World-class Accuracy, Stability, and Versatility
Measuring true power is more than multiplying voltage and current. Advances in complex power electronics and energy efficiency create measurement challenges that can confound even the most experienced engineers.
Unlike data acquisition and oscilloscope-based power measurement tools, power analyzers are purpose-built to guarantee measurement accuracy when testing devices that generate, transform, or consume electricity.
Yokogawa, the world's leading supplier of electrical power analyzers, provides solutions for testing power electronics, inverters, motors and drives, lighting, home appliances, office equipment, power supplies, industrial machinery and more.
Measure Power with Confidence
- Guaranteed accuracy across a wide range and bandwidth
- The preferred choice of standards organizations
- A solution for every application
- Extensive educational resources
10+1 Reasons to Choose a Yokogawa Power Analyzer
Application Note
Power analyzers and power meters measure electrical power in devices that generate, transform, or consume electricity. Since they offer the accuracy, frequency ranges, and functions necessary to meet industry test and measurement standards, they have been used for decades in electrical product testing applications. More than simply watt meters, these instruments make true power measurements using matched voltage and current input circuits. This application note discusses the top 10 reasons, plus one, to select a Yokogawa power analyzer.
Read the App Note
| Model | WT300E | WT500 | WT3000E | WT1800E | PX8000 | WT5000 |
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| Number of Input Channels | 1, 2 or 3 | 1 - 3 | 1 - 4 | 1 - 6 | 1 - 4 | 1 - 7 |
| Basic Power Accuracy (60 Hz) | 0.1% of Reading + 0.05% of Range |
0.1% of Reading + 0.1% of Range | 0.01% of Reading + 0.03% of Range |
0.05% of Reading + 0.05% of Range |
0.1% of Reading + 0.1% of Range | 0.01% or Reading + 0.02% of Range |
| Bandwidth | DC, 0.1 Hz to 100 kHz | DC, 0.1 Hz to 100 kHz | DC, 0.1 Hz to 1 MHz | DC, 0.1 Hz to 1 MHz | DC to 20 MHz | DC to 1 MHz |
- Industry best measurement accuracy you can trust
- Up to 7 swappable input elements plus 4 motor inputs for electrical and mechanical power and efficiency measurements
- Harmonics test compliant to IEC 61000-3-2
- High Accuracy Electrical & Mechanical Efficiency of Inverters and Motors in EV and HEV
- IEC Harmonics (IEC61000-3-2 & IEC61000-3-12); Voltage Fluctuations and Flicker (IEC61000-3-3 & IEC61000-3-11)
- Power, Harmonics (THD) Measurements (up to 500th order)
- Electrical & Mechanical Efficiency of Inverters and Motors in EV and HEV
- Power and Harmonic (THD) Measurements with Independent Range Controls
- Efficiency measurements of AC/DC or DC/AC Inverters & Motors
- Standby Power Measurements, Energy Star®, SPEC Power® and IEC62301/EN50564
- Evaluation and Testing of Batteries, Home Appliances and Uninterruptible Power Supplies (UPS)
- Transient/Start-up Waveform Capture & Power Analysis
- Harmonics, Cycle by cycle and FFT analysis
The Yokogawa CW500 is a portable power analyzer that logs transient power phenomena in addition to measuring single to three phase power.
Yokogawa's Power Analyzer software manages numeric, waveform, and harmonic data measurements. It enables data logging and instrument configuration from your computer.
Accessories for digital power analyzers include various voltage and current transformers, clamp-on current probes, and a selection of test leads.
Current transformers are used to step down high AC and DC currents to a lower level that can be measured directly by the power analyzer.
This panel-mounted power meter and energy meter with a large, three-row LED display integrates all the measuring functions required for power management in locations such as factories and buildings into a single unit.
