Network analyzer and disturbance recorder - Class A measuring device

multimess F144-PQ

Energy measuring devices
multimess F144 PQ 1

The multimess F144-PQ power quality analyzer and fault recorder is a stationary measuring device for low, medium and high-voltage grids and is the central component of a system with which you can solve all your measurement tasks in the electrical grid.

Detect potential faults before they lead to production downtime or defects in system components. The multimess F144-PQ measures and monitors the power quality. It can be used both as a power quality interface in accordance with power quality standards such as IEC61000-2-2 / EN50160 and for checking technical connection guidelines such as DIN VDE AR 4110 and DIN VDE 4120.

The network analyzer was developed 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 (Residual Current Monitoring RCM) and the frequency measurement of voltage and current harmonics in accordance with IEC 61000-4-7 from 2 kHz to 20 kHz are available as options. Especially this measurement from 2 kHz to 20 kHz is of existential importance, as many clock frequencies of inverters and converters are present in this range.

In addition to 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 10 ms RMS effective value recorder. This enables an even more detailed evaluation of network faults that have occurred.

It is also possible to freely program response thresholds for alarm messages or warnings. A device for increasing your operational safety.

Technical data
Technical details
  • Power quality according to EN 50160 and IEC 61000-2-2/2-4
  • IEC 61000-4-30 Class A
  • Disturbance recorder (oscilloscope, RMS value, event)g
  • Convenient visualization software WinPQ/PQ
  • Control technology connection (TCP/IP, IEC 61850)
  • Residual current measurement
  • Harmonic measurement up to 9 kHz optional
  • … and many other advantages
  • 5-inch color display
  • IEC 61000-4-30, Class A measurement data processing
  • Recording of power quality incidents according to
  • DIN EN 50160; IEC 61000-2-2; -2-12;-2-4
  • 1 GB internal memory (32GB expandable)
  • Bandwidth 20 kHz
  • RCM residual current measurement
  • 4 voltage inputs, accuracy < 0.1 %
  • 5 power 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: mains frequency, effective voltages and currents (RMS), pointer for voltage and current, power recording rate: ~10ms (50Hz) / ~8.33ms (60Hz)
  • Powerful trigger releases
Technical details multimess F144-PQ
Color display 5-inch
Keypad for basic configuration on the device Yes
Memory 1GB internal, up to 32 GB SD card Yes
Protection class IP 54 (when installed)
Voltage inputs, accuracy < 0.1% 4
Current inputs 1/5 A rated current 4
Measuring channel bandwidth 20 kHz (voltage and current) Yes
ICE61000-4-30 Edition 3 Class A Yes
RCM differential current input 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 2nd – 50th harmonics Yes
Voltage and current harmonics 51. – 180. Harmonic optional
Interfaces Ethernet / RS 485
Communication protocol Modbus RTU | TCP
Assembly 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 clamps) 144 x 180 x 110 mm
Dimensions Break-out 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 (Class 1; 2; 3) / NRS048 / IEEE519 / IEC61000-4-30 Class A / IEC6:1000-4-7 / IEC61000-4-15

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

Measurement and functions:
Time interval Voltage 10/12
Mains frequency, 10s value (IEC61000-4-30)
Extreme, standard deviation of the mains frequency (10s)
Effective values (RMS) (IEC61000-4-30)
Extremes, standard deviation of T/2 values
Break-in [%], overvoltage [%] (IEC61000-4-30)
Harmonic subgroups n= 0..50 (IEC61000-4-7)
Maximum values of 10/12 T harmonic subgroups n = 2..50
Interharmonic subgroups n=0..49 (IEC61000-4-7)
Total harmonic distortion (THDS) (IEC61000-4-7)
Partially weighted distortion factor (PWHD)
Asymmetry, negative/positive sequence, sequence character
Asymmetry, zero/positive sequence
Positive, negative, zero sequence pointer
Phase angle (fundamental)
Flicker (IEC61000-4-15)
Instantaneous flicker value (IEC61000-4-15)
Ripple control voltages [%] (IEC61000-4-30)
Phase angle ( zero crossings) of the phase voltage
harmonics n=2..50 up to the fundamental of the reference voltage
Frequency bands 1..35 , 2kHz..9kHz, effective value (RMS)
Tablet mit Screenshot


More information (brochures, user manuals, etc.) under download.