One-shot Results for Narrowband, Full Spectrum and Harmonics
| Measurement Channels |
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| Features |
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| Memory and Interfaces |
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| Miscellaneous |
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In Power meters of traditional construction, a signal first passes through an analog processing, the output values are digitized by an A / D converter and then processed. The resulting signal may then either measured over the full range, or treated with anti-aliasing filters, e.g., to serve as the basis for an FFT or other digital filtering. By restriction to an A / D converter, one has to taken certain disadvantages into account. If measured with a filter, in order to avoid aliasing in the FFT, the broadband values are lost. When the filter is disengaged, strictly speaking, the FFT has to be omitted. If the FFT is performed without anti-aliasing filter for measurement over the full bandwidth, the quality of the calculated values is questionable. For example, an aliasing error of 50% would of course be easily detected, a deviation of 0.5% could remain unnoticed. Finally, it can be switched back and forth between measurements with and without filters. The validity of these results is, however, also doubtful, as would be expected of a temporal invariability of the signal, which is hardly ever the case in reality. Moreover, this method is extremely time consuming.
Ultimately, the shown measurement methods are unsatisfactory compromises. For this reason, ZES ZIMMER has radically redesigned the signal conditioning and developed the DualPath architecture. The analog side corresponds to the conventional instruments, the subsequent digital processing, however, was revolutionized. The power analyzers of the LMG600 Series are the first power meters featuring two A / D converters in each of the two independent signal paths for current and voltage channel. A filter for the contact measurement of the broadband signal, and another for the narrowband signal at the output of anti-aliasing filter. By means of parallel processing of the digitized samples, the user has access to both measurements of the same signal without the risk of aliasing. This unique process eliminates all the disadvantages of previous approaches and guarantees accurate results in the shortest time.
High sampling rate of up to 1.2 MS/s
Calculation of RMS values with a minimum cycle time of 10 ms.
Extremely high measurement accuracy of 0.015 % of the measured value + 0.01 % of the measuring range limit
Full dynamic range continuously available from 500 μA to 32 A and 3 mV to 1000 V
Power measurement from standby to full load (max. 32 A) possible without mechanical changes
Analog frequency range from DC up to 10 MHz
Harmonic analysis of up to 1000th order in the GUI and 2000th order via interface
Configuration with 1 to 7 power measuring channels (alternatively 6 measuring channels and Process-Signal-Interface)
Retrofitting of channels available!
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Power measurements on inverter / motor combination with DC |
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Power measurements on inverter / motor combination 3-phase |
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Inverter with DC link 1-phase Input 3-phase Output |
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Inverter measurements 1-phase Input 3-phase Output |
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power measurement of 3-phase motors |
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Efficiency measurement of power supplies |
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Measuring of core losses |
In the wake of stricter monitoring of consumption and efficiency of electrical appliances, new standards and procedures (eg SPECpower_ssj2008, IEC 62301) will continuously be created to enable an objective comparison of the different manufacturers. Whether it is workstations, servers or appliances, is irrelevant to the principle: The long-term evaluation of the power consumption has always to take all relevant operating conditions into account. The differences between minimum load - e.g., Idle mode, - and full load can thereby be of considerable magnitude, which requires a very sophisticated means of measurement (see also Application Note No. 102, "Measurement of standby power and energy efficiency."). The measurements must be carried out over several hours and may not show any gaps. By selecting a sufficiently large measurement range, range changes and the inevitably resulting data losses can be avoided. The fundamental precision LMG600 also ensures an accurate measurement at the lower limit of a range.
The fast switching semiconductors used to improve the efficiency of modern frequency converters cause extremely steep voltage edges. The resulting capacitive currents affect the bearings and the motor insulation - this can lead to premature failure.
