Hioki PW3336-01 User manual

XXXX･XXXX XXXXXXXXXX Instruction Manual
*600409433*
EN
Instruction Manual
POWER METER
Apr. 2016 Revised edition 3
PW3336A981-03 16-04H
PW3337
PW3336
PW3337-01
PW3337-02
PW3337-03
PW3336-01
PW3336-02
PW3336-03

Contents
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Contents
Introduction.....................................................1
Confirming Package Contents........................2
Safety Information..........................................3
Operating Precautions....................................5
Chapter 1 Overview 11
1.1 Product Overview ...............................11
1.2 Features .............................................11
1.3 Names and Functions of Parts ...........13
1.4 Measurement Workflow .....................22
Chapter 2 Measurement
Preparations 27
2.1 Installation and Connection Procedures
............................................................27
2.2 Connecting the Measurement Lines ..28
2.3 Connecting the Power Cord ...............34
2.4 Turning On the Instrument .................35
2.5 Performing Zero-adjustment ..............36
2.6 Activating Power to the Measurement
Lines ..................................................37
2.7 Turning Off the Instrument .................37
Chapter 3 Configuration and
Measurement 39
3.1 Pre-Measurement Inspection .............39
3.2 Configuring Settings ...........................40
3.2.1 Selecting the Wiring Mode .................40
3.2.2 Selecting the Current Input Method ...42
3.2.3 Selecting Display Content ..................44
Selecting display parameters ....................44
Selecting display channels .......................46
Selecting the rectifier ................................47
3.2.4 Selecting the Voltage and Current
Ranges ...............................................48
Selecting the desired range ......................48
Automatically setting the range
(auto-range operation) ............................ 49
3.2.5 Setting the Synchronization Source
(SYNC) ...............................................51
3.2.6 Setting the Frequency Measurement
Range .................................................53
3.2.7 Setting the Timeout ............................55
3.2.8 Displaying Measured Values as an
Average (AVG: Averaging) .................57
3.2.9 Setting the VT and CT Ratio ..............59
Setting the VT ratio .................................. 60
Setting the CT ratio .................................. 61
3.3 Integration ..........................................62
Starting integration ................................... 64
Stopping integration ................................. 64
Starting integration while adding to previous
integrated values (additional integration) . 65
Canceling integration
(resetting integrated values) ................... 65
Performing integration after setting an
integration time (timer integration) .......... 66
Integration precautions ............................ 68
3.3.1 Integrated Value Display Format ........70
3.4 Viewing Harmonic Measured Values .71
3.4.1 Setting the Synchronization Source ...71
3.4.2 Method for Displaying Harmonic
Measurement Parameters ..................71
3.4.3 Setting the Analysis Order Upper Limit
............................................................76
3.4.4 About the HRM ERROR lamp ............77
3.5 Measuring Efficiency ..........................78
Examples of efficiency measurement ...... 79
3.6 Performing Synchronized Measurement
with Multiple Instruments (Multiple-
instrument Synchronized Measurement)
...........................................................81
Connecting 2 instruments (PW3336/PW3337)
with a synchronization cable ................... 82
Configuring synchronized measurement . 83
EXT SYNC terminal internal circuitry ....... 84
3.7 External Control ..................................85
3.7.1 External control terminal .....................85
Connecting wires to the external control
terminals ................................................. 87
3.8 Using D/A Output ................................................88
Connecting wires to D/A output terminals 90
3.8.1 Analog Level Output, Waveform Output,
and High-speed Active Power Level
Output .................................................91
PW3336A981-03

