YOKOGAWA PZ4000 User manual

Power Analyzer
IM 253710-01E
3rd Editionrr

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PIM 103-03E

i
IM 253710-01E
Disk No. BA32
3rd Edition : May 2009(YK)
All Rights Reserved, Copyright © 1999 Yokogawa Electric Corporation
Thank you for purchasing the YOKOGAWA PZ4000 Power Analyzer.
This User’s Manual contains useful information about the precautions, functions, and
operating procedures of the instrument. To ensure correct use, please read this manual
thoroughly before operation.
Keep this manual in a safe place for quick reference in the event a question arises.
The following two manuals, including this one, are provided as manuals for the PZ4000.
Manual Name Manual No. Description
PZ4000 Power Analyzer IM 253710-01E This manual. Explains all functions and procedures
User’s Manual of the PZ4000 excluding the communication
functions.
PZ4000 Power Analyzer IM 253710-11E Explains the communication functions of the GP-IB
Communication Interface and serial interfaces.
User’s Manual
Notes
•The contents of this manual are subject to change without prior notice as a result of
continuing improvements to the instrument’s performance and functions. The figures
given in this manual may differ from the actual screen.
•Every effort has been made in the preparation of this manual to ensure the accuracy
of its contents. However, should you have any questions or find any errors, please
contact your nearest YOKOGAWA dealer.
•Copying or reproducing all or any part of the contents of this manual without
YOKOGAWA’s permission is strictly prohibited.
Trademarks
•MS-DOS is a registered trademark of Microsoft Corporation.
•PostScript is a registered trademark of Adobe Systems Incorporated.
•Other company and product names are trademarks or registered trademarks of their
respective holders.
Revisions
1st edition: April 1999
2nd edition: April 2000
3rd edition: May 2009

ii IM 253710-01E
Checking the Contents of the Package
Unpack the box and check the contents before operating the instrument. If some of the
contents are not correct or missing or if there is physical damage, contact the dealer
from which you purchased them.
PZ4000 Main Unit
Check that the model name and suffix code given on the name plate on the side panel
match those on the order.
MODEL
SUFFIX
NO.
Made in Japan
MODEL and SUFFIX codes
Model Code Suffix Code Specifications
253710 100 to 120 / 200 to 240 VAC
The input module is not included with the main unit. For
information on the input module, see page iii.
Power cord -D UL/CSA Standard Power Cord (Part No. : A1006WD)
[Maximum rated voltage : 125 V, Maximum rated current : 7 A]
-F VDE Standard Power Cord (Part No. : A1009WD)
[Maximum rated voltage : 250 V, Maximum rated current : 10 A]
-Q BS Standard Power Cord (Part No. : A1054WD)
[Maximum rated voltage : 250 V, Maximum rated current : 10 A]
-R AS Standard Power Cord (Part No. : A1024WD)
[Maximum rated voltage : 250 V, Maximum rated current : 10 A]
-H GB Standard Power Cord (complies with the CCC)(Part No.:A1064WD)
[Maximum rated voltage : 250 V, Maximum rated current : 10 A]
Options /M1 Extend memory to 1 Mword/CH*
/M3 Extend memory to 4 Mword/CH*
/B5 Built-in printer
/C7 SCSI
*Only one of the options, /M1 or /M3, can be selected.
Ex : For UL/CSA standard power cord, 4 Mword/CH memory extension, built-in printer, and
SCSI : 253710-D/M3/B5/C7
NO. (Instrument No.)
When contacting the dealer from which you purchased the instrument, please quote
the instrument No.
Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC
This product complies with the WEEE Directive (2002/96/EC) marking requirement.
The affixed product label (see below) indicates that you must not discard this electrical/
electronic product in domestic household waste.
Product Category
With reference to the equipment types in the WEEE directive Annex 1, this product is
classified as a “Monitoring and Control instrumentation” product.
Do not dispose in domestic household waste.
To return unwanted products, contact your local Yokogawa Europe B. V. office.

