Precision Power Analyzer Basic Accuracy 0.01% of reading Basic Power Accuracy Good Readability 0.02% of reading The Large, 8.4-inch LCD and the Range Indicator LEDs Simultaneous Measurement with 2 Units (8 Power Input Elements) Store Function Interface 50 ms Data Storing Interval GP-IB, Ethernet, RS-232 and USB Advanced Computation Function Waveform Computation, FFT Analysis, Waveform sampling Data Saving IEC61000-3-2 Harmonic Measurement IEC61000-3-3 Voltage Fluctuation/ Flicker Measurement * As of February 2007, for power meter accuracy in three-phase power meter (as investigated by Yokogawa). (WT3000) Bulletin 7603-00E www.yokogawa.com/tm/ High-end Power Meter with top precision* Basic Power Accuracy: 0.02% of reading Visit our website to sign up for email updates. Precision Power Analyzer WT3000 WT3000 Precision Power Analyzer WT3000 Yokogawa’s power measurement technology provides best-in-class*1 precision and stability Better Efficiency in Power Measurements APEX Basic Power Accuracy: ±0.02% With basic power accuracy of ± 0.02% of reading, DC and 0.1 Hz–1 MHz measurement bandwidths, and up to four input elements, the WT3000 provides higher-accuracy measurement for inverter I/O efficiency. In developing the WT3000, Yokogawa focused on improving efficiency in two basic areas. One goal was to obtain highly precise and simultaneous measurements of the power conversion efficiency of a piece of equipment. The other objective was to improve equipment evaluation efficiency by making simultaneous power evaluations and tests easier and faster. Select the model most suited to your measurement needs. Standard Version 夹High Accuracy and Wide Frequency Range New Innovations to Enhance the Reliable Measurement Technology With the WT3000, we made further improvements to the basic performance specifications for even better functionality and reliability. We are confident users will appreciate these improvements to power and efficiency measurements thanks to the new power control technologies we have introduced. Basic Power Accuracy ±(0.02% of reading + 0.04% of range) Frequency Range DC, 0.1 Hz to 1 MHz 夹Low Power Factor Error Power factor influence when cosø=0 0.03% of S S is reading value of apparent power ø is phase angle between voltage and current 夹Current Range A Variety of External Interface Choices The WT3000 is the first model in the WT Series which is standardequipped with a PC card slot (ATA flash card slot). The WT3000 is also standard-equipped with a GP-IB port. In addition, a serial (RS-232) port, Ethernet port, USB port for peripheral, and USB port for connection to PC are available as options. The variety of interface choices allows customers to use the best interfaces for a wide variety of equipment, media, and network environments. More Precise. More Bandwidth. More Features.*2 • The WT3000 is a truly innovative measurement solution, combining top-level measurement accuracy with special functions. *2 • The large, 8.4-inch liquid crystal display and the range indicator LEDs ensure good readability and make the system easy to use. The WT3000 is the answer to your measurement problems. Have you had problems or questions such as these? • When working with efficiency-improvement evaluation data for a high-efficiency motor, improvements cannot be seen unless measurements are taken with very high precision. • Measurement efficiency is poor during power measurements and power supply quality measurements. For answers to these questions, see page 6. Yokogawa’s highest-precision power meter *2 The WT3000 has the highest precision of the Yokogawa power meters in the WT Series. The models in the WT Series are designed to meet a wide variety of user needs. The WT200 Series is a high price-performance series which is very popular in production line applications. The WT1600 allows measurement data to be viewed in a variety of ways, including numerical value display, waveform display, and trend display capabilities. WT3000 ±0.02% Features Voltage range Current range External sensor range Frequency power range Crest factor Display 4 input elements Standard feature Option Inputs Basic Power Accuracy Normal harmonics Wideband harmonics IEC harmonics FET computation Waveform computation Data updating interval Delta calculation Frequency measurement Internal Memory USB memory Motor evaluation WT1600 As fast as 50 ms Sampling data saving Cycle Fricker PCcard slot ±0.10% Printer Software (sold separately) WT210/WT230 DAoutput VGA Comm Comm Comm Comm USB 2 Software Software Software ±0.10% Direct Input 0.5/1/2/5/10/20/30 [A] * 5m/10m/20m/50m/100m/200m/500m/1/2 [A] * External Input 50m/100m/200m/500m/1/2/5/10 [V] * 夹Voltage Range 15/30/60/100/150/300/600/1000 [V] * * Voltage range and current range are for crest factor 3 夹Continuous Maximum Common Mode Voltage (50/60 Hz) 1000 [Vrms] 夹Data Update rate: 50 ms to 20 sec 夹Effective input range: 1% to 130% 夹Simultaneous measurement with 2 Units 夹Standard PC Card Slot 夹Storage Function (Approximately 30MB internal memory) Motor Version In addition to the functions of the standard version, the models offer powerful motor/inverter evaluation functions. 夹Motor Efficiency and Total Efficiency Measurement Analog or pulse signal from rotating sensor and torque meter can be input, and allows calculation of torque, revolution speed, mechanical power, synchronous speed, slip, motor efficiency, and total efficiency in a single unit. *1 As of February 2007, for power accuracy in a three-phase power meter (as investigated by Yokogawa) *2 As compared to Yokogawa’s products *reading error 3 Precision Power Analyzer WT3000 FUNCTIONS 䉴 WT3000 Controls: Simple to Use, Easy to View The WT3000 was designed with user-friendly functions and controls in response to user requests for a simpler range setting operation and more user-friendly parameter setting display process. Simpler range settings Item pages make it easy to set the data you want to view for each experiment Range settings using direct key input Using item pages to set display preferences The range indicator on the WT3000 is a seven-segment green LED, so the set range can be monitored at all times. The range can easily be switched using the up and down arrows. The WT3000 has nine numeric item pages for displaying measurement values. Once you set the measurement parameters you want displayed on a particular item page, you can easily switch between entire groups of displayed parameters. Easily switch between multiple item pages 䉴 A wide range of standard functions Formats for viewing waveforms as well as numerical values A Variety of display formats User-defined function The WT3000 lets you display input signal waveforms in addition to numerical value data. This means you don’t need to connect a special waveform analyzer just to check signal waveforms.*1 In addition, the optional advanced computation function lets you display vectors and bar graphs for enhanced visual presentation. *1 Waveforms up to approximately 10 kHz can be displayed accurately. *2 Excludes single phase model. As many as twenty user-defined formulas can be set in the WT3000. These equations can be used to calculate various parameters, such as mean active power (see “A variety of integration functions” below). An easier way to input efficiency calculation formulas Efficiency calculation function This function can be used to set up to four efficiency calculation formulas. Apparent power integration and reactive power integration Vector display*2 High-speed measurement to capture rapid data fluctuations 50ms data updating intervals Fast updating allows you to precisely capture rapidly changing transient states in the measurement subject. * The WT3000 switches between two different calculation systems depending on the data updating interval. See page 19 for details. Compensates for the loss Compensation functions This function compensates for the loss caused by the wiring of each element. The WT3000 has the following three types of correction functions to measure the power and efficiency. • Wiring Compensation This function compensates for the loss caused by the wiring of each element. • Efficiency Compensation The power measurement on the secondary side of a power transformer such as an inverter includes loss caused by the measurement instrument. This loss appears as error in the efficiency computation. This function compensates for this loss. • Compensation for the Two-Wattmeter Method* In the two-power wattmeter method, an error results when current flows through the neutral line. This function computes the currents that flows through the neutral line for measurements using the two-wattmeter method with a threephase, three wire (3V3A) system and adds the compensation value to the measured power. *Requires the delta computation option (/DT). Storing measurement data* Store Function Voltage, current, power, and other measured data can be stored to the unit’s approximately thirty megabytes of internal memory. These data can be saved in binary or ASCII format on a PC card or USB memory *. *requires the /C5 option A Variety of integration functions • Active power, current, apparent power, reactive power In addition to the active power integration function (WP) and current integration function (q) included in earlier models, the WT3000 also has a new apparent power integration function (WS) and reactive power integration function (WQ). • A wide effective input range for high-precision integration The WT3000 has a wide effective input range, from 1% to 130% of the measurement range. • Average active power (using user-defined settings) Average active power can be calculated over an integration interval. This feature is useful for evaluating the power consumed by intermittent-control instruments in which the power value fluctuates. Average active power = Integrated power (WP) Integrated elapsed time (H) Instantaneous power value Power value Trend display 4 A way to add user-defined measurement parameters Time Average active power value OPTIONS 䉴 A wide variety of optional functions make it easy to perform sophisticated power evaluations. When you purchase a WT3000 from Yokogawa, you get to select just the options you need. This approach lets you maximize performance at a lower cost. Checking harmonic components and total harmonic distortion (THD) Advanced Computation (/G6) Output graphics at the touch of a button Built-in printer (/B5) The advanced calculation function (/G6 option) meets these measuring needs with advanced, powerful features for making power analysis measurements more efficient. • Harmonic Measurement in Normal Measurement Mode You can measure harmonic data while in normal measurement mode. This is effective for observing values from normal measurements and harmonic data at the same time. • Wide Bandwidth Harmonic Measurement This dedicated harmonic measurement function is distinct from the harmonic measurements that can be taken in normal measurement mode. The function is useful for ascertaining the distortion factor and harmonic components in strain measurements of fundamental frequencies from 0.1 Hz to 2.6 kHz. It allows wide bandwidth measurements of signals that include high frequency waves, such as from power supplies and acceleration of motor revolution. • Waveform Computation You can perform computations on measured waveforms, and display power (instantaneous voltage × instantaneous current) and other waveforms on screen. • FFT You can analyze and display a waveform’s individual frequency components. You can also check signal components other than the integer multiples of the fundamental wave. • Waveform Sampling Data Saving You can save sampling data of input waveforms, waveform computations, and FFT computations. The data is available for any kind of computation by PC software. The optional built-in printer is installed on the front side of the WT3000, so it is easy to use even if the WT3000 is mounted on a rack. The printer can be used to print data and waveform memos. Capturing cycle-by-cycle fluctuations Cycle by Cycle Measurement (/CC) The function takes measurements of parameters such as voltage, current, and active power for each cycle, then lists the data on screen in a time series. Input frequencies from 0.1 Hz to 1000 Hz can be measured. Up to 3000 data can be saved in CSV format. Also, with the WTViewer software (model 760122, sold separately), data can be displayed in graphs by cycle. Measurement data display Checking the frequencies of all inputs Added Frequency Measurement (/FQ) Input signal and FFT data In addition to the standard two channels of frequency measurement, a six-channel frequency measurement option