Elster Instromet EK205, Operating Manual, Page: 23 / 71

Construction and function 23
4.3 Brief description
The volume converter EK205 is an explosion-protected, electronic device that calculates from
a volume of a gas determined by an external meter in operating mode the volume in normal
mode and therefore the energy share of the relevant gas volume.
In addition, using the registration function, the reporting inputs / outputs, the serial and optical
data interfaces of the device, the gas load of a line can be monitored, registered and passed
on.
The recording of the status parameters required for this is carried out via an internally
connected pressure sensor and a temperature sensor. When using the EK205 as a
Temperature Conversion Device, the momentary values of temperature are measured and
the pressure is set as a constant. As an operating element of the EK205, an alphanumerical
display and a keyboard on the front side of the device are available.
4.4 Connections
The Volume Conversion Device EK205 has connection options for:
 Two batteries
To monitor and register the calculated data and to pass on the data and program its
functions, the following are available:
 2 meter and reporting inputs DE1, DE2
 2 pulse and reporting outputs DA1, DA2
 Serial data interface
 Optical data interface
Details on the connection options of the EK205 and the deliverable equipment
variants can be found under chapter Technical data and under chapter
Installation, connection and commissioning.