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Model: Yokogawa WT500 Power Meter 
Model 
760201 
760203 
760203 
Number of elements 
1 element 
2 elements 
3 elements 
Available with 40A input element 


Basic power accuracy: 
0.1% of reading +0.1% of range 
DC power accuracy 
0.1% of reading +0.1% of range 
Power frequency range: 
DC, 0.5 Hz to 100 kHz 
V / A frequency range: 
100 kHz 
Sampling Speed: 
approximately 100 kS/s 
Accuracy range for V / A: 
1% to 110% 
Inputs 
Crest Factor: Maximum 300 

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) 
750m, 1.5, 3, 5, 7.5, 15, 30, 50, 75, 150, 300, 500V 
Direct Input: 
Current 
40 A input element 

(for crest factor 3) 
500 mA, 1 A, 2 A, 5 A, 10 A, 20 A, 40 A 
(for crest factor 6) 
250 mA, 500 mA, 1 A, 2.5 A, 5 A, 10 A, 20 A 
External Input: 
Current Sensor 
(for crest factor 3) 
50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V 
(for crest factor 6) 
25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, 5 V 
Data Memory 

Data memory: 
approximately 20 MB (internal), HDD 
Data Update 

Rate: 
100 m, 200 m, 500 m, 1, 2, 5 [S] 
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 
Power Consumption of Various Motor Loads 
Delta Calculation 
Voltage (V) 
difference, 3P3W ⇒ 3V3A, ΔY, YΔ 
Current (A) 
difference, 3P3W ⇒3V3A , ΔY, YΔ 
Power (W) 
Δ Y 
Harmonic Measurement in Normal Measurement 
Format 
PLL synchronization 
Frequency 
PLL source of fundamental frequency : 10 Hz–1.2 kHz. 
Window 
Rectangular 
FFT data length 
8192 
Display— 
Display: 
5.7inch VGA TFT color LCD, 640 × 480 dots (H × V) 
Waveform Display 
Numerical: 
Select 4, 8, 16, Matrix, ALL, Harmonic Single List, Harmonic Dual List, Custom

Bar: 
Displays the size of each harmonic in a bar graph 
Vector: 
Vector display of phase difference in fundamental waves of voltage and current 
Trend display: 
Number of measurement channels Up to 8 parameters
Displays trends (transitions) in numerical data of the measurement functions in a sequential line graph. 
Waveform: 
Displays the waveforms of voltage, current, torque, speed etc. 
Environment 
Power supply: 
100 to 90VAC/264 to 240VAC (automatic switching) — 50/60Hz 
Power consumption: 
Max 80 VA 
Operating Temperature: 
5 to 40°C, 20 to 80% RH 
Dimensions: 
Approximately 213 (W) x 177 (H) x 409 (D) mm 
Weight: 
Approx. 6.5 kg (main unit with 3 power modules installed) 
Simultaneous measurement of DC and AC signals
Evaluation of DC/AC signal conversion technology is critical in the renewable energy market. With input from 2 or more elements, the WT500 can measure DC and AC signals
simultaneously and calculate inputtooutput efficiency
Separate integration functions for charge/discharge and bought/sold power
The WT500 is equipped with integration functions that can not only evaluate charge and discharge current such as from secondary cells, but also bought and sold power in photovoltaic power generation systems.
WT series for power evaluation of energysaving equipment
 Power Evaluation
The WT series have been used as power meters for Green IT, Energy Star, CO_{2} reduction and other energysaving equipment. The WT500 supports your power evaluation
needs.
A Wide Variety of Display Formats
In addition to numerical data, the WT500 can display input signal waveforms and trends
(time variation of numerical data). Also bar graph display and vector display are available with the harmonic measurement (/G5) option.
 Harmonic
 Vector
 Waveform
 Trend (Capture efficiency changes visually)
 Display Harmonic Data as Bar Graphs, Vectors, and Lists
The harmonic measurements function is a standard feature on the WT500. It is capable of measuring waveforms with a fundamental frequency ranging from 0.5 Hz to 100 kHz , Analysis results up to the 100th order from 50/60 Hz. Fundamental waves can be displayed as numerical values or bar graphs. The WT500 can display harmonic measurement result as lists, and fundamental waves as vectors.
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A Variety of integration functions
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 intermittentcontrol instruments in which the power value fluctuates. Average active power is calculated by using userdefined settings.
 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 WT500 also has a new apparent power integration function (WS) and reactive power integration function (WQ).
 A wide effective input range for highprecision integration The WT500 has a wide effective input range, from 1% to 110% 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
Delta Calculation
— Harmonic components of up to the 50 th 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.
 Checking phase voltage when you measure line voltage
 Differential voltage/current:
Differential voltage and current between two elements are computed in the 3Ø – 3wire system.

