• YOKOGAWA

WT310
Digital Sampling Power Analyzer

Meter Current Range: 5mA to 20A,
Accuracy: 0.1% of rdg – Single-input element model
Yokogawa WT310 Power Meter

Features

  • Basic Accuracy of 0.1% of Reading
  • Low Current Measurement down to 50 micro-Amps
  • DC, 0.5 Hz to 100 kHz Frequency Range
  • Standard USB, and GPIB or RS232 Interfaces
  • Ideal for Production, Testing, Evaluation and R&D.
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Options

  • External sensor input
  • Harmonic Measurement
  • Frequency Measurement
  • Delta Computation
  • Integration measurements
  • Voltage, Current, and Active Power Measurements
  • apparent power (S), reactive power (Q), power factor (λ), and phase angle (Ø)

Applications

  • Production line or QA testing of electric Devices
  • Development and evaluation tool for home appliances
  • Testing to international standards, such as IEC62301, Energy Star and SPECpower
  • Evaluation testing of special waveform driven devices and distorted waveforms (including DC component)
  • Duration testing and efficiency measurement for industrial motors and rotating machinery
  • Conformance and evaluation testing of uninterruptable power supplies (UPS)

Description

The WT310 is a single phase, portable unit, with the capability of measuring low currents from 50 micro-Amps up to 20 Amps RMS and a voltage ranges from 15 to 600 Volts RMS. The WT310 was designed to accurately measure conversion circuits that use energy saving switching techniques, that can cause distorted voltage or current waveforms with high harmonic content. A high resolution sixteen bit Analog to Digital converter, a digitizing rate of 100 kS/s and a bandwidth from DC and 0.5 Hz to 100 kHz allow the WT310 to perform these complicated measurements with ease.

IIII [+] more

An optional Harmonic Analysis function is a must for design and test engineer in product evaluation and power quality testing. Normal power parameters and Harmonic data are measured simultaneously, providing faster, more accurate power analysis. Harmonic Analysis and THD Computations can be calculated up to the 50th order from a 50 or 60 Hertz fundamental frequency.

The Integration function measures Amp-Hour and Watt-Hour parameters. A new Auto Range feature has been added to the Integration, which is especially important for stand-by-power measurements. In the stand-by mode the current can be very low. Then when the device goes to operation mode, the current can increase substantially. The new Auto Range feature optimizes the range setting for maximum accuracy measurements. Yokogawa’s "Average Active Power" function makes it possible to measure power consumption under conditions where the power fluctuates greatly. Watt-hours are measured over some time period, then the time is divided out to leave an average power reading. This is the preferred method for Stand-by-Power measurements.

All industry standard communication interface ports such as USB, GPIB, RS232C and Ethernet are available for the WT300 Series of Power Meters. The standard interface is USB plus GPIB or RS232C, with Ethernet as an available option. Yokogawa’s WTViewer Free Plus software is provided with each WT300 unit. IEC62301 software for stand-by-power measurements is also available as a free download.

 
  • Literature
  • Specifications
  • Applications
  • Software
  • Accessories
Literature and Technical Information
pdf icon

Test and Measurement

++ WT300 Power Analyzer | Brochure (1.9 MB)
++ WT300 Power Analyzer | User’s Manual (7.2MB)
++ WT300 Power Analyzer | Communication Interface (4.3 MB)
++ WT300 Power Analyzer | USB Driver (5.7 MB)
Software
++ WTViewerFreePlus Software (5.7 MB)
Model: Yokogawa WT300 Series Power Meter
Model WT310
Power Measurement 1 element
Available with 20A input element
   
