PZ4000 Power Analyzer (DISCONTINUED)

Notice: This product was discontinued on Dec 31, 2012. See this replacement product:

This powerful Power Analyzer was designed to help R&D to create a new generation of environmentally friendly products and technologies. It has been developed and produced in our ISO14001 approved facilities, in accordance with YOKOGAWA's "Guidelines for Designing Products for the Environment", and our "Criteria for Environmental Assessment in Product Design". We have adopted these Guidelines and Standards to help protect the Global Environment, consistent with the focus of the Third Conference of the Parties to the United Nations Framework Convention on Climate Change (COP3, Kyoto, December 1997).

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The PZ4000 was selected by
TM Magazine for the
Best in Test 1999.

Test & Measurement's award recognized the PZ4000 as a powerful analyzer due to these features:

  • Wide measurement bandwidth (DC, up to 2 MHz).
  • Accurate capturing of input waveforms using high-speed (maximum 5 MS/s) sampling.
  • Voltage and current waveform display and analysis functions to enable power calculations on fluctuating inputs.
  • Harmonic analysis (up to 500th order) and Fast Fourier Transform (FFT) functions to enable high-frequency power  spectrum analysis.
  • Multiple channel, synchronized measurements using multiple units and Master-Slave trigger function simplifies complex investigations.
  • Environmentally friendly design based on YOKOGAWA's Guidelines for Designing Products for the Environment and Criteria for Environmental Assessment in Product Design.
  • Sensor input module option enables evaluation of motor efficiency and total efficiency including the motor drive.

Display of Measured Waveforms

Measured voltages and currents are sampled at high speed (maximum 5 MS/s). Power is calculated from the sampled data along with accurately displayed waveforms

Display Examples:

Output signal check for an inverter-driven 3-phase motor
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Check using zoom function to determine whether pulse waveforms are fully acquired during low-rpm operation
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  • Correlate between displayed waveforms and calculated power values.
  • Waveform displays and calculated values (e.g., power values) are based on sampled data stored in internal memory, so they are correlated with each other.
  • Check measurement effectiveness easily.
  • Measured waveforms and calculated values can be checked at the same time to prevent erroneous measurements.
  • No probe needed for waveform measurements.
  • Voltage and current waveforms can be measured without using oscilloscope differential probes and current probes. The PZ4000 can make waveform measurements much more accurately than with conventional oscilloscopes.



Wide Bandwidth, HIgh-Precision Measurements

Measurements can be made over a wide frequency range (DC up to 2 MHz), making it possible to measure power loss on electronic components, high-frequency lighting equipment, and other devices. 

Display Examples:

Measurements on inverter lighting equipment with a fundamental wave of approximately 50 kHz
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Loss measurement during high-frequency capacitor driving (500 kHz)
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  • High-precision power measurements at high frequency
  • Waveform displays and calculated values (e.g., power values) are based on sampled data stored in internal memory, so they are correlated with each other.
  • Lamp current measurement in fluorescent bulbs
  • With the PZ4000, you can measure the lamp current of fluorescent bulbs using a Delta Computation function. The function computes the difference of the instantaneous values between the output current of electric ballast and a cathode current.
  • Loss measurement when actual load is applied to electronic components
  • With the PZ4000, you can measure power loss resulting from actual load applications, instead of evaluating characteristics based on small signals using an LCR meter or an impedance analyzer.
  • Power measurements on extremely low-frequency signals
  • Take full advantage of the 4 M word internal memory (optional; enough for 4 million samples) to obtain precise measurements of extremely low-frequency (several mHz) signals.


Dynamic Capturing of Load Fluctuations

Internal memory (maximum 4 M words) stores your measurements. You can calculate and display voltage, current, and power values for specific portions of the total memory (equivalent to 100 k words of data). The display makes it easy to see how the load fluctuates with time.