iii
IM 253710-01E
Standard Accessories for the PZ4000
The following standard accessories are supplied with the instrument.
Part Name Part Number Q’ty Notes
1. Power cord See previous page 1 –
2. Spare power fuse A1463EF 1 250 V, 6.3 A, time lag
(Attached to the fuse holder)
3. Printer roll paper B9850NX 1 For the built-in printer
(Only provided with option /B5.)
4. Rubber feet A9088ZM 2 Two pieces in one set. Two sets provided.
5. Cover plate B9315DC 4 Attach cover plates on unused slots using
screws (see item 7).
6. Current input B9315DJ 1 –
protective cover
7. Screw Y9305LB 20 M3, length: 5 mm (for fixing cover plates
and current input protective covers in place)
8. Clamp filtter A1179MN 1 For GP-IB cable
(Ferrite core)
9. • User’s Manual IM253710-01E 1 This manual
•Communication IM253710-11E 1 –
Interface User’s Manual
8.
3.
1. (one of the following power cords is supplied
according to the instrument's suffix codes.)
4. 5. 6. 7.
2.
DF RH
Q
9.
Checking the Contents of the Package

iv IM 253710-01E
Input Module (Sold Separately)
Check that the model name given on the name plate on the input module matches that
on the order.
Power measurement module
Model Code Suffix Code Specifications
253751 Voltage 1000 V / current 5 A / current sensor 500 mV
253752 Voltage 1000 V / current 5 A & 20 A / current sensor 500 mV
Module specification -E1 Plug-in unit
*Install the power measurement modules in order, starting with the slot for element 1.
Sensor input module*1
Model Code Suffix Code Specifications
253771*2 Motor module, 2 channel input.
Allows signals to be input from revolution sensor or torque
meter.
Module specification -E1 Plug-in unit
*1 Install the sensor input module into the element 4 slot.
*2 This is applicable to products (PZ4000) with firmware version 2.01 or later.
Ex : For a power measurement module with Voltage 1000 V / current 5 A / current sensor 500
mV : 253751-E1
MODEL
NO.
SUFFIX
Made in Japan
MODEL
NO.
SUFFIX
Made in Japan
Checking the Contents of the Package

v
IM 253710-01E
Standard Accessories for the Input Module
The following standard accessories are supplied with the input module.
Part Name Part Number Q’ty Notes
1. External sensor cable B9284LK 1 Provided with the 253751 and 253752
2. Clamp filtter (Ferrite core) A1179MN 2 For measurement cable
1. 2.
Optional Accessories (Sold Separately)
The following optional accessories are available for purchase separately.
Part Name Part Number Q’ty Notes
1. Serial port adapter 366971 1 9 pin*1-to-25 pin*2 adapter
*1 EIA-574 Standard
*2 EIA-232 Standard (RS-232)
2. BNC-alligator clip 366926 1 42 V or less, length 1 m
measurement lead
3. BNC-BNC 366924 1 42 V or less, length 1 m
measurement lead 366925 1 42 V or less, length 2 m
4. Measurement lead 758917 1 Two leads in one set, used with the separately sold
adapter 758922 or 758929, length 0.75 m, ratings
1000 Vrms
5. Alligator clip 758922 1 Two pieces in one set, for the measurement lead
adapter set 758917. Rated voltage 300 V
6. Alligator clip 758929 1 Two pieces in one set, for the measurement lead
adapter set 758917. Rated voltage 1000 V
7. Fork terminal 758921 1 Two pieces in one set, for the measurement lead
adapter set 758917. Rated current 25 A
1. 2. 3.
4. 5. 6. 7.
Spare Parts (Sold Separately)
The following spare parts are available.
Part Name Part Number Q’ty Notes
1. Printer roll paper B9850NX 5 One roll is one set, thermal-sensitive paper, total
length 30 m
2. Power fuse A1463EF 2 250 V, 6.3 A, time lag
Note
We recommend you keep the packing box. The box is useful when you need to transport the
instrument.
Checking the Contents of the Package

vi IM 253710-01E
Safety Precautions
This instrument is an IEC safety class I instrument (provided with terminal for protective
earth grounding).
The following general safety precautions must be observed during all phases of
operation. If the instrument is used in a manner not specified in this manual, the
protection provided by the instrument may be impaired. YOKOGAWA Electric
Corporation assumes no liability for the customer’s failure to comply with these
requirements.
The following symbols are used on this instrument.
“Handle with care.” To avoid injury, death of personnel or damage to the
instrument, the operator must refer to the explanation in the User’s Manual or
Service Manual.
Alternating current
Both direct and alternating current
ON (power)
OFF (power)
In-position of a bistable push control
Out-position of a bistable push control
Protective Earth Terminal. To ensure safety, if the current to be measured
exceeds 7 A (RMS), use a cable or conductor that allows current greater than the
current to be measured to flow through it, and always connect protective
grounding prior to use of this instrument. For productsshipped as of January
2004, the protective earth terminal is located on the rear panel.