Basic power accuracy: 0.1% rdg +0.2% of range
Power frequency range: DC, 0.5 Hz to 100 kHz
Frequency range: 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, and 100 kHz. (autoranging
Sampling Speed: approximately 100 kS, s
Effective Input for V , A: 1% to 130%
Maximum Input for V , A: 1% to 140%
Inputs Crest Factor: Maximum 300
  Voltage
(for crest factor 3) 15V, 30V, 60V, 150V, 300V, 600V
(for crest factor 6) 7.5V, 15V, 30V, 75V, 150V, 300V
Direct Input: Current
(for crest factor 3) 5mA, 10mA, 20mA, 50mA, 100mA, 200mA, 0.5A, 1A, 2A, 5A, 10A, 20A
(for crest factor 6) 2.5mA, 5mA, 10mA, 25mA, 50mA, 100mA, 0.25A, 0.5A, 1A, 2.5A, 5A, 10A
External Input 1: Current Sensor
(for crest factor 3) 2.5V, 5V, 10V
(for crest factor 6) 1.25V, 2.5V, 5V
External Input 2: Current Sensor
(for crest factor 3) 2.5V, 5V, 10V or EX2: 50mV, 100mV, 200mV, 500mV, 1V, 2V
(for crest factor 6) 1.25V, 2.5V, 5V or EX2: 25mV, 50mV, 100mV, 250mV, 500mV, 1V
Measurement Parameters
Main: Voltage, current, active power, reactive power, apparent power, power factor, phase angle, frequency, peak voltage, peak current, crest factor, integration (Wh, Ah, varh, Vah), time, %
  MAX hold
Voltage RMS, MEAN simultaneous measurement
Average active power (user defined function)
Active power integration (WP) (Wh)
Apparent power integration (WS) (VAh)
Reactive power integration (WQ) (varh)
Display—-
Display: 7-segment LED, 4 items – Simultaneous display
Communication
  GP-IB Interface or Serial (RS-232) Interface (standard)
USB PC Interface (standard)
Ethernet Interface (optional)
Environment
Warm-up Time: Approx. 30 minute
Power supply: 100 VAC to 240 VAC rated, permitted 90 VAC to 264 VAC, 48 Hz to 63 Hz
Power consumption: Max 80 VA
Operating Temperature: Temperature: 5°C to 40°C
Temperature: −25°C to 60°C (storage)
Storage Temperature: Humidity: 20% RH to 80% RH (No condensation)
Dimensions: Approx. 213 (W) × 88 (H) × 379 (D) mm
Weight: Approx. 3 kg
Battery backup: Setup parameters are backed up with a lithium battery.

Production line or QA testing of electric Devices

  • Compact half rack mount size helps customers build smaller test systems with a better Return on Investment (ROI)
  • D/A output function for data recording
  • Multiple communication interfaces. USB, RS-232 or GP-IB and Ethernet capability.

The simultaneous measurement of power consumption parameters such as U, I, P, frequency, Power Factor and Harmonics for production line or QA testing results in reduced tact times. Thus testing is faster and cheaper. The DA output and communication interfaces enable data to be remotely and flexibly captured.

Development and evaluation tool for home appliances

  • 5mA range helps small current measurement
  • Auto ranging function under Integration mode
  • Range skip (range configuration) function provides the ability to select the usable ranges in advance. Auto ranging enables the WT300 series to rapidly adapt to changing input conditions

The range skip function reduces the range change transition period. The" "WT310 can measure both large and small currents accurately in a single test. This can reduce the total evaluation period or removes the need to use two rather than one power meters for the application, thereby saving capital cost."

Testing to international standards, such as IEC62301, Energy Star and SPECpower

  • The WT310 has a high measurement resolution of Max. 100μW under the 5mA range setting.
  • Simultaneous measurement of normal power parameters, harmonic components and THD.
  • Dynamic input capability of crest factor Max 300 (Peak value / minimum effective RMS value)
  • Free PCM software for IEC62301 testing

The WT310 together with the power consumption measurement (PCM) software enables users to perform standby power testing according to international standard

Evaluation testing of special waveform driven devices and distorted waveforms (including DC component)

  • DC, 0.5Hz to 100kHz broad bandwidth capability
  • Average active power measurement under integration mode

The WT300 series has a broad frequency capability of DC and from 0.5Hz to 100kHz. It can measure the RMS value of distorted waveforms like square waveforms or special waveform driven devices. The average active power measurement function gives accurate power consumption data for fluctuating power devices such as burst waveform operated devices. Therefore the customer can perform accurate distorted waveform measurements without using special mode settings.

