Elster's EK280 is a compact, battery-powered volume converter that can be connected to gas meters from Elster or other manufacturers. As an alternative to recording the flow proportional pulses for the operating volume (LF or HF), the EK280 can also read the original meter readings via a gas meter's Absolute Encoder. The volume converter calculates the conversion factor and compressibility factor based on consumption data and analog measurements of gas temperature and pressure. Volumes and volume flows under base and metering conditions are calculated from these data.
The EK280 consists of a base unit with an integrated or external pressure sensor and a temperature sensor permanently coupled to the unit. The compressibility factor can be programmed as a constant for all gases or calculated by various methods. Optionally, a 2G or 4G modem can be integrated directly into the volume converter for data communication.
In addition, additional sensors and status signals can be connected for station monitoring. Data transfer to a SCADA system or remote control can be done independently of data transfer to a billing system.
The interfaces of the volume converter function independently and support different data protocols.

Features and Benefits:

• MID approval according to EN 12405-1:2011-04
• ATEX:
  • Ex zone 0/1, Ex ia IIB T3 or Ex ia IIB T4
  • Ex zone 2, Ex after IIC T6 GC with integrated power supply (LCIE 12 ATEX 1015 X)
• Ambient temperature range: -25° to +55°C
• IP 65 according to EN 60529
• 6 digital inputs, 4 digital outputs
• 2 pressure sensors -type ENVEC CT30, with pressure ranges: 0.7 - 2 bar / 0.8 - 5 bar / 2 - 10 bar / 4 - 20 bar / 8 - 40 bar / 14 - 70 bar (other ranges on request)
• Temperature sensor - type Pt-500 four-wire resistance thermometer - temperature range: -30° to +75°C
• Communication Protocols: IEC 62056-21, Modbus ASCII/RTU/TCP, DLMS/COSEM Protocol (other communication protocols on request)
• Archiving and logging possible

Documentation: