 Literature
 Specifications
 Functions
 Optional Functions
 Software
 Acc.
Model: Yokogawa WT3000 Power Analyzer 

760301 
760302 
760303 
760304 
Number of elements 
1 input 
2 input 
3 input 
4 input 

Available with 2A or 30A input elements 


Basic power accuracy: 
0.02% of reading +0.04% of range 
DC power accuracy 
0.05% of reading +0.1% of range 
Power frequency range: 
DC, 0.1 Hz to 1 MHz 
V / A frequency range: 
1 MHz 
Sapmpling Speed: 
approximately 200 kS/s 
Accuracy range – V / A: 
1% to 130% 
Plugin inputs 
Crest Factor: Maximim 300 
Input type 
Floating input 
Resistive voltage divider 
Direct input: Shunt input External
input: Resistive voltage divider 

Voltage 
(for crest factor 3) 
15 V, 30 V, 60 V, 100 V, 150 V, 300 V, 600 V, 1000 V

(for crest factor 6) 
7.5 V, 15 V, 30 V, 50 V, 75 V, 150 V, 300 V, 500 V 
Direct Input: 
Current 
2 A input element 

(for crest factor 3) 
5mA, 10mA, 20mA, 50mA, 100mA, 200mA, 500mA, 1A, 2A 
(for crest factor 6) 
2.5mA, 5mA, 10mA, 25mA, 50mA, 100mA, 250mA, 500mA 
30 A input element 

(for crest factor 3) 
500 mA, 1 A, 2 A, 5 A, 10 A, 20 A, and 30 A 
(for crest factor 6) 
250 mA, 500 mA,1 A, 2.5 A, 5 A, 10 A, and 15 A 
External Input: 
Current Sensor 
(for crest factor 3) 
50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, and 10 V 
(for crest factor 6) 
25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, and 5 V 
A/D converter 
Simultaneous voltage and current conversion and 16bit resolution. Conversion speed (sampling rate): Approximately 5 μs 
Data Update 

Rate: 
50 m, 100 m, 200 m, 500 m, 1, 2, 5, 10, 20 [sec] 
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) 

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) 
Motor evaluation 
Torque, A / B / Z phase signal inputs (/MTR),4 inputs, & motor evaluation (opt 
Delta Calculation 
Voltage (V) 
difference, 3P3W ⇒ 3V3A, DELTA ⇒ STAR, STAR ⇒ DELTA 
Current (A) 
difference, 3P3W ⇒ 3V3A, DELTA ⇒ STAR, STAR ⇒ DELTA 
Power (W) 
DELTA ⇒ STAR 
FFT 
Number of points 
20,000 points or 200,000 points 
Window functions 
Rectangular, Hanning, or Flattop 
Measured parameters 
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
Type PS (power spectrum) 
Harmonic Measurement in Normal Measurement 
Format 
PLL synchronization method 
Frequency range 
Range in which the fundamental frequency of the PLL source is 10 Hz to 2600 Hz 
Measured parameters 
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
Type PS (power spectrum 
Window functions 
Rectangular 
FFT data length 
9000 with 32 bits processing word length 
Cyclebycycle measurement 
Synch source 
Select an external source of U1, I1, U2, I2, U3, I3, U4, or I4
parameters are measured continuously for each cycle of the one sync source signal 
No. of meas. 
103000 
Synch source frequency range 
1 Hz to 1000 Hz (for U and I)
0.1 Hz to 1000Hz (for external sync source) 
Accuracy 
U, I, P: Add [(0.3+2*f) % of rdg + ((0.05+0.05*f) % of range]
Add [(0.3+2*f)% of reading to accuracy 
Voltage Fluctuation/Flicker Measurement 
Type: 
Normal Flicker Measurement Mode
Measurement of dmax Caused by Manual Switching Mode
Items Common to Measurement Modes 
Number of measurements 
dc 
Relative steadystate voltage change 
dmax 
Maximum relative voltage change 
d(t) 
The time during which the relative voltage change during a voltage fluctuation period exceeds the threshold level 
Pst 
Shortterm flicker value

