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Summary of Contents for Secure Liberty EG4v12
- Page 1 Liberty EG4v12 (G1.6) gas meter User cum maintenance guide BGX701-240-R01...
- Page 2 Secure Meters Ltd. Other product names are trademarks or registered trade names of their respective owners. As part of Secure Meters’ continuous endeavours to improve its products, specifications mentioned are liable to change. Page 2 of 32...
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Page 3: Table Of Contents
Installation, maintenance and environment ........................5 2 Product overview and operating principle .................. 7 3 Product description ........................8 Liberty EG4v12 main features ..............................8 3.1.1 Electronic unit (EU) ..............................9 3.1.2 Battery .................................... - Page 4 5.11 Communication channels ................................23 6 Maintenance ..........................24 Replacing the battery in the Liberty EG4v12 gas meter ....................24 Replacing Liberty EG4v12 gas meter............................26 7 Working with the mobile app ..................... 27 ...
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Page 5: 1 Introduction
This document is intended for technical users, utilities and fully qualified, registered installers of Liberty EG4v12 meters. About this manual The manual describes functions and features of the Liberty EG4v12 meter and provides necessary information needed to use the meter. Important safety information Attention is drawn as follows in the individual chapters of this user manual with classified word symbols and pictographs to the relevant danger level, i.e. - Page 6 The primary battery in the meter can be replaced by authorised personnel, when in service. However, this battery must only be supplied by Secure Meters Ltd. You may contact the sales team representative at Secure Meters Limited for further information. When replacing the gas meter battery, ensure that you follow appropriate Electrostatic discharge (ESD) procedures before you open the meter cover.
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Page 7: 2 Product Overview And Operating Principle
Product overview and operating principle Liberty EG4v12 supports Prepayment mode of operation. The meter is based on a positive displacement principle. It has a well-defined measurement compartment that alternately fill and empty when gas is consumed. By knowing the volume displaced in each cycle and by applying proper gear ratio, the meter will read the gas consumption in cubic meters. -
Page 8: 3 Product Description
The integrity of the meter seals should be checked periodically. LCD information window (Display) Liberty EG4v12 has a backlit, monochrome LCD for displaying metering data, alerts and other relevant information. The meter is battery-powered, and therefore the display is enabled only on demand (key press). -
Page 9: Electronic Unit (Eu)
side, at the front. Provision is also made for front/battery cover ‘open’ detection. Removal of the cover and access to the battery compartment requires breaking the plastic seals and undoing the screws. 3.1.1 Electronic unit (EU) The electronic unit (EU) is fitted on the front of the mechanical gas meter using mounting studs. The enclosure has an ingress rating of IP-54. -
Page 10: Display Icons
Only a few icons as described in section 3.2.1 are applicable for Liberty EG4v12 gas meter. The meter is programmed to display information on manually pressing any numeric key on the meter keypad. Sets of information relating to a function are grouped on each numeric key. Repeated pressing of the same key manually jumps the display through the configured display list. -
Page 11: Financial Display
3.2.3 Financial display All financial information will be displayed in Rupees and Paisa. Most numerical displays use the decimal points predefined in the display graphics, as shown below: 3.2.4 Display timing Display timings are preconfigured for each data item in a display sequence with each item being preceded by a relevant title. -
Page 12: 4 Meter Specifications
12 o’clock and 6 o’clock at 3 o’clock and 9 o’clock from normal to window Metrology BS EN 1359 Compliance Fire resistant EN1359 (pressed steel version) Cyclic volume 1.2dm (Liberty EG4v12) Qmax 2.5 m Flow range Qmin 0.016 m Metrology Starting flow rate 3.0 dm... -
Page 13: Handling, Storage And Operating Conditions
Ideally, the meter should be stored and operated in a dry, well ventilated, climate-controlled building. Rapid changes in temperature and humidity should be avoided. Liberty EG4v12 dimensions The following diagram shows the outer dimensions of the Liberty EG4v12. All dimensions are in millimetres (mm): Figure 5: Liberty EG4v12 front and side views... -
Page 14: 5 Functional Specification
Communication channels 10. Meter reading data 11. Engineering Codes Meter operating modes Liberty EG4v12 meter operates in pre-payment mode. Also, there is a commissioning mode for commissioning of the meter. 5.1.1 Prepayment mode In Prepayment mode, the meter will perform billing actions as detailed in ’Device information Device information consists of the meter serial number, meter program name, commodity type and the meter type. -
Page 15: Registers And Snapshots
entire commissioning process, including the gas test but excluding gas meter installation, should take less than ten (10) minutes. Note: Once the commissioning is carried out successfully, standing charge deduction becomes applicable. Registers and snapshots 5.2.1 Registers The gas meter EU records the volume of gas consumed in m Measurement and recording of the gas flow The gas meter EU is designed to receive pulses from its gas meter. -