Contents
ii
Switching between analog output and
waveform output ...................................... 92
Setting the rectifier for analog output ....... 93
3.8.2 D/A Output ..........................................95
Setting D/A output parameters ................. 95
Example uses .......................................... 97
Examples of analog output ...................... 98
Example waveform output ..................... 101
3.9 Using a Current Sensor ....................102
Before connecting a current sensor ....... 103
Connecting a Type 1 current sensor ...... 104
Connecting a Type 2 current sensor ...... 104
Setting external current sensor input ..... 106
Using an external CT ............................. 107
3.10 Other Functions ................................108
3.10.1Fixing Display Values (Display Hold) 108
Activating display hold ........................... 108
Canceling the display hold state ............ 108
3.10.2Displaying Peak, Minimum, and Maxi-
mum Values (Maximum Value Hold) 109
Displaying maximum values .................. 109
Displaying minimum values ................... 109
Returning to the instantaneous value display
............................................................... 109
Clearing maximum and minimum values 109
3.10.3Disabling Control Keys (Key Lock) ..111
Enabling the key lock state .................... 111
Canceling the key lock state .................. 111
3.10.4Initializing the Instrument
(System Reset) .................................112
3.11 When PEAK OVER, o.r, or the Unit
Indicator Flashes ..............................114
3.11.1If the PEAK OVER U or PEAK OVER I
Lamp Lights Up ................................114
3.11.2When o.r (over-range) Is Displayed .115
3.11.3When the Unit Indicator Flashes .....116
Chapter 4 Connection to a PC
117
4.1 RS-232C Settings and Connection
(Before Using Command
Communications) .............................118
Setting the RS-232C communications speed
................................................................ 119
Connecting the RS-232C Cable ............. 120
4.2 LAN Settings and Connection
(Before Using Command
Communications) .............................122
Setting the LAN’s IP address ................. 123
Setting the LAN’s subnet mask .............. 124
Setting the LAN’s default gateway .........125
Displaying the LAN’s MAC address ....... 126
Connecting the instrument to a computer
with a LAN cable ....................................127
4.3 Operating the Instrument from a
PC's Browser ................................... 129
Operating the instrument remotely .........130
4.4 GP-IB Interface Settings and Connection
(Before Using Command
Communications) .............................................131
Connecting the cable to the GP-IB connector
................................................................................................... 132
Setting the GP-IB address ............................... 133
4.5 Canceling the Remote State
(Activating the Local State) .............. 134
Canceling the remote state ....................134
Chapter 5 Specifications 135
5.1 Environmental and Safety Specifications
.......................................................... 135
5.2 General Specifications .....................136
5.3 Measurement specifications ............139
5.4 Functional Specifications .................156
5.5 Calculation Formulas Specifications 161
Voltage channel and sum value calculation
formula ................................................... 161
Current channel and sum value calculation
formulas .................................................163
Power channel and sum value calculation
formulas .................................................164
Power channel and sum value calculation
formulas .................................................167
5.6 Wiring Specifications ....................... 168
Wiring diagrams for direct input
(connections to instrument’s terminal block)
................................................................ 168
Chapter 6 Maintenance and
Service 177
6.1 Trouble Shooting ............................. 177
6.2 Error Indication ................................ 179

Contents
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Appendix A1
Appendix 1Detailed Specifications of
Measurement Items
(Display Items) ................................A1
Appendix 2Detailed Specifications
of Output..........................................A5
Appendix 2.1Detailed Specifications of Level
Output .............................................A5
Appendix 2.2Detailed Specifications of
Waveform Output ...........................A6
Appendix 2.3Detailed Specifications of
Selectable Items for D/A Output .....A7
Appendix 3Rack Mounting.........................A11
Appendix 4Dimensional Diagram...............A13
Index Index1