Motor filter (e.g. du / dt filter) attenuate the voltage gradient, but generate themselves power dissipation due to the settling of the filters' frequencies (typically > 100 kHz). The high bandwidth and the small time difference between the current and voltage of the LMG600 enable highly accurate power loss measurements on the filters at these frequencies, and longitudinal measurements with small cos φ. This also applies to power measurements at high bandwidths up to 10 MHz. This requires that the current and voltage channels must be designed for minimum delay differences; in the LMG600 it is less than 3 ns; this corresponds to 50 Hz at an angle error <1 μrad. The instrument is therefore ideally suited for the power loss measurement at small phase angles for transformers, inductors, capacitors and ultrasonic sensors. No options or adjustments are necessary, as the devices will fully meet this measurement task already in the default setting when shipped. For measurements on circuits of highest performance, typically current and voltage transducers are employed. The phase angle of the converter can be corrected via the runtime menu and thus the measurement accuracy can be improved.
Reliable even in areas with difficult electromagnetic conditions
*Voltage range extension (L60-CH-S-VRE) to 1500 VDC optionally available
Particularly low earth capacitance of < 90 pF avoids interference by leakage currents
12 months guaranteed calibration for low maintenance cost and optimum equipment availability
Free calibration protocol included at first delivery
All ZES ZIMMER power meters of the LMG series, the current sensors of PCT series and the voltage sensors of the HST series are carefully tested, adjusted and calibrated prior to shipment and are subject to strict quality controls.
ZES ZIMMER guarantees for a period of 24 months from first delivery that these products are free from defects in material or workmanship.
Harmonics and inter-harmonics up to the 1000th order in Remote-GUI and up to the 2000th order via interface, in accordance with standards as per EN61000-4-7
(optional) speed / torque sensor inputs via the menu on all signal types
freely configurable (analog, frequency and RS422, TTL or HTL)
(Remote-GUI via LMG600 Control - LMG Remote)
Flexible scripting tool for special applications
Convenient calculation of all derived variables in the power analyzer
(Remote-GUI via LMG600 Control - LMG Remote)
Simultaneous measurement of I, V and P-variables and harmonics
Presentation in tabular or graphical form
Signal filter freely adjustable according to frequency, type and characteristics
(Remote-GUI via LMG600 Control - LMG Remote)
Although the LMG600 offers an unsurpassed dynamics in both the voltage and current range, there are always applications with exceptional demands on the measurement areas. Whether this is to currents of several hundred amperes and voltages of several kilovolts, ZES ZIMMER has a suitable solution at hand. We provide a wide range of current and voltage sensors that is perfectly matched to the precision power meter LMG600 and expands the measurement range of the instrument to the necessary degree. The sensors of our "Plug'n Measure" series are equipped with a bus system, which allows automatic configuration of LMG600. All important parameters, such as the exact scaling factor, the term compensation quantity, the last calibration date and the sensor type, are automatically read by the power meter and included in the measurements. In addition, the sensors' operating power is supplied by LMG600, so that a separate power supply is not necessary. With "Plug'n Measure" mal-adjustment by the user is avoided and the best possible measurement results are guaranteed. From the user's point of view, no difference between direct and sensor-based measurement is perceptible. Of course, other conventional sensors can also be used with the LMG600.
(Remote-GUI via LMG600 Control - LMG Remote)
Wechselwirkungen zwischen Netz und Verbrauchern nach EN61000-4-15
Direct access to high-resolution sample values and harmonics via interfaces
For a 3-phase 3-wire system only the phase voltages U12, U23, U31 and the phase currents I1, I2, I3 are amenable to measurement. With the help of star-delta conversionline, voltages can be determined in the inaccessible phase voltages, converted into the associated active powers. In analogy, the phase currents can be converted into the "chained" currents. From the values thus calculated, all other variables, e.g. harmonics, are derived. Distortions and asymmetries of power and consumers are considered correctly. The use of an external artificial neutral point is thus superfluous, but such can be connected, if required, at any time, in case the associated disadvantages (e.g. increased power dissipation) are accepted.
The LMG Remote PC software allows to easily control the LMG671 remotely from a Windows PC. Since this software mimicks the measuring device itself down to the last detail, the LMG671 can be operated as usual, even from the PC - no rethinking required, no familiarization time.
