Elster® enCore ZM1 Flow Computers
Overview
The Honeywell Elster enCore ZM1 flow computer is a latest-generation device, engineered for accurate gas volume measurement, flow calculation, and data registration in custody transfer and distribution metering applications. Its modular process card system enables flexible configuration and future-proof expandability as metering requirements evolve.
In addition to the common k-number calculation methods, the ZM1 implements functions in accordance with DVGW worksheet G 485 and supports the DSfG protocol, the established digital interface for gas measuring devices in European and international gas networks. The integrated registration stores interval and event-oriented measured values, meter readings, and alarm records, forming a real-time load profile for billing and network analysis.
Engineering & Design
The enCore ZM1 is built around a modular architecture where process interface cards handle different input types, allowing the device to be adapted to the specific metering station configuration. This modularity simplifies maintenance, reduces spare part complexity, and allows the flow computer to grow with the station without replacement of the complete unit.
Data communication via DSfG is integrated as standard, and the device can transmit registered data wirelessly using GPRS or GSM through UMM cellular routers. The registration database is designed for long-term storage of interval and event records, supporting both online retrieval and local archiving for verification and audit purposes.
Key Features
- Latest generation flow computer for gas measurement
- Modular process card system for flexible configuration
- Common k-number calculation methods supported
- Functions per DVGW worksheet G 485
- Integrated DSfG communication protocol
- Interval and event-oriented data registration
- Real-time load profile (meter reading profile) creation
- GPRS or GSM transmission via UMM cellular routers
- Future-proof expandability
Applications
- Custody transfer gas metering stations
- Distribution and industrial gas measurement
- Volume correction for billing purposes
- Load profile and consumption data registration
- Gas network monitoring and telemetry
- Integration into existing DSfG-based metering infrastructures
Specifications
| Specification | Value |
|---|---|
| Manufacturer | Honeywell / Elster |
| Model | enCore ZM1 |
| Type | Flow computer / volume corrector |
| Architecture | Modular process card system |
| Calculation Methods | Common k-number methods, DVGW G 485 |
| Communication | DSfG (integrated), GPRS/GSM via UMM routers |
| Registration | Interval and event-oriented values, meter readings |
| Data Output | Real-time load profile (meter reading profile) |
| Expandability | Future-proof modular upgrades |
Accurate gas measurement is the foundation of fair billing and efficient network operation, and the Honeywell Elster enCore ZM1 Flow Computer is engineered to deliver that accuracy in custody transfer service. Its modular process card architecture means the same platform can serve a simple volume corrector duty today and be expanded for multi-stream fiscal metering tomorrow.
For gas metering projects, the Elster enCore ZM1 Flow Computer is a proven platform. Seven Star LLC supplies the ZM1 with configuration support, matching each unit to its metering station duty.
The Elster enCore ZM1 flow computer is the modern gas flow computer of the metering station, and the Elster enCore ZM1 flow computer calculates the corrected volume with the standard algorithms for the custody transfer.
Why Seven Star LLC
Seven Star LLC supplies the Honeywell Elster enCore ZM1 flow computer for gas metering projects in the Gulf region, backed by our experience with fiscal and distribution metering systems. We provide the unit with full documentation and support for configuration planning and DSfG integration.
Our team assists with metering station design, spare part identification, and replacement programmes for existing Elster and Honeywell flow computing equipment.
Data Integrity & Communication
The enCore ZM1 registers interval and event-oriented data in a structured database, preserving the meter reading profile required for load profile analysis and settlement. The integrated DSfG interface allows direct communication with gas quality analysers and other field devices, and GPRS or GSM transmission via UMM cellular routers supports remote data collection without site visits.
Compliance with DVGW worksheet G 485 functions and support for common k-number methods ensures the device meets the calculation standards expected in European and international gas networks.
Configuring the ZM1 for Your Station
Because the enCore ZM1 uses a modular process card system, the first step is to map the station inputs: gas meter pulse or encoder signals, pressure and temperature transmitters, and any gas quality data from a chromatograph. From that list the required process cards, communication options and calculation method can be defined. Confirm which k-number or compressibility method your gas contract or national regulations require, and whether the station must communicate over DSfG, cellular links or both.
Installation and Commissioning
Flow computers are usually installed in a safe-area cabinet or control building, with intrinsically safe barriers or isolators for field signals coming from the hazardous area. Keep signal and power wiring segregated, earth the cabinet correctly, and label every input to match the configuration file. During commissioning, check each input against a reference source, verify the calculation with a test data set, and confirm that interval and event records are being stored and can be retrieved by the SCADA or billing system.
Metrology and Maintenance
For custody transfer, any change to parameters that affect billing should follow the station’s sealing and verification procedures. Routine maintenance covers periodic verification of the connected transmitters, checks of the stored archives, and review of alarm and event logs for recurring faults such as input failures or communication dropouts. Because process cards can be exchanged individually, keeping a small set of critical spare cards reduces station downtime.
Troubleshooting Tips
- Volume totals not incrementing: check the meter pulse input and card status.
- Corrected volume out of line with expectations: verify pressure, temperature and gas quality inputs.
- Data gaps at the central system: check cellular signal, router status and DSfG bus wiring.
Applications in Oman and the GCC
The Elster enCore ZM1 flow computer fits gas distribution offtakes, industrial customer metering, pressure reduction and metering stations, and power plant fuel gas metering where reliable registration of billing data is required.
Sourcing from Seven Star LLC
Seven Star LLC supplies Elster gas metering electronics and spare process cards to operators in Oman and the GCC. Send the existing device configuration or station input list and we will confirm the matching hardware.
Request a Quote for Elster® enCore ZM1 Flow Computers
For the Elster enCore ZM1 Flow Computer, gas flow computer or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your required quantity and specification, and our specialists will respond with a detailed commercial proposal and the relevant Elster documentation.
Related Products
Elster product families listed here
The Elster flow meter on this page is the Q.Sonic plus, a multipath ultrasonic gas meter for custody transfer measurement, listed together with a USM display unit. Flow computers come from two device series. The enCore series is represented by the enCore FC1 and the enCore ZM1. The gas-net series is represented by the gas-net F1 flow computer and the gas-net D2, a data forwarding unit for the DSfG station interface used in German-standard gas metering systems.Where Elster gas metering equipment is used
Elster gas meters and flow computers work at transmission and distribution metering stations, city gate and pressure reduction stations, power plant and industrial fuel gas inlets, and gas storage sites. The flow computer converts measured volume to base conditions using pressure, temperature and gas quality data, records the fiscal archives and passes data to the SCADA system. Operators in the GCC meet this equipment mainly on fiscal and allocation metering skids.Ordering Elster meters and flow computers: what we need
For an ultrasonic meter: nominal size, pressure rating and flange standard, flow range, gas composition, operating pressure and temperature, the metrological approval required and the flow calibration expected. For a flow computer: device type, the serial number and software version of the existing unit, the I/O boards fitted, the meters and transmitters connected, the conversion and compressibility method (for example AGA 8) and the communication protocols. A photo of the type plate and the parameter printout shorten the check against the manufacturer's documentation considerably.Browse Elster products by category: Flow Computers, Flowmeters, Industrial Communications.
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