vii
IM 253710-01E
Make sure to comply with the following safety precautions. Not complying might
result in injury, death of personnel.
WARNING
Power Supply
Ensure that the source voltage matches the voltage of the power supply before
turning ON the power.
Power Cord and Plug
To prevent an electric shock or fire, be sure to use the power cord supplied by
YOKOGAWA. The main power plug must be plugged into an outlet with a
protective earth terminal. Do not invalidate protection by using an extension
cord without protective grounding.
Protective Grounding
Make sure to connect the protective grounding to prevent electric shock before
turning ON the power.
Necessity of Protective Grounding
Never cut off the internal or external protective earth wire or disconnect the
wiring of the protective earth terminal. Doing so poses a potential shock hazard.
Defect of Protective Grounding and Fuse
Do not operate the instrument when the protective earth or the fuse might be
defective. Also, make sure to check them before operation.
Fuse
To prevent fire, only use a fuse that has a rating (voltage, current, and type) that
is specified by the instrument. When replacing a fuse, turn OFF the power
switch and unplug the power cord. Never short the fuse holder.
Do Not Operate in Explosive Atmosphere
Do not operate the instrument in the presence of flammable liquids or vapors. Operation
of any electrical instrument in such an environment constitutes a safety hazard.
Do Not Remove Covers
Some areas inside the instrument have high voltages. Do not remove the cover
if the power supply is connected. The cover should be removed by
YOKOGAWA’s qualified personnel only.
External Connection
Connect the protective grounding before connecting to the item under
measurement or control unit.
See below for operating environment limitations.
CAUTION
This product is a Class A (for industrial environments) product. Operation of this
product in a residential area may cause radio interference in which case the
user will be required to correct the interference.
Safety Precautions

viii IM 253710-01E
Waste Electrical and Electronic Equipment
Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC
(This directive is only valid in the EU.)
This product complies with the WEEE Directive (2002/96/EC) marking requirement. This
marking indicates that you must not discard this electrical/electronic product in domestic
household waste.
Product Category
With reference to the equipment types in the WEEE directive Annex 1, this product is
classified as a “Monitoring and Control instrumentation” product.
Do not dispose in domestic household waste. When disposing products in the EU,
contact your local Yokogawa Europe B. V. office.

ix
IM 253710-01E
How to Use this Manual
How to Use this Manual
Structure of the Manual
This User’s Manual consists of the following 16 chapters, an appendix, and an index.
Chapter 1 Functions
Describes the functions of the instrument. Operating procedures are not given in this
chapter. However, reading this chapter will help you understand the operating procedures
given in the chapters that follow.
Chapter 2 Names and Uses of Parts
Describes the names and uses of each part of the instrument.
Chapter 3 Before Starting Measurements
Describes precautions for the use of the instrument, how to install the instrument, how to
install the input module, how to connect the power supply, how to wire measurement circuits,
how to turn ON/OFF the power switch, and other preparations before starting measurements.
Chapter 4 Common Operations
Describes common operations and functions of the instrument such as how to enter
numerical values and strings, initialize settings, start/stop the measurement acquisition,
perform zero-level compensation, and the NULL function.
Chapter 5 Setting the Measurement Mode and Range
Describes how to set the voltage/current input conditions or the handling of the input signal
such as the measurement mode (select normal/harmonics), the wiring system, the
measurement range, and filter.
Chapter 6 Setting the Time Axis
Describes how to set the input conditions for the time axis such as the observation time and
record length.
Chapter 7 Setting the Trigger
Describes how to set the trigger which determines the timing of the voltage/current signals
acquisition.
Chapter 8 Numerical Display
Describes how to display measurement function data (numerical data).
Chapter 9 Waveform Display
Describes how to display the waveforms of the voltage and current signals.
Chapter 10 Numerical Computations
Describes how to set numerical computations such as the delta computation, user definitions,
and averaging.
Chapter 11 Waveform Analysis
Describes how to set waveform computations such as FFTs and cursor measurements.
Chapter 12 Saving and Loading the Data
Describes how to save and load numerical and waveform data from the instrument.
Chapter 13 Outputting Screen Image Data
Describes how to output the screen image data.
Chapter 14 External Trigger Output and Other Operations
Describes how to set the external trigger output function, message language, and display color.
Chapter 15 Motor Evaluation Function (Applicable to Motor Modules)
Describes how to set the instrument in order to determine various motor characteristics by
inputting signals from revolution sensor and torque meter.
Chapter 16 Troubleshooting, Maintenance, and Inspection
Describes the possible causes of problems and their appropriate corrective measures.
Describes the messages that are displayed on the screen. Describes maintenance and
inspection issues such as how to perform self-tests and replace power fuses.
Chapter 17 Specifications
Describes the specifications of the main unit and of the input module in tables.
Appendix
Describes the relationship between the observation time, sampling rate, and record length,
how to determine the measurement function and delta computation, and the ASCII header file
format. Gives a list of initial settings.
Index
Alphabetic and Symbol index of contents.

