Volume Conversion Device EK260
Elster GmbH 7
1 Brief description
The EK260 Volume Conversion Device is used for the conversion of the gas volume
measured at line conditions by a gas meter into the base conditions and into the
appropriate energy.
The pressure and temperature are measured for the determination of the line conditions.
The inverted compressibility factor ratio (K-value) can alternatively be calculated according
to S-GERG 88 or AGA-NX19 or it can be entered as a constant. The volume is converted
into energy using the adjustable calorific value.
The integral recording device contains meter readings and maxima from the last
15 months and the consumption profile of the last 9 months for a measurement period of
60 minutes.
Power supply:
• Battery operation with a service life depending on operating mode ≥ 5 years.
• Optional double battery life is possible by connection of an additional battery pack.
• Battery replacement possible without loss of data and without violation of calibration seals.
• Data retention without battery supply due to internal EEPROM.
• Connection for external power supply unit.
Operator interface:
• Alphanumeric display with two lines of 16 characters.
• A display list freely assignable by the user.
• Programming via keypad possible.
• Calibration switch (separately sealed in the device).
• Calibration logbook according to PTB-A 50.7 for changing values relevant to calibration
without the calibration lock.
• Two user locks (supplier's and customer's locks) with numerical codes.
• Access rights for each individual value can be set separately via interface (with appropriate
rights).
Counter / signal inputs:
• 3 inputs for reed contacts or transistor switches, programmable as pulse or signal inputs.
• Connection provided for an Elster GmbH C1 Encoder Counter for digital transmission of
genuine counter readings (also in battery mode).
• Maximum counting frequency 2 Hz (adjustable).
• Pulse value for each input separately adjustable, also non-decade.
• Various counters for Vb and Vm and for each input (main counter, original counter,
disturbance volumes, totaliser, adj. counter, measurement period counter, day counter).
• Each input can be separately sealed and secured under official calibration.
Pulse / signal outputs:
• 4 programmable transistor outputs, each freely programmable as alarm / warning output,
pulse output, signal output for limit monitoring.
• Each output can be separately sealed and secured under official calibration.
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