Contents
iv

Introduction
1
Thank you for purchasing the Hioki Model PW3336, PW3336-01, PW3336-02, PW3336-03, PW3337,
PW3337-01, PW3337-02, PW3337-03 Power Meter. To obtain maximum performance from the instrument
software, please read this manual first, and keep it handy for future reference.
The following documents are provided with this instrument. Refer to them as appropriate for your application.
The models are classified according to the number of the input channels and the factory-installed options as
follows.
The instrument can measure relatively high current with the use of HIOKI Clamp on Sensors (clamp sensors),
which are option, or current sensors. Hereafter, those sensors are collectively referred to as "current sen-
sors". Please read the instruction manuals of each sensor for details before using.
The current sensors are classified as either "TYPE1" or "TYPE2" according to the output specifications.
Using a TYPE2 current sensor requires Model 9555-10 Sensor Unit, which is option. Please refer to the
instruction manual of Model 9555-10 for details.
Introduction
1Measurement
Guide Offers an introduction to the instrument's basic measuring method for first time users.
2Instruction Manual
(This document) Contains explanation and instructions regarding the instrument's operating method and
functions.
Show the model that is equipped with each function as the icon.
: Installed −: Not installed
Model Number of input channels Factory-installed options
GP-IB D/A output
2−−
2−
2−
2
3−−
3−
3−
3

Confirming Package Contents
2
When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping. In
particular, check the accessories, panel switches, and connectors. If damage is evident, or if it fails to operate
according to the specifications, contact your dealer or Hioki representative.
Confirm that these contents are provided.
Options
Communications and control options
Model 9637 RS-232C Cable (1.8 m, 9pin-9pin, crossover cable)
Model 9638 RS-232C Cable (1.8 m, 25pin-9pin, crossover cable)
Model 9642 LAN Cable (5 m, Supplied with Cross-Over Adapter)
Model 9151-02 GP-IB Connector Cable (2 m)
Model 9165 Connection Cord (1.5 m, metal BNC to metal BNC, not CE marked, for the synchronized
measurements)
Current sensor options
Model 9661 Clamp on Sensor (500 A AC)
Model 9669 Clamp on Sensor (1000 A AC)
Model 9660 Clamp on Sensor (100 A AC)
Model CT9667 Flexible Clamp on Sensor (500 A/5000 A AC)
Model CT6862 AC/DC Current Sensor (50 A AC/DC)
Model CT6863 AC/DC Current Sensor (200 A AC/DC)
Model 9709 AC/DC Current Sensor (500 A AC/DC)
Model CT6865 AC/DC Current Sensor (1000 A AC/DC)
Model 9277 Universal Clamp on CT (20 A AC/DC)
Model 9278 Universal Clamp on CT (200 A AC/DC)
Model 9279 Universal Clamp on CT (500 A AC/DC)
Model 9272-10 Clamp on Sensor (20 A/200 A AC/DC)
Model 9555-10 Sensor Unit
Model L9217 Connection Cord
Confirming Package Contents
PW3336, PW3336-01, PW3336-02, PW3336-03,
PW3337, PW3337-01, PW3337-02, PW3337-03
Power Meter
Instruction manual
Measurement guide
Power cord
Voltage and current input terminal safety cover
PW3336, -01, -02, -03.....................4
PW3337, -01, -02, -03.....................6
Safety cover installation screws (M3 ×6 mm)
PW3336, -01, -02, -03.....................8
PW3337, -01, -02, -03.....................12
e.g.) PW3337

Safety Information
3
This manual contains information and warnings essential for safe operation of the instrument and for main-
taining it in safe operating condition. Before using it, be sure to carefully read the following safety precautions.
Safety Symbols
The following symbols in this manual indicate the relative importance of cautions and warnings.
Symbols for Various Standards
Safety Information
This instrument is designed to comply with IEC 61010 Safety Standards, and has been
thoroughly tested for safety prior to shipment. However, mishandling during use
could result in injury or death, as well as damage to the instrument .
Using the instrument in a way not described in this manual may negate the provided
safety features.
• Be certain that you understand the instructions and precautions in the manual
before use. We disclaim any responsibility for accidents or injuries not resulting
directly from instrument defects.
• Mishandling during use could result in injury or death, as well as damage to the
instrument. Be certain that you understand the instructions and precautions in the
manual before use.
With regard to the electricity supply, there are risks of electric shock, heat generation,
fire, and arc discharge due to short circuits. If persons unfamiliar with electricity mea-
suring instruments are to use the instrument, another person familiar with such
instruments must supervise operations.
In the manual, the symbol indicates particularly important information that the user should read before
using the instrument.
The symbol printed on the instrument indicates that the user should refer to a corresponding topic in the
manual (marked with the symbol) before using the relevant function.
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
Indicates a grounding terminal.
Indicates AC (Alternating Current).
Indicates that incorrect operation presents an extreme hazard that could result in serious injury or
death to the user.
Indicates that incorrect operation presents a significant hazard that could result in serious injury or
death to the user.
Indicates that incorrect operation presents a possibility of injury to the user or damage to the instrument.
WEEE marking:
This symbol indicates that the electrical and electronic appliance is put on the EU market after August 13,
2005, and producers of the Member States are required to display it on the appliance under Article 11.2 of
Directive 2002/96/EC (WEEE).
This symbol indicates that the product conforms to regulations set out by the EC Directive.