is also available. This option provides frequency measurement of voltage and current on all eight channels (with input elements 1 through 4 installed). This is necessary when you want to measure voltage and current frequency from the instrument’s I/O as well as voltage and current frequencies of multiple items under test at the same time. Input signal and power waveform Performing IEC harmonic standards tests IEC harmonic measurement mode (/G6) Outputting measurement values as analog signals Harmonic measurement software* can be used in this dedicated mode for harmonic measurement that supports international standards. This allows confirmation of whether or not home electronics, office automation equipment, or other devices conform with harmonic standards. * IEC standard compliant harmonic measurement requires the model 761922 harmonic measurement software. Voltage Fluctuation and Flicker Measurement (/FL) Enables voltage fluctuation/flicker measurement conforming to IEC61000-3-3. The following values related to voltage fluctuation that are stipulated by the IEC610003-3 standard can be calculated from the measured data: dc (relative steady-state voltage change), dmax (maximum relative voltage change), dt (relative voltage change time), short-term flicker value Pst, long-term flicker value Plt, instantaneous flicker sensation, and others. In this mode, you can judge whether voltage fluctuations in the item under test relative to a specified minimum value are within the standard. * The flicker test can also be performed with the WT3000 alone. Using the model 761922 harmonic/flicker measurement software (sold separately), you can display trend graphs, CPF graphs, or reports of the dc, dmax, and IFS (instantaneous flicker sensation) values in addition to the WT3000 judgment results. * The range is 0V to 5V for some functions, such as frequency measurement. Video output for viewing on a larger screen VGA output (/V1) The VGA port can be used to connect an external monitor in order to view numerical value data and waveforms on a larger screen. This capability is useful if you want to simultaneously check large amounts of data on a separate screen, or view data in a separate location. USB Port (Peripheral) Option (/C5) Checking phase voltage when you measure line voltage Delta Calculation (/DT) You can save voltage, current, power, and other kinds of data that are stored in the WT3000 to a USB Memory. The data can be saved in binary or ASCII format. You can also connect a keyboard for easy input of user-defined math expressions. This function allows you to calculate individual phase voltages from the line voltage measured in a three-phase, three-wire (3V3A) system. R-S line voltage can be calculated in systems measured from a three-phase, three-wire method (using two elements). This is useful when you want to determine the phase voltage in motors and other items under test with no neutral lines. Note: This function cannot be used for products with only one element. D/A Output (/DA) • 20 Channels Measured values and calculated value by user-defined function can be output as ± 5V FS DC voltages from the D/A output connector on the rear panel. • D/A zoom This function allows the any input signal range to be scaled to between -5V and 5V* in the D/A output as Upper and Lower ranges. This makes it possible to enlarge input signal fluctuations for observation using a recorder or logger. R phase T phase S phase Note: When taking measurements that incorporate measuring instrument options, certain functions, displays, and measuring functions may be limited depending on the measurement mode. For example, waveform and FFT computations may not be used simultaneously. 5 Precision Power Analyzer WT3000 Variety of Communication Functions (GP-IB Comes Standard) USB Port (PC) Option (/C12) * Select USBport (PC) or RS-232 The USB port (type B connector) on the rear panel of the WT3000 allows data communications with a PC1. 1. USB driver required for USB communications. A USB driver is available from our Web site. Ethernet port (/C7) The optional Ethernet port (100BASE-TX/10BASE-T) allows you to connect the WT3000 to a LAN. Once connected, images and numerical value data saved on the WT3000 can be transferred to a PC using FTP server software or other utilities. Serial (RS-232) (/C2) * Select USBport (PC) or RS-232 APPLICATIONS Measurement Applications to Utilize WT3000’s Capabilities Measurement of Inverter Efficiency • Measuring Efficiency with High Precision: Simultaneous Measurement of Input and Output The WT3000 offers up to four input elements capable of simultaneous measurement of single-phase input/three-phase output, or three-phase input/three-phase output. • Accurate Measurement of Fundamental PWM Voltage Motor drive technology has become more complex in recent years; pure sinewavemodulated PWM is less common, and cases in which the voltage mean differs greatly from the fundamental voltage waveform arise frequently. With the optional harmonic measurement function of the WT3000, accurate measurements of commonly measured values such as active power and the fundamental or harmonic components can be taken simultaneously without changing measuring modes. • High Frequency and Harmonic Measurements (Requires the /G6 Option) The fundamental frequencies of motors have become faster and faster. The WT3000 allows harmonic measurements of signals with fundamental frequencies as high as 2.6 kHz. • Evaluation of Torque Speed Characteristics (Requires motor version, the /CC Option) Torque speed can be evaluated based on the torque and revolution speed data measured with the motor version. Also, you can confirm the cycle-by-cycle voltage, current, and power fluctuations that occur such as when starting the motor. • Phase Voltage Measurement without a Neutral Line (/DT option) With the delta computation function, an object under test without a neutral line can be measured in a three-phase three-wire (3V3A) configuration, allowing calculation of each phase voltage. inverter input signal output signal You can take measurements in excess of 30 A by using a 2 A input element together with the model 751574* current transducer. *See page 10 of the specifications. When measuring three-phase input/three-phase output with a three-phase four-wire system, you can measure input and output simultaneously by synchronizing between two units. 6 motor load torque and speed meter trend display of torque and rpms (requires motor version) • Related applications Power conversion technologies such as those used in EVs and power conditioners High-precision, simultaneous measurements are required in measuring conversion efficiency in the conversion of a converter's three-phase input to a DC bus, and the conversion from an inverter's DC bus to three-phase output. Evaluation of Lighting Devices High Accuracy Measurements of Transformers • Simultaneous Measurement of Voltage, Current, and THD (Total Harmonic distortion) Testing of lighting devices often involves measurement of voltage, current, and THD, a parameter that indicates the quality of power. This is because distortion in voltage and current waveforms is becoming more prevalent due to the increasing complexity of control systems. The WT3000 can simultaneously measure voltage and current with THD, eliminating these inconveniences and allowing for more accurate and rapid measurements of an instrument’s characteristics and fluctuations. • High Accuracy Even at Low Power Factors The WT3000 represents great improvement over previous models in terms of power factor error (it is approximately three times more accurate). With improved measurement accuracy in the lower power factors—such as with transformers, active power values can be measured with higher precision. • Simultaneous Measurement of RMS and MEAN of Voltage Voltage RMS (the true RMS value) and voltage MEAN (rectified mean value calibrated to the rms value) can be measured at the same time, allowing for measurement of corrected power (Pc). • Phase Voltage Confirmation V A Measuring Conversion Efficiency of Power Conditioner Flourescent lamp V Ballast The delta computation function (/DT option) allows both star-delta and delta-star conversion. • Conversion Efficiency Measurement V Renewable energy source of photovoltaic power generation and wind power is converted dc to ac using power conditioner. The WT3000 Precision Power Analyzer provides measurement with world-class DC and AC signal accuracies. DC100V to 250V A DC300V AC100V A Secondary current booster converter Cathode current * THD stands for total harmonic distortion. In other words, the distortion factor. * Please be aware that during lighting testing, the measured values and efficiencies may not be stable since the power conversion efficiency fluctuates over time due to the emission of heat. Lamp Current Measurement Since lamp current flows inside of fluorescent tubes, normally it cannot be measured directly. However, lamp current can be displayed by measuring secondary current and cathode current and finding the difference in their instantaneous values using the delta computation function (/DT option). DC/AC converter Load Solar cell module Power Link Example of Overview of a Photovoltaic Power Conditioner • Related applications Evaluation of power quality in equipment designed to be connected in a system, such as UPSs and power conditioners Measurement of Power Consumption in Mobile Phones You can measure power consumption in mobile phones, batteries, and other equipment powered by dry cells. You can perform a variety of operation tests for reducing power consumption by using the current or power integration function. This offers a powerful means of evaluating instruments, such as for checking control modes for lengthening battery life. Major Features • 5mA range for very low current measurements • Checking power consumption integration of mobile phones when switching modes (using integration functions) • Visually observing trends in power consumption using trend display functions that allow checking of temporal fluctuations • Checking the waveform of the consumed current • Null function can be used to subtract the DC offset Use the 2A input element for small current consumption. Measure the DC voltage, DC current, and power conversion efficiency Since images can be saved, they can be pasted as-is into reports as evaluation and test data. Reference equipment for power calibration • Basic power accuracy of ±0.02% of reading The WT3000 can be used as a reference instrument for periodic in-house calibration of general-purpose power measurement instruments, such as the WT210 and WT230. Temperature- and humidity-controlled calibration room Example of integration graph display Current consumption in mobile phones 7 Precision Power Analyzer WT3000 SOFTWARE Utility Software WTViewer 760122 WTFileReader (free) WTViewer is an application software tool that reads numeric, waveform, and harmonic data measured with the WT3000 Precision Power Analyzer. Communications:GP-IB, Serial (RS-232, /C2), USB(/C12), or Ethernet (/C7) • Numeric Data • Measuring Harmonics* WTViewer can simultaneously display voltage, current, power and various other measured parameters for one to four elements individually, and for ∑A and ∑B calculations. WTViewer can numerically or graphically display the results of measured harmonics up to the 100th order for such parameters as voltage, current, power and phase angle. • Waveform • Viewing Trends Voltage and current waveforms can be monitored on the PC screen. You can confirm the voltage-current phase difference, waveform distortion, and other phenomena. You can capture and view various data, measured with the WT3000 on your PC in a graphical trend format. This feature lets you monitor power supply voltage fluctuations, changes in current consumption and other time-based variations. WT1600/WT3000 File Reader Software (off-line) WTFileReader software can load and display data measured by the WT3000 Precision Power Analyzer or WT1600 Digital Powermeter that has been saved to a memory medium. That data can also be saved in CSV format. * requires / G6 option Can be downloaded free from our Web site: http://www.yokogawa.com/tm/wtpz/wtfree/tm-wtfree_04.htm WTFileReader (free) You can download this software program from our web site * LabVIEW is a registered trademark of National Instruments Corporation. Harmonic Measurement / Voltage Fluctuation and Flicker Measurement Software (761922) • Harmonic Measurement (/G6 option) The Harmonic Analysis Software (Model 761922) loads data measured by the WT3000 and performs harmonic analysis that complies with IEC61000-3-2 edition 2.2. You can use the model 761922 harmonic measurement software to perform harmonic measurement tests conforming to IEC 61000-4-7 edition 2 (window width is 10 cycles of 50 Hz and 12 cycles of 60 Hz) with WT3000. Communications: GP-IB, Ethernet (/C7) Harmonic Current Measurement Value List and Bar Graph Enables PASS/FAIL evaluations of harmonic measurement results in line with standard class divisions (A, B, C, D). Displays lists of measurement values, as well as bar graphs that let you compare the measured value and standard limit value for each harmonic component. Measurement Mode Three modes are available for harmonic measurement. • Harmonic observation: Lets you view current, voltage, and phase angle for each order in a bar graph. • Waveform observation: Lets you view measured signals to confirm the suitability of the range and other factors. • Harmonic measurement (standards testing): For conducting standards tests and making the associated judgments. Efficiency is gained by performing tests after checking the waveform in Observation mode. Harmonic bar graph display in harmonic observation mode • Flicker Measurement (/FL option) This function enables voltage fluctuation and flicker measurements in compliance with EN61000-3-3 (Ed1:1995). Low distortion power supply Tested product * The flicker test can also be performed with the WT3000 alone. Using the model 761922 harmonic/flicker measurement software (sold separately), you can display trend graphs, CPF graphs, or reports of the dc, dmax, and IFS (instantaneous flicker sensation) values in addition to the WT3000 judgment results. Note) This software cannot communicate with the WT using a serial (RS-232) interface (/C2) or USB port (PC) (/C12). 