Display Examples:

Inrush current measurement in an inverter-type cleaner
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Efficiency evaluation when inverter output is turned on in a cooking machine using induction heating
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  • Inrush current and power measurements (at switch-on)
  • In the past, it was necessary to measure inrush current and power values at power-on using measuring instruments such as oscilloscopes. The PZ4000 performs these measurements much more accurately and greatly simplifies this procedure.
  • Power measurements in specific states (specific spans in internal memory)
  • Power measurements on equipment with fluctuating loads are normally obtained by measuring the energy in certain operating patterns over a long time period using an integration function. The average power value is then calculated. In contrast, The PZ4000 lets you make power measurements over a specific period defined by adjustable cursors. This reduces the time required for measurements.


Graphical Power Analysis

The PZ4000 lets you analyze harmonics (up to 500th order) using high-speed sampling. With the FFT calculation function, you can perform spectrum analysis in the high-frequency range (up to 2.5 MHz). Analysis results are displayed on spectrum graphs. In addition, vectors showing the fundamental components of distorted waveforms can be displayed to give a visual presentation of the load balance in a 3-phase power supply system.

Spectrum analysis of current and power in inverter output
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Fundamental wave vector display in inverter output
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  • Distorted wave power spectrum analysis
  • With the PZ4000, you don't need a frequency analyzer to perform spectrum analysis on the carrier component of an inverter. Up to now, this type of analysis has been difficult. A major advantage with the PZ4000 is that you can input signals directly without using probes. This removes any error due to probe tolerance.
  • Load balance evaluation for three-phase powered equipment
  • The vector display using the harmonic analysis function lets you visually know the condition of each phase in a 3-phase circuit equipment. This makes evaluation simpler than when calculations are performed manually based on numerical data.


Frequency characteristcs (voltage and current)Tm Pz4000 11

Frequency characteristics (phase angle and zero power factor)
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Linearity (current)
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366921 BNC to Banana-Jack (Female) Adapter 42V

BNC-Banana-jack (female) adapter. Use for circuits having voltage levels no greater than 42 V.

758921 Fork terminal adapter

Adapters for fitting a 4mm banana plug to a fork terminal. Set contains one black and one red clip. 1000 Vrms-CAT II.

758922 Small Alligator-Clip Adapter 300V

Rated at 300 V. Attaches to the 758917 test leads. Sold in pairs.

758923 Spring Hold Safety Terminal Adapter Set

Two adapters in a set (spring-hold type).

758929 Large Alligator Clip Adapter 1000V

Rated at 1000V. Attaches to the 758917 test leads. Sold in pairs.

758931 Screw-Fastened Safety Voltage Terminal Adapter Set

Screw-fastened adapters. Two adapters in a set. 1.5 mm Allen Wrench.

B9850NX Legacy DL/DLM Printer Paper

Quality paper for the DLM6000/DL9700/DL9500/DL1700(E)/DL1600/DL1500 and DL7400

751535-E4 Rack mounting kit

RACK MOUNTING KIT For an EIA-compliant Single-housing Rack

751535-J4 Rack mounting kit

RACK MOUNTING KIT For an JIS-compliant Single-housing Rack

705926 Connection Cable for DA4, DA12, Scanner Box (701953)

Applicable for DL850 and WT300 series.

701901 BNC to Safety Banana 1.8m Cable, 1:1

1000 Vrms-CAT II, 1.8 m long
Safety BNC(male) to safety banana(female) use in combination with 701959, 701954, 758921, 758922 or 758929.

758917 DMM Measurement Lead Set

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.

366924 BNC to BNC 1m Cable

BNC-BNC 1m. For connection to simultaneously measurement with 2 units, or for input external trigger signal. 

B9284LK External Sensor Cable

For connection the external input of the WT3000 to the current sensor.
Length: 50cm

