UMG 104
(Universal measurment device for Din Rail)

Energy measurement device for DIN rails

The UMG 104 equipped with a 500 MHz DSP (digital signal processor) is a very fast and powerful power analyser.

Harmonics occur due to operating equipment with a non-linear characteristic, e.g. transformers used in saturation, energy saving bulbs, frequency converters and power electronics. They cause a load on the mains due to additional currents and can affect or even destroy operating equipment. This mains feedback can be detected and documented using power quality analysers.
Accuracy of Measurement
The high accuracy of measurement is due to the high sampling rate and very good long-term stability. If used as intended (ambient temperature!), accuracy of measurement is always better even after years of use than that of conventional meters immediately after delivery. Devices that are certified according to class A are available for measuring tasks that are particularly demanding.
Many UMG measuring devices have their own memory containing typical recording ranges of up to 2 years. Recording is freely configurable. A 128 megabyte memory can record around 5,000,000 values.
Thermistor Input
The integrated thermistor input for thermal elements (PT 100/1000, KTY 83 or 84) can be used in diverse ways. Therefore, sensitive system parts can have further protection in addition to current and power monitoring, e.g. transformer temperature. Typical application areas are temperature monitoring in low voltage main distribution systems, transformers or server cabinets.

  • Profibus (DP / V0) (optional)
  • Modbus RTU

  • RS232
  • RS485

Power Quality
  • Harmonics up to 40th harmonic
  • Unbalance, rotary field indication
  • Distortion factorTHD-U /THD-I
Accuracy of Measurement
  • Energy: Class 0.5 S (... / 5 A)
  • Current: 0.2 %
  • Voltage: 0.2 %
Temperature measurement
  • PT100, PT1000, KTY83, KTY84

Measured data memory
4 MByte Flash (156,000 measured values)

  • IT, TN, TT networks
  • 3 and 4-phase networks
  • Up to 4 single-phase networks

Network visualisation software
  • 4GridVis®-Basic (in the scope of supply)

2 Digital Inputs
  • Pulse input
  • Signalling input logic
  • State monitoring

2 Digital Outputs
  • Pulse output kWh / kvarh
  • Switch output
  • Threshold value output
  • Logic output

Areas of Application
  • Consumption data acquisition and evaluation (load profiles, load curves)
  • Continuous power quality monitoring
  • Cost centre accounting of energy costs
  • Network protection
  • Measured value transducer for building management systems or PLC

Power quality
  • Harmonics analysis up to 40th harmonic
  • Unbalance
  • Rotary field indication
  • Distortion factorTHD-U /THD-I
  • Measurement of positive, negative and zero sequence component
  • Fast and reliable data exchange via RS485 interface
  • Speed up to 921.6 kB/s
Secure and rapid communication via Modbus and Profibus
  • Rapid, cost-optimised and reliable communication in existing Fieldbus architectures
  • Integration in PLC systems and building management systems
  • High flexibility due to the use of open standards
Large measurement data memory
  • 4 MByte
  • 156.000 saved values
  • Recording range dependent on the user-defined measurement data memory configuration over a few months
  • Recording freely configurable
Added value through additional functions

The UMG 104 goes far beyond the limits of digital multifunction measurement devices thanks to the integration of additional functions:

  • Multifunction measurement device
  • State monitoring
  • Data logger
  • Meters (kWh, kvarh)
  • Temperature monitoring
  • Harmonics analyser

Due to the four current and voltage inputs there are also particular advantages with the monitoring of up to four single- phase outputs, e.g. in data centres, offices or single-phase motor outputs. Chapter 02 UMG 104 Fig.: Large measurement data memory UMG 104 

Dimension Diagrams(in mm)
Janitza-UMG 104-Massbild-1-Frontal-Seite
Typical Connections