xIM 253710-01E
Contents
Checking the Contents of the Package.................................................................................................ii
Safety Precautions ...............................................................................................................................vi
Waste Electrical and Electronic Equipment .......................................................................................viii
How to Use this Manual .......................................................................................................................ix
Chapter 1 Functions
1.1 System Configuration and Block Diagram ....................................................................... 1-1
System Configuration ....................................................................................................... 1-1
Block diagram .................................................................................................................. 1-2
Signal Flow and Process ................................................................................................. 1-3
1.2 Measurement Modes and Measurement/Computation Periods ....................................... 1-5
Normal Measurement Mode and Measurement Function (Types of Numerical Data) ..... 1-5
Harmonic Measurement Mode and Measurement Function (Types of Numerical Data) ..... 1-7
Measurement/Computation Period ................................................................................ 1-10
Wiring Method ................................................................................................................ 1-11
Number of Displayed Digits ........................................................................................... 1-11
1.3 Acquiring Data (Voltage and Current Signals) ............................................................... 1-12
Sampled Data, Input module, Element and Channel ..................................................... 1-12
Measurement Range of Voltage, Current, and Power, Scaling...................................... 1-13
Input Filter (Line Filter and Zero Crossing Filter) ........................................................... 1-14
Observation Time, Record length .................................................................................. 1-15
Dividing the record length, Time Base ........................................................................... 1-16
Zero Level Compensation, NULL Function .................................................................... 1-17
1.4 Trigger ............................................................................................................................ 1-18
Trigger Source, Trigger Slope, Trigger Level, Trigger Type ........................................... 1-18
Trigger Mode .................................................................................................................. 1-19
Trigger Position, Trigger Delay....................................................................................... 1-21
1.5 Numerical Display .......................................................................................................... 1-22
Numerical display during the normal measurement mode............................................. 1-22
Numerical display during the harmonic measurement mode ......................................... 1-23
Resetting the Numerical Display .................................................................................... 1-25
1.6 Waveform Display .......................................................................................................... 1-26
Vertical (Amplitude) Axis and Horizontal (Time) Axis ..................................................... 1-26
Turning ON/OFF the Waveform Display, Vertical Position of the Waveform , Split Screen of
the Waveform, Display Interpolation of the Waveform ................................................... 1-28
Zooming on the Waveform ............................................................................................. 1-29
Vector Display of Harmonics .......................................................................................... 1-31
Bar Graph Display of the Harmonic Data, X-Y Waveform Display ................................. 1-32
Other Display Settings ................................................................................................... 1-33
1.7 Numerical Computation ................................................................................................. 1-34
Delta Computation, User-defined Functions, Equation for the Apparent Power ............ 1-34
Averaging, Phase Difference ......................................................................................... 1-35
Equation for the Distortion Factor, Corrected Power, Re-computing the numerical data1-36
1.8 Waveform Analysis......................................................................................................... 1-37
Waveform Computation ................................................................................................. 1-37
Display Scaling of a Computed Waveform..................................................................... 1-39
FFT ................................................................................................................................ 1-40
Re-computing the Waveform, Cursor measurements .................................................... 1-41