 In the case of three-phase three-wire, or 3V3A wiring, the power, power factor, and phase angle of each input element do not match because it is the line to line voltage that is measured.   Please download and refer ...
The part numbers for the black current knobs and pads (studder) is listed below: A9105ZG: Black Current Knob Set of 2 B9292GX: Pad (Studder) Set of 10
The following product tutorial guides have been created for the WT and PZ Series Power Meter and Analyzer instruments and are available for download. Each tutorial contains quick and easy steps to help you get started ...
You can use the Power Viewer (Model 253734) software. However if you only need to view waveforms, we recommend you use the Waveform Viewer (Model 700919, version 1.23 or later) software. The trial version of the Power ...
The actual display update rate is shown below for observation times from 2 ms to 100 ms. 2 ms : 0.8 s 4 ms : 0.9 s 10 ms : 1.2 s 20 ms : 1.8 s 40 ms : 1.8 s 100 ms : 1.8 s Measurement Conditions Modules mounted : ...
You can use the "STATUS:ESSR?" command to access the extended event register and determine whether the data was updated. You can judge the data update status by referencing bit 1 (DAV) of this register. However to do ...
Send the appropriate command as shown below to your instrument, then read in all the data that is returned.     PZ4000: "NUMERIC:NORMAL:VALUE?"    WT1600: "NUMERIC:NORMAL:VALUE?"    WT100/200 series ...
Send the "NUMERIC:FORMAT:ASCII" command This sets the data format for the data you want to read out. Measured data read out using the "NUMERIC:NORMAL:VALUE?" command is output as an ASCII string. Send the ...
To change the voltage range on element 1 to 30 V, send the "INPUT:VOLTAGE:RANGE:ELEMENT1 30V" command to the measuring instrument.To change the current range on element 1 to the 1 A range, send the ...
The waveform may actually not be a pure sine wave. Even though a 50/60 Hz sine wave is expected, the following factors may be involved: The waveform is slightly distorted (harmonic components are mixed in) Small ...
Check the "Sync Source" and zero cross filter (frequency filter) settings. For the WT3000, "Sync Source" setting is irrelevant if the data update rate is 250 ms, 500 ms, 1 s, or 2 s. Sync Source SettingIn principle, if ...
In the three-phase three-wire, or 3V3A wiring scheme, the phase angle of voltage between each input element is 60 degrees because it is the line to line voltage that is measured. Please download and refer to the ...
The measurement intervals of the measured I/O data must overlap exactly. Check the sync source setting. For example, route the input to a three-phase device under measurement to input elements 1-3 on the power meter, ...
Check for differences in the specifications or features of the instruments. For values that do not match when inputting a 50/60 sine wave Check whether the value is within the specifications (error) of each power ...
In the three-phase three-wire, or 3V3A wiring scheme, the phase angle of voltage and current input to each input differs from that of the actual load because it is the line to line voltage that is measured.  In ...
This is due to measurement and calculation error, or differences in calculation methods.   On the WT, the three-phase apparent power (ΣS) equation is calculated under the assumption of a balanced condition (the ...
When measuring input signals of distorted waves, signals that are DC-offset or signals that include superimposed harmonic components, will result in different values for power factor and phase angle than those expected ...
This is to prevent an open current circuit. Among non-Japanese power meters, there are products that also use safety terminals for current terminals. Safety terminals can be said to be safe because the terminal is not ...
The input terminals on all Yokogawa power meteras are located on the rear panel. This takes into account safety when handling the measuring instrument.    The signal input to the power meter normally carries high ...
Check the Synch Source and Frequency Filter settings When a single-phase signal being measured fluctuates around power factor of 1.Slight fluctuations in the measured values of voltage, current, and power can cause a ...
The following may be causing the problem. 5V may have occurred during rating. Check the range setting again. DA output error can affect the values when the input is smaller than the rating. Have you checked the error ...
This could be caused by any of the following: Is there any crosstalk (especially around the 2nd order)? Are there any effects of CMRR (especially around the 2nd order)? Is the location of measurement immediately next ...
It is possible to measure the phase difference by using the function φU1(1)-U2(1) in Hamonics Measurement Mode.In this mode, if the wiring pattern is set to 1P2W, the PZ4000 will display no value (----). It is ...
The difference in measurement values can be attributed to the difference in calculation methods for normal mode and harmonic mode.   The voltage, current, and power in normal mode are displayed as the total of the ...
There are several items you will need to check and verify to solve this issue. Verify the GP-IB connectionSome instruments have a D/A output connector located next to the GP-IB connector. There have been some ...
Please refer to the attached Excel spreadsheet for complete information regarding the RS232 cable pinouts used with by the WT & PZ Series Power Analyzers.
Check for differences in the specifications or features of the instruments. For values that do not match when inputting a 50/60 sine wave Check whether the value is within the specifications (error) of each power ...

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