Plt 
Longterm flicker value 
Synch source frequency range 
1 Hz to 1000 Hz (for U and I)
0.1 Hz to 1000Hz 
Accuracy 
U, I, P: Add [(0.3+2*f) % of rdg + ((0.05+0.05*f) % of range] Add [(0.3+2*f)% of reading to accuracy 
Display 
Display: 
6.4inch color TFT liquid crystal display (640 x 480 px) 
Waveform Display 
Numerical: 
Select 4, 8, 16, all, single list, or dual list, display res: 600000 
Bar: 
Displays the size of each harmonic in a bar graph 
Vector: 
phase difference in the fundamental waves of voltage and current. 
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 
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. 
Builtin Printer (/B5 Option) 
Print type: 
Thermal line/dot matrix  8dot/mm, 112 mm [Effective print width: 104 mm] 
Environment 
Power supply: 
100 to 120VAC/220 to 240VAC (automatic switching) — 50/60Hz 
Power consumption: 
Max 150 VA (when using printer) 
Operating Temperature: 
5 to 40°C, 20 to 85% RH 
Dimensions: 
Approximately 426 (W) x 177 (H) x 450 (D) mm (including 253710 printer cover; does not include knobs and projections) 
Weight: 
Approx. 15 kg (main unit with four power modules installed) 
Simple and easy to use, Exceptional crisp display
The WT3000 was designed with userfriendly functions and controls in response to user requests for a simpler range setting operation and more userfriendly parameter setting display process
 Range settings using direct key input
The range indicator on the WT3000 is a sevensegment green LED, so the set range can be monitored at all times. The range can easily be switched using the up and down arrows.
 WT3000 item pages used to set display preferences
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.
[Image]
Wide range of standard functions
— The WT3000 is equipped with an array of sophisticated functions for precise and simultaneous measurements of the power conversion efficiency of instrument, as well as,
equipment evaluation efficiency by making simultaneous power evaluations and tests easier and faster.
 Display formats
The WT3000 lets you display input signal waveforms in addition to numerical value data. You don’t need to connect a special waveform analyzer to
check signal waveforms. The optional advanced computation function lets you display vectors and bar graphs for enhanced visual presentation
[Image]
 50ms data updating intervals
Fast updating allows you to precisely capture rapidly changing transient states. The WT3000 switches between two different calculation systems depending on the data updating interval
 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 TwoWattmeter Method*
In the twopower 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 twowattmeter method with a three phase, three wire (3V3A) system and adds the compensation value to the measured power. *Requires the delta computation option (/DT).
 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
 Userdefined function
As many as twenty userdefined formulas can be set in the WT3000. These equations can be used to calculate various parameters, such as mean active power
 A Variety of integration functions
 Active power, current, apparent power, reactive power
In addition to the active power integration function (WP) and current integrationfunction (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 highprecision integration
The WT3000 has a wide effective input range, from 1% to 130% of the measurement range.
 Average active power (using userdefined settings)
Average active power can be calculated over an integration interval. This feature is useful for evaluating the power consumed by intermittentcontrol instruments in
which the power value fluctuates
Motor Version (MV option)
— Motor evaluation: Rotating speed, Torque, SyncSp, Slip[%] and Motor output Pm
 Calculation of motor and total efficiency
In addition to the functions of the standard version, the new models offer powerful motor/inverter evaluation functions
 Voltage, current, and power measurement with torque and speed input
Measures torque meter and speed sensor output (analog or pulse output), and allows calculation of torque, revolution speed, mechanical power, synchronous speed, slip, motor
efficiency, and total efficiency in a single unit.
Advanced Computation (/G6)
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
Same as Harmonic Measurement Function /G5
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.
 IEC harmonic measurement mode (/G6)
Performing IEC harmonic standards tests
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.
 Voltage Fluctuation and Flicker Measurement (/FL)
Enables voltage fluctuation/flicker measurement conforming to IEC6100033. The following values related to voltage fluctuation that are stipulated by the IEC61000
33 standard can be calculated from the measured data: dc (relative steadystate voltage change), dmax (maximum relative voltage change), dt (relative voltage
change time), shortterm flicker value Pst, longterm 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.
 Delta Calculation (/DT)
Checking phase voltage when you measure line voltage
This function allows you to calculate individual phase voltages from the line voltage measured in a threephase, threewire (3V3A) system. RS line voltage can be
calculated in systems measured from a threephase, threewire 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.
 Cycle by Cycle Measurement (/CC)
Capturing cyclebycycle fluctuations
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.
 Added Frequency Measurement (/FQ)
Checking the frequencies of all inputs
In addition to the standard two channels of frequency measurement, a sixchannel 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
 D/A Output (/DA)
 20 Channels
Measured values and calculated value by userdefined 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 loggers
WTViewer for WT3000 Series
The measurement procedures and settings for harmonic/flicker standards testing have been precisely defined. Engineers must also stay current with the specialized knowledge and uptodate
information required to periodically review the contents of the standards and perform the standards conformance tests. The model 761922 Harmonic/Flicker Measurement Software enables
engineers without specialized knowledge to perform a range of operations using the WT3000 Precision Power Analyzer including judging standards compliance and outputting test reports.
 Harmonics
EN6100032 / IEC6100032
Limits for harmonic current emissions of the latest Edition
(Equipment i rated current of 16 A per phase or less)
EN61000312 / IEC61000312
Limits for harmonic current emissions
(Equipment rated current is of 75 A per phase or less, and more than 16 A per phase)
 Voltage fluctuation/flicker
EN6100033 / IEC6100033
Limitation of voltage fluctuations and flicker
(Equipment rated current of 16 A per phase or less, and not subject to conditional)
EN61000311 / IEC61000311
Limitation of voltage fluctuations and flicker supply systems
(Equipment rated current of 75 A or less, and subject to conditional)
 IEC6100047 1991(window widths of 16 cycles), IEC6100047 2002(Harmonic and interharmonic measurement supporting window widths of 50 Hz/60 Hz, 10/12 cycles)
 Viewing Trends
You can capture various types of data measured into your PC at 200ms fixed intervals. Thus, you can view trends graphically. This feature lets you monitor power
supply voltage fluctuations, changes in current consumption and other timebased variations.
 Harmonic Current Measurement Value List
Displays harmonic measurement data as a single list.
 Harmonic Current Bar Graph
Evaluates whether harmonic data is within the standard limit value, and displays the result as a bar graph. The display of evaluation results is colorcoded, in colors such as red and blue.
 Measurement Value Judgement Graph
Measures the harmonic current over the set observation time, and evaluates it in conformance with the standard. Evaluation results are displayed as PASS or FAIL
 Waveform Observation
Lets you display voltage or current signal waveforms, and measure frequencies and peak values. Moving the cursor lets you display values for the displayed waveform.
 Automatic Report Generation
You can print harmonic measurement results as value lists and graphs, and save image data. Titles and comments can be entered in reports, letting you enter
information such as measurement dates/times, device names or control numbers.
Voltage Fluctuation and Flicker Measurement
 Measured Value and Judgment for Each Observation Period
(Normal Voltage Fluctuation and Flicker Measurement)
 The final values of dc, dmax, and d(t) are compared with the respective limits, and the judgment (pass or fail) is displayed to the right of the final value. If
a steadystate condition does not occur during the measurement period, it is considered to be a fluctuating condition. The measurement result of dc is displayed as Undef
(undefined), and the judgment of dc is displayed as Error
 The shortterm flicker value, Pst, is calculated, compared to the limit, and the judgment (pass or fail) is displayed.
 Displaying the Trend Graph
You can show Trend Graph View. You can select from the following measurement functions.
 Displaying the CPF Graph
You can select the element and color to be displayed on the CPF graph.
Up to four elements can be displayed simultaneously. You can set a separate color for each element.
 Printing
You can create reports using the data measured with the software.
System Configuration for 1Ø and 3Ø
[Image]
STANDARD ACCESSORIES 
OPTIONAL ACCESSORIES (Brochure Download) 
Plugin modules 