Duration testing and efficiency measurement for industrial motors and rotating machinery

  • Integration measurement for long period
  • D/A output function for data recording
  • DC, 0.5Hz to 100kHz broad bandwidth capability

The WT300 series provides reliable current integration (Ah) and Energy (Wh) measurement for up to 10,000 hours (approx. 1 year). The D/A option is used to save and monitor the measurement results (WT310/WT310HC: 4ch, WT332/WT333: 12ch). An external recorder or data logger like, a ScopeCorder, can be used to save this D/A function data along with other parameters such as temperatures, torque and rotation speed.

Conformance and evaluation testing of uninterruptable power supplies (UPS)

  • Maximum order setting for THD calculations
  • Efficiency measurements using a single power meter
  • Average active power measurement under integration Mode

The WT300 series enables users to conduct conformity tests according to UPS performance testing standards. The WT300 series is used to measure and calculate input & output levels, the efficiency, frequency and THD. The average active power data also provides accurate values of power consumption. The WT300 series along with the WTViewerFreePlus software helps to simultaneously measure all the necessary parameters required to test a UPS thereby reducing the evaluation time.

Power Consumption Measuring Software

WTViewer is a software program that reads measured numerical, waveform, and harmonic data. Data can be transferred to a personal computer via GP-IB, Ethernet, or USB communications to display and store numeric or waveform data. A communications option can be installed in the WT300 as needed.

  • Waveform Display Measured data of input elements 1 to 3, and PΣ can be displayed on the PC screen via communication
  • Waveform Display Voltage and current waveforms can be monitored on the PC screen.
    You can confirm the voltage and current waveform shapes, waveform distortion, and other phenomena

WT300 Series Sample Program

These are sample program of Visual Basic, Basic net and C# for Communication interface GP-IB, Ethernet and USB for WT300 Series.

WTViewerFreePlus for WT300 Series (included)

The WTViewerFreePlus software can capture measured numeric values, harmonic values, and waveform data. The data can be transferred to a PC via a USB, GP-IB/RS-232 or Ethernet communication interface, and it can be displayed and saved onto the PC.

USB Drivers for WT300 Series

he USB Driver is needed when required by the software.

LabVIEW Drivers for WT300 Series

Data acquisition possible using LabVIEW. LabVIEW drivers can be downloaded from Yokogawa Web site. (free)

STANDARD ACCESSORIES
OPTIONAL ACCESSORIES (Brochure Download)
Cables
366924 — BNC cable BNC–BNC, 1 m — Qty 1 BNC cable BNC–BNC, 1 meter
366925 —BNC cable BNC–BNC, 2 m — Qty 1 BNC cable BNC–BNC, 2 meters
Adapter Sets, Leads
758917 —Measurement lead — Qty 1 75 cm, two leads (red and black) in a set
758921 —(Fork terminal adapter set) — Qty 1 4 mm fork terminal, banana terminal conversion, red and black (one each)
758922 — Alligator clip adapter (rated for 300 V) — Qty 1 Banana–alligator conversion, two in a set
758923 — Safety terminal adapter — Qty 1 (spring-hold type) Two adapters to a set.
758924— Conversion adapter — Qty 1 BNC-banana-jack(female) adapter
758931 — Safety terminal adapter — Qty 1 (screw-fastened type) Two adapters to a set. 1.5 mm hex Wrench is attached
  B9284LK —External sensor cable — Qty 1 Current sensor input connector. Length 0.5m
arrow 701961 — Deluxe Instrument Cart — Qty 1 Deluxe Cart
arrow 701962 — General-purpose Instrument Cart — Qty 1 General-purpose Cart
arrow 7511533-E4 — Rack Mount Kit — Qty 1 For EIA
arrow 7511534-E4 — Dual Rack Mount Kit — Qty 1 For EIA