8 REAR PANEL 䉴 Rear Panel Standard features Optional features Voltage input terminals Current external sensor input terminals Current direct input terminals GP-IB port BNC connector for two-system synchronized measurement Serial (RS-232) port (option/C2) or USB port (PC) (option/C12) Ethernet port(100BASE-TX/10BASE-T) (option/C7) VGA port (option/V1) D/A output (option/DA) Torque and speed input terminals (motor version) CHARACTERISTICS 䉴 Example of basic characteristics showing the WT3000’s high precision and excellent stability Total power error with rated range input for an arbitrary power factor (50/60Hz, 30A input element) Example of frequency versus power accuracy characteristic 20 1.000% 15 100 V/5A range WT2000 Total Error (% of range) Error (% of reading) 10 5 0.0 –5 –10 0.100% WT3000 0.010% –15 –20 10 100 1,000 10,000 Frequency (Hz) 100,000 0.001% 1,000,000 0.01 0.1 1 Power factor Example of frequency characteristic Effect of common mode voltage on reading value 15 10 100 V/5A range 10 8 5 Error (% of range) Error (% of range) 0.01 0 -5 6 15 V range 500 mA range 4 2 0 -10 –2 -15 10 100 1,000 10,000 Frequency (Hz) 100,000 1,000,000 1 10,000 Frequency (Hz) 100,000 9 Precision Power Analyzer WT3000 ACCESSORIES 䉴 Related products Current Sensor Unit Current Transducer Current Clamp on Probe 758917 758921 751521,751523 Current Output Current Sensor Unit DC to 100kHz/600Apk • Wide dynamic range: -600 A to 0 A to +600 A (DC)/600 A peak (AC) • Wide measurement frequency range: DC to 100 kHz (-3 dB) • High-precision fundamental accuracy: ±(0.05% of rdg + 40 µA) • Superior noise withstanding ability and CMRR characteristic due to optimized casing design *751521/751523 do not conform to CE Marking 751574 Current Output Current Transducer DC to 100 kHz/600Apk • Wide measurement frequency range: DC and up to 100 kHz (-3 dB) • High-precision fundamental accuracy: ±(0.05% of reading + 40 µA) • Wide dynamic range: 0-600 A (DC)/600 A peak (AC) • ±15 V DC power supply, connector, and load resistor required. For detailed information, see Power Meter Accessory Catalog Bulletin 7515-52E. For detailed information, see Power Meter Accessory Catalog Bulletin 7515-52E. 751552 Current Output Current Clamp on Probe AC1000Arms (1400Apeak) • Measurement frequency range: 30 Hz to 5 kHz • Basic accuracy: ±0.3% of reading • Maximum allowed input: AC 1000 Arms, max 1400 Apk (AC) • Current output type: 1 mA/A A separately sold fork terminal adapter set (758921), measurement leads (758917), etc. are required for connection to WT3000. For detailed information, see Power Meter Accessory Catalog Bulletin 7515-52E. Adapters and Cables 758917 758922 758929 758923*1 758931*1 758921 Measurement leads Small alligator adapters Large alligator adapters Safety terminal adapter set Safety terminal adapter set Fork terminal adapter Two leads in a set. Use 758917 in combination with 758922 or 758929. Total length: 75 cm Rating: 1000 V, 32 A For connection to measurement leads (758917). Two in a set. Rating: 300 V For connection to measurement leads (758917). Two in a set. Rating: 1000 V (spring-hold type) Two adapters in a set. Screw-fastened adapters. Two adapters in a set. 1.5 mm Allen wrench included for tightening. Two adapters (red and black) to a set. Used when attaching banana plug to binding post. Due to the nature of this product, it is possible to touch its metal parts. Therefore, there is a risk of electric shock, so the product must be used with caution. 701959 366924/25*2 B9284LK*3 Safety mini-clip set (hook Type) Conversion adapter 758924 BNC cable External Sensor Cable 2 pieces (red and black) in one set. Rating 1000V (BNC-BNC 1m/2m) For connection the external input For connection to simultaneously of the WT3000 to current sensor. measurement with 2 units, or for Length:50cm input external trigger signal. For conversion between male BNC and female banana plug *1 Maximum diameters of cables that can be connected to the adapters 758923 core diameter: 2.5 mm or less; sheath diameter: 4.8 mm or less 758931 core diameter: 1.8 mm or less; sheath diameter: 3.9 mm or less *2 Use with a low-voltage circuit (42V or less) *3 The coax cable is simply cut on the current sensor side. Preparation by the user is required. Connecting Diagram Connecting the Measurement Cables and Adapters Equipment under voltage measurement Connecting Diagram for Current Transducer Equipment undercurrent measurement 701959 751574 Connector B8200JQ Load resistors B8200JR (4 in parallel) Current Input Terminal of The Power Meter Connecting Diagram for Clamp-on Probe Equipment under current measurement EXT Input Terminal of The Power Meter 758917 758921 758921 751552 758917 758922 DC source 758923 758929 Voltage Input Terminal of the Power Meter Product Part no. Specifications Output connector B8200JQ D-SUB 9-pin, with 2 screws 758931 Order quantity 1 10 Ω, 0.25 W × 4 Load resistors B8200JR Connect 4 in parallel to set resistance to 2.5 Ω. 10 Current output Accessories (sold separately) 1 Current Input Terminal of The Power Meter * Don’t connect and use the current input terminal and EXT terminal simultaneously. SUPPORTS Crest Factor 6 The crest factor is the ratio of the waveform peak value and the RMS value. waveform peak RMS value waveform peak RMS value Crest factor = (CF, peak factor) When checking the measurable crest factor of our power measuring instruments, please refer to the following equation. {measuring rangeCF setting (3 or 6)} measured value (RMS) Crest factor (CF) = * However, the peak value of the measured signal must be less than or equal to the continuous maximum allowed input * The crest factor on a power meter is specified by how many times peak input value is allowed relative to rated input value. Even if some measured signals exist whose crest factors are larger than the specifications of the instrument (the crest factor standard at the rated input), you can measure signals having crest factors larger than the specifications by setting a measurement range that is large relative to the measured signal. For example, even if you set CF = 3, CF5 or higher measurements are possible as long as the measured value (RMS) is 60% or less than the measuring range. Also, for a setting of CF = 3, measurements of CF = 300 are possible with the minimum effective input (1% of measuring range). Comparison of Specifications and Functions in WT3000, Other WT Series Models, and PZ4000 Basic power accuracy (50/60 Hz) Measurement power bandwidth Input elements WT3000 WT2000 WT1600 PZ4000 0.02% of reading + 0.04% of range 0.04% of reading + 0.04% of range 0.1% of reading + 0.05% of range 0.1% of reading + 0.025% of range DC, 0.1 Hz to 1 MHz DC, 2 Hz to 500 kHz (voltage, current) DC, 2 Hz to 300 kHz (power) DC, 0.5 Hz to 1 MHz DC, 0.1 Hz to 1 MHz 1, 2, 3, 4 1, 2, 3 1, 2, 3, 4, 5, 6 15/30/60/100/150/300/600/1000[V] (when crest factor is 3) Voltage range 7.5/15/30/50/75/150/300/500[V] (when crest factor is 6) Select from 0.5/1/2/5/10/20/30[A] or Range Direct input Current range Select from 0.25/0.5/1/2.5/5/10/15[A] or Guaranteed accuracy range for voltage and current ranges 50m/100m/200m/500m/1/2/5/10[V] (when crest factor is 3) 25m/50m/100m/250m/500m/1/2.5/5[V] (when crest factor is 6) 1% to 130% 30/60/120/200/300/600/1200/2000[Vpk] 750m/1.5/3/5/7/5/15/30/50/75/150/300/500[V] (when crest factor is 6) or 1/2/5/10/20/50[A] (when crest factor is 3) 5m/10m/25m/50m/100m/250m/500m/1/2.5[A] 5A module: 0.1/0.2/0.4/1/2/4/10[Apk] (5Arms) 20A module: 0.1/0.2/0.4/1/2/4/10[Apk] (5Arms) 1/2/4/10/20/40/100[Apk] (20Arms) or 0.5/1/2.5/5/10/25[A] (when crest factor is 6) 50m/100m/200m[V] (for crest factors 3 and 6) 10% to 130% 50m/100m/250m/500m/1/2.5/5/10[V] (when crest factor is 3) 0.1/0.2/0.4/1[Vpk] 25m/50m/125m/250m/500m/1.25/2.5/5[V] (when crest factor is 6) 5% to 70% 1% to 110% Voltage, current, active power, reactive power, apparent power, power factor, phase angle, peak voltage, peak current, crest factor Main measurement parameters Peak hold (instantaneous maximum value hold) ✓ ✓ ✓ MAX hold ✓ ✓ ✓ Voltage RMS/MEAN simultaneous measurement ✓ (custom-made) ✓ ✓ RMS/MEAN/AC/DC simultaneous measurement ✓ (ASSP) ✓ ✓ ✓ (user-defined function) ✓(user-defined function) Mean active power Active power amount (WP) Measurement Apparent power amount (WS) parameters Reactive power amount (WQ) ✓ ✓ ✓ ✓ ✓ Frequency 2 channels (up to 8 channels with option /FQ) One from voltages or currents on installed input elements Up to three from voltages or currents on installed input elements All installed voltages and currents (up to 8 channels) Efficiency ✓ ✓ ✓ ✓ Phase angle between phases (fundamental wave) Motor evaluation (/G6)(opt.) ✓ ✓ Torque, rotating speed input (motor version)(opt.) Torque and rotational velocity input(opt.) Torque and rotational velocity input (requires sensor input module 253771)(opt.) ✓ (4) ✓ (4) ✓ FFT spectral analysis (/G6)(opt.) User-defined functions ✓ (20 functions) Voltage, current, power 600,000 50,000 60,000 99,999 or 999,999 Power amount, current amount 999,999 500,000 999,999 No integration function 99,999 199,999 99,999 99,999 8.4-inch TFT color LCD 7-segment display 6.4-inch TFT color LCD 6.4-inch TFT color LCD Numerical values, waveforms, trends, bar graphs, vectors Numerical values (4 values) Numerical values, waveforms, trends, bar graphs, vectors Numerical values, waveforms, trends, bar graphs,vectors, X-Y Approximately 200 kS/s Approximately 110 kS/s Approximately 200 kS/s Maximum 5 MS/s Harmonic measurement (/G6)(opt.) (opt.) ✓ ✓ Harmonic measurement in normal measurement mode (/G6)(opt.) IEC standards-compliant harmonic measurement (/G6)(opt.)(10cycle/50Hz, 12cycle/60Hz) (opt.)