multimess F144-PQ analyser - fault recorder

Power Quality analyser and fault recorder.

multimess F144 PQ

multimess F144-PQ stationary power quality analyzer and fault recorder

The power quality analyzer and fault recorder multimess F144-PQ for low, medium and high voltage networks is the central component of a system that can be used to solve all measurement tasks in electrical networks.

Detect possible malfunctions before they lead to a loss of production or defects in plant components. The multimess F144-PQ measures and monitors the network quality. It can be used as a power quality interface according to network quality standards, such as IEC61000-2-2 / EN50160 or to check technical connection guidelines, such as DIN VDE AR 4110 and DIN VDE 4120.

The network analyzer is designed primarily for measurements in industrial environments with up to 690 V (L-L) measurement voltage as well as for measurements in public networks.

The 5th current transformer input for measuring the residual current (RCM) as well as the frequency measurement of voltage and current harmonics in accordance with IEC 61000-4-7 from 2 kHz to 9 kHz are available as options. Especially this measurement from 2 kHz to 9 kHz is existential, since many clock frequencies of converters and inverters exist in this range.

Besides the possibility of standard evaluations, the multimess F144-PQ also has a high-speed disturbance recorder with a recording rate of 40.96 kHz/10.24 kHz as well as a 10ms RMS rms recorder. This makes an even more detailed evaluation of network interferences possible.

In addition, it is possible to freely program response thresholds for alarm messages or warnings. A device for increasing your operational safety.


  • Power quality according to EN 50160 and IEC 61000-2-2/2-4
  • IEC 61000-4-30 Class A
  • Fault recorder (oscilloscope, rms value, event)
  • Comfortable visualization software WinPQ/PQ
  • Control system connection (TCP/IP, IEC 61850)
  • Difference current measurement
  • Harmonic measurement up to 9 kHz optional
  • … and many other advantages

Technical Data

  • 5-Zoll-Color display
  • IEC 61000-4-30, Class-A-Measurement data processing
  • Recording of voltage quality incidents according to DIN EN 50160; IEC 61000-2-2; -2-12;-2-4
  • 1 GB internal memory (32GB expandable)
  • Bandwidth 20 kHz
  • Difference current measurement RCM
  • 4 Voltage inputs, Accuracy < 0,1 %
  • 5 Current inputs
  • Simultaneous processing of sampled and calculated voltages and currents
  • Voltage and current oscillograph sampling frequency: 40,96 kHz / 10,24 kHz
  • Half-cycle recorder: line frequency, rms voltages and currents (RMS), voltage and current pointers, power recording rate: ~10ms (50Hz) / ~8,33ms (60Hz)
  • Powerful triggering

Technical details

Technical details multimess F144-PQ
Color display 5-Zoll
Keypad for basic configuration on the device yes
Memory 1GB internal, up to 32GB SD card yes
Protection type IP 54 (in installed condition)
Voltage inputs, accuracy < 0.1 % 4
Current inputs 1/5 A rated current 4
Measuring channel band width 20 kHz (voltage and current) yes
ICE61000-4-30 Edition 3 Class A yes
Residual current input RCM optional
Temperature input PT100/PT1000 yes
Digital inputs 8
Digital outputs 4
Voltage and current oscillograph 10.24 kHz (40.96 kHz option) yes
Online streaming of voltages and currents yes
Voltage and current harmonics 2. – 50. Harmonic yes
Voltage and current harmonics 51. – 180. Harmonic optional
Interfaces Ethernet / RS 485
Communication protocol  Modbus RTU | TCP
Mounting Panel mounting, 144 x 144 mm
Dimensions L x W x H (without terminals) 144 x 144 x 90 mm
Dimensions L x W x H (with terminals) 144 x 180 x 110 mm
Dimensions breakout dimension (+0.8 mm) 138 x 138 mm
Weight 1220 g
Free evaluation software WinPQ Lite yes


Measurement and functions multimess F144-PQ

Automatic event detection and measurement standards:
EN50160 (2013) / IEC61000-2-2 / IEC61000-2-12 /IEC61000-2-4 (Klasse 1; 2; 3) / NRS048 / IEEE519 / IEC61000-4-30 Klasse A / IEC6:1000-4-7 / IEC61000-4-15

Permanent recording:
Five fixed and two variable measurement time intervals are available for permanent recording: 10/12 T (200ms), 1 sec, n*sec, 150/180 T (3sec), n*min, 10 min, 2 Std.

Measurement and functions
Voltage time interval 10/12
Network frequency, 10-s value (IEC61000-4-30)
Extreme, standard deviation of the network frequency (10 s)            
RMS values (IEC61000-4-30)
Extremes, standard deviation of T/2 values            
Breakdown [%], Overvoltage [%] (IEC61000-4-30)      
Harmonic subgroups n = 0...50 (IEC61000-4-7)      
Maximum values of 10/12 T harmonic subgroups n = 2..50            
Interharmonics subgroups n = 0...49 (IEC61000-4-7)      
Total distortion factor (THDS) (IEC61000-4-7)
Partially weighted distortion factor (PWHD)
Asymmetry, negative/positive sequence, sequence characters
Asymmetry, zero/positive sequence
Positive/Negative/Null Sequence Pointer
Phase angle (fundamental wave)
Flicker (IEC61000-4-15)          
Instantaneous value flicker (IEC61000-4-15)          
Ripple-control voltage [%] (IEC61000-4-30)          
Phase angle (zero crossings) of the phase voltage harmonic
n = 2. - 50. to the fundamental of the reference voltage
Frequency bands 1. - 35. 2 kHz - 9 kHz, RMS



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