 Line voltage/phase current:
Line voltage and phase current that are not measured are computed in the threephase 3Ø – 3wire system
 YΔ conversion:
Line voltage is computed from the phase voltage using the 3Ø – 3wire system data.
 ΔY conversion:
Phase to neutral is computed from the line voltage in the 3Ø – 3wire system (3V3A system)
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Frequency Measurement (/FQ)
 Checking the frequencies of all inputs 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.
Power Measurement for Renewable Energy
 Measurements of photovoltaic power consumption and power conversion efficiency
Photovoltaic power generation systems have been a focus of attention under the backdrop of the prevention of global warming. Thermal power generation and other forms of power based on the limited resources of oil and coal release environmentally harmful CO2, the main cause of global warming. On the other hand, because photovoltaic power generation does not release CO2, it is considered to be an important renewable energy resource for the future. The WT500 is capable of evaluating voltage, current, and power conversion efficiency by measuring DC signals and AC signals generated by photovoltaic power, a renewable energy source
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Large Current Measurements for Electrical Appliances
 Evaluating kitchen appliances such as induction hobs etc.
A large amount of current is applied and converted to heat in order to increase the output of IH cooking heaters. The WT500 can measure voltage, current, power, and total harmonic distortion (THD) by inputting the large current (up to 40 A) flowing to the IH cooking heater, without the need for a current sensor. Measurements can be taken faster, allowing for high speed acquisition of power data on manufacturing lines
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Evaluation and Testing of Home Electronics
 Measurement of kitchen appliances such as induction heat hobs etc. Power consumption reduction measures have been adopted in consumer appliances such as air conditioners and washing machines due to implementation of Energy Star. Control methods are used in home electronics in which consumed current is precisely controlled to reduce power consumption. The WT500 provides measurement of the fluctuating power consumption in these appliances
[Image]
Measuring Power Consumption of Various Motor Loads
 Industrial motor, pump and airconditioning fans The revolution speed of these motor & pump has to be controlled in order to save energy, therefore many inverterdriven motor & pump are used. The WT500 not only measures variation of voltage, current and power to evaluate performance of these motor & pump, but also enables you to examine energy efficiency by measuring integrated power
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Power Quality Evaluation and Testing of UPS
 Uninterrupted Power Supplies
These systems provide a stable power supply at all times even during power failures such as power outages, instantaneous power failures, voltage fluctuations, and frequency changes. The WT500 can calculate inputtooutput efficiency, power output, frequency, and distortion factor of the output waveforms from the UPS
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760122 WTViewer Software
WTViewer is a software program that reads measured numerical, waveform, and harmonic data. Data can be transferred to a personal computer via GPIB, Ethernet, or USB communications to display and store numeric or waveform data. A communications option can be installed in the WT500 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
LabVIEW Drivers
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
(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 
Conversion Adaptor 

751512—Safetyterminalbindingpost adapter— Qty 1
1.5 mm hex Wrench is attached

Current Sensor Units 

751521 — Singlephase — Qty 1
DC to 100 kHz (3 dB). 600 A to 0 A to +600 A (DC), accuracy: (0.05% of rdg* + 40 mA) Superior noise 

751522 — Threephase — Qty 1
DC to 100 kHz (3 dB). 600 A to 0 A to +600 A (DC), accuracy: (0.05% of rdg* + 40 mA) Superior noise 
Clampon Probes and Transducers 

751522 — Current transducer — Qty 1 DC to 100 kHz (3 dB), 600 Apk 

751574 — Clamp on Probe — Qty 1 30 Hz to 5 kHz, 1400Apk (1000Arms) 
Software 

760122 —WTViewer— For WT500 Software 
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 

7511533E4 — Rack Mount Kit — Qty 1 For EIA 

7511534E4 — Dual Rack Mount Kit — Qty 1 For EIA 