(16cycle) (/FL)(opt.) (opt.) ✓(diff are not supported) ✓ Frequency Display Display 1/2/5/10/20/30 [A] (for crest factors 3 and 6) 1, 2, 3, 4 1.5/3/6/10/15/30/60/100/150/300/600/1000[V] (when crest factor is 3) Select from 10m/20m/50m/100m/200m/500m/1/2/5[A] 5m/10m/20m/50m/100m/200m/500m/1/2 [A] (when crest factor is 3) 2.5/5m/10m/25m/50m/100m/250m/500m/1 [A] (when crest factor is 6) External sensor input Display resolution 10/15/30/60/100/150/300/600[V] (for crest factors 3 and 6) Display format Sampling frequency Flicker measurement Measurement/ Cycle by cycle measurement functions Compensation function Delta calculation function DA output Synchronized operation (/CC)(opt.) ✓ (/DT)(opt.) 20 channels (/DA)(opt.) 14 channels 30 channels(opt.) ✓ ✓ ✓ None, but acquisition memory has 100 kW/channel Storage (internal memory for storing data) Approximately 11MB approximately 30MB (up to 4 MW/channel can be installed with option) Other features Interfaces GP-IB; RS-232 (/C2)(opt.); USB (/C12) VGA output (/V1)(opt.); Ethernet (/C7)(opt.) Communication command compatibility Communication command standards Data updating interval Removable storage Printer GP-IB or RS-232; GP-IB; RS-232; SCSI(opt.); Ethernet(opt.); VGA output Centronics; SCSI(opt.) GP-IB or RS-232 None (communication commands vary from product to product) Commands in IEEE488.2 standard IEEE standard 488.2 or earlier command system and IEEE488.2 commands Commands in IEEE488.2 standard Commands in IEEE488.2 standard 50m/100m/250m/500m/1/2/5/10/20[S] 250m/500m/2[S] 50m/100m/200m/500m/1/2/5[S] Depends on waveform acquisition length and calculations FDD FDD Built-in printer (front side)(opt.) Built-in printer (front side)(opt.) Built-in printer (top side)(opt.) PC card interface; USB (/C5)(opt.) Built-in printer (front side) (/B5)(opt.) There are limitations on some specifications and functions. See the individual product catalogs for details. (opt.):Optional 11 Precision Power Analyzer WT3000 WT3000 SPEC WT3000 Specifications Inputs Item Input terminal type Specification Voltage Plug-in terminal (safety terminal) Current • Direct input: Large binding post • External sensor input: Insulated BNC connector Input type Voltage Floating input, resistive potential method Current Floating input, shunt input method Measurement range Voltage (rated value) 15 V, 30 V, 60 V, 100 V, 150 V, 300 V, 600 V, 1000 V (for crest factor 3) 7.5 V, 15 V, 30 V, 50 V, 75 V, 150 V, 300 V, 500 V (for crest factor 6) Current (2A input element) • Direct input: 5mA, 10mA, 20mA, 50mA, 100mA, 200mA, 500mA, 1A, 2A (for crest factor 3) 2.5mA, 5mA, 10mA, 25mA, 50mA, 100mA, 250mA, 500mA, 1A (for crest factor 6) • External sensor input: 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, and 10 V (for crest factor 3) 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, and 5 V (for crest factor 6) Current (30A input element) • Direct input: 500 mA, 1 A, 2 A, 5 A, 10 A, 20 A, and 30 A (for crest factor 3) 250 mA, 500 mA,1 A, 2.5 A, 5 A, 10 A, and 15 A (for crest factor 6) • External sensor input: 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, and 10 V (for crest factor 3) 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, and 5 V (for crest factor 6) Input impedance Voltage Input resistance: Approx. 10 MΩ, input capacitance: Approx. 5 pF Current (2A input element) • Direct input: Approx. 500 mΩ + approx. 0.07 µ H • External sensor input: Input resistance: Approx. 1 MΩ, input capacitance: Approx. 40 pF Current (30A input element) • Direct input: Approx. 5.5 mΩ + approx. 0.03 µ H • External sensor input: Input resistance: Approx. 1 MΩ, input capacitance: Approx. 40 pF Instantaneous maximum Voltage allowable input Peak value of 2500 V or RMS value of 1500 V, whichever is less. (1s or less) Current (2A input element) • Direct input: Peak value of 9 A or RMS value of 3 A, whichever is less. • External sensor input: Peak value less than or equal to 10 times the measurement range. Current (30A input element) • Direct input: Peak value of 150 A or RMS value of 50 A, whichever is less. • External sensor input: Peak value less than or equal to 10 times the measurement range. Continuous maximum Voltage allowable input Peak value of 1600 V or RMS value of 1100 V, whichever is less. Current (2A input element) • Direct input: Peak value of 6 A or RMS value of 2.2 A, whichever is less. • External sensor input: Peak value less than or equal to 5 times the measurement range. Current (30A input element) • Direct input: Peak value of 90 A or RMS value of 33 A, whichever is less. • External sensor input: Peak value less than or equal to 5 times the measurement range. Continuous maximum common mode voltage (50/60 Hz) 1000 Vrms Influence from common mode voltage Apply 1000 Vrms with the voltage input terminals shorted and the current input terminals open. • 50/60 Hz: ±0.01% of range or less • Reference value up to 200 kHz Voltage: ±3/range × f% of range or less. However, 3% or less. Current direct input and current sensor input: ± (max. range/range)× 0.001 × f% of range or less. However, 0.01% or more. The units of f are kHz. The max. range within equations is 30 A or 2 A or 10 V. 12 Line filter Frequency filter A/D converter Select OFF, 500 Hz, 5.5 kHz, or 50 kHz. Select OFF, or ON Simultaneous voltage and current conversion and 16-bit resolution. Conversion speed (sampling rate): Approximately 5 µs. See harmonic measurement items for harmonic display. Can be set for each input element. Increasing range value • When the measured values of U and I exceed 110% of the range rating • When the peak value exceeds approximately 330% of the range rating (or approximately 660% for crest factor 6) Decreasing range value • When the measured values of U and I fall to 30% or less of the range rating, and Upk and Ipk are 300% or less of the lower range value (or 600% for crest factor 6) Range switching Auto range functions Display Display 8.4-inch color TFT LCD monitor Total number of pixels* 640 (horiz.) x 480 (vert.) dots Waveform display resolution 501 (horiz.) x 432 (vert.) dots Same as the data update rate. Exceptions are listed below. • The display update interval of numeric display (4, 8, and 16 items) is 250 ms when the data update rate is 50 ms or 100 ms. • The display update interval of numeric display (ALL, Single List, and Dual List) is 500 ms when the data update rate is 50 ms to 250 ms. • The display update rate of the trend display, bar graph display, and vector display is 1 s when the data update rate is 50 ms to 500 ms. • The display update interval of the waveform display is approximately 1 s when the data update rate is 50 ms to 1 s. However, it may be longer depending on the trigger setting. * Up to 0.02% of the pixels on the LCD may be defective. Calculation Functions UΣ IΣ [V] [A] PΣ SΣ [W] [VA] 3 phase, 3 wire Single-phase, 3 phase, 3 wire (3 voltage 3 current) 3 wire (U1+U2+U3)/3 (U1+U2)/2 (I1+I2+I3)/3 (I1+I2)/2 QΣ [var] TYPE1 TYPE2 PcΣ WPΣ WP+Σ WP–Σ qΣ q+Σ q–Σ [W] [Wh] [Wh] [Wh] [Ah] [Ah] [Ah] WQΣ [varh] WSΣ [VAh] P1+P2+P3 P1+P2 TYPE1, S1+S2 TYPE2 TYPE3 3 phase, 4 wire 3 (S1+S2) 2 3 (S1+S2+S3) 3 S1+S2+S3 PΣ2+QΣ2 Q1+Q2 Q1+Q2+Q3 SΣ2–PΣ2 TYPE3 Q1+Q2 Pc1+Pc2 WP1+WP2 WP+1+WP+2 WP–1+WP–2 q1+q2 q+1+q+2 q–1+q-2 1 Q1+Q2+Q3 Pc1+Pc2+Pc3 WP1+WP2+WP3 WP+1+WP+2+WP+3 WP-1+WP-2+WP-3 q1+q2+q3 q+1+q+2+q+3 q-1+q-2+q-3 N Σ | QΣ(n) | ×Time N n=1 QΣ(n) is the nth reactive power Σ function , and N is the number of data updates. λΣ 1 N Σ SΣ(n)×Time N n=1 SΣ(n) is the nth apparent power Σ function, and N is the number of data updates. PΣ SΣ ØΣ [˚] cos-1 ( PΣ ) SΣ Note1) The instrument’s apparent power (S), reactive power (Q), power factor (l), and phase angle (Ø) are calculated using measured values of voltage, current, and active power. (However, reactive power is calculated directly from sampled data when TYPE3 is selected.) Therefore, when distorted waveforms are input, these values may be different from those of other measuring instruments based on different measuring principals. Note 2) The value of Q in the QΣ calculation is calculated with a preceding minus sign (-) when the current input leads the voltage input, and a plus sign when it lags the voltage input, so the value of QΣ may be negative. η [%] Set a efficiency calculation up to 4 User-defined functions F1–F20 Create equations combining measurement function symbols, and calculate up to twenty numerical data. Waveform Display (WAVE display) Waveform display items Voltage and current from elements 1 through 4 Motor version torque and waveform of revolution speed Accuracy Voltage/current [Conditions] *These conditions are all accuracy condition in this section. Temperature: 23±5°C, Humidity: 30 to 75%RH, Input waveform: Sine wave, Common mode voltage:0 V, Crest factor: 3, Line filter: OFF, λ (power factor): 1, After warm-up. After zero level, compensation or range value change while wired. f is frequency (kHz), 6month 30A input element, 2A input element (500mA, 1A, 2A range), Voltage input Voltage/current DC Power 0.05% of reading+0.05% of range (U, 30A, Sensor) 0.05% of reading+0.1% of range 0.05% of reading+0.05% of range+2uA (2A) 0.05% of reading+0.1% of range+2µAU reading (2A) 0.1Hzf30Hz 0.1% of reading+0.2% of range 0.2% of reading+0.3% of range 30Hzf45Hz 0.03% of reading+0.05% of range 0.05% of reading+0.05% of range 45Hzf66Hz 0.01% of reading+0.03% of range 0.02% of reading+0.04% of range 66Hzf1kHz 0.03% of reading+0.05% of range 0.05% of reading+0.05% of range 1kHzf10kHz 0.1% of reading+0.05% of range 0.15% of reading+0.1% of range 10kHzf50kHz 0.3% of reading+0.1% of range 0.3% of reading+0.2% of range 50kHzf100kHz 0.012f% of reading+0.2% of range 0.014f% of reading+0.3% of range 100kHzf500kHz 0.009f% of reading+0.5% of range 0.012f% of reading+1% of range 500kHzf1MHz (0.022f–7)% of reading+1% of range (0.048f–19)% of reading+2% of range U: Voltage, sensor: external sensor input, 2A: 500mA, 1A, 2A range of 2A direct current input, 30A: 30A direct current input 2A input element (5mA, 10mA, 20mA, 50mA, 100mA, 200mA range) Current DC Power 0.05% of reading+0.05% of range (sensor) 0.05% of reading+0.1% of range (sensor) 0.05% of reading+0.05% of range+2uA (direct) 0.05% of reading+0.1% of range+2uAV reading (direct) 0.1Hzf30Hz 0.1% of reading+0.2% of range 0.2% of reading+0.3% of range 30Hzf45Hz 0.03% of reading+0.05% of range 0.05% of reading+0.05% of range 45Hzf66Hz 0.03% of reading+0.05% of range 0.05% of reading+0.05% of range 66Hzf1kHz 0.03% of reading+0.05% of range 0.05% of reading+0.05% of range 1kHzf10kHz 0.1% of reading+0.05% of range 0.15% of reading+0.1% of range 10kHzf50kHz 0.3% of reading+0.1% of range 0.3% of reading+0.2% of range 50kHzf100kHz 0.012f% of reading+0.2% of range 0.014f% of reading+0.3% of range 100kHzf500kHz 0.009f% of reading+0.5% of range 0.012f% of reading+1% of range 500kHzf1MHz (0.022f–7)% of reading+1% of range (0.048f–19)% of reading+2% of range U: Voltage, sensor: external sensor input, direct: direct current input * The units of f in the reading error equation are kHz. 30A input element/2A input element • For temperature changes after zero level compensation or range change, add 0.2mA/°C to the DC accuracy of the 30A input element. • For temperature changes after zero level compensation or range change, add 2uA/°C to the DC accuracy of the 2A input element. • For temperature changes after zero-level compensation or range change on the external current sensor input, add 0.02 mV/°C to the DC accuracy of the external current sensor input. • Accuracy of waveform display data, Upk and Ipk Add 3% of range to the accuracy above. However, add 3% of range +5mV for external input(reference value). Effective input range is within ±300% (within ±600% for crest factor 6) • Influenced by changes in temperature after zero level correction or range value changes. Add 50ppm of range/°C to the voltage DC accuracy, 0.2 mA/°C to the 30A input current DC accuracy, 3µA/°C to the 2A current accuracy, 0.02 mV/°C to the external current DC accuracy, and influence of voltage times influence of current to the power DC accuracy. 30A input element For self-generated heat caused by current input on an DC input signal, add 0.00002 I2% of reading + 3 I2uA to the current accuracy. I is the current reading (A). The influence from selfgenerated heat continues until the temperature of the shunt resistor inside the WT3000 lowers even if the current input changes to a small value. 