Conditions
Input Channels >= Frequency >= ADC Resolution >= ADC Sampling rate >= Voltage >=
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Model Code
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WT5000
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WT1801E to WT1806E
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WT3001E to WT3004E
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760201 to 760203
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WT310E
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WT310EH
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WT332E/WT333E
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PX8000
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CW500
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Number of Input Channels
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Max. 7
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WT1801E: 1 WT1802E: 2 WT1803E: 3 WT1804E: 4 WT1805E: 5 WT1806E: 6
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WT3001E: 1 WT3002E: 2 WT3003E: 3 WT3004E: 4
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760201: 1 760202: 2 760203: 3
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1
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1
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WT332E: 2 WT333E: 3
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Max. 4
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With the same voltage; Single-phase 2-wire: 4 systems, single-phase 3-wire: 2 systems, three-phase 3-wire 2-current: 2 systems
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Basic Power Accuracy (50/60 Hz)
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0.01% of reading + 0.02% of range
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0.05% of reading + 0.05% of range
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0.01% of reading + 0.03% of range
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0.1% of Reading + 0.1% of range
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0.1% of reading + 0.05% of range
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0.1% of reading + 0.05% of range
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0.1% of reading + 0.05% of range
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0.1% of Reading + 0.1% of range
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±(0.8% rdg + 0.2% rng) when using clamps 96061, 96062, 96063, 96064, ±(1.1% rdg + 0.2% rng) when using clamp 96065, ±(1.3% rdg + 0.2% rng) when using clamp 96066,
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Power Frequency Range
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DC and 0.1 Hz to 1 MHz
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DC and 0.1 Hz to 1 MHz
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DC and 0.1 Hz to 1 MHz
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DC and 0.5 Hz to 100 kHz
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DC and 0.1 Hz to 100 kHz
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DC and 0.1 Hz to 20 kHz
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DC and 0.1 Hz to 100 kHz
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DC and 0.1 Hz to 1 MHz
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45 to 70Hz
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A/D Converter
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18-bit Max. 10 MS/sec
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16-bit 2 MS/sec
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16-bit 200 kS/sec
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16-bit 100 kS/sec
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16-bit 100 kS/sec
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16-bit 100 kS/sec
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16-bit 100 kS/sec
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12-bit Max. 100 MS/sec
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Voltage Ranges
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1.5/ 3/ 6/ 10/ 15/ 30/ 60/ 100/ 150/ 300/ 600/ 1000 V (crest factor CF3)
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1.5/ 3/ 6/ 10/ 15/ 30/ 60/ 100/ 150/ 300/ 600/ 1000 V (crest factor3)
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15/ 30/ 60/ 100/ 150/ 300/ 600/ 1000 V (crest facter 3)
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15/ 30/ 60/ 100/ 150/ 300/ 600/ 1000 V (crest facter 3)
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15/ 30/ 60 /150/ 300/ 600 V (crest facter 3)
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15/ 30/ 60 /150/ 300/ 600 V (crest facter 3)
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15/ 30/ 60 /150/ 300/ 600 V (crest facter 3)
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1.5/ 3/ 6/ 10/ 15/ 30/ 60/ 100/ 150/ 300/ 600/ 1000 V(crest facter 3)
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600V, 1000 V
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Current Ranges