Safety Information
4
Notation
Accuracy
We define measurement tolerances in terms of f.s. (full scale), rdg. (reading) and dgt. (digit) values, with the
following meanings:
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various elec-
trical environments, categorized as CAT II to CAT IV, and called measurement categories.
This instrument conforms to the safety requirements for CAT II 1000 V, CAT III 600 V measuring instruments.
Indicates the prohibited action.
(p. ) Indicates the location of reference information.
* Indicates that descriptive information is provided below.
SET
(Bold character) Names of settings, buttons, and other screen elements are enclosed in brackets.
The screen of this instrument displays characters in the following manner.
f.s. (range) This is usually the name of the currently selected range.
rdg. (reading or displayed value) The value currently being measured and indicated on the measuring instrument.
dgt. (resolution) The smallest displayable unit on a digital measuring instrument, i.e., the input val-
ue that causes the digital display to show a "1" as the least-significant digit.
• Using a measuring instrument in an environment designated with a higher-numbered
category than that for which the instrument is rated could result in a severe accident,
and must be carefully avoided.
• Using a measuring instrument without categories in an environment designated with
the CAT II to CAT IV category could result in a severe accident, and must be carefully
avoided.
CAT II When directly measuring the electrical outlet receptacles of the primary electrical circuits in equipment con-
nected to an AC electrical outlet by a power cord (portable tools, household appliances, etc.)
CAT III When measuring the primary electrical circuits of heavy equipment (fixed installations) connected directly to
the distribution panel, and feeders from the distribution panel to outlets.
CAT IV When measuring the circuit from the service drop to the service entrance, and to the power meter and primary
overcurrent protection device (distribution panel).

Operating Precautions
5
Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions.
• Before using the instrument for the first time, verify that it operates normally to ensure that no damage
occurred during storage or shipping. If you find any damage, contact your dealeror Hioki representative.
• Before using the instrument, make sure that the insulation on the connection cable is undamaged and that
no bare conductors are improperly exposed. Using the instrument in such conditions could cause an elec-
tric shock, so contact your dealer or Hioki representative for replacements.
Operating temperature and humidity: 0°C to 40°C (32°F to 104°F) at 80% RH or less (non-condensating)
Temperature and humidity range for guaranteed accuracy: 23°C±5°C (73°F±9°F), 80%RH or less
To prevent overheating, be sure to leave the specified clearances around the unit.
Operating Precautions
Before Use
Instrument Installation
Avoid the following locations that could cause an accident or damage to the instrument.
Exposed to direct sunlight
Exposed to high temperature In the presence of corrosive or explosive gases
Exposed to water,oil, other chemicals,
or solvents
Exposed to high humidity or condensation
Exposed to strong electromagnetic fields
Near electromagnetic radiators
Exposed to high levels of particulate
dust Near induction heating systems
(e.g., high-frequency induction heating
systems and IH cooking utensils)
Subject to vibration
• Ventilation holes for heat radiation are provided on the side and rear panels of the
instrument. Leave sufficient space around the ventilation holes and install the
instrument with the holes unobstructed. Installation of the instrument with the venti-
lation holes obstructed may cause a malfunction or fire.
• Do not place another PW3336 or measuring instrument or other heat-generating
device underneath or on top of this instrument. Doing so may damage the instru-
ment or cause burns or fire.
•
•
50 mm or more
50 mm or more
• Unplugging the power cord kills power to the instrument. Be sure to provide enough unobstructed space to
unplug the power cord immediately in an emergency.
• The instrument can be used with the stands flipped out.(p.21)
• To mount the instrument in a rack, refer to "Appendix 3 Rack Mounting" (p. A11)