2A input element For self-generated heat caused by current input on an DC input signal, add 0.004 I2% of reading + 6 I2uA to the current accuracy. I is the current reading (A). The influence from selfgenerated heat continues until the temperature of the shunt resistor inside the WT3000 lowers even if the current input changes to a small value. • Additions to accuracy according to the data update rate Add 0.05% of reading when it is 100 ms, and 0.1% of reading when 50ms. • Range of guaranteed accuracy by frequency, voltage, and current All accuracies between 0.1 Hz and 10 Hz are reference values. If the voltage exceeds 750 V at 30 kHz–100 kHz, or exceeds {2.2 x 104/ f(kHz)}V at 100 kHz–1 MHz, the voltage and power values are reference values. If the current exceeds 20 A at DC, 10 Hz–45Hz, or 400 Hz–200 kHz; or if it exceeds 10 A at 200 kHz–500 kHz; or exceeds 5 A at 500 kHz–1 MHz, the current and power accuracies are reference values. • Accuracy for crest factor 6: Range accuracy of crest factor 3 for two times range. Total power error with respect to the range for an arbitrary power factor λ (exclude λ = 1) — Power When λ=0 (500mA to 30A range) Apparent power reading×0.03% in the 45 to 66 Hz range All other frequencies are as follows (however, these are only reference values): Apparent power reading× (0.03+0.05×f(kHz))% When λ=0 (5mA to 200mA range) Apparent power reading×0.1% in the 45 to 66 Hz range All other frequencies are as follows (however, these are only reference values): Apparent power reading× (0.1+0.05×f(kHz))% 0 < λ < 1 (45 Hz to 66 Hz) (Power reading) × [(power reading error %) + (power range error %) × (power range /apparent power indication value) + [tanϕ × (influence when λ = 0) %}. ϕ is the phase angle between the voltage and current. When cutoff frequency is 500 Hz When cutoff frequency is 500 Hz "45 to 66Hz: Add 0.2% of reading "45 to 66Hz: Add 0.3% of reading Under 45 Hz: Add 0.5% of reading" Under 45 Hz: Add 1% of reading" When cutoff frequency is 5.5 kHz When cutoff frequency is 5.5 kHz Influence of line filter "66Hz or less: Add 0.2% of reading "66Hz or less: Add 0.3% of reading 66 to 500Hz: Add 0.5% of reading" 66 to 500Hz: Add 1% of reading" When cutoff frequency is 50 kHz When cutoff frequency is 50 kHz "500Hz or less: Add 0.2% of reading "500Hz or less: Add 0.3% of reading 500 to 5kHz: Add 0.5% of reading" 500 to 5kHz: Add 1% of reading" The phase lead and lag are detected correctly when the voltage and current signals Lead/Lag Detection (d (LEAD)/G (LAG) of the are both sine waves, the lead/lag is 50% of the range rating (or 100% for crest factor 6), the frequency is between 20 Hz and 10 kHz, and the phase angle is ± (5˚ to 175˚) phase angle and symbols for the reactive or more. power Q∑ calculation) * The s symbol shows the lead/lag of each element, and "-" indicates leading. Temperature coefficient ±0.02% of reading/˚C at 5–18˚ or 28–40 ˚C. Udc and Idc are 0 to ±130% of the measurement range Urms and Irms are 1 to 130%* of the measurement range (or 2%–130% for crest factor 6) Umn and Imn are 10 to ±130% of the measurement range Urmn and Irmn are 10 to ±130%* of the measurement range Power is 0 to ±130%* for DC measurement, 1 to 130%* of the voltage and current Effective input range range for AC measurement, and up to ±130%* of the power range. However, when the data update rate is 50 ms, 100 ms, 5 sec, 10 sec, or 20 sec, the synchronization source level falls below the input signal of frequency measurement. * 110% for maximum range of direct voltage and current inputs. The accuracy at 110 to 130% of the measurement range is the reading error ×1.5. Max. display 140% of the voltage and current range rating Urms and Irms are up to 0.3% relative to the measurement range (or up to 0.6% for a crest factor of 6). Min. display Umn, Urmn, Imn, and Irmn are up to 2% (or 4% for a crest factor of 6). Below that, zero suppress. Current integration value q also depends on the current value. Data update rate 50ms 100ms 250ms 500ms 1s 2s 5s 10s 20s Measurement lower Measurement lower 45Hz 25Hz 20Hz 10Hz 5Hz 2Hz 0.5Hz 0.2Hz 0.1Hz limit frequency limit frequency Accuracy of apparent Voltage accuracy + current accuracy power S Accuracy of Accuracy of apparent power reactive power Q +( (1.0004–λ2) – (1–λ2) ) ×100% of range ± [(λ–λ/1.0002)+ |cosØ–cos{Ø+sin-1(influence of power factor of power when Accuracy of power factor λ=0%/100)}|] ±1digit when voltage and current is at rated input of the measurement λ range. Ø is the phase difference of voltage and current. Accuracy of phase ± [|Ø–cos-1 (λ/1.0002)| + sin–1 {(influence of power factor of power when λ=0%)/100}] difference Ø deg ±1digit when voltage and current is at rated input of the measurement range One-year accuracy Add the accuracy of reading error (Six-month) × 0.5 to the accuracy six-month 13 Precision Power Analyzer WT3000 Functions Measurement method Crest factor Digital multiplication method 3 or 6 (when inputting rated values of the measurement range), and 300 relative to the minimum valid input. However, 1.6 or 3.2 at the maximum range (when inputting rated values of the measurement range), and 160 relative to the minimum valid input. Measurement period Interval for determining the measurement function and performing calculations. Period used to determine and compute the measurement function. • The measurement period is set by the zero crossing of the reference signal (synchronization source) when the data update interval is 50 ms, 100 ms, 5 s, 10 s, or 20 s (excluding watt hour WP as well as ampere hour q during DC mode). • Measured through exponential averaging on the sampled data within the data update interval when the data update interval is 250 ms, 500 ms, 1 s, or 2 s. • For harmonic measurement, the measurement period is from the beginning of the data update interval to 9000 points at the harmonic sampling frequency. Wiring You can select one of the following five wiring settings. 1P2W (single phase, two-wire), 1P3W (single phase, 3 wire), 3P3W (3 phase, 3 wire), 3P4W (3 phase, 4 wire), 3P3W(3V3A) (3 phase, 3 wire, 3 volt/3 amp measurement). However, the number of available wiring settings varies depending on the number of installed input elements. Up to four, or only one, two, or three wiring settings may be available. Compensation Functions • Efficiency Compensation Compensation of instrument loss during efficiency calculation • Wiring Compensation Compensation of instrument loss due to wiring • 2 Wattmeter Method Compensation (/DT option) Compensation for 2 wattmeter method Scaling When inputting output from external current sensors, VT, or CT, set the current sensor conversion ratio, VT ratio, CT ratio, and power coefficient in the range from 0.0001 to 99999.9999. Input filter Line filter or frequency filter settings can be entered. Averaging • The average calculations below are performed on the normal measurement parameters of voltage U, current I, power P, apparent power S, reactive power Q. Power factor l and phase angle Ø are determined by calculating the average of P and S. Select exponential or moving averaging. • Exponential average Select an attenuation constant of 2, 4, 8, 16, 32, or 64. • Moving average Select the number of averages from 8, 16, 32, 64, 128, or 256. • The average calculations below are performed on the harmonic display items of voltage U, current I, power P, apparent power S, reactive power Q. Power factor l is determined by calculating the average of P and Q. Only exponential averaging is performed. Select an attenuation constant of 2, 4, 8, 16, 32 or 64 Data update rate Select 50 ms, 100 ms, 250 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, or 20 s. Response time At maximum, two times the data update rate (only during numerical display) Hold Holds the data display. Single Executes a single measurement during measurement hold. Zero level compensation/Null Compensates the zero level. Integration Mode Timer Count over Accuracy Time accuracy Remote control Select a mode of Manual, Standard, Continuous (repeat), Real Time Control Standard, or Real Time Control Continuous (Repeat). Integration can be stopped automatically using the integration timer setting. 0000h00m00s~10000h00m00s If the count over integration time reaches the maximum integration time (10000 hours), or if the integration value reaches max/min display integration value (±999999 M), the elapsed time and value is saved and the operation is stopped. ± [power accuracy (or current accuracy) + time accuracy] ± 0.02% of reading EXT START, EXT STOP, EXT RESET, EXT HOLD, EXT SINGLE and EXT PRINT (all input signal) / INTEG BUSY (output signal). Requires /DA option. • Numerical display function Display resolution 600000 Number of display items Select 4, 8, 16, all, single list, or dual list. 14 501 Peak-peak compressed data Range from 0.5 ms–2 s/div. However, it must be 1/10th of the data update rate. Edge type Select Auto or Normal. Triggers are turned OFF automatically during integration. Select voltage, current, or external clock for the input to each input element. Select (Rising), (Falling), or (Rising/Falling). When the trigger source is the voltage or current input to the input elements. Set in the range from the center of the screen to ±100% (top/bottom edge of the screen). Setting resolution: 0.1% When the trigger source is Ext Clk, TTL level. Voltage and current input to the waveform vertical axis zoom input element can be zoomed along the vertical axis. Set in the range of 0.1 to 100 times. ON/OFF can be set for each voltage and current input to the input element. You can select 1, 2, 3 or 4 splits for the waveform display. Select dot or linear interpolation. Select graticule or cross-grid display. Upper/lower limit (scale value), and waveform label ON/OFF. When you place the cursor on the waveform, the value of that point is measured. Trigger Source Trigger Slope Trigger Level Vertical axis Zoom ON/OFF Format Interpolation Graticule Other display ON/OFF Cursor measurements Zoom function No time axis zoom function * Since the sampling frequency is approximately 200 kHz, waveforms that can be accurately reproduced are those of about 10 kHz. • Vector Display/Bar Graph Display Vector display Vector display of the phase difference in the fundamental waves of voltage and current. Bar graph display Displays the size of each harmonic in a bar graph. • Trend display Number of measurement channels Up to 16 parameters Displays trends (transitions) in numerical data of the measurement functions in a sequential line graph. • Simultaneous display Two windows can be selected (from numerical display, waveform display, bar graph display, or trend display) and displayed in the upper and lower parts of the screen. Saving and Loading Data Settings, waveform display data, numerical data, and screen image data can be saved to media.* Saved settings can be loaded from a medium. * PC card, USB memory (/C5 option) Store function Internal memory size Approximately 30 MB Store interval (waveform OFF) Maximum 50msec to 99 hour 59 minutes 59 seconds. Guideline for Storage Time (Waveform Display OFF, Integration Function OFF) Number of measurement channels Measured Items (Per CH) Storage Interval Storable Amnt. of Data 2ch 2ch 4ch 4ch 3 10 10 20 50 ms 1 sec 50 ms 1 sec Approx. 10 hr 20 m Approx. 86 hr Approx. 2 hr 30 m Approx. 24 hr Note: Depending on the user-defined math, integration, and other settings, the actual measurement time may be shorter than stated above. Store function can’t use in combination with auto print function. Motor Evaluation Function (-MV, Motor Version) Measurement Function Method of Determination, Equation Rotating speed When the input signal from the revolution sensor is DC voltage (analog signal) Input voltage from revolution sensor x scaling factor Scaling factor: Number of revolutions per 1 V input voltage When the input signal from the revolution sensor is number of pulses Number of input pulses from revolution sensor per minute Number of pulses per rotation Torque SyncSp Display • Waveform display items No. of display rasters Display format Time axis Triggers Trigger Type Trigger Mode Slip[%] Motor output Pm ×Scaling factor When the type of input signal from the torque meter is DC voltage (analog signal) Input voltage from torque meter x scaling factor Scaling factor: Torque per 1 V input voltage When the type of input signal from the torque is number of pulses Enter N·m equivalent to upper- and lower-limit frequencies to determine an inclination from these two frequencies, and then multiply the number of pulses. 120 x freq. of the freq. meas. source motor’s number of poles SyncSp-Speed ×100 SyncSp 2π×Speed×Torque ×scaling factor 60 Integrated Value Revolution signal, torque signal • When revolution and torque signals are DC voltage (analog input) Connector type Insulated BNC connector Input range 1 V,2 V,5 V,10 V,20 V Effective input range 0%–±110% of measurement range Input resistance Approximately 1 MΩ Continuous maximum allowed input ±22 V Continuous maximum common mode voltage ±42 Vpeak or less Accuracy ±(0.1% of reading+0.1% of range) Temperature coefficient ±0.03% of range/°C • When revolution and torque signals are pulse input Connector type Insulated BNC connector Frequency range 2 Hz–200 kHz Amplitude input range ±12 Vpeak Effective amplitude 1 V (peak-to peak) or less Input waveform duty ratio 50%, square wave Input resistance Approximately 1 MΩ Continuous maximum common mode voltage ±42 Vpeak or less Accuracy ±(0.05% of reading+1mHz) D/A output Approx. 