751521 — Power Measurement Module — With Safety Terminals DC to 100 kHz (3 dB). 600 A to 0 A to +600 A (DC,) ±(0.05% of rdg* + 40 mA)
— Singlephase 

751523 — Power Measurement Module — With Safety Terminals DC to 100 kHz (3 dB). 600 A to 0 A to +600 A (DC,) ±(0.05% of rdg* + 40 mA)
— Threephase U, V, Threephase U, W, Threephase U, V,Threephase U, V 
BNC 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 

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
(springhold type) Two adapters to a set. 

758924— Conversion adapter — Qty 1
BNCbananajack(female) adapter 

758931 — Safety terminal adapter — Qty 1
(screwfastened type) Two adapters to a set. 1.5 mm hex Wrench is attached 

701959 — Safety miniclip — Qty 1
Hook type. Two in a set 
Clamp on Probe / Current transducer 

751552 — Clampon probe — Qty 1
30 Hz to 5 kHz, 1400Apk (1000Arms) 

751574 —Current transducer — Qty 1
DC to 100 kHz (3dB), 600Apk 
Software 

760122 —WTViewer— For WT3000 Software 

7601922 —Harmonic/Voltage fluctuation/Flicker Measurement Software— For WT3000 Standardcompliant measurement  (IEC 600032) – (IEC 6000312) – (IEC 600033) 
Miscellaneous 

B9316FX — Printer roll pager — Qty 1 Thermal paper, 10 meters (1 roll) 

B9284LK —External sensor cable — Qty 1
Current sensor input connector. Length 0.5m 

701960 — Compact Instrument Cart — Qty 1 Compact Cart 

701961 — Deluxe Instrument Cart — Qty 1 Deluxe Cart 

701962 — Generalpurpose Instrument Cart — Qty 1 Generalpurpose Cart 