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Direct input (5 A element): 5 m/ 10 m/ 20 m/ 50 m/ 100 m / 200 m/ 500 m / 1/ 2/ 5 A (crest factor CF3) External current sensor input - 50 m/ 100 m/ 250 m/ 500 m / 1/ 2.5/ 5/ 10 V (crest factor CF3) Direct input (30 A element): 0.5/ 1/ 2/ 5/ 10/ 20/ 30 A (crest factor CF3) External current sensor input - 50 m/ 100 m/ 250 m/ 500 m / 1/ 2.5/ 5/ 10 V (crest factor CF3)
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Direct input (5 A element): 10 m/ 20 m/ 50 m/ 100 m / 200 m/ 500 m / 1/ 2/ 5 A (crest factor3) External current sensor input - 50 m/ 100 m/ 250 m/ 500 m / 1/ 2.5/ 5/ 10 V (crest factor3) Direct input (50 A element): 1/ 2/ 5/ 10/ 20/ 50 A (crest factor3) External current sensor input - 50 m/ 100 m/ 250 m/ 500 m / 1/ 2.5/ 5/ 10 V (crest factor3)
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Direct 30A input 0.5/ 1/ 2/ 5/ 10/ 20/ 30 A (crest factor3) Direct 2A input 5m/ 10m/ 20m/ 50m/ 100m/ 200m/ 500m/ 1/ 2 A (crest factor3) External sensor input: 50/ 100/ 200/ 500 m/ 1/ 2/ 5/ 10 V (crest factor3)
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Direct input: 0.5/ 1/ 2/ 5/ 10/ 20/ 40 A (crest facter 3) External input (optional): External input - 50 m/ 100 m/ 200 m/ 500 m / 1/ 2/ 5/ 10 V (crest facter 3)
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Direct input: 5 m / 10 m/ 20 m/ 50 m/ 100 m/ 200 m/ 500 m/ 1/ 2/ 5/ 10/ 20 A (crest facter 3) External input (optional): 2.5/ 5/ 10 V or 50 m/ 100 m/ 200 m/ 500mV/ 1/ 2 V (crest facter 3)
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Direct input: 1/ 2/ 5/ 10/ 20/ 40 A (crest facter 3) External input (optional): 2.5/ 5/ 10 V or 50 m/ 100 m/ 200 m/ 500mV/ 1/ 2 V (crest facter 3)
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Direct input: 0.5/ 1/ 2/ 5/ 10/ 20 A (crest facter 3) External input (optional): 2.5/ 5/ 10 V or 50 m/ 100 m/ 200 m/ 500mV/ 1/ 2 V (crest facter 3)
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Direct input: 10 m/ 20 m/ 50 m/ 100 m/ 200 m/ 500 m/ 1/ 2/ 5 A(crest facter 3) External input: 50 m/ 100 m/ 200 m/ 500mV/ 1/ 2/ 5/ 10 V(crest facter 3)
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96060 (2A) 2000mA *Leakage current only 96061 (50A) 5000mA/50.00A/AUTO 96062 (100A) 10A/100A/AUTO 96063 (200A) 20A/200A/AUTO 96064 (500A) 50A/500A/AUTO 96065 (1000A) 100A/1000A/AUTO 96066 (3000A) 300A/1000A/3000A
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Continuous Allowable Max. Input Voltage
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Peak voltage of 1.6 kV or RMS of 1.5 kV, whichever is lower
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Peak voltage of 2 kV or RMS of 1.1 kV, whichever is lower
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The peak is 1.6 kV, or the RMS of 1.1kV, whichever is less.
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The peak is 1.5 kV, or the RMS of 1kV, whichever is less.
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Peak voltage of 1.5 kV or RMS of 1.0 kV, whichever is lower
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Peak voltage of 1.5 kV or RMS of 1.0 kV, whichever is lower
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Peak voltage of 1.5 kV or RMS of 1.0 kV, whichever is lower
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Peak voltage of 2 kV or RMS of 1.1 kV, whichever is lower
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1200 Vrms
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Continuous Allowable Max. Input Current
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Direct input (5 A element): Peak current of 10 A or RMS of 7 A (whichever is lower.), Direct input (30 A element): Peak current of 90 A or RMS of 33 A (whichever is lower.) External Current Sensor Input - Peak not to exceed 5 times range-value or 25 V (whichever is lower)
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Direct input (5 A element): Peak current of 10 A or RMS of 7 A (whichever is lower.), Direct input (50 A element): Peak current of 150 A or RMS of 55 A (whichever is lower.) External Current Sensor Input - Peak not to exceed 5 times range-value
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30A direct input: The peak is 90 A, or RMS is 33 A, whichever is less. 2A direct input: The peak is 6 A, or RMS is 2.2 A, whichever is less. Current sensor input: The peak is not to exceed 5 times the range
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Direct input: The peak is 100 A, or RMS is 45 A, whichever is less. External input: The peak is 5 times the range or less.
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Direct input: 5-200 mA Peak current of 30 A or RMS of 20 A (whichever is less.), 0.5-20 A Peak current of 100 A or RMS of 30 A (whichever is less.) External input: Peak value of 5 times range or less.
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Direct input: 1-20 A Peak current of 100 A or RMS of 44 A (whichever is less.) External input: Peak value of 5 times range or less.
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Direct input: 0.5-20 A Peak current of 100 A or RMS of 30 A (whichever is less.) External input: Peak value of 5 times range or less.
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Direct input: 8.5 A Peak or RMS of 6 A (whichever is less.) External input: Peak value of 4 times range or less.
