LMG611
Single Channel Precision Power Analyzer as Compact Desktop Device
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Product description

 

LMG611 - The Most Precise in its Class

One-shot Results for Narrowband, Full Spectrum and Harmonics

Features:

Measurement Channels
  • Outstanding accuracy of 0.015% of measured value + 0.01% of range
  • Full dynamic range of 500 µA to 32 A / 3 mV to 1000 V per channel available in single instrument
  • Power measurements from standby to full load (max. 32 A) without mechanical changes
  • Analog bandwidth DC up to 10 MHz
  • Gapless sampling up to 18 bit and a minimal cycle time of 30 ms
  • Delay time between V and I input < 3ns, very precise measurements at small power factors (PF) and/or high frequencies
Features
  • Simultaneous measurement of narrow- and broadband values through innovative DualPath architecture
  • Simultaneous capturing of fundamental frequency and broadband RMS values for instantaneous detection of losses, resp. high-frequency components
  • Harmonics and interharmonics up to 2000. order, as required by EN61000-4-7
  • With optional I/O card speed/torque inputs freely configurable for all signal types (analogue, frequency as RS422,TTL or HTL) via menu
  • Flexible scripting tool for custom applications
  • Simultaneous measurement of V, I, P values and harmonics, presentation in tabular or graphical form
  • Signal filters freely configurable by frequency, type and characteristics
  • Synchronization to different frequencies
  • Flicker measurement, interactions between grid and appliance according to EN61000-4-15
User-Interface
  • Large and clearly arranged touchscreen GUI for intuitive handling
  • All instrument features displayed, identical look-and-feel for local and remote operation for quick and easy familiarization
Memory and Interfaces
  • Internal storage of long-term measurements even with shortest cycle-time thanks to integrated mass storage device
  • Excellent connectivity via USB2.0, Gbit-LAN, RS232, and DVI
Miscellaneous
  • Convenient "plug-and-measure" through automated sensor detection
  • no external sensor power supply required
  • 12 months guaranteed calibration interval for minimal service cost and optimal availability
  • Calibration certificate included free-of-charge in first delivery
  • 24 months warranty

 

Features 

The GUI you always wanted…

… in less than 20 minutes

LMG611 custom menu

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:

  • Arrange all relevant results on a single screen
  • Mix graphical and numerical data to compose meaningful views
  • Combine results from different channels and groups
  • Enrich measured data with derived values
  • Add your individual corporate touch by the use of logos and other graphical elements

 

Interfaces

Powerful interfaces

Excellent connectivity with USB3.0, Gigabit-Ethernet, RS232, CAN, and DVI

 

Remote control

LMG Remote

The LMG Remote PC software allows to easily control the LMG600 remotely from a Windows PC. Since this software mimicks the measuring device itself down to the last detail, the LMG600 can be operated as usual, even from the PC - no rethinking required, no familiarization time.

LMG Remote

 

Synchronization

Synchronize on frequencies

LMG611 group settings

 

Plug ’n’ Measure

Convenient commissioning with zero risk of misconfiguration

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.

 

Flexible Filter

Signal filter freely adjustable according to frequency, type and characteristics

LMG611 group settings

 

Harmonics

Harmonics and inter-harmonics up to the 1000th order (2000th order via interface), in accordance with standards as per EN61000-4-7

LMG611 harmonics

 

Warranty

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.

ZES Warranty Terms

 

Calibration

12 months guaranteed calibration for low maintenance cost and optimum equipment availability

Free calibration protocol included at first delivery

 

LMG611-Types

For every application the right channel type:

  • LMG611-A: 0.025 % accuracy, up to 10 MHz
  • LMG611-B: 0.07 % accuracy, up to 500 kHz
  • LMG611-C: 0.04 % accuracy, up to 10 kHz

LMG611-typen

 

Exact signal transit time

Exact measurements thanks to minimal runtime differences

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.

 

Continuity

Complete data collection

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.

 

DualPath

Simultaneous measurement in two bandwidths thanks DualPath - no compromises, no doubt

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.

DualPath

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.

 

Technical specifications

 

Dimensions Width Height Depth
LMG611 (Table top) 433 mm 177 mm 200 mm
   
Weight Depending on installed options: max. 7.2 kg
Protection class EN 61010 (IEC 61010, VDE 0411), protection class I / IP20 in accordance with EN 60529
Electromagnetic compatibility EN 61326
Temperature 0 ... 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. 200 W