xi
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3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
App
Index
1.9 Saving/Loading the Data and Other Useful Functions ................................................... 1-42
Saving/Loading data from a Floppy Disk, Saving/Loading from a SCSI Device,
Initialization, Outputting Screen Image Data.................................................................. 1-42
Selecting the Message Language, Setting the Brightness of the LCD monitor,
Setting the Display Colors, Action-on-Trigger, Self-test Function,
Confirming the System Condition of the Instrument, Communication Function (GP-IB/Serial) .... 1-43
Chapter 2 Names and Uses of Parts
2.1 Front Panel, Rear Panel, and Top View ........................................................................... 2-1
2.2 Operation Keys, Jog Shuttle, and Rotary Knob ............................................................... 2-3
2.3 Screens ............................................................................................................................ 2-6
2.4 Input Modules ................................................................................................................2-14
Chapter 3 Before Starting Measurements
3.1 Precautions on the Use of the instrument ........................................................................ 3-1
3.2 Installing the Instrument ................................................................................................... 3-2
3.3 Installing the Input Module ............................................................................................... 3-4
3.4 Wiring Precautions ...........................................................................................................3-6
3.5 For Making Accurate Measurements ............................................................................... 3-8
3.6 Connecting the Power Supply ........................................................................................ 3-10
3.7 Directly Wiring the Circuit under Measurement ............................................................. 3-11
(Wiring to the voltage/current input terminal of the power measurement module.)
3.8 Using an External Current Sensor to Wire the Circuit under Measurement .................. 3-15
(Wiring to the current sensor input connector of the power measurement module.)
3.9 Using an External PT or CT to Wire the Circuit under Measurement ............................ 3-19
(Wiring to the voltage/current input terminal of the power measurement module.)
3.10 Wiring a Circuit with Voltage Input Exceeding 600 V ..................................................... 3-22
3.11 Turning ON/OFF the Power Switch................................................................................ 3-23
3.12 Setting the Date and Time ............................................................................................. 3-25
Chapter 4 Common Operations
4.1 Entering Values and Strings ............................................................................................. 4-1
4.2 Initializing the Settings ..................................................................................................... 4-3
4.3 Starting/Stopping Data Acquisition................................................................................... 4-4
4.4 Performing Zero-level Compensation .............................................................................. 4-6
4.5 Using the NULL Function ................................................................................................. 4-7
4.6 Using the Help Function ................................................................................................... 4-8
Chapter 5 Setting the Measurement Mode and Range
5.1 Selecting the Measurement Mode ................................................................................... 5-1
5.2 Selecting the Wiring Method ............................................................................................ 5-2
5.3 Setting the Measurement Range during Direct Input ....................................................... 5-6
5.4 Setting the Measurement Range when Using an External Current Sensor ................... 5-14
5.5 Setting the Scaling Function when using an External PT or CT .................................... 5-20
5.6 Selecting the Input Filter ................................................................................................ 5-25
Contents

xii IM 253710-01E
Chapter 6 Setting the Time Axis
6.1 Setting the Observation Time ........................................................................................... 6-1
6.2 Selecting the Record Length for Acquiring Data .............................................................. 6-3
6.3 Selecting the Time Base .................................................................................................. 6-5
The following section applies when the measurement mode is set to harmonic
measurement.
6.4 Selecting the PLL Source for Harmonic Measurement .................................................... 6-7
Chapter 7 Setting the Trigger
7.1 Selecting the Trigger Mode .............................................................................................. 7-1
7.2 Selecting the Trigger Source............................................................................................ 7-3
7.3 Setting the Edge Trigger .................................................................................................. 7-6
7.4 Setting the Window Trigger .............................................................................................. 7-8
7.5 Setting the Trigger Position ............................................................................................ 7-11
7.6 Setting the Trigger Delay ............................................................................................... 7-13
Chapter 8 Numerical Display
8.1 Selecting the Number of Displayed Digits ........................................................................ 8-1
8.2 Displaying Normal Measurement Data ............................................................................ 8-2
8.3 Changing the Displayed Items of the Normal Measurement Data ................................... 8-8
The following section applies when the measurement mode is set to harmonic
measurement.
8.4 Displaying Harmonic Measurement Data ...................................................................... 8-11
8.5 Changing the Displayed Items of the Harmonic Measurement Data ............................. 8-19
Chapter 9 Waveform Display
9.1 Selecting the Channel to Display ..................................................................................... 9-1
9.2 Moving the Vertical Position ............................................................................................. 9-5
9.3 Splitting the Screen and Displaying the Waveforms ........................................................ 9-7
9.4 Interpolating the Display ................................................................................................ 9-10
9.5 Changing the Graticule .................................................................................................. 9-12
9.6 Turning ON/OFF the scale display ................................................................................. 9-14
9.7 Setting a Label Name for the Waveform ........................................................................ 9-16
9.8 Zooming on the Waveform ............................................................................................. 9-18
The following section applies when the measurement mode is set to harmonic
measurement.
9.9 Displaying the Vectors of the Harmonics ....................................................................... 9-24
9.10 Displaying the Bar Graph of Harmonic Data .................................................................. 9-27
9.11 Displaying the X-Y Waveform ........................................................................................ 9-32
Contents

