EMS DATA ACQUISITION AND MANAGEMENT (LVDAM-EMS) MODEL 9062-C

Transcription

1 A Electric Power / Controls 2 kw EMS DATA ACQUISITION AND MANAGEMENT (LVDAM-EMS) MODEL 9062-C GENERAL DESCRIPTION The Lab-Volt Data Acquisition and Management for Electromechanical Systems (LVDAM-EMS), Model 9062, is a computer-based system for measuring, observing, and analyzing electrical and mechanical parameters in electric power systems and power electronics circuits. It allows training in various areas, such as electric power technology, AC/DC machines, and power electronics, using modern and versatile measuring instruments. The LVDAM-EMS system consists of a data acquisition interface (DAI) module and the Lab-Volt software Data Acquisition and Management for Electromechanical Systems (LVDAM-EMS). The LVDAM-EMS system is an add-on to several Lab-Volt systems, such as the 2-kW Electromechanical Training System, Model 8013, and the 2-kW Electric Power Transmission Training System, Model (732) / 800-LAB-VOLT, FAX: (732) , us@labvolt.com (418) / 800-LAB-VOLT, FAX: (418) , ca@labvolt.com INTERNET: http: //

2 EMS DATA ACQUISITION AND MANAGEMENT (LVDAM-EMS) MODEL 9062-C Data Acquisition Interface The Data Acquisition Interface (DAI) module consists of isolation and data acquisition units. The isolation unit converts high-level voltages and currents measured in electric power systems and power electronics circuits into low-level signals, and routes these signals to the data acquisition unit. The data acquisition unit converts the low-level signals into digital numbers (data) that are sent to the personal computer that runs the LVDAM-EMS software. The DAI module has isolated voltage and current inputs fitted with 4-mm banana safety jacks, which can be connected to AC or DC power circuits. Low-level inputs for speed measurement can be connected to the Speed Sensor / Tachometer, Model 8930, which provides output signals proportional to speed. Eight softwareprogrammable, low-level, auxiliary analog inputs allow measurement of additional circuit parameters. Two analog outputs, also software-programmable, allow direct control of the Power Electronics modules to which they are connected. All inputs and outputs are protected against wrong connections and overvoltage/overcurrent conditions. The user guide included with the DAI module provides detailed information about the module operation. Interconnection between the DAI module and the computer is made through a standard USB cable included with the module. LVDAM-EMS Software The LVDAM-EMS software consists of a set of conventional and specialized instruments that run on an IBM - compatible personal computer under the Microsoft Windows operating environment. Each instrument appears as a window on the computer screen. The conventional instruments include AC/DC voltmeters and ammeters, power meters, and an eight-channel oscilloscope. The specialized instruments include a six-channel phasor analyzer, a harmonic analyzer, a spectrum analyzer, speed, and six user-programmable meters. The LVDAM-EMS software is also provided with data-recording and graph-plotting facilities. The various instruments are briefly described in the next section of this datasheet. LVDAM-EMS INSTRUMENTS Metering The Metering window can include up to eighteen meters, which can be configured for measuring voltage and current, electrical power (active, reactive, and apparent), speed, etc. The voltage and current meters have several modes of operation that allow measurement of the mean (DC) value, RMS value, crest factor, RMS value of a particular harmonic (up to the 15 th ), RMS value of the harmonics, and total harmonic distortion (THD). Six of the eighteen meters are user-programmable for access to a larger variety of functions, allowing measurement of power factor, efficiency, impedance, frequency, energy, phase shift, etc. The arrangement (layout) of the meters in the Metering window can be customized by the user.

3 Data Table and Graph The values indicated by the various meters in the Metering window, as well as values measured by the other instruments in LVDAM-EMS, can be recorded in the Data Table window with a click of the mouse. The values recorded in the Data Table can be saved to a file (ASCIIformatted file). The recorded data can also be used to plot graphs by selecting which parameter(s) to plot in the Graph window. This allows lab results to be plotted quickly and easily. More sophisticated graphs can be created by exporting the contents of the Data Table window to any popular spreadsheet program, such as Microsoft Excel directly through the Windows Clipboard. Oscilloscope The Oscilloscope can display up to eight waveforms simultaneously. The waveforms are displayed using different colors to simplify identification. Each channel has independent vertical controls similar to those found on conventional oscilloscopes. An automatic scale-setting function allows the sensitivity of each channel to be set automatically according to the magnitude of the observed parameter. The time base and trigger controls are similar to those found on most oscilloscopes to simplify adjustment. The RMS value, average value, and frequency of each of the observed parameters can be displayed in a table in the Oscilloscope window. Two vertical cursors can be activated to perform precise measurements at particular points on the displayed waveforms. The Oscilloscope has two memories for saving the displayed waveforms.

4 EMS DATA ACQUISITION AND MANAGEMENT (LVDAM-EMS) MODEL 9062-C Phasor Analyzer The innovative Phasor Analyzer allows students to analyze AC power circuits with the phasors related to voltages and currents instead of the values and waveforms of these voltages and currents. Circuit voltages and currents can be monitored easily for relative amplitudes and phase differences simply by looking at their respective phasors on the Phasor Analyzer display. This produces a unique and dynamic display of the voltages and currents in a circuit (especially in three-phase circuits) that cannot be obtained with conventional instruments. The RMS value, phase angle, and frequency of the voltage or current related to each phasor is displayed in a table in the Phasor Analyzer window. Harmonic Analyzer The Harmonic Analyzer allows observation and analysis of the harmonic components in voltages and currents. The fundamental frequency can be set to the AC power network frequency, set manually by the user, or set automatically to the frequency of the fundamental component of the selected voltage or current. The number of harmonic components displayed can be varied between 5 and 40. The harmonic components of the selected voltage or current can be displayed using a vertical scale graduated in either absolute or relative values. Various vertical scale settings are available. A group of data displays in the Harmonic Analyzer indicates the values of the DC component, fundamental component, and harmonic components of the selected voltage or current, as well as the total harmonic distortion (THD). Vertical and horizontal cursors can be activated to perform precise measurements at particular points on the display.