Technical Data (Summary), valid for 0 ≤ λ ≤ 1

LMG611-A

Accuracy

        ± (% of measured value + % of maximum peak value)    
DC DCe) 0.05 Hz ... 45 Hz 65 Hz ... 3 kHz 45 Hz ... 65 Hz 3 kHz ... 10 kHz 10 kHz ... 50 kHz 50 kHz ...  100 kHz 100 kHz ...  500 kHz 500 kHz...1 MHz 1 MHz ... 2 MHz 2 MHz ... 10 MHz
Voltage U* 0.02+0.08 0.02+0.06e) 0.015+0.03 0.01+0.02 0.03+0.06 0.2+0.4 0.5+1.0 0.5+1.0 f/1 MHz*1.5 + f/1 MHz*1.5
Voltage USENSOR 0.02+0.08 0.02+0.06e) 0.015+0.03 0.01+0.02 0.03+0.06 0.2+0.4 0.4+0.8 0.4+0.8 f/1 MHz*0.7 + f/1 MHz*1.5
Current I* 5 mA...5 A 0.02+0.1 0.02+0.06e) 0.015+0.03 0.01+0.02 0.03+0.06 0.2+0.4 0.5+1.0 0.5+1.0

f/1 MHz*1.0 +

f/1 MHz*2.0

-
Current I* 10 A...32 A 0.02+0.1 [1]) - 0.015+0.033) 0.01+0.023) 0.1+0.23) 0.3+0.63) f/100 kHz*0.8 + f/100 kHz*1.23) - - -
Current  ISENSOR 0.02+0.08 0.02+0.06e) 0.015+0.03 0.01+0.02 0.03+0.06 0.2+0.4 0.4+0.8 0.4+0.8 f/1 MHz*0.7 + f/1 MHz*1.5
Power U*/ I* 5 mA...5 A 0.032+0.09 0.032+0.06e) 0.024+0.03 0.015+0.01 0.048+0.06 0.32+0.4 0.8+1.0 0.8+1.0

f/1 MHz*2.0 +

f/1 MHz*1.8

-
Power U*/ I* 10 A...32 A 0.032+0.092) - 0.024+0.034) 0.015+0.014) 0.104+0.134) 0.4+0.54)

f/100 kHz*0.8 +

f/100 kHz*0.84)

f/100 kHz*1.0 +

f/100 kHz*1.14)

- - -
Power U*/ ISENSOR 0.032+0.08 0.032+0.06e) 0.024+0.03 0.015+0.01 0.048+0.06 0.32+0.4 0.72+0.9 0.72+0.9 f/1 MHz*1.8 + f/1 MHz*1.5
Power USENSOR / I* 5 mA...5 A 0.032+0.09 0.032+0.06e) 0.024+0.03 0.015+0.01 0.048+0.06 0.32+0.4 0.72+0.9 0.72+0.9

f/1 MHz*1.4 +

f/1 MHz*1.8

-
Power USENSOR / I* 10 A...32 A 0.032+0.092) - 0.024+0.034) 0.015+0.014) 0.104+0.134) 0.4+0.54)

f/100 kHz*0.8 +

f/100 kHz*0.84)

f/100 kHz*1.0 +

f/100 kHz*1.04)

- - -
Power USENSOR / ISENSOR 0.032+0.08 0.032+0.06e) 0.024+0.03 0.015+0.01 0.048+0.06 0.32+0.4 0.64+0.8 0.64+0.8 f/1 MHz*1.1 + f/1 MHz*1.5

LMG611-B

Accuracy

    ± (% of measured value + % of maximum peak value)    
DC 0,05 Hz ... 45 Hz  65 Hz ... 1 kHz 45 Hz ... 65 Hz 1 kHz ... 5 kHz 5 kHz ... 20 kHz 20 kHz ... 100 kHz 100 kHz ...  500 kHz
Voltage U* 0.1+0.1 0.1+0.1 0.03+0.03 0.2+0.2 0.3+0.4 0.4+0.8

f/1 00 kHz*0.8 +

f/1 00 kHz*1.2

Current I* 5 mA...5 A

Current  ISENSOR

0.1+0.1 0.1+0.1 0.03+0.03 0.2+0.2 0.3+0.4 0.4+0.8

f/1 00 kHz*0.8 +

f/1 00 kHz*1.2

Current I*  10 A...32 A 0.1+0.11) 0.1+0.13) 0.03+0.033) 0.2+0.23) 0.6+1.23) 1.5+1.53)

f/1 00 kHz*2.0 +

f/1 00 kHz*2.03)

Power U*/ I* 5 mA...5 A

Power U*/ ISENSOR

0.16+0.1 0.16+0.1 0.05+0.02 0.32+0.2 0.48+0.4 0.64+0.8

f/1 00 kHz*1.28 +

f/1 00 kHz*1.2

Power U*/ I* 10 A...32 A 0.16+0.12) 0.16+0.14) 0.05+0.024) 0.32+0.24) 0.72+0.84) 1.52+1.154)

f/1 00 kHz*2.24 +

f/1 00 kHz*1.64)

LMG611-C

Accuracy

    ± (% of measured value + % of maximum peak value)    
DC 0,05 Hz ... 45 Hz  65 Hz ... 200 Hz 45 Hz ... 65 Hz 200 Hz ... 500 Hz 500 Hz ... 1 kHz 1 kHz ... 2 kHz 2 kHz ... 10 kHz
Voltage U* 0.1+0.1 0.02+0.05 0.02+0.02 0.05+0.05 0.2+0.1 1.0+0.5

f/1 kHz*1.0 +

f/1 kHz*1.0

Current I* 0.1+0.11) 0.02+0.053) 0.02+0.023) 0.05+0.053) 0.2+0.13) 1.0+0.53)

f/1 kHz*1.0 +

f/1 kHz*1.03)