7.0 V 5.0V Other Items Printing method Dot density Paper width Effective recording width Recorded information Auto print function Displayed value [%] Approx. –7.0 V Approx. –7.5 V Item Measured source Format Frequency range PLL source U1, U2, U3: Line voltage that can be computed for a three phase, U1, U2, U3: Neutral line voltage that can be computed for a threephase, four-wire system I1: Differential current determined by computation Phase current that are not measured but can be computed FFT data length FFT processing word length Window function Anti-aliasing filter Neutral line current D/A Output (/DA Optional) D/A conversion resolution Output voltage Update rate Number of outputs Accuracy 16 bits ±5 V FS (max. approximately ±7.5 V) for each rated value Same as the data update rate on the main unit. 20 channels (each channel can be set separately) ± (accuracy of a given measurement function + 0.1% of FS) FS = 5V D/A zoom Setting maximum and minimum values. Continuous maximum common mode voltage ±42Vpeak or less Minimum load 100 kΩ Temperature coefficient ±0.05% of FS/°C Remote control EXT START, EXT STOP, EXT RESET, EXT HOLD, EXT SINGLE and EXT PRINT (all input signal) / INTEG BUSY (output signal) Requires /DA option Frequency (Simplified Figure Below) D/A output Approx. 7.5 V 15-pin D-Sub (receptacle) VGA compatible Advanced Calculation (/G6 optional) three-wire (3V3A) system Neutral line current Thermal line-dot 8 dots/mm 112 mm 104 mm Screenshots, list of measured values, harmonic bar graph printouts, settings Measured values are printed out automatically. However, auto print function can’t use in combination with store function. • Wide Bandwidth Harmonic Measurement phase, three-wire system Specifications All installed elements PLL synchronization method (when the PLL source is not set to Smp Clk) or external sampling clock method (when the PLL source is set to Smp Clk) • PLL synchronization method Fundamental frequency of the PLL source is in the range of 10 Hz to 2.6 kHz. • External sampling clock method Input a sampling clock signal having a frequency that is 3000 times the fundamental frequency between 0.1 Hz and 66 Hz of the waveform on which to perform harmonic measurement. The input level is TTL. The input waveform is a rectangular wave with a duty ratio of 50%. • Select the voltage or current of each input element (external current sensor range is greater than or equal to 500 mV) or the external clock (Ext Clk or Smp Clk). • Input level Greater than or equal to 50% of the measurement range rating when the crest factor is 3 Greater than or equal to 100% of the measurement range rating when the crest factor is 6 • Turn the frequency filter ON when the fundamental frequency is less than or equal to 440 Hz. 9000 32 bits Rectangular Set using a line filter (OFF, 500 Hz, 5.5 kHz, or 50 kHz). Sample rate (sampling frequency), window width, and upper limit of measured order PLL source synchronization method Fundamental Sample Rate Window Width against Upper Limit of the Frequency of the (S/s) the FFT Data Length Measured Order PLL Source (Frequency of the (Hz) Fundamental Wave) 10 to 20 f × 3000 3 100 20 to 40 f × 1500 6 100 40 to 55 f × 900 10 100 55 to 75 f × 750 12 100 75 to 150 f × 450 20 50 150 to 440 f × 360 25 50 440 to 1100 f × 150 60 50 1100 to 2600 f × 60 150 20 External sampling clock method 5.0V 2.5V 0.5V 0.5Hz 1Hz 100140 RGB Video Signal (VGA) Output Section (/V1 Optional) Connector type Output format U1: Line voltage that are not measured but can be computed for a three- DELTA→STAR STAR→DELTA 0 –5.0 V Built-in Printer (/B5 Optional) U1: Differential voltage determined by computation u1 and u2 Current (A) difference 3P3W→3V3A –140–100 Note that PF and deg are not output beyond the range of ±5.0 V. If an error occurs, approximately ±7.5 V are output. 0° to 360° are output at 0 to 5.0 V; LAG180° to LEAD180° are output at -5.0 V to 5.0 V. Specifications STAR→DELTA Integration time D/A output Approx. 7.5 V Approx. 7.0 V 5.0 V Output Approx. 7.0 V 5.0 V 0V –5.0 V Approx. –7.0 V Displayed Value 140% 100% 0% –100% –140% Delta Calculation Function (/DT Optional) DELTA→STAR to t0:Rated time of integrated D/A output for manual integration mode, specified time of timer for normal integration and repetitive (continuous) integration modes Added Frequency Measurement (/FQ Optional) Item Rated input 0 Device under measurement Select up to two frequencies of the voltage or current input to the input elements for measurement. If the frequency option (/ FQ) is installed, the frequencies of the voltages and currents being input to all input elements can be measured. Measurement method Reciprocal method Measurement range Data Update Rate Measuring Range 50ms 45Hzf1MHz 100ms 25Hzf1MHz 250ms 10Hzf500kHz 500ms 5Hzf200kHz 1s 2.5Hzf100kHz 2s 1.5Hzf50kHz 5s 0.5Hzf20kHz 10s 0.25Hzf10kHz 20s 0.15Hzf5kHz Accuracy ±0.05% of reading When the input signal levels are greater than or equal to 25 mV (current external sensor input), 1.5mA (current direct input of 2A input element) and 150 mA (current direct input of 30A input element) respectively, and the signal is greater than or equal to 30% (0.1 Hz–440 Hz, frequency filter ON), 10% (440 Hz–500 kHz), or 30% (500 kHz–1 MHz) of the measurement range. However, when the measuring frequency is smaller or equal to 2 times of above lower frequency, the input signal is greater than or equal to 50%. Add 0.05% of reading when current external input is smaller than or equal to 50 mV input signal level for each is double for crest factor 6. Voltage(V) difference 3P3W→3V3A Input that is 140% of the rating 10Hz 100Hz 1kHz 10kHz 100kHz 1MHz Displayed value Fundamental Frequency of the PLL Source (Hz) 0.1 to 66 Sample Rate (S/s) f × 3000 Window Width against the FFT Data Length (Frequency of the Fundamental Wave) 3 Upper Limit of the Measured Order 100 15 Precision Power Analyzer WT3000 Accuracy Frequency Measurement range Display update • When the line filter (500 Hz) is ON Frequency Voltage and Current ±(reading error + measurement range error) 0.7% of reading + 0.3% of range 0.1 Hz f 10 Hz 0.7% of reading + 0.3% of range 10 Hz f 30 Hz 0.7% of reading + 0.05% of range 30 Hz f 66 Hz Power ±(reading error + measurement range error) 1.4% of reading + 0.4% of range 1.4% of reading + 0.4% of range 1.4% of reading + 0.1% of range • When the line filter (5.5 kHz) is ON Frequency Voltage and Current ±(reading error + measurement range error) 0.25% of reading + 0.3% of range 0.1 Hz f 10 Hz 0.25% of reading + 0.3% of range 10 Hz f 30 Hz 0.3% of reading + 0.05% of range 30 Hz f 66 Hz 0.6% of reading + 0.05% of range 66 Hz f 440 Hz 1% of reading + 0.05% of range 440 Hz f 1 kHz 2.5% of reading + 0.05% of range 1 kHz f 2.5 kHz 8% of reading + 0.05% of range 2.5 kHz f 3.5 kHz Power ±(reading error + measurement range error) 0.5% of reading + 0.4% of range 0.5% of reading + 0.4% of range 0.45% of reading + 0.1% of range 1.2% of reading + 0.1% of range 2% of reading + 0.1% of range 5% of reading + 0.15% of range 16% of reading + 0.15% of range • IEC Harmonic Measurement If the fundamental frequency is between 1 kHz and 2.6 kHz Add 0.5% of reading to the voltage and current accuracy for frequencies greater than 1 kHz. Add 1% of reading to the power accuracy for frequencies greater than 1 kHz. • When the line filter (50 kHz) is ON Frequency Voltage and Current ±(reading error + measurement range error) 0.25% of reading + 0.3% of range 0.1 Hz f 10 Hz 0.25% of reading + 0.3% of range 10 Hz f 30 Hz 0.3% of reading + 0.05% of range 30 Hz f 440 Hz 0.7% of reading + 0.05% of range 440 Hz f 1 kHz 0.7% of reading + 0.05% of range 1 kHz f 5 kHz 3.0% of reading + 0.05% of range 5 kHz f 10 kHz Power ±(reading error + measurement range error) 0.45% of reading + 0.4% of range 0.45% of reading + 0.4% of range 0.45% of reading + 0.1% of range 1.4% of reading + 0.1% of range 1.4% of reading + 0.15% of range 6% of reading + 0.15% of range If the fundamental frequency is between 1 kHz and 2.6 kHz Add 0.5% of reading to the voltage and current accuracy for frequencies greater than 1 kHz. Add 1% of reading to the power accuracy for frequencies greater than 1 kHz. • When the line filter is OFF Frequency 0.1 Hz f 10 Hz 10 Hz f 30 Hz 30 Hz f 1 kHz 1 kHz f 10 kHz 10 kHz f 55 kHz Voltage and Current ±(reading error + measurement range error) 0.15% of reading + 0.3% of range 0.15% of reading + 0.3% of range 0.1% of reading + 0.05% of range 0.3% of reading + 0.05% of range 1% of reading + 0.2% of range PPL Timeout value Power ±(reading error + measurement range error) 0.25% of reading + 0.4% of range 0.25% of reading + 0.4% of range 0.2% of reading + 0.1% of range 0.6% of reading + 0.15% of range 2% of reading + 0.4% of range • If the fundamental frequency is between 400 Hz and 1 kHz Add 1.5% of reading to the voltage and current accuracy for frequencies greater than 10 kHz. Add 3% of reading to the power accuracy for frequencies greater than 10 kHz. • If the fundamental frequency is between 1 kHz and 2.6 kHz Add 0.5% of reading to the voltage and current accuracy for frequencies greater than 1 kHz and less than or equal to 10 kHz. Add 7% of reading to the voltage and current accuracy for frequencies greater than 10 kHz. Add 1% of reading to the power accuracy for frequencies greater than 1 kHz and less than equal to 10 kHz. Add 14% of reading to the power accuracy for frequencies greater than 10 kHz. However, all the items below apply to all tables. • When the crest factor is set to 3 • When λ (power factor) = 1 • Power figures that exceed 440 Hz are reference values. • For external current sensor range, add 0.2 mV to the current accuracy and add (0.2 mV/ external current sensor range rating)×100% of range to the power accuracy. • For 30A direct current input range, add 0.2 mA to the current accuracy and add (0.2 mA/ direct current input range rating)×100% of range to the power accuracy. • For 2A direct current input range, add 2 µA to the current accuracy and add (2 µA/direct current input range rating) × 100% of range to the power accuracy. • For nth order component input, add {n/(m+1)}/50% of (the nth order reading) to the n+mth order and n-mth order of the voltage and current, and add {n/(m+1)}/25% of (the nth order reading) to the n+mth order and n-mth order of the power. • Add (n/500)% of reading to the nth component of the voltage and current, and add (n/ 250)% of reading to the nth component of the power. • Accuracy when the crest factor is 6: The same as when the range is doubled for crest factor 3. • The accuracy guaranteed range by frequency and voltage/current is the same as the guaranteed range of normal measurement. Item Measured source Format Frequency range PLL source FFT data length FFT processing word length Window function Anti-aliasing filter Interharmonic measurement Specifications Select an input element or an Σ wiring unit PLL synchronization method Fundamental frequency of the PLL source is in the range of 45 Hz to 66 Hz. • Select the voltage or current of each input element (external current sensor range is greater than or equal to 500 mV) or the external clock (fundamental frequency). • Input level Greater than or equal to 50% of the measurement range rating when the crest factor is 3 Greater than or equal to 100% of the measurement range rating when the crest factor is 6 • Be sure to turn the frequency filter ON. 9000 32 bits Rectangular Set using a line filter (5.5 kHz). Select OFF, Type1, or Type2. Sample rate (sampling frequency), window width, and upper limit of measured order Fundamental Frequency of the PLL Source (Hz) 45 to 55 55 to 66 Sample Rate (S/s) f × 900 f × 750 Window Width against the FFT Data Length (Frequency of the Fundamental Wave) 10 12 Upper Limit of the Measured Order 50 50 Accuracy • When the line filter (5.5 kHz) is ON Frequency Voltage and Current ±(reading error + measurement range error) 0.2% of reading + 0.04% of range 45 Hz f 66 Hz 0.5% of reading + 0.05% of range 66 Hz f 440 Hz 1% of reading + 0.05% of range 440 Hz f 1 kHz 2.5% of reading + 0.05% of range 1 kHz f 2.5 kHz 8% of reading + 0.05% of range 2.5 kHz f 3.3 kHz Power ±(reading error + measurement range error) 0.4% of reading + 0.05% of range 1.2% of reading + 0.1% of range 2% of reading + 0.1% of range 5% of reading + 0.15% of range 16% of reading + 0.15% of range However, all the items below apply. • When the crest factor is set to 3 • When λ (power factor) = 1 • Power figures that exceed 440 Hz are reference values. • For external current sensor range, add 0.03 mV to the current accuracy and add (0.03 mV/ external current sensor range rating)×100% of range to the power accuracy. • For 30A direct current input range, add (0.1 mA/direct current input range rating)× 100% of range to the power accuracy. • For 2A direct current input range, add (1 µA/direct current input range rating) × 100% of range to the power accuracy. • For nth order component input, add {n/(m+1)}/50% of (the nth order reading) to the n+mth order and n-mth order of the voltage and current, and add {n/(m+1)}/25% of (the nth order reading) to the n+mth order and n-mth order of the power (only when applying a single frequency). • Accuracy when the crest factor is 6: The same as when the range is doubled for crest factor 3. • The