The WT500 Power Analyzer excels at single- and three-phase power measurements. Standard features include a color TFT display and USB interface for communications and memory. The instrument has a basic power accuracy of 0.1%, maximum inputs of 1000 V, 40 A and a measurement bandwidth of DC to 100 kHz.
Intuitive control by using cursor keys in four different directions.
To reduce setting errors, menus display settings in order of relative importance in order.
Two USB ports for peripherals are installed for direct data saving (up to 1 G byte) in USB memory at shortest intervals.
The saved data can be opened in applications such as Excel.
* Excel is a registered trademark of Microsoft Corporation in the U.S.A.
In addition to numerical data, the WT500 can display input signal waveforms and trends (time variation of numerical data).
Bar graph display and vector display are also available with the harmonic measurement (/G5) option.
*1 Waveforms of up to approximately 5 kHz can be displayed.
*2 Excludes single-phase models.
Split screen display for numerical values and waveforms is not available.
Two efficiency calculations can be set by selecting input elements or output elements from a list.
|Example: η1 = PΣ/P1 x 100%
η2 = PΣ/P2 x 100%
Only necessary items within the measured data like voltage, current, and power can be saved in USB memory in binary or CSV format (up to 1 GB).
Files saved in CSV format can be opened in general-purpose applications such as Excel to allow displaying of data in graphs.
In addition to integration functions of active power (WP), current (q), reactive power (WQ), and apparent power (WS), a new feature provides measurement of bought and sold watt hours. Also, 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 is calculated by using user-defined settings.
GP-IB communication enables you to control the WT500 or transfer data from a PC.
Data can be transferred via Ethernet* communication.
It enables file transfers using an FTP server.
Current can be measured by using current clamps without disconnecting power supply wiring (voltage output type). By setting an external current sensor conversion ratio, it can support various types of current clamp-on probes.
By connecting to a monitor, you can create large displays of numerical values and waveforms. This function is convenient for simultaneously confirming data on multiple monitors, or to check data remotely.
This function enables simultaneous measurement of normal and harmonic data. Harmonic components of up to the 50th order can be measured. With the WT500 you can simultaneously confirm voltage, current, and the distortion factor (THD) as well as measure the distortion factor without switching modes.
|Harmonic Dual List||THD measurement|
This function allows you to calculate individual phase voltages and phase currents from the line voltages and phase currents measured in a three-phase, three-wire (3P3W) system. The phase voltage can be calculated from the line voltage measured with the three-phase, three-wire (3V3A) method. This is useful when you want to determine the phase voltage in a DUT with no neutral line by using the three-phase, three-wire (3V3A) method.
Note: This function cannot be installed on products with only one element.
In addition to the standard two channels of frequency measurement, an option is available for frequency measurement on all channels. This option provides frequency measurement of voltage and current on all channels with input elements 1 through 3 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.
Note: This function cannot be installed on products with only one input element.
Example of basic characteristics showing the WT500's high precision
Connection for the Measurement Cables and Adapters
|Product||Part no.||Specifications||Order quantity|
|Output connector||B8200JQ||D-SUB 9-pin, with 2 screws||1|
|Load resistors||B8200JR|| 10 Ω, 0.25 W x 4
Connect 4 in parallel to set resistance to 2.5 Ω.
Connection Diagram for Clamp-on Probe
*Don't connect and use the current input terminal and EXT terminal simultaneously.
AC/DC current sensors capable of highly accurate measurement starting in DC range.
For connection the external input of the WT3000 to the current sensor.
Safety-terminal-binding-post adapter. Use for circuits having voltage levels no greater than 42 V.
A set of 0.8m long red and black test leads, used in combination with a pair of optional 758922 or 758929 alligator-clip adapters.
Adapters for fitting a 4mm banana plug to a fork terminal. Set contains one black and one red clip. 1000 Vrms-CAT II.
Special AC-Input Clamp-on Probes for Large-current Hot Line Measurement
Rated at 300 V. Attaches to the 758917 test leads. Sold in pairs.
Two adapters in a set (spring-hold type).
For conversion between BNC and female banana plug
Applicable for DL750/DL750P, SL1000 & SL1400.
Rated at 1000V. Attaches to the 758917 test leads. Sold in pairs.
Screw-fastened adapters. Two adapters in a set. 1.5 mm Allen Wrench.
RACK MOUNTING KIT For an EIA-compliant Single-housing Rack
RACK MOUNTING KIT For an JIS-compliant Single-housing Rack
RACK MOUNTING KIT For an EIA-compliant Dual-housing Rack
RACK MOUNTING KIT For an JIS-compliant Dual-housing Rack
Photovoltaic power generation has gained attention in recent years, largely due to a new sense of urgency regarding the prevention of global warming.
Wind power is a renewable energy source that is being aggressively promoted (particularly in Europe) in order to reduce emissions of the greenhouse gasses that are responsible for global warming
Energy consumption in low-power and standby modes is an important issue due to increased awareness that energy resources are becoming limited and demand for energy-saving household electrical appliances continues to grow. IEC62301 Ed2.0 (2011) and EN 50564:2011 define standby mode as the lowest energy consumption of an appliance not performing its main function, when connected to the mains. IEC62301 Ed2.0 (2011) defines test methods and requirements for both the mains supply and the test equipment. It is crucial that design and test engineers choose highly accurate power measurement tools to confirm that their devices meet these requirements.
To evaluate AC adaptors, engineers must acquire the voltage.
If a product uses power, then power consumption and power quality measurements must be made as part of product design and test. These measurements are essential to optimize product design, comply with standards and provide nameplate information to customers.
This article will discuss best practices for making these measurements, starting with power measurement basics and proceeding to the types of instruments and associated components typically used to make measurements. The article will conclude with real-world examples, which apply the information imparted earlier in the article to solve practical measurement problems. Although most of us have been exposed to basic power measurement equations, a primer is helpful to summarize this information and to show how it applies to product design and test.
Prevention of global warming has become an issue in recent years, and industry is turning more and more toward stricter energy savings policies and the use of renewable energy.
In recent years the buzzword "all electric" is becoming popular, which refers to kitchen appliances, water heaters, and other devices in the home all being supplied with electric power.
These days people are talking about the problem of energy depletion, and the industry is turning more and more toward stricter energy savings policies and the use of renewable energy.
The Power Analyzer Accuracy and Basic Uncertainty Calculator from Yokogawa Test&Measurement helps users determine the uncertainty in voltage, current, and active power (watts) measurement values for various frequency ranges and wiring systems.
This training module covers the following topics:
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