Operating Precautions
6
Handling the Instrument
To avoid electric shock, do not remove the instrument's case.
The internal components of the instrument carry high voltages and may become very
hot during operation.
• Do not allow the instrument to get wet, and do not take measurements with wet
hands. This may cause an electric shock.
• Touching any of the high-voltage points inside the instrument is very dangerous.
Do not attempt to modify, disassemble or repair the instrument ; as fire, electric
shock and injury could result.
• To avoid damage to the instrument, protect it from physical shock when transporting and
handling. Be especially careful to avoid physical shock from dropping.
• After use, always turn OFF the power.
• Do not allow any conductive foreign objects to enter through the vents. Doing so may
cause damage to the instrument.
This instrument may cause interference if used in residential areas. Such use must be avoided unless the
user takes special measures to reduce electromagnetic emissions to prevent interference to the reception of
radio and television broadcasts.
Handling the Cables
• The maximum input voltage is 1000 V DC/AC and the maximum input current to the
current direct input terminals is 70 A DC/AC.
Attempting to measure a voltage or current in excess of each of the maximum inputs
could destroy the instrument and result in personal injury or death.
• The maximum rated voltage between input terminals and the ground is as follows;
(CAT II) 1000 V DC, 1000 V AC
(CAT III) 600 V DC, 600 V AC
Attempting to measure voltages exceeding this level with respect to ground could
damage the instrument and result in personalnjury.
• The external current sensor input terminals are not insulated. The terminals are
exclusive to the optional current sensors. Attempting to input a voltage or current
other than the output from the optional clamp sensors into the external current sen-
sor terminals could destroy the instrument and result in personal injury or death.
• When using the optional current sensors, do not measure a current in excess of the
current rating. This could destroy the instrument, the current sensor, or both. Also
this coud result in personal injury or death.
• This instrument should only be connected to the secondary side of a breaker, so the
breaker can prevent an accident if a short circuit occurs. Connections should never
be made to the primary side of a breaker, because unrestricted current flow could
cause a serious accident if a short circuit occurs.
• To avoid electrical accidents, confirm that all terminals are secure. The increased
resistance of loose connections can lead to overheating and fire.
(Tightening torque of the input terminals: 3 N·m)

Operating Precautions
7
Observe the following to avoid electric shock and short circuits.
• Turn off the power to lines to be measured before making connections to terminals
to be measured and turning on the instrument.
• Be sure to connect the voltage input and current input terminals correctly. An incor-
rect connection could damage or short circuit this instrument.
• When connecting wires to the voltage input terminals, be careful to avoid shorting
between one terminal and another with the wires.
• Since the screws of the terminals could be loosened, do not move the cables con-
nected to the terminals more than neccessary.
• Do not tie the cables connected to the input terminals in a bundle with the power
supply cord, the communication cables, the external I/O cables, or the current sen-
sor cables. This may cause damage.
• Avoid stepping on or pinching cables, which could damage the cable insulation.
• To avoid breaking the cables, do not bend or pull them.
• To avoid damaging the power cord, grasp the plug, not the cord, when unplugging it from
the power outlet.
• Keep the cables well away from heat sources, as bare conductors could be exposed if the
insulation melts.
Before Connecting
• Before turning the instrument on, make sure the supply voltage matches that indi-
cated on its power connector. Connection to an improper supply voltage may dam-
age the instrument and present an electrical hazard.
• To avoid electrical accidents and to maintain the safety specifications of this instru-
ment, connect the power cord provided only to a 3-contact (two-conductor + ground)
outlet.
See:Connection Methods : 2.3 Connecting the Power Cord (p.34)
• Use only the designated power cord with this instrument. Use of other power cords
may cause fire.
• Avoid using an uninterruptible power supply (UPS) or DC/AC inverter with rectangu-
lar wave or pseudo-sine-wave output to power the instrument. Doing so may dam-
age the instrument.
When connecting cables to the input terminals, the communication connectors, or the
external I/O terminals, observe the following to avoid electric shock and short circuits.
• Always turn off the power to the instrument and any device to be connected before
making connections.
• Be careful to avoid exceeding the ratings of the input terminals or external control
terminals.
• During operation, a wire becoming dislocated and contacting another conductive
object can be serious hazard. Use the screws to secure the communication connec-
tors.