Internal storage even of long-term measurements with the shortest cycle time, thanks to high-capacity mass-storage device
Optional additional internal SSD for mass storage of sample data over long time periods
Excellent connectivity with USB3.0, Gigabit-Ethernet, CAN, RS-232 and DVI/HDMI
Display only what you really need in a way that helps you most to achieve the task at hand - as easy as 1-2-3:
| L60-CH-S | S-Channel for high-precision broadband and DC-optimized measurements |
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DC-optimized, with DualPath functionality, bandwidth DC-10 MHz, best power accuracy 0.015% + 0.01% 18 bit channel resolution Measuring inputs: 1. Voltage directly: 300 mV - 1000 Vtrms/1500 VDC in 10 ranges, 3200 Vpk 2. Voltage sensor input: 3 mV - 4 Vtrms/10 VDC in 8 ranges, 12.5 Vpk 3. Current directly 500 μA-32 Atrms in 10 ranges, 120 Apk 4. Current sensor input: 3 mV - 4 Vtrms/10 VDC in 8 ranges, 12.5 Vpk |
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| L60-CH-A | A-Channel for high-precision broadband measurements |
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with DualPath functionality, bandwidth DC-10 MHz, best power accuracy 0.015% + 0.01% 18 bit channel resolution Measuring inputs: 1. Voltage directly: 300 mV - 1000 Vtrms in 10 ranges, 3200 Upk 2. Voltage sensor input: 3 mV - 4 Vtrms in 8 ranges, 12.5 Upk 3. Current directly 500 µA-32 Atrms in 10 ranges, 120 Ipk 4. Current sensor input: 3 mV - 4 Vtrms in 8 ranges, 12.5 Upk |
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| L60-CH-B | B-Channel for general purpose measurements |
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with DualPath functionality, bandwidth DC - 500 kHz, best power accuracy 0.05% + 0.02% 16 bit channel resolution Measuring inputs: 1. Voltage directly: 300 mV - 1000 Vtrms in 10 ranges, 3200 Upk 2. Current directly 500 µA-32 Atrms in 10 ranges, 120 Ipk 3. Current sensor input: 3 mV - 4 Vtrms in 8 ranges, 12.5 Upk |
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| L60-CH-C | C-Channel for high-precision measurements up to 10kHz |
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bandwidth DC - 10 kHz, best power accuracy 0.03% + 0.01%, 16 bit channel resolution Measuring inputs: 1. Voltage directly: 300 mV - 1000 Vtrms in 10 ranges, 3200 Upk 2. Current directly 500 µA-32 Atrms in 10 ranges, 120 Ipk 3. Current sensor input: 3 mV - 4 Vtrms in 8 ranges, 12.5 Upk |
| L6-OPT-CE-FLK |
Option Package CE Flicker for LMG600, consisting of: - the LMG flicker meter according to EN61000-4-15 (L6-OPT-FLK) as well as - the PC software* LMG Test Suite (LMG-TEST-CE-FLK) for analysis of measured values according to EN61000-3-3 and EN61000-3-11 for 1-phase and 3-phase* equipment under test |
| L6-OPT-CE-HRM |
Option Package CE Harmonics for LMG600, consisting of: - the harmonic analysis of the measured signals in the LMG (L6-OPT-HRM) as well as - the PC software* LMG Test Suite (LMG-TEST-CE-HRM) for analysis of measured values according to EN61000-3-2 and EN61000-3-12 for 1-phase and 3-phase* equipment under test |
| L6-OPT-CE-HRMFLK |
Option Package CE Harmonics and Flicker for LMG600, consisting of: - the harmonic analysis of the measured signals in the LMG (L6-OPT-HRM), - internal flicker meter according to EN61000-4-15 (L6-OPT-FLK) as well as - the PC software* LMG Test Suite (LMG-TEST-CE-HRM + LMG-TEST-CE-FLK) for analysis of measured values according to EN61000-3-2 / EN61000-3-12 and EN61000-3-3 / EN61000-3-11, each for 1-phase and 3-phase* equipment under test |
| L6X1-OPT-DVI |
DVI Interface for connection of an external display, beamer, touch device *Installed as standard |
| L6-OPT-PSI |
Process Signal Interface 8 digital inputs, 8 digital outputs, 2 fast analog inputs (150 kS/s, 15 kHz bandwidth), 8 slow analog inputs (DC), 32 analog outputs, 2 frequency inputs (frequency, orientation, position; DTL, HTL or differential) |
