They can be applied for the settlement of accounts with power stations, supervision of industrial processes, settlement of accounts with underleasers, and as elements of energy management systems. The housing enables to place on the terminal cover a legal seal and the seal of the power plant.

The watt-hour meter equipment with the RS-485/MODBUS communication interface and a radio transmitter gives the possibility of a continuous monitoring, data archiving, visualization and report.

• The LS31 watt-hour meter can be inserted in existing computer network systems what enables to offer interface and protocol converters of LUMEL production.
  - connected to ETHERNET network through a PD8 converter,
  - monitored through INTERNET using a SM6 www server ensuring also the archiving of measuring data.

Technical description

• The LS31 watt-hour meter is equipped with dedicated 7-digit LCD with graphical symbols. As standard accessories there are: a pulse diode with a defined time-constant (imp/kWh), two-position switch, interface for data transmission in infrared communication.
• The optional equipment of LS31 watt-hour meters consists of:
• interface for RS-485 serial transmission with MODBUS,
• transoptor impulse transmitter (the number of generated impulses is proportional to the flowing active energy).

Extra functions

• display of customer code,
• display of the current date and real time,
• calendar of holidays,
• storage of annual program of the day division into time zones, separately for day-offs with the possibility to introduce changes by means of the photo-electric coupling,
• automatic closing of account periods in the given day of the month at a defined time or on request, on the readout day (photo-electric coupling),
• recording of the external magnetic field presence,
• sequential display of measured quantities on the LCD display:
• active energy in time zones and summary,
• energy at the end of the account period in time zones and summary, date and time of the account period closing,
• 15 or 60 minutes’ maximal averaged power, with a time index,
• cumulated power.