NEMO 304

Portable power quality analyser - 4 voltage inputs and 4 current inputs - nominal current rate can be optionally selected in range 10-10000A (depends on actual probe). Communication options include USB, WiFi and GPRS

NEMO 304 is a portable multifunctional power meter and power analyser with datalogger functions. It is suitable for low, medium and high voltage networks (measured via voltage transformer). Its large internal memory can store months of typical measurements and also records disturbance data, log, electricity meter reading and other critically important information.

NEMO 304 shares many features with its predecessors SIMON and SMPQ but is designed in different - compact and portable enclosure. It supports measurement of current with flexible current probes. Each probe can set 4 different nominal AC measuring ranges. Flexible CT is simple for manipulation. 

  1. Specifications
  3. Ordering
  4. Software
  5. Firmware options

Specifications and properties

  • four voltage inputs for measurement, separated power supply input
  • power supply 85-480 Vac / 100-600 Vdc or over USB, internal accumulator
  • 4 current measurement inputs capable to connect the Bxxx current probe
  • one input for PT 100 temperature sensor
  • internal memory capacity 512 Mb
  • 128 samples per period, aggregation 200 ms or higher (user defined)
  • voltage is sampled continuously, current semi-continuously depending on the nr. of active inputs
  • frequency, power (active, reactive, distortion), power factors
  • harmonic components (up to 50th, including angles, interharmonics , THD), flicker, unbalance...
  • records power quality events (dips, sags, swells)
  • optionaly records detailed event trends and oscillograms of the redefined events
  • power quality evaluation according to EN 50160
  • USB port for configuration and data acquisition, optionally wifi module for local communication
  • ENVIS 1.1 supports all features of NEMO instruments
  • internal battery backed real time clock
  • Typical wiring - schema

    Typical use case for the NEMO 304 power quality data logger.

    Types and Accessories

    NEMO 304 type ordering codes and optional accessories are displayed in the following diagram. 

    Types and options of NEMO 304 analyser.

    NEMO 304: Supported flexible current probes.

    NEMO 304 ordering codes and optional ccessories are displayed in the following diagram. 

    NEMO 304: Supported flexible current probes.

    ENVIS application suite provides all features for basic instrument management (configuration, supervision, fw update). It also downloads and archives data from all the supported instruments. import/export, data analysis and advanced reporting of the records is also provided. ENVIS is available free of charge to be used with all our instruments.

    Typická instalace aplikace ENVIS

    ENVIS.Online system service can be used to implement complex power quality monitoring and/or energy efficienci control and monitoring systems. By using email,  SMS or SNMP all registered users and administrators can be warned upon exeptional situations, malfunction of supply or monitored instruments or it can be used to post periodical analysis/reports.

    Additional plugin modules can also add special features or customizations to booth ENVIS and ENVIS.Online in a modular manner. 

    Typical installation of ENVIS


    Optional firmware modules

    Voltage and power event cycle data logger module.
  • Ripple Control (Mains) Signals - RCS Module: for measurement, recording and analysis of a ripple control signal. Several formats of the telegram are also supported for decoding.
  • Voltage Events - VE Module: for recording and evaluation of voltage events (SMVQ & SMPQ does include this feature in its default configuration).
  • General Oscillograms - GO module: for detection and precise recording of various waveform distortions. This module records the so called oscillograms of voltages and currents in extended detail, capacity and trigger options into the flash memory.
  • Modbus Master - MM module: in supported instruments with memory it activates new option to record Modbus data from connected slave devices. It can work as a datalogger to NOVAR PFCs as well as to local sub-meters or other Modbus sensors.
  • See: other data loggersENVIS 1.1 for data analysis, built-in meters and analysers.