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96060 (2A) 60Arms 96061 (50A) 130Arms 96062 (100A) 100Arms 96063 (200A) 250Arms 96064 (500A) 500Arms 96065 (1000A) 1300A 96066 (3000A) 3600A
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Display Type
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10.1-inch color TFT LCD with touch screen
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8.4-inch color TFT LCD
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8.4-inch color TFT LCD
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5.7-inch TFT color LCD
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7 segment LED 4 displays
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7 segment LED 4 displays
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7 segment LED 4 displays
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10.4 inch color TFT LCD
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3.5-inch TFT color LCD (320 x 240 Pixel)
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Measuring Items
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U, I, P, S, Q, Power factor, Frequency, Efficiency, Phase angle, Upk, Ipk, f, Wp, q, CF, FF, Impedance, Rs, Rp, Xs, Xp, Pc, Harmonic, Fundamental values
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U, I, P, S, Q, Power factor, Efficiency, Phase angle, Upk, Ipk, f, Wp, q, CF, FF, Impedance, Rs, Rp, Xs, Xp, Pc, Harmonic
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U, I, P, S, Q, PF, efficiency, phase angle, Upk, Ipk, f, CF, FF, Impedance, Rs, Rp, Xs, Xp, Pc, Harmonic
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U, I, P, S, Q, PF, efficiency, phase angle, Upk, Ipk, f, CF, Harmonic
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U, I ,P, S, Q, PF,phase angle, Upk, Ipk, UHz, IHz, Wh, q, CF,Harmonic
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U, I ,P, S, Q, PF,phase angle, Upk, Ipk, UHz, IHz, Wh, q, CF,Harmonic
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U, I, P, S, Q, PF,phase angle, efficiency, Upk, Ipk, UHz, IHz, Wh, q, CF,Harmonic
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U, I, P, S, Q, Power factor, Efficiency, Phase angle, Upk, Ipk, f, CF, FF, Impedance, Rs, Rp, Xs, Xp, Pc, Harmonic, THD and 24 waveform parameters
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U, I, f, P, S, Q, Active energy, Reactive energy, Apparent energy, Pf, Phase Advancing Condensor, Neutral current, Demand, Harmonics, Power Quality (Swell/ Dip/ Interrupt/ Transient overvoltage, Inrush current, Unbalance rate. IEC flicker)
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Storages
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External USB memory, 2 GB Internal Memory (optional 32 GB inernal memory)
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External USB memory, 32 MB Internal Memory
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PC card, USB memory, 30MB Internal Memory
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USB memory, 20MB Internal Memory
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Internal memory normal measurement: Max 9000 blocks, normal + harmonic measurement: Max 700 blocks
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Internal memory normal measurement: Max 9000 blocks, normal + harmonic measurement: Max 700 blocks
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Internal memory normal measurement: WT332E: Max 4000 blocks WT333E: Max 3000 blocks, normal + harmonic measurement: WT332E: Max 300 blocks WT333E: Max 200 blocks
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USB memory and SD memory card
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SD Card (2 GB)
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Interface
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GP-IB, Ethernet, and USB
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GP-IB, Ethernet, and USB
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GP-IB, RS-232, USB, Ethernet
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GP-IB, USB, Ethernet
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USB, GP-IB or RS-232
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USB, GP-IB or RS-232
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USB, GP-IB or RS-232
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GP-IB, Ethernet and USB
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USB, Bluetooth
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Optional Features
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32 GB Internal Memory, 20-channel D/A output, Motor Evaluation Function 1, Motor Evaluation Function 2(requires select of Motor Evaluation Function 1)
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External Current Sensor Input, Built-in printer, Harmonic Measurement, Dual Harmonic Measurement, RGB Output, 20-channel D/A output, Motor Evaluation Function, Auxiliary Inputs, Power supply for external current sensors
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Built-in printer, Advanced calculation, D/A output, VGA output, RS-232, Ethernet, USB port (Peripheral), USB port (PC), Flicker measurement, Motor evaluation function
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harmonic measurement, VGA output, external input, delta calculation, GP-IB, Ethernet
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Ethernet interface, D/A output (4 channels), harmonic measurement, External current sensor input *Ethernet interface supports Modbus/TCP