5 Spectrum Analyzer The Spectrum Analyzer allows frequency-domain observation and analysis of voltages and currents. It is a frequency-selective instrument that measures the level of the frequency components in the selected voltage or current, and displays the results on a graduated screen. The vertical scale of the screen can be either linear or logarithmic. The center frequency is set manually or using the Seek function which searches for the next frequency component in the observed spectrum. Various frequency spans can be selected to display the observed frequency spectrum. Vertical and horizontal cursors can be activated to perform precise measurements at particular points on the frequency spectrum displayed on the graduated screen. The Spectrum Analyzer has two memories for saving frequency spectra.

6 EMS DATA ACQUISITION AND MANAGEMENT (LVDAM-EMS) MODEL 9062-C SPECIFICATIONS Model 9062 Data Acquisition Interface 120/208 V 60 Hz 220/380 V 50 Hz 240/415 V 50 Hz Voltage Inputs (3) Range (software programmable)!800 to +800 V,!200 to +200 V Frequency Bandwidth DC to 10 khz Accuracy 1% Isolation 750 V Current Inputs (3) Range (software programmable)!40 to +40 A,!4 to +4 A Frequency Bandwidth DC to 10 khz Accuracy 1% Torque Input Range user selectable through software Torque-to-Voltage Ratio user selectable through software Accuracy 0.1% of reading ±1 bit Speed Input Range user selectable through software Speed-to-Voltage Ratio user selectable through software Accuracy 0.1% of reading ±1 bit Auxiliary Analog Inputs (8) Voltage Range!10 to +10 V Type of Measured Parameter user selectable through software Parameter-to-Voltage Ratio user determined through software Accuracy 0.1% of reading ±1 bit Synchronization Input Level TTL Analog Outputs (2) Voltage Range!10 to +10 V A/D Converter Number of Multiplexed Channels 16 Resolution 12 bits Multiple-Channel Maximum Sampling Rate 180 ksamples/s D/A Converter Number 2 Resolution 12 bits USB Port Interconnection Cable Length 3.0 m Power Requirement 24 V 0.4 A 50/60 Hz Physical Characteristics Dimensions (H x W x D): Model x 287 x 440 mm (6.1 x 11.3 x 17.3 in) Model 9062-B 162 x 330 x 300 mm (6.4 x 13.0 x 11.8 in) Net Weight: Model kg (15.9 lb) Model 9062-B 5.0 kg (11.0 lb) LVDAM-EMS Software 120/208 V 60 Hz 220/380 V 50 Hz 240/415 V 50 Hz Metering Number of Meters 18 Sampling Window 250 ms or software adjusted (11.4 to 819 ms) Sampling Frequency (each meter) 3.84 khz or software adjusted Hz to 3.2 khz or software adjusted (625.3 Hz to 11.2 khz) 11.2 khz Display Type digital or analog, user selectable through software Oscilloscope Number of Channels 8 Vertical Sensitivity 2 V/div. to 200 V/div. Time Base 0.2 ms/div. to 10 s/div. Sampling Window 20 x selected time base Sampling Frequency 301 samples per measured parameter per horizontal sweep, up to a maximum of 180 khz

7 SPECIFICATIONS (cont'd) LVDAM-EMS Software (cont'd) 120/208 V 60 Hz 220/380 V 50 Hz 240/415 V 50 Hz Phasor Analyzer Sampling Window software adjusted (17.1 to 307 ms) Sampling Frequency (each phasor) software adjusted (1.667 to 30 khz) Harmonic Analyzer Fundamental-Frequency Range 1 Hz to 200 Hz Number of Harmonic Components 5 to 40, user selectable through software Vertical Scale (relative scale) 0.1%/div. to 10%/div. Sampling Window software adjusted (10 ms to 15 s) Sampling Frequency software adjusted (120 Hz to 180 khz) Spectrum Analyzer Frequency Range DC to 5 khz Frequency Resolution 1.22 Hz Frequency Span 20 Hz/div. to 1 khz/div. Sampling Window s Sampling Frequency 10 khz PERSONAL COMPUTER REQUIREMENTS A Pentium-type personal computer with USB port, running under one of the following Microsoft operating systems, Windows 98, Windows 2000, Windows Millennium, Windows XP or Windows Vista, is required. ORDERING NUMBERS 120/208 V 60 Hz 220/380 V 50 Hz 240/415 V 50 Hz ENGLISH FRENCH SPANISH ENGLISH FRENCH SPANISH ENGLISH 9062-C C C C C C C0 Table 1. Equipment Ordering Numbers

8 Reflecting Lab-Volt's commitment to high quality standards in product, design, development, production, installation, and service, our manufacturing and distribution facility has received the ISO 9001 certification. Lab-Volt reserves the right to make product improvements at any time and without notice and is not responsible for typographical errors. Lab-Volt recognizes all product names used herein as trademarks or registered trademarks of their respective holders. Lab-Volt All rights reserved