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3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
App
Index
Chapter 10 Numerical Computations
10.1 Setting the Measurement/Computation Period, Re-computing...................................... 10-1
10.2 Selecting the Delta Computation ................................................................................... 10-8
10.3 Setting the User-Defined Function ............................................................................... 10-11
10.4 Setting the Equations for Apparent Power and Corrected Power ................................ 10-15
10.5 Averaging ..................................................................................................................... 10-18
10.6 Selecting the Display Format of the Phase Difference ................................................ 10-20
The following section applies when the measurement mode is set to harmonic
measurement.
10.7 Setting the Harmonic Orders under Analysis ............................................................... 10-22
10.8 Selecting the Equation for the Distortion Factor .......................................................... 10-24
Chapter 11 Waveform Analysis
11.1 Setting the Computation Region, Re-computing............................................................ 11-1
11.2 Setting the Equation, Converting the Scale of the Computed Waveform ...................... 11-4
11.3 Performing the FFT ........................................................................................................ 11-8
11.4 Measuring with the Cursor ........................................................................................... 11-10
Chapter 12 Saving and Loading the Data
12.1 Precautions on the Use of the Floppy Drive .................................................................. 12-1
12.2 Connecting SCSI Devices.............................................................................................. 12-2
12.3 Changing the SCSI ID Number ...................................................................................... 12-3
12.4 Formatting the Disk ........................................................................................................ 12-5
12.5 Saving and Loading Setup Parameters ....................................................................... 12-10
12.6 Saving and Loading Waveform Data ........................................................................... 12-16
12.7 Saving Numerical Data ................................................................................................ 12-22
12.8 Changing the File Attribute, Deleting Files ................................................................... 12-28
12.9 Copying Files ...............................................................................................................12-33
12.10 Changing the Directory/File Name, Creating a Directory ............................................. 12-37
Chapter 13 Outputting Screen Image Data
13.1 Installing the Paper Roll into the Built-in Printer (Option), Paper Feeding ..................... 13-1
13.2 Printing to the Built-in Printer (Option) ........................................................................... 13-5
13.3 Printing to an External Centronics Printer ...................................................................... 13-8
13.4 Saving Screen Images to Floppy Disk and SCSI Device............................................. 13-11
Chapter 14 External Trigger Output and Other Operations
14.1 External Trigger Output .................................................................................................. 14-1
14.2 Selecting the Message Language/Setting the Brightness of the Screen ....................... 14-2
14.3 Setting the Display Colors of the Screen ....................................................................... 14-4
14.4 Setting the Action-on-Trigger ......................................................................................... 14-8
Contents