Current  ISENSOR 0.1+0.1 0.02+0.05 0.02+0.02 0.05+0.05 0.2+0.1 1.0+0.5

f/1 kHz*1.0 +

f/1 kHz*1.0

Power 0.16+0.12) 0.032+0.054) 0.03+0.014) 0.08+0.054) 0.32+0.14) 1.6+0.54)

f/1 kHz*1.6 +

f/1 kHz*1.04)

Accuracies valid for:

1. Sinusoidal voltages and currents

2. Ambient temperature (23±3) °C

3. Warm-up time 1 h

4. The maximum peak value for power is the product of the maximum peak value for voltage and the maximum peak value for current.

5. 0 ≤ |λ| ≤ 1 (power factor)

6. Current and voltage
10 % ... 110 % of nominal value

7. Adjustment carried out at 23 °C

8. Calibration interval 12 months

 
Other values All other values are calculated from current, voltage and power. Accuracy resp. error limits are derived according to context (e.g. S = I * U, ΔS / S = ΔI / I + ΔU / U).  

1) 2) 3) 4) only valid in range 10 ... 32 A:

1) additional uncertainty ± 80μA/A2 * Itrms2          2) additional uncertainty ± 80μA/A2 * Itrms2 * Utrms    3) additional uncertainty ± 80μA/A2 * Itrms2        4) additional uncertainty ± 80μA/A2 * Itrms2 * Utrms  

e) Accuracy specification after non-persistent zero adjustment, temperature change after zero adjustment max. ±1°C

Voltage measuring ranges U*                  
Nominal value (V) 3 6 12.5 25   60 130 250 400 600 1000
Max. trms value (V) 3.3 6.6 13.8 27.5   66 136 270 440 660 1000
Max. peak value (V) 6 12 25 50   100 200 400 800 1600 3200
Overload protection  1000 V + 10 % permanently, 1500 V for 1 s
Input impedance         4.59 MΩ, 3 pF        
Earth capacitance         < 90 pF        
Current measuring ranges I*                      
Nominal value (A) 0.005 0.01 0.02 0.04 0.08 0.15 0.3 0.6 1.2 2.5 5 10 20 32  
Max. trms value (A) 0.0055 0.011 0.022 0.044 0.088 0.165 0.33 0.66 1.32 2.75 5.5 11 22 32  
Max. peak value (A) 0.014 0.028 0.056 0.112 0.224 0.469 0.938 1.875 3.75 7.5 15 30 60 120  
Input impedance ca. 2.2 Ω   ca. 600 mΩ   ca. 80 mΩ   ca. 20 mΩ     ca. 10 mΩ    
Overload protection permanent (A)     LMG in operation 10 A         LMG in operation 32 A      
Overload protection short-time (A)         150 A for 10 ms            
Earth capacitance         < 90 pF            
Sensor inputs USENSOR, ISENSOR              
Nominal value (V) 0.03 0.06 0.12 0.25 0.5 1 2 4
Max. trms value (V) 0.033 0.066 0.132 0.275 0.55 1.1 2.2 4.4
Max. peak value (V) 0.0977 0.1953 0.3906 0.7813 1.563 3.125 6.25 12.5
Overload protection       100 V permanently, 250 V for 1 s      
Input impedance       100 kΩ, 34 pF      
Earth capacitance       < 90 pF      
Isolation All current and voltage inputs are isolated against each other, against remaining electronics and against earth. Max. 1000 V / CAT III resp. 600 V / CAT IV
Synchronization Measurements are synchronized on the signal period. The period is determined based on „line“, „external“, u(t) or i(t), in combination  with configurable filters. Therefore readings are very stable, especially with PWM controlled frequency converters and amplitude modulated  electronic loads.
Scope function Graphical display of sample values over time in two scopes with 8 signals each
Plot function Two time (trend-) diagrams of max. 8 parameters, max. resolution 10 ms
External graphics interface (L6X1-OPT-DVI) DVI interface for external screen output
Harmonics at device level (L6-OPT-HRM) Harmonics and interharmonics up to 2,000th order, independant and simultaneously
CE Harmonics (L6-OPT-CE-HRM) According to EN 61000-4-7
Flicker (L6-OPT-FLK) According to EN 61000-4-15
LMG Remote LMG600 expansion software, basic module for remote configuration and operation via PC
LMG Test Suite LMG600 software for conformity tests according to:
IEC EN 61000-3-2 & 61000-3-12 for harmonics (LMG-TEST-CE-HRM)
IEC EN 61000-3-3 & 61000-3-11 for flicker (LMG-TEST-CE-FLK)
IEC 62301 & EN 50564 for standby power (LMG-TEST-CE-STBY)

The complete technical data can be found in the manual, which is stored on your LMG600 in the valid version.