accuracy guaranteed range by frequency and voltage/current is the same as the guaranteed range of normal measurement. Frequency Measurement range Display update 45 Hz f 1 MHz Depends on the PLL source (Approximately 200 ms when the frequency of the PLL source is 45 Hz to 66 Hz.) • Waveform Computation Function Item Computed source Equation Operator Sampling clock Display update 16 • PLL synchronization method: 2.5 Hz f 100 kHz • External sampling clock method: 0.15 Hz f 5 kHz Depends on the PLL source • PLL synchronization method: 1 s or more • External sampling clock method: 20 s or more Depends on the PLL source • PLL synchronization method: 5 s or more • External sampling clock method: 40 s or more Specifications Voltage, current, and active power of each input element; torque (analog input) and speed (analog input) of motor input; and motor output Two equations (MATH1 and MATH2) +, –, *, /, ABS (absolute value), SQR (square), SQRT (square root), LOG (natural logarithm), LOG10 (common logarithm), EXP (exponent), NEG (negation), AVG2, AVG4, AVG8, AVG16, AVG32, AVG64 (exponential average). Fixed to 200 kHz Data update interval + computing time • FFT Function Specifications Item Computed source Specifications Voltage, current, active power, and reactive power of each input element. Active power and reactive power of an Σ wiring unit. Torque and speed signals (analog input) of motor input (option). Type PS (power spectrum) Number of computations Two computations (FFT1 and FFT2) Maximum frequency of 100 kHz analysis Number of points 20,000 points or 200,000 points Measurement period for 100 ms or 1 s the computation Frequency resolution 10 Hz or 1 Hz Window function Rectangular, Hanning, or Flattop Anti-aliasing filter Set using a line filter (OFF, 500 Hz, 5.5 kHz, or 50 kHz). Sampling clock Fixed to 200 kHz Display update Data update rate or (measurement period of the FFT + FFT computing time), whichever is longer * The measurement period is 1 s when the number of FFT points is 200 k (when the frequency resolution is 1 Hz). The measurement period is 100 ms when the number of FFT points is 20 k (when the frequency resolution is 10 Hz). • Harmonic Measurement in Normal Measurement Item Measured source Format Frequency range PLL source FFT data length FFT processing word length Window function Anti-aliasing filter Note) Specifications All installed elements PLL synchronization method Range in which the fundamental frequency of the PLL source is 10 Hz to 2600 Hz • Select the voltage or current of each input element (external current sensor range is greater than or equal to 500 mV) or the external clock (Ext Clk). • Input level Greater than or equal to 50% of the measurement range rating when the crest factor is 3 Greater than or equal to 100% of the measurement range rating when the crest factor is 6 • Turn the frequency filter ON when the fundamental frequency is less than or equal to 440 Hz. 9000 32 bits Rectangular Set using a line filter (5.5 kHz or 50 kHz). To measure and display harmonic data requires a data update rate of 500 ms or more Sample rate (sampling frequency), window width, and upper limit of measured order during PLL synchronization On models with the advanced computation (/G6) option Fundamental Sample Rate Window Width against the PLL Source (S/s) the FFT Data Length (Hz) (Frequency of the Fundamental Wave) 10 to 20 f × 3000 3 20 to 40 f × 1500 6 40 to 55 f × 900 10 55 to 75 f × 750 12 75 to 150 f × 450 20 150 to 440 f × 360 25 440 to 1100 f × 150 60 1100 to 2600 f × 60 150 Upper Limit of the Measured Order • When the line filter (50 kHz) is ON Frequency Voltage and Current ±(reading error + measurement range error) 0.25% of reading + 0.3% of range 10 Hz f 30 Hz 0.2% of reading + 0.15% of range 30 Hz f 440 Hz 1% of reading + 0.15% of range 440 Hz f 2.5 kHz 2% of reading + 0.15% of range 2.5 kHz f 5 kHz 3.5% of reading + 0.15% of range 5 kHz f 7.8 kHz If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the voltage and current accuracy and 1% of reading to the power accuracy when the frequency exceeds 1 kHz. • When the line filter is OFF Frequency 10 Hz f 30 Hz 30 Hz f 440 Hz 440 Hz f 2.5 kHz 2.5 kHz f 5 kHz 5 kHz f 7.8 kHz Voltage and Current ±(reading error + measurement range error) 0.15% of reading + 0.3% of range 0.1% of reading + 0.15% of range 0.6% of reading + 0.15% of range 1.6% of reading + 0.15% of range 2.5% of reading + 0.15% of range Power ±(reading error + measurement range error) 0.25% of reading + 0.4% of range 0.2% of reading + 0.15% of range 1.2% of reading + 0.2% of range 3.2% of reading + 0.2% of range 5% of reading + 0.2% of range If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the voltage and current accuracy and 1% of reading to the power accuracy when the frequency exceeds 1 kHz. However, all the items below apply to all tables. • When averaging is ON, the averaging type is EXP, and the attenuation constant is greater than or equal to 8. • When the crest factor is set to 3 • When λ (power factor) = 1 • Power exceeding 440 Hz are reference value. • For external current sensor range, add 0.2 mV to the current accuracy and add (0.2 mV/ external current sensor range rating)×100% of range to the power accuracy. • For 30A direct current input range, add 0.2 mA to the current accuracy and add (0.2 mA/ direct current input range rating)×100% of range to the power accuracy. • For 2A direct current input range, add 2 µA to the current accuracy and add (2 µA/direct current input range rating) × 100% of range to the power accuracy. • For nth order component input, add {n/(m+1)}/50% of (the nth order reading) to the n+mth order and n-mth order of the voltage and current, and add {n/(m+1)}/25% of (the nth order reading) to the n+mth order and n-mth order of the power. • Add (n/500)% of reading to the nth component of the voltage and current, and add (n/ 250)% of reading to the nth component of the power. • Accuracy when the crest factor is 6: The same as when the range is doubled for crest factor 3. • The accuracy guaranteed range by frequency and voltage/current is the same as the guaranteed range of normal measurement. If the amplitude of the high frequency component is large, influence of approximately 1% may appear in certain orders. The influence depends on the size of the frequency component. Therefore, if the frequency component is small with respect to the range rating, this does not cause a problem. • Waveform Sampling Data Saving Function Parameters 100 100 100 100 50 15 7 3 Power ±(reading error + measurement range error) 0.45% of reading + 0.4% of range 0.4% of reading + 0.15% of range 2% of reading + 0.2% of range 4% of reading + 0.2% of range 6% of reading + 0.2% of range Data type Storage Voltage waveform, current waveform, analog input waveform of torque and speed waveform calculation, FFT performing data CSV format, WVF format PCMCIA, USB memory (/C5 option) * Waveform calculation function (MATH) cannot be used with FFT calculation at the same time. Accuracy • When the line filter (5.5 kHz) is ON Frequency Voltage and Current ±(reading error + measurement range error) 0.25% of reading + 0.3% of range 10 Hz f 30 Hz 0.2% of reading + 0.15% of range 30 Hz f 66 Hz 0.5% of reading + 0.15% of range 66 Hz f 440 Hz 1.2% of reading + 0.15% of range 440 Hz f 1 kHz 2.5% of reading + 0.15% of range 1 kHz f 2.5 kHz 8% of reading + 0.15% of range 2.5 kHz f 3.5 kHz Power ±(reading error + measurement range error) 0.5% of reading + 0.4% of range 0.4% of reading + 0.15% of range 1.2% of reading + 0.15% of range 2% of reading + 0.15% of range 6% of reading + 0.2% of range 16% of reading + 0.3% of range If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the voltage and current accuracy and 1% of reading to the power accuracy when the frequency exceeds 1 kHz. 17 Precision Power Analyzer WT3000 Voltage Fluctuation/Flicker Measurement (/FL optional) • Normal Flicker Measurement Mode Item Specifications Measurement Items dc Relative steady-state voltage change (Measurement Functions) dmax Maximum relative voltage change d(t) The time during which the relative voltage change during a voltage fluctuation period exceeds the threshold level The maximum value within a observation period is displayed for the items above. Pst Short-term flicker value Plt Long-term flicker value One observation period 30 min to 15 s Observation period count 1 to 99 • Measurement of dmax Caused by Manual Switching Mode Item Measurement (Measurement Functions) One observation period Observation period count Averaging Specifications dmax Maximum relative voltage change 1 minute 24 Average of 22 measured dmax values excluding the maximum and minimum values among 24 values • Items Common to Measurement Modes Item Target voltage/frequency Measured item Measured source input Flicker scale Display update Specifications 230 V/ 50 Hz or 120 V/60 Hz All installed elements Voltage (current measurement function not available) 0.01 to 6400P.U. (20%) divided logarithmically into 1024 levels. 2 s (dc, dmax, and d(t)) For every completion of a observation period (Pst) Communication output dc. dmax, d(t), Pst, Plt, instantaneous flicker sensation (IFS), and cumulative probability function (CPF) Printer output Screen image External storage output Screen image Accuracy dc, dmax: 4% (at dmax = 4%) Pst: ±5% (at Pst = 1) Conditions for the accuracy above • Ambient temperature: 23 ± 1°C • Line filter: OFF • Input voltage range 220V to 250V at the 300V measuring range (50Hz) 110V to 130V at the 150V measuring range (60Hz) Cycle-by-cycle measurement (/CC optional) Synch source Number of measurements Timeout time Synch source frequency range Accuracy Select an external source of U1, I1, U2, I2, U3, I3, U4, or I4. (the above parameters are measured continuously for each cycle of the one sync source signal) 10-3000 0, 1-3600 seconds (set in units of seconds), 0(approximately 24 hours) 1 Hz to 1000 Hz (for U and I) 0.1 Hz to 1000Hz (for external sync source) U, I, P: Add [(0.3+2*f) % of reading+ ((0.05+0.05*f) % of range] to the accuracy for normal measurement. For external sensor input, Add (100+100*f) uV to the accuracy. Freq Add [(0.3+2*f)% of reading to the accuracy for normal measurement. *f is kHz GP-IB Interface Encoding Mode Address Clear remote mode Use one of the following by NATIONAL INSTRUMENTS: • AT-GPIB • PCI-GPIB and PCI-GPIB+ • PCMCIA-GPIB and PCMCIA-GPIB+ Use driver NI-488.2M version 1.60 or later. Conforms electrically and mechanically to IEEE St’d 488-1978 (JIS C 1901-1987). Functional specification SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, and C0. Conforms to protocol IEEE St’d 488.2-1987. ISO (ASCII) Addressable mode 0–30 Remote mode can be cleared using the LOCAL key (except during Local Lockout). Ethernet Communications (/C7 Optional) Number of communication ports 1 Connector type RJ-45 connector Electrical and mechanical specifications Conforms to IEEE 802.3. Transmission system Ethernet 100BASE—TX/10BASE-T Transmission rate 10 Mbps/100Mbps Protocol TCP/IP Supported Services FTP server,FTP client (network drive),LPR client (network printer), SMTP client (mail transmission), Web server, DHCP, DNS, Remote control Connector Type RJ-45connector 18 Serial (RS-232) Interface (/C2 Optional) Connector type Electrical specifications Connection type Communication mode Synchronization method Baud rate * Select USBport (PC) or RS-232 9-pin D-Sub (plug) Conforms with EIA-574 (EIA-232 (RS-232) standard for 9-pin) Point-to-point Full duplex Start-stop synchronization Select from the following. 1200,2400,4800,9600,19200 bps USB port(PC) (/C12 Optional) * Select USBport (PC) or RS-232 Connector Type B connector (receptacle) Electrical and Mechanical Specifications Conforms to USB Rev.1.1 Speed Max. 12 Mbps Number of Ports 1 Supported service Remote control Supported Systems Models with standard USB ports that run Windows 2000 or Windows XP with USB port as a standard. (A separate device driver is required for connecting to a PC.) USB port(Peripheral) (/C5 Optional) Connector Type A connector (receptacle) Electrical and Mechanical Specifications Conforms to USB Rev.1.1 Speed Max. 12 Mbps Number of Ports 2 Supported keyboards 104 keyboard (US) and 109 keyboard (Japanese) conforming to USB HID Class Ver.1.1devices Supported USB memory devices USB (USB memory) flash memory Power supply 5 V, 500 mA (per port) However, device whose maximum current consumption exceeds 100 mA cannot be connected simultaneously to the two ports. External I/O I/O Section for Master/Slave Synchronization Signals Connector type BNC connector: Both slave and master External Clock Input Section Connector type BNC connector Input level TTL Inputting the synchronization source as the Ext Clk of normal measurement. Frequency range Same as the measurement range for frequency measurement. Input waveform 50% duty ratio square wave Inputting the PLL source as the Ext Clk of harmonic measurement. Frequency range 10 Hz to 2.5 kHz Input waveform 50% duty ratio square wave Inputting the external sampling clock (Smp Clk) of wide bandwidth harmonic measurement. Frequency range 3000 times the frequency of 0.1 Hz to 66 Hz Input waveform 50% duty ratio square wave For Triggers Minimum pulse width Trigger delay time 1 µs Within (1 µs + 1 sample rate) PC Card Interface TYPE II (Flash ATA card) General Specifications Warm-up time Operating temperature: Operating humidity: Approximately thirty minutes. 