xiv IM 253710-01E
Contents
Chapter 15 Motor Evaluation Function (Applicable to Motor Modules)
15.1 Inputting Signals of rotating speed and Torque.............................................................. 15-1
15.2 Setting the Input Range of Revolution Sensor and Torque Meter Signals ..................... 15-3
15.3 Selecting the Input Filter ................................................................................................ 15-9
15.4 Setting the Scaling Factor, the Pulse Count, and Unit Used to Measure the rotating speed ... 15-11
15.5 Setting the Scaling Factor and Unit Used to Measure the Torque ............................... 15-14
15.6
Setting the Motor’s Number of Poles Used to Compute the Synchronous Speed and the Slip ... 15-16
15.7 Setting the Scaling Factor and Unit Used to Compute the Motor Output .................... 15-18
15.8 Computing the Motor Efficiency and Total Efficiency ................................................... 15-20
Chapter 16 Troubleshooting, Maintenance, and Inspection
16.1 Troubleshooting ............................................................................................................. 16-1
16.2 Error Messages and Corrective Actions......................................................................... 16-2
16.3 Performing a Self-test .................................................................................................... 16-5
16.4 Checking the System Conditions ................................................................................... 16-8
16.5 Replacing the Power Fuse ............................................................................................. 16-9
16.6 Recommended Replacement Parts ............................................................................. 16-10
Chapter 17 Specifications
17.1 Input ............................................................................................................................... 17-1
17.2 Display ........................................................................................................................... 17-1
17.3 Time Axis........................................................................................................................ 17-1
17.4 Measurement Function (Measurement Item) ................................................................. 17-2
17.5 Functions ....................................................................................................................... 17-6
Measurement Mode and Wiring Method, Data Acquisition, Frequency Measurement .. 17-6
Trigger, Numerical Display, Waveform Display .............................................................. 17-7
Vector/Bar Graph Displays, Simultaneous display, Numerical computation, Waveform Analysis .. 17-8
Harmonic Measurement, Save and Load data, Output Screen Image Data.................. 17-9
17.6 External Trigger I/O Section ......................................................................................... 17-10
17.7 Internal Floppy Disk Drive ............................................................................................ 17-10
17.8 GP-IB Interface ............................................................................................................ 17-10
17.9 Serial (RS-232) Interface ............................................................................................. 17-11
17.10 Centronics Interface ..................................................................................................... 17-11
17.11 SCSI (Option) ............................................................................................................... 17-11
17.12 Built-in Printer (Option) ................................................................................................ 17-11
17.13 General Specifications ................................................................................................. 17-12
17.14 External Dimensions (253710) ..................................................................................... 17-14
17.15 Power Measurement Module (253751)........................................................................ 17-15
17.16 Power Measurement Module (253752)........................................................................ 17-20
17.17 Motor Module (253771) ................................................................................................ 17-25
Appendix
App 1 Relationship between the Observation Time, Sampling Rate, and Record length ......App-1
App 2 Symbols and Determination of Measurement Functions ............................................. App-4
App 3 Determination of Delta Computation ............................................................................ App-8
App 4 List of Initial Settings and Display Order of Numerical Data ......................................App-10
App 5 ASCII Header File Format..........................................................................................App-16
App 6 Float File Format ........................................................................................................ App-20
App 7 Power Basics (Power/Harmonics/Three Constants Related to the AC Circuit) .........App-25
Index

1-1
IM 253710-01E
Functions
1
Chapter 1 Functions
1.1 System Configuration and Block Diagram
System Configuration
SCSI (option)
Built-in printer (option)
PC
Numerical data
Screen image data
Printer
Floppy disk
External
SCSI
device
Centronics printer
Centronics
interface
CT
Current
Sensor
Power
measurement
module
Current
(Input one type of signal)
PT
Voltage
(Input one type of signal)
Screen image data
Complies with EIA-574 Standard (EIA-232 (RS-232) Standard for 9 pin)
PC
External trigger output
External trigger input
External clock input
PZ4000
Waveform data
Setup parameters
Numerical data
Waveform data
Setup parameters
Numerical data
Screen image data
Waveform data
Setup parameters
Numerical data
Screen image data
Waveform data
Setup parameters
GP-IB interface,
Serial interface
Motor module
Torque
meter
Revolution
sensor
Item under measurement

1-2 IM 253710-01E
Block diagram
Power measurement module Model : 253751 / 253752
Current
Sensor
Current input circuit
100 mΩ
Divider
12-bit
A/D Photo
Isolator
I data
I
LPF
1 MHz
LPF
20 kHz
LPF
500 Hz
Divider
Divider
10 mΩ
5 A
20 A
±
±
I
I
U
Voltage input circuit OP
AMP
OP
AMP
12-bit
A/D Photo
Isolator
U data
U
LPF
1 MHz
LPF
20 kHz
LPF
500 Hz
Resistor
Resistor
1 MΩ
±
Zero
Crossing
Detector
Zero
Crossing
Detector
Applies only to
253752
Zero Crossing
Data
Zero Crossing
Data
Motor module Model: 253771
OP
AMP
12-bit
A/D Photo
Isolator
Speed data
Torque data
LPF
100 Hz
LPF
500 Hz
Resistor
Resistor
1 MΩ
Zero
Crossing
Detector
Zero
Crossing
Detector
Zero Crossing
Data
Zero Crossing
Data
Counter
Pulse
Analog
Speed
OP
AMP
12-bit
A/D Photo
Isolator
LPF
100 Hz
LPF
500 Hz
Resistor
Resistor
1 MΩ
Torque
1.1 System Configuration and Block Diagram

