (Certifi cation data log).
unit functions, including if there is a failure of the external power source.
Additional functions Communication interface Two additional digital inputs can be used The programming or readout of the device either as pulse inputs or status inputs for at the station is performed via the optical various applications, such as station moni- For wall mounting, the housing of the interface (IEC 62056-21) on the front panel.
toring and pulse comparisons, for exam- EK220 is equipped with boreholes. It can also be fi tted directly to the meter or gas The unit's serial interface can be freely con- pipe using an attachment bracket.
fi gured and can be operated in RS232 or Four freely programmable digital outputs RS422/RS485 mode. It allows connection enable a range of information to be trans- to modems and other communication mitted. When programmed as pulse out-




Product data sheet Second pressure sensor for station monitoring (option) - Connection to 2nd p-sensor - Recording in the archive(s) (confi gurable) - Supervision of limits (event handling) via- GPRS (TCP/IP)- Direct connection- Ethernet (TCP/IP)- RTU Flexible data logging and logbook function Standard confi guration Date, time, Vb, VbT, MPmaxVb, dailymaxVb, Vm, VmT, MPmaxVm, dailymaxVm Date, time, Qmmin, Qbmin, Qmmax, Qbmax, pmax, pmin, pØ, Tmax, Tmin, TØ, k-value Ø Date, time, Vb, VbT, Vm, VmT, pØ, TØ, k value Ø, C factor Ø, status Date, time, Vb, VbT, Vm, VmT, pØ, TØ, k value Ø, C factor Ø, status 1 minute - 1 month Date, time, Vb, VbT, Vm, VmT, pØ, TØ, k value Ø, C factor Ø, status 1 minute - 1 month *3 Date, time, Vb, VbT, Vm, VmT, pØ, TØ, k value Ø, C factor Ø, status 1 minute - 1 hour *3 1 minute - 1 month *3 Date, time, event Date, time, parameter address, old value, new value, information on all locks Certifi cation data log Date, time, parameter address, old value, new value, information on all locks (every change) *4 *1 depends on confi guration of archive (interval, content)*2 by using the standard confi guration*3 besides periodic recording specifi c events can be selected to trigger recording*4 records only the changes of certain parameters, which are under the access right of the calibration lock (function can be switched off) FE260 function extension unit – a fl exible interface between EK220 and energy data management in hazardous area - Volume conversion - Ex-barrier data interface - Ex-barrier digital outputs - Modem (PSTN, GSM, GPRS, etc.) - Intrinsically safe power supply for EK230 The Ex-barrier of the serial interface and In addition, the intrinsically safe power sup- of a modem for data communication or an the pulse outputs of the volume convertor is ply of the volume convertor is guaranteed. interface for connection to other devices.
provided by function extension unit FE260. The unit's modular concept allows the use EK220: Volume conversion device with flexible data logging function and configurable serial interface Cast aluminium, wall or meter mounting H 126 mm x W 120 mm x D 90 mm (not including connections) Approx. 1.5 kg (including batteries) Metrological approval Conforms to the European standard EN 12405-1:2005 +A1:2006MID DE 08-MI 002-PTB 001 volume conversion device (PTZ-conversion)MID DE 08-MI 002-PTB 002 temperature volume conversion device (T-conversion) Ex Certifi cation ATEX Zone 1, Ex ia [ia] IIC T4 (with Elster battery type 73015774) orIEC Ex Zone 1, Ex ia [ia] IIC T4 (with Elster battery type 73020663) IP 66 (suitable for outdoor installation) Ambient conditions Temperature: -25 to +55 °C Battery power supply 1 lithium battery 3.6 V, size D (service life > 5 years under standard operating conditions)Optional additional battery to double the service life External power supply 5 – 10 V DC, I < 30 mA mains power supply unit (in conjunction with a serial interface) Keypad with 4 buttons 2-line dot-matrix display with plain-text description of the values displayed.
All parameters, settings and archived values can be displayed.
3 digital inputs for connecting LF pulse generators and message signals (e.g. manipulation contact) Absolute sensor, Type ENVEC CT30*, integrated in housing or, as an option, provided as an external sensor for volume conversion (if two pressure sensors will be used, then one as internal and one as external version), connection for precision steel pipe (Ermeto 6L) or fl exible pressure tube, M12 x 1.5 threadPressure ranges 0.7 – 2 bar / 0.8 – 5 bar / 1.4 – 7 bar / 2 – 10 bar / 2.4 – 12 bar / 4 – 20 bar / 6 – 30 bar / 8 – 40 bar / 14 – 70 bar / 16 – 80 bar * Other sensors and pressure ranges on request Absolute or gauge sensor, Type ENVEC CT30, provided as an external sensor, for monitoring purposes fi xed connection to the central unit, 10 metres fi xed cable length connection for precision steel pipe (Ermeto 6L) or fl exible pressure tube, M12 x 1.5 threadAbsolute pressure ranges between 0.7 – 80 bar (see above)Gauge pressure ranges: 1.4 – 7 bar / 4 – 20 bar / 16 – 80 bar Temperature sensor Pt-500 (or Pt-100 as an option) resistance thermometer to DIN 60751 with protective tube, for use with thermowell.
- Fitting length 50 mm Ø 6 mm, length of supply cable 2.5 m Calculation in accordance with S-GERG 88, AGA 8 detailed, AGA 8 (GC1 or GC2), AGA NX-19, AGA-NX19 following Herning & Wolowsky or fi xed 2 monthly archives, 1 daily archive, 1 measurement archive (content and recording interval are fi xed)1 process data archive, 1 measurement archive, 4 additional fl exible archives (content, recording interval and additional events which cause a record can be selected) - Recording of non-periodic events (e.g. time changes with time stamp) - Storage capacity 500 recordsChange logbook (audit trail) - Recording of all parameter and value changes (time stamp, old and new values) - Storage capacity 200 recordsCertifi cation data log - Recording of changes of certain parameters and values (time stamp, old and new values), which are normally under the access rights of the calibration lock - Storage capacity 50 records 4 digital transistor outputs, freely programmable and protectable via calibration lock as - Pulse output for all operating or standard volume meters - Signal output for alarm and/or warning status information Optical interface in accordance with IEC 62056-21Internal serial interface usable as RS232 or RS422/RS485 Communication protocols - IEC 62056 21 (IEC 1107) - Modbus Modbus ASCII / RTU / TCP - SMSOther communication protocols on request Elster-Instromet Sdn. Bhd. (Singapore Branch) Steinern Str. 19 - 21 29 Tai Seng Avenue 55252 Mainz-Kastel #06-05A Natural Cool Lifestyle Hub T +49 6134 605 0 T +32 3 670 0700 F +49 6134 605 223 F +32 3 667 6940 Vital Connections Copyright 2012 Elster GmbH All rights reserved. Subject to change without prior notice

Source: http://www.fagas.ba/img/site/files/DS_EK220_EN.pdf

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