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Description
Zes Zimmer LMG671 – 1 to 7 Channel Power Analyser
In Power meters of traditional construction, a signal first passes through an analogue processing, the output values are digitised 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.
Wide range of Measurement Channels Available
Four types of measure channels to choose from – L60-CH-S S-Channel for high-precision broadband and DC-optimized measurements, L60-CH-A A-Channel for high-precision broadband measurements, L60-CH-B B-Channel for general purpose measurements and L60-CH-C C-Channel for high-precision measurements up to 10kHz.
- 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
- Modular configuration with 1 to 7 power measurement channels (alternatively 6 channels + 1 I/O card)
- Gapless sampling up to 18 bit and a minimal cycle time of 10 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 up to 7 different frequencies simultaneously
- 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 USB3.0, Gbit-LAN, RS-232 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
LMG600 Sensors User Manual