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Ethernet interface, D/A output (4 channels), harmonic measurement, External current sensor input *Ethernet interface supports Modbus/TCP
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Ethernet interface, D/A output (12 channels), harmonic measurement, External current sensor input *Ethernet interface supports Modbus/TCP
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Built-in printer, IRIG, Harmonic Measurement, 50M/CH Memory, 100M/CH Memory and Probe power (4-output), Power supply for external current sensors
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Dimensions (W x H x D)
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426 x 177 x 496 mm
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426 x 177 x 459 mm 426 x 221 x 459 mm (/PD2 option)
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426 x 177 x 491 mm
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213 x 177 x 409 mm
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213 x 88 x 379 mm
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213 x 88 x 379 mm
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213 x 132 x 379 mm
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355 x 259 x 180 mm 355 x 259 x 245 mm (/PD2 option)
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120 x 175 x 68mm
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Max. Weight
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Approx. 12.5 kg (including /M1,/ MTR1 and /DA20 options without any input element)
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WT1801E: Approx.11.6 kg WT1802E: Approx.12.3 kg WT1803E: Approx.13 kg WT1804E: Approx.13.6 kg WT1805E: Approx.14.3 kg WT1806E: Approx.15 kg /PD2 option WT1801E: Approx.13.6 kg WT1802E: Approx.14.3 kg WT1803E: Approx.15 kg WT1804E: Approx.15.6 kg WT1805E: Approx.16.3 kg WT1806E: Approx.17 kg
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WT1801E: Approx.12 kg WT1802E: Approx.13 kg WT1803E: Approx.14 kg WT1804E: Approx.15 kg
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760201: Approx.5.5 kg 760202: Approx.6.0 kg 760203: Approx.6.5 kg
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Approx. 3 kg
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Approx. 3 kg
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Approx. 5 kg
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Approx. 6.5 kg Approx. 7.5kg (/PD2 option)
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Approx. 0.9 kg (with battery)
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What is a Power Analyzer? Power analyzers and power meters measure electrical power in devices that generate, transform, or consume electricity.
The accuracy of a measurement instrument varies with the range over which a reading is measured. Not all instrument manufacturers specify accuracy and ranges in the same manner. This article explores the impact of range definitions on measurement accuracy and how one can be mindful when comparing accuracy across instruments.
In this application note you will learn when and how to use different methods to connect a current transformer to a power analyzer.
We have developed the WT3000 Precision Power Analyzer, which features the world's highest measurement accuracy of ±0.02% of reading and a measurement bandwidth of 0.1 Hz to 1 MHz as well as DC signals.
This article looks at some of the factors that can affect the accuracy of power measurements and shows how users can address the challenges presented by the need for accurate energy-efficiency testing.
Government agencies that define the standardization of energy efficiency metrics continue to be a driving force behind the development of the next generation electric vehicle powertrains. These metrics require manufacturers to have high confidence in their measurements and motivate the optimization of efficiency.
This white paper discusses the basics of AC, DC, and power measurements, and a three-step process for making precision electrical and mechanical power measurements on a variety of motors and variable frequency drive (VFD) systems. It is also shown how these measurements are used to calculate the energy efficiency for motor and drive systems.
The objective of this paper is to show the close relationship between efficiency and power quality, and provide education on the causes of power quality, types of power quality issues, and provide guidance on measurement considerations.
Yokogawa developed the PX8000 precision power scope, a high-accuracy power meter, which can measure reactor losses in inverters, motors and the like, by analyzing waveforms. The major specifications of the instrument are as follows: basic accuracy is 0.2%, voltage measurement bandwidth is DC and 0.1 Hz to 20 MHz (-3dB, typical), and current measurement bandwidth is DC and 0.1 Hz to 10 MHz (-3dB, typical). The PX8000 offers the functionality usually provided by a waveform measuring instrument, such as a variety of triggers, tracking, statistical processing, and waveform parameter calculation functions. Furthermore, to improve measurement accuracy at low power ratios this product comes with a de-skew function for correcting signal delays from the current sensor and a data latency adjustment function. This paper describes the PX8000, focusing on a newly developed element dedicated for power measurement and technology for phase correction.