1-3
IM 253710-01E
Functions
1
PZ4000 main unit Model : 253710
Element
1
Element
2
Element
3
Element
4
A/D data
Acquisition
Acquisition
Control
Logic
TRG OUT
TRG IN
EXT CLK
EXT TRG OUT
EXT TRG IN
EXT CLK IN
Optional Memory
1 MW-4 MW/CH
Standard
DSP
CPU
4 MB
Main memory
Display
ASIC
Internal
Printer
(option)
6.4 Color
LCD
Display
RAM
FDD
SCSI(option)
GP-IB
Serial(RS-232)
Centronics
ACQ-memory
100 kW/CH
Optional Memory
1 MW-4 MW/CH
Standard
ACQ-memory
100 kW/CH
Processing
Data
Acquisition
Processing
Data
ZCD data
U1
I1
U1
I1
A/D data
ZCD data
U2
I2
U2
I2
A/D data
ZCD data
U3
I3
U3
I3
A/D data
ZCD data
U4
I4
U4
I4
SRAM
Signal Flow and Process
Power measurement module Model : 253751 / 253752
A voltage signal that is applied to the voltage input terminal (U, ±) of the power
measurement module is normalized using the voltage divider of the input circuit and
an operational amplifier (OP AMP). It is then input to the A/D converter and the zero
crossing detector.
There are two ways in which current signals can be input to the 253751. One way
utilizes a current sensor input connector (Current Sensor) that inputs voltage signals
from an external current sensor. The other way utilizes a current input terminal (I, ±)
which is used to directly input the current signal. (There are three systems on the
253752, two current input terminals and one current sensor.) For current sensor
input, the input voltage is normalized using the voltage divider and OP amp. For the
direct input, the signal applied to the current input terminal is converted to voltage
using a current divider and then is normalized in the same manner as the current
sensor input. The normalized voltage is then input to an A/D converter and zero
crossing detector of the same type and configuration as those to which voltage
signals are sent.
The A/D converter samples the voltage/current input signals using the sampling clock
provided by the internal circuit of the 253710, converting the signals to digital data.
The sampling rate is fixed to 5 MS/s for the normal measurement mode, and integer
multiples of the PLL source*for the harmonic measurement mode (approx. 80 k to
160 kS/s). The sampling operation can also be carried out using a clock signal that is
applied to the external clock input connector.
*When measuring harmonics, the fundamental frequency must be determined in order to
analyze the higher orders. The PLL (phase locked loop) source is the signal that is used
to determine the fundamental frequency.
1.1 System Configuration and Block Diagram

1-4 IM 253710-01E
Motor module Model: 253771
The signal applied to the revolution sensor signal input connector (CH7) and the
torque meter signal input connector (CH8) of the motor module is normalized using
the voltage divider and the operational amplifier (OP AMP). The voltage is then input
to the A/D converter and the zero crossing detector.
•When the signal from the revolution sensor and torque meter is a DC voltage
(analog input)
The A/D converter samples the voltage/current input signals using the sampling
clock provided by the internal circuit of the 253710, converting the signals to digital
data. The sampling rate is fixed to 5 MS/s for the normal measurement mode, and
integer multiples of the PLL source for the harmonic measurement mode (approx.
80 k to 160 kS/s). The sampling operation can also be carried out using a clock
signal that is applied to the external clock input connector.
•When the signal from the revolution sensor is a pulse signal
A count value is output in place of digital data of the A/D converter. The counter
counts the signal that is output by the zero crossing detector from the rising edge to
the falling edge (one period) using the reference clock (internal clock) and updates
the count value.
PZ4000 main unit Model : 253710
The output from the A/D converter and the zero crossing detector of the module is
passed to the main unit of the 253751 via the photo isolator. Up to eight channels of
sampled data and zero crossing data are recorded into the acquisition memory (ACQ
memory) along with the external trigger and external clock conditions according to the
sampling rate that is automatically determined by the specified observation time (see
page 1-15).
The digital signal processor (DSP) determines the voltage, current, and active power
(also reactive power for harmonic measurement mode) from the sampled data in the
acquisition memory. The display ASIC processes the numerical and waveform data
so that they can be displayed.
In order to accurately determine the basic measurement items for currents (voltage,
current, active power (also reactive power for harmonic measurement mode)), the
sampled data must be averaged over a period in sync with the period of the input
signal. To do so, the DSP uses the zero crossing data and external clock and
external trigger conditions.
In addition, the DSP calculates additional items from the basic measurement items.
Among these additional items are the apparent power, the reactive power (for normal
measurement mode), the power factor, phase difference, impedance, and Σ.
1.1 System Configuration and Block Diagram