5–40°C 20–80% (when printer not used), 35 to 80% RH (when printer is used) (No condensation may be present) Operating altitude 2000 m or less Storage environment: -25–60°C (no condensation may be present) Storage humidity: 20 to 80% RH (no condensation) Rated supply voltage 100–240 VAC Allowed supply voltage fluctuation range 90–264 VAC Rated supply frequency 50/60 Hz Allowed supply frequency fluctuation 48 to 63 Hz Maximum power consumption 150 VA (when using built-in printer) Weight Approximately 15 kg (including main unit, 4 input elements, and options) Battery backup Setup information and internal clock are backed up with the lithium battery DESCRIPTION Automatically select the appropriate calculation for each data updating period AC signals have waveforms that fluctuate repeatedly when viewed instantaneously. Therefore, measuring the power values of AC signals requires averaging for each period in a repeated interval, or averaging the data of several periods using a filtering process. The WT3000 automatically selects the appropriate calculation method (one of the above two methods) based on the data updating period. This approach ensures fast response and high stability as suitable for the particular measurement objective. data updating period is short or when measuring the efficiency of low-frequency signals. This method will not provide correct measurement values unless the period of the set synchronous source signal is accurately sensed. Therefore, it is necessary to check whether the frequency of the synchronous source signal has been accurately measured and displayed. See the user’s manual for notes on the synchronous source signal and frequency filter settings. When the data updating period is 50ms, 100ms, 5s, 10s, or 20s Measurement values are determined by applying an Average for the Synchronous Source Period (ASSP) calculation to the sample data within the data updating period. (Note that this excludes power integrated values WP, as well as current integrated value q in DC mode). With ASSP, a frequency measurement circuit is used to detect the input signal period set as the synchronous source. Sample data corresponding to an interval which is an integer multiple of the input period are used to perform the calculation. Based on its fundamental principles, the ASSP method allows measurement values to be obtained simply by averaging an interval corresponding to a single period, so it is useful in cases where the When the data updating period is 250ms, 500ms, 1s, or 2s Measurement values are determined by applying an Exponential Average for Measuring Period (EAMP) calculation to the sample data within the data updating period. With EAMP, the sample data are averaged by applying a digital filtering process. This method does not require accurate detection of the input period. EAMP provides excellent measurement value stability. * See page 12 of the specifications for information on the relationship between the data updating period and the lowest measurement frequency. Selecting formulas for calculating apparent power and reactive power There are several types of power––active power, reactive power, and apparent power. Generally, the following equations are satisfied: Active power P = UIcosØ (1) Reactive power Q = UIsinØ (2) Apparent power S = UI (3) In addition, these power values are related to each other as follows: 2 2 2 (Apparent power S) = (Active power P) + (Reactive power Q) (4) TYPE1 (method used in normal mode with older WT Series models) With this method, the apparent power for each phase is calculated from equation (3), and reactive power for each phase is calculated from equation (2). Next, the results are added to calculate the power. Active power: PΣ=P1+P2+P3 Apparent power: SΣ=S1+S2+S3(=U1×I1+U2×I2+U3×I3) Reactive power: QΣ=Q1+Q2+Q3 (= (U1×I1)2-P12 + (U2×I2)2-P22 + (U3×I3)2-P32 *S1, S2, and S3 are calculated with a positive sign for the leading phase and a negative sign for the lagging phase. U: Voltage RMS I: Current RMS Ø: Phase between current and voltage Three-phase power is the sum of the power values in the individual phases. These defining equations are only valid for sinewaves. In recent years, there has been an increase in measurements of distorted waveforms, and users are measuring sinewave signals less frequently. Distorted waveform measurements provide different measurement values for apparent power and reactive power depending on which of the above defining equations is selected. In addition, because there is no defining equation for power in a distorted wave, it is not necessarily clear which equation is correct. Therefore, three different formulas for calculating apparent power and reactive power for three-phase four-wire connection are provided with the WT3000. TYPE2 The apparent power for each phase is calculated from equation (3), and the results are added together to calculate the three-phase apparent power (same as in TYPE1). Three-phase reactive power is calculated from three-phase apparent power and three-phase active power using equation (4). PΣ=P1+P2+P3 Active power: Apparent power: SΣ=S1+S2+S3(=U1×I1+U2×I2+U3×I3) Reactive power: QΣ= S Σ2 -PΣ2 TYPE3 (method used in harmonic measurement mode with WT1600 and PZ4000) This is the only method in which the reactive power for each phase is directly calculated using equation (2). Three-phase apparent power is calculated from equation (4). PΣ=P1+P2+P3 Active power: Apparent power: SΣ= PΣ2 +QΣ2 Reactive power: QΣ=Q1+Q2+Q3 Accessories Instrument Carts. 701960 701961 Compact Instrument Cart Deluxe Instrument Cart 500 × 560 × 705 mm (WDH) /A: Keyboard and mouse mount 570 × 580 × 839 mm (WDH) /A: Keyboard and mouse mount Equipment not exceeding 450 (W) × 450 (D) × 400 (H) mm Top shelf Equipment not exceeding 450 (W) × 450 (D) × 300 (H) mm Top shelf Middle shelf Equipment not exceeding 450 (W) × 450 (D) × 300 (H) mm Bottom shelf Equipment not exceeding 450 (W) x 450 (D) × 400 (H) mm Bottom shelf Equipment not exceeding 450 (W) × 450 (D) × 240 (H) mm * W: Width D: Depth H: Height Maximum load: 50 kg on each shelf *The photo shows the mount holding a DL7400. * W: Width D: Depth H: Height Maximum load: 20 kg on each shelf 701962 External dimensions of Yokogawa power meters All-purpose Instrument Cart 467 × 693 × 713 mm (WDH) Top shelf Equipment not exceeding 457 (W) × 683 (D) mm Drawer Equipment not exceeding 610 (W) × 380 (D) mm Slide table Equipment not exceeding 380 (W) × 440 (D) mm * W: Width D: Depth Maximum load: 50 kg on each shelf WT3000 WT1600 WT210 WT230 PZ4000 (excluding protrusions) Width (mm) Height (mm) Depth (mm) Compact mount 701960 Deluxe mount 701961 General-purpose mount 701962 426 426 213 213 426 177 177 88 132 177 450 400 379 379 450 ✓ ✓ ✓ ✓ ✓*1 ✓ ✓ ✓ ✓ ✓*1 ✓ ✓ ✓ ✓ ✓*1 *1 The back-side inputs protrude beyond the back shelves of the mounts. * These mount do not conform to CE marking. 19 쮿Application Software Model and Suffix Codes Model 760122 쮿Precision Power Analyzer WT3000 Model Suffix Codes 760301 760302 760303 760304 Element number -01 -02 -03 -04 -10 -20 -30 -40 -SV Version -MV -M Power cord Options /G6 761922 Description WT3000 1 input element model WT3000 2 input elements model WT3000 3 input elements model WT3000 4 input elements model 2A input element Standard Version Motor Version UL/CSA standard Advanced Computation (IEC standard testing*, harmonic, FFT, Waveform computation) Built-in Printer /B5 /DT Delta Calculation Add-on Frequency Measurement /FQ 20ch D/A output /DA VGA Output /V1 /C2 Select Serial (RS-232) Interface /C12 one USB port (PC) /C5 USB port (Peripheral) /C7 Ethernet function /CC Cycle by Cycle /FL Voltage Fluctuation, Flicker * requires 761922 software Note: Mixing of the 30 A and 2 A input elements is not supported, whether purchasing a new unit or reworking an existing one. Also, the unit cannot be modified to change the current range. Adding input modules after initial product delivery will require rework at the factory. Please choose your models and configurations carefully, and inquire with your sales representative if you have any questions. 쮿Standard accessories Safety terminal adapter Power cord, Spare power fuse, Rubber feet, current input 758931 protective cover, User’s manual, expanded user’s manual, communication interface user’s manual, printer roll paper(provided only with /B5), connector (provided only with /DA) Safety terminal adapter 758931(provided two adapters in a set times input element number) * Cable B9284LK (light blue) for external current sensor input is sold separately. Safety terminal adapter 758931 is included with the WT3000. Other cables and adapters must be purchased by the user. Description Data acquisition software Order Q’ty 1 Standard-compliant measurement 1 쮿Rack Mount for 760301 model for 760302 model for 760303 model for 760304 model for 760301 model for 760302 model for 760303 model for 760304 model 30A input element Product WTViewer Software Harmonic/Voltage fluctuation/Flicker Measurement Software Model 751535-E4 751535-J4 Product Rack mounting kit Rack mounting kit Description For EIA For JIS 쮿Accessory (sold separately) Description Order Q’ty A set of 0.8m long, red and black test leads 1 Rated at 300V and used in a pair 1 Rated at 1000V and used in a pair 1 (spring-hold type) Two adapters to a set. 1 (screw-fastened type) Two adapters to a 1 set. 1.5 mm hex Wrench is attached 758921 Fork terminal adapter Banana-fork adapter. Two adapters to a set 1 Safety mini-clip Hook type. Two in a set 1 701959 Conversion adapter BNC-banana-jack(female) adapter 1 758924 366924 * BNC-BNC cable 1m 1 BNC-BNC cable 2m 1 366925 * External sensor cable Current sensor input connector. Length 0.5m 1 B9284LK B9316FX Printer roll pager Thermal paper, 10 meters (1 roll) 10 Due to the nature of this product, it is possible to touch its metal parts. Therefore, there is a risk of electric shock, so the product must be used with caution. * Use these products with low-voltage circuits (42V or less). Model/parts number 758917 758922 758929 758923 758931 Product Test read set Small alligator-clip Large alligator-clip Safety terminal adapter Safety terminal adapter 쮿Mounts Model 701960 Suffix and codes Description Compact mount /A 701961 Deluxe mount /A General-purpose mount 701962 Description 500*560*705mm(W, D, H) Key board and mouse table 570*580*839mm(W, D, H) Key board and mouse table 467*693*713mm(W, H, D) 쮿Current Sensor Unit Suffix code Description Single-phase DC to 100 kHz (-3 dB). -600 A to 0 A to +600 A (DC) -10 Three-phase U, V Basic accuracy:⫾(0.05% of rdg* + 40 mA) Superior noise withstanding ability and CMRR characteristic due to -20 Three-phase U, W optimized casing design -30 Three-phase U, V, W Supply voltage -1 100 V AC (50/60 Hz) -3 115 V AC(50/60 Hz) -7 230 V AC(50/60 Hz) Power card -D UL/CSA standard -F VDE standard -R SAA standard -J BS standard -H GB standard * 751523-10 is designed for WT3000, PZ4000 and WT1600. 751523-20 is designed for the WT2000, and WT200 Series. * 751521/751523 do not conform to CE Marking. Model 751521 751523 쮿Clamp on Probe / Current transducer Model Product Description 751552 Clamp-on probe 30 Hz to 5 kHz, 1400Apk (1000Arms) 751574 Current transducer DC to 100 kHz (-3dB), 600Apk * For detailed information, see Power Meter Accessory Catalog Bulletin 7515-52E Exterior unit : mm 426 13 32 427 32 20 177 13 YOKOGAWA ELECTRIC CORPORATION Communication & Measurement Business Headquarters /Phone: (81)-422-52-6768, Fax: (81)-422-52-6624 E-mail: tm@cs.jp.yokogawa.com YOKOGAWA CORPORATION OF AMERICA Phone: (1)-770-253-7000, Fax: (1)-770-251-6427 YOKOGAWA EUROPE B.V. Phone: (31)-33-4641858, Fax: (31)-33-4641859 YOKOGAWA ENGINEERING ASIA PTE. LTD. Phone: (65)-62419933, Fax: (65)-62412606 Subject to change without notice. [Ed : 03/b] Copyright ©2004 Printed in Japan, 702(KP) MS-16E

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