| L6-OPT-CAN |
CAN bus interface:
find more information here CAN bus connectivity according to ISO 11898-2 (high-speed CAN) - bit rate: 5 kbit/s to 1Mbit/s - galvanic separation at CAN connector: up to 500V - active support of CAN 2.0A and B standards - Standard Frame Format or Extended Frame Format for sending measurement results - manual polling of measurement values possible via Remote Transmission Request (RTR) |
| L6-OPT-SDC |
Star-Delta-Conversion Minimum requirement LMG600 with at least 3 power channels of the same type |
| L6-OPT-EVT |
Event Triggering:
find more information here triggering on crossing voltage or current thresholds recording of 16 tracks with up to 16 million values each |
| L6-OPT-HRM |
Harmonic analysis up to max. 1000th order (2000th order with interharmonics) of U, I, P, Q and S, fundamental 3 ... 1200 Hz, up to 150 kHz (A channel) resp. 15 kHz (B channel) or 10 kHz (C channel) with anti-aliasing filter, customizable settings for the detection of interharmonics |
| L6-OPT-FLK | Flicker meter according to EN61000-4-15 |
| L6-OPT-SMV |
Smart Vision Smart add-on functions for the convenient evaluation of measurements The package includes: - Painter: screenshots can be enriched with valuable additional information directly in the GUI before saving - Env Var Watcher: script-controlled visual watchdog as part of a custom menu |
| L6-OPT-SPV |
Sample Value Analysis Module for LMG600 Software* for continuous and gapless streaming of sample values on 16 tracks at a rate of 10 kS/s (up to 1.2 MS/s under optimal conditions), furthermore: - display of sample recordings in ZLR format - display of frequency spectrum of recorded sample values - calculation of RMS values of voltage, current and power - CSV or MATLAB export of frequency spectrum and RMS values |
| L6X1-OPT-MSD |
Mass Storage Device for Measurement Results Internal mass storage device for long-time recording of measurements (capacity 250 GB) Some space is used for the system. |
* System requirements:
- Operating system: Windows 7/8/10 (32/64 bit)
- Hard drive: software: min. 50 MB, data: approx. 20 MB per minute of measurement/phase
- RAM memory: min. 2 GB
- Processor: min. 2 GHz, dual-core
- Interfaces supported: Gbit-Ethernet
| Dimensions | Width | Height | Depth |
| LMG671 (Rack) | 84 HP | 4 RU | 590 mm |
| Weight | Depending on installed options: max. 18.5 kg | ||
| Protection class | EN 61010 (IEC 61010, VDE 0411), protection class I / IP20 in accordance with EN 60529 | ||
| Electromagnetic compatibility | EN 61326 | ||
| Temperature | 5 ... 40 °C (operation) / -20 ... 50 °C (storage) | ||
| Climatic category | Normal environmental conditions according to EN 61010 | ||
| Line input | 100 ... 230 V, 47 ... 63 Hz, max. 400 W | ||
Further technical data as below is available under the "Downloads" dropdown in the product brochure or on request to sales@zes.com or via our contact form in the user manual:
Furthermore, you will find the complete technical data in the user manual, which you can also export according to your installed firmware on your power analyzer in the "STORAGE" menu > "File Manager" tab > "Libraries" partition > "documentation" folder.
Firmware LMG600 series: Firmware update 3.151 now available upon request.
| L6-X-00-D | LMG600 manual in German |
| L6-X-00-E | LMG600 manual in English |
| L6-X-ADSE | Adaptor for LMG600 to connect sensors and current clamps |
| L6X1-OPT-HDL2 |
Handles for LMG671//LMG-ATE, 2 pcs. for front face, CNC milled and powder-coated |
| L6X1-OPT-HDL4 |
Handles for LMG671//LMG-ATE, 4 pcs. for front face and rear side, CNC milled and powder-coated |
| L6-ACC-SYNC-2 | Sync cable for pair of LMG600 |
| L6-ACC-SYNC-3 | Sync cable for 3x LMG600 |
| L671-X-01 | 19 inch rack mount kit for LMG-ATE (installed as standard) |
| L6-ACC05 | Transport case for LMG640/67x/ATE and accessories |