Page 16: Timekeeping
5.4.1 Standing charge deduction Liberty EG4v12 meter can be configured at the factory end to deduct a specified amount of standing charge from its current account and Emergency Credit account (if applicable); this deduction takes place in one of the following two ways:... -
Page 17: Accounting Zones In Prepayment Mode
To stop the deduction of standing charges in the meter, a Retain credit transaction needs to be performed. 5.4.2 Accounting zones in prepayment mode Liberty EG4v12 meters operating in Prepayment mode will have the following four accounting zones: ● Credit zone ● Low credit zone ●... -
Page 18: Emergency Credit (Ec)
5.4.3 Emergency credit (EC) Liberty EG4v12 operating in Prepayment mode supports Emergency Credit functionality which if enabled will prevent immediate supply disconnection when the meter account becomes zero or negative. Emergency Credit is made available to users when their meter account passes the Low Credit threshold. A visual indication on the meter’s display will indicate the availability of Emergency Credit. -
Page 19: Friendly Credit(Fc)
Users can also enable Emergency Credit (if not already exhausted) after supply disconnection by pressing Key 7. If the meter is running in EC, the mobile app will show account status as follows: Account’s current balance Account’s current status Figure 7: Account status on mobile app IF EC is not availed, the mobile app will show ‘low money’. -
Page 20: Retain Credit
● Credit addition (recharge through vend) Account-based prepay alerts Liberty EG4v12 meters operating in prepayment mode displays visual alerts (see Figure 6 ) under the following circumstances based on the state of its account: ● ‘Low credit’ alert if the credit level in the meter’s account reaches or passes below the configured low credit threshold. -
Page 21: Meter Valve State
● ‘Low emergency credit’ alert if an emergency credit level in the meter reaches or passes below the configured low emergency credit threshold. ● ‘Emergency credit exhausted’ alert if there is no emergency credit left in the meter Meter valve state The supply valve has three states –... -
Page 22: 5.10 Detecting Events
The occurrence of hardware events in the meter, such as a low battery or battery failure or valve failure or RTC failure is logged as diagnostic flags. 5.10.2 Tamper events Liberty EG4v12 can be configured to disconnect the supply when it detects a tamper event. The meter is programmed to record the following as tamper events: ... -
Page 23: 5.10.3 Prepayment Events
Persistence and restoration of excessive flow of gas Tilt of 45 degrees and tilt restoration If the valve is closed due to any of one of the above events, then the restoration of such event resets the tamper flag and drives the gas valve to its READY state from where a user can reconnect their supply by using the meter keypad to acknowledge the displayed message. -
Page 24: 6 Maintenance
Under no circumstances should the battery be changed if gas leakage is observed. Replacing the battery in the Liberty EG4v12 gas meter The gas meter battery is designed to last for at least ten years under regular use and operating conditions. - Page 25 Attention The battery can only be replaced by a type and manufacturer approved and recommended by Secure Meters, fitting an unapproved battery will be in breach of the regulations set out by the ATEX directive and will invalidate the products warranty. The primary battery must only be of any one of the following types: ...
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Page 26: Replacing Liberty Eg4V12 Gas Meter
Replacement batteries and seals can be ordered through Secure Meters Limited. Secure part number Description BGX101-630 EVE or Vitzrocell battery BGX101-542 Tadiran or Xeno battery BGX201-190 Plastic battery cover seal (press‐fitted seals, 2 per battery cover) BFF131-019 M4 battery cover brass nut (optional) should not be needed unless they are... -
Page 27: 7 Working With The Mobile App
Working with the mobile app The Sahaj mobile app is available on Google Play store. The supported android and Bluetooth versions to run the app are: Android version: 6.0 to 9.0 Bluetooth version: 4.2 to 5.0 Download the app from the store and follow the instructions to launch it. Logging-in Following are the steps to log in to the mobile app: Figure 8: Logging-in... -
Page 28: Connecting The Device
Connecting the device Communication between the mobile app and meter will be done via Bluetooth. Figure 9: Connecting device via Bluetooth On the My connection page, click the Connect button. The app establishes a connection via Bluetooth with the metering device and acquires information like balance amount, estimated days left etc. Recharge options Recharge can be performed in both Offline and Online modes. -
Page 29: Saving A Purchased Token
Figure 5: Meter display in ‘Test Mode’ ......................10 Figure 6: Liberty EG4v12 front and side views ....................13 Figure 7: Liberty EG4v12 accounting zones in prepayment mode ..............17 Figure 8: Account status on mobile app ......................19 ... -
Page 30: 8 Glossary
Credit period. This feature allows users to top-up their meter account or enable Emergency Credit in the meter to prevent sudden supply disconnection. Head End System Liberty EG4v12 Smart gas meter with a display and a keypad. Local disconnection Self-disconnection of meter’s supply switch due to load limit or no credit reasons. -
Page 31: 9 Notes
9 Notes... - Page 32 www.securemeters.com BGX7 0 1 - 2 4 0...
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