Operating Precautions
8
Input and Measurement
• The maximum input voltage is 1000 V DC/AC and the maximum input current to the
current direct input terminals is 70 A DC/AC.
Attempting to measure a voltage or current in excess of each of the maximum inputs
could destroy the instrument and result in personal injury or death.
• The maximum rated voltage between input terminals and the ground is as follows;
(CAT II) 1000 V DC, 1000 V AC
(CAT III) 600 V DC, 600 V AC
Attempting to measure voltages exceeding this level with respect to ground could
damage the instrument and result in personal injury.
• The external current sensor input terminals are not insulated. The terminals are
exclusive to the optional current sensors. Attempting to input a voltage or current
other than the output from the optional clamp sensors into the terminals could
destroy the instrument and result in personal injury or death.
• To avoid the danger of electric shock, do not input a signal in excess of the ratings
to the external I/O terminals.
• This instrument should only be connected to the secondary side of a breaker, so the
breaker can prevent an accident if a short circuit occurs. Connections should never
be made to the primary side of a breaker, because unrestricted current flow could
cause a serious accident if a short circuit occurs.
When connecting
Observe the following to avoid electric shock and short circuits.
• Turn off the power to lines to be measured before making connections to input ter-
minals and turning on the instrument.
• When making connections, do not mix up the voltage input terminals (U) and the
current input terminals (I). In particular, do not input a voltage into the current input
terminals (between I and ±). Using the instrument with a faulty wiring will damage
the instrument or cause injury.
• Be careful to avoid shorting between the voltage input terminals with the wires.
When abnormalities such as smoke, unusual noise, or unusual odor are
observed
Stop the measurement immediately, and observe the following procedure. Using the
instrument in such a abnormal condition could cause death or injury.
1. Turn off the power switch of the instrument.
2. Disconnect the power cord from the outlet.
3. Turn off the power to the line to be measured.
Remove the measurement cables.
4. Contact your dealer or Hioki representative.

Operating Precautions
9
• For safety reasons, disconnect the power cord when the instrument is not used and before
connecting it to a device to be tested.
• To avoid damage to the instrument, do not input the voltage to the output terminals. Also do
not short between any terminals.
• When the instrument is turned off, do not apply voltage or current to the instrument. Doing
so may damage the instrument.
• Do not connect or disconnect connection cords from the current sensor or 9555-10 Sensor
Unit while the instrument is turned on. Doing so may damage the instrument, current sen-
sor, or 9555-10 Sensor Unit.
• Do not input current to the current sensor when it is not connected to the instrument or
when the instrument and 9555-10 Sensor Unit are turned off. Doing so may damage the
current sensor, instrument, or 9555-10 Sensor Unit.
• Correct measurement may be impossible in the presence of strong magnetic fields, such as near trans-
formers and high-current conductors, or in the presence of strong electromagnetic fields such as near
radio transmitters.
To measure accurately
• Warm up the instrument for more than 30 minutes before use.
• To maintain sufficient measurement accuracy of the instrument, be sure to help heat radiation