This white paper describes the WT1800, a precision power analyzer that has been replaced by the WT1800E, a unit with numerous improvements including better accuracy. Please visit the WT1800E product page to learn more about the WT1800E.
To keep pace with the increasing speed of switching devices in inverters, Yokogawa has developed the WT1800 precision power analyzer with 10 times faster sampling speed and 5 times wider frequency bandwidth compared with previous models. Its basic accuracy is 0.15% and the frequency bandwidth of voltage and current is 0.1 Hz to 5 MHz (-3 dB, Typical) including the DC component. With up to six inputs, a single WT1800 unit can measure the efficiency of three-phase inverters. In addition, the high-speed data capturing mode allows the WT1800 to measure transient power. This paper describes the high-speed, real-time power measurement technologies underlying these functions.
We have added a harmonics current/flicker measuring function to the WT3000 Precision Power Analyzer with world-leading accuracy of power measurement. We have also created PC software for harmonics current/flicker measurement. This PC software and the WT3000 comply with the IEC61000- 3-2 harmonics current standard and IEC61000-3-3 voltage fluctuation/flicker standard, thus enabling the electrical power, harmonics current and flicker of electrical equipment to be measured precisely with a single unit. This paper outlines the harmonics current standard and voltage change/flicker standard, along with the measurement principle and PC-based software of the WT3000.
If the PR300 will power on, but doesn't respond when pressing the buttons, check the power supply and make sure it's being powered by 130-300 VDC or 100-240 VAC.
To use the data streaming feature, make sure you have a fixed voltage and current range. Data streaming will not work if the voltage and current are set to auto range.
The circuit design for the line filters used on the WT & PZ series instruments are similar to Butterworth filters but have been redesigned. We redesigned the original filtering characteristic to obtain a ...
When making a WT230 RS232C connection using GateWT, please verify the following RS232C communication settings on the instrument: Mode = 488.2 Hand = 0 For = 0 Baud Rate = 9600 Terminator Cr+Lf Even though you can run ...
Selecting formulas for calculating apparent power and reactive powerThere are several types of power—active power, reactive power, and apparent power. Generally, the following equations are satisfied:Active power P = ...
To programmatically read all 500 harmonic orders measurement values, please use the ":NUMERIC:LIST" command set. The maximum number of items for the :NUMERIC:LIST:VALUE? command is 64. However, 1 LIST ITEM can ...
The Power Analyzer Accuracy and Basic Uncertainty Calculator can be used to determine the uncertainty in voltage, current, and active power (watts) measurement values for various frequency ranges and wiring systems.
If the HOLD button was pressed when the WT210 was powered OFF, it causes the WT210 to display "-----" on the next time it is powered ON. You can revert back to a numerical display simply press the HOLD button.
This comprehensive training module covers the following topics:
- Introduction & Product Familiarization
- Basic System & Wiring Configurations
- Basic Setup and Operating Features
- Step-by-Step Video Demonstrations of Features
This training module covers the following topics:
- Introduction & Installation
- Connecting to Instrument
- Setup, Measure, and Analyze
- File Operations: Saving and Loading Data
- Video Demonstrations
This comprehensive training module covers the following topics:
- Introduction & Product Familiarization
- Basic Setup, System & Wiring Configurations
- Basic and Advanced Analysis Features
As the manufacturer of the world's first drone to combine Vertical Take Off and Landing (VTOL) and forward flight, ATMOS UAV needed to perform highly accurate motor system testing, while keeping the test time as short as possible. Discover how Marlyn exceeded all expectations in terms of reliability and was successfully launched in an extremely competitive market.
Product Overviews
How-tos
Webinars
- Multi-phase power measurements
- Power measurement techniques
- Power measurement applications and examples
Updated for 2020.
DC power measurements are relatively simple, but AC power measurements with distorted waveforms, varying power factors, and multiple phases can add complexity to a simple measurement.
Watch the webinar to demystify the topic of power measurements. Additional topics include:
In this one-hour webinar, you will learn a three-step process for a complete electrical test of an AC motor & variable-speed drive system.
In this one-hour webinar you will learn about voltage and current harmonics. Specifically, you will learn how to measure and characterize this type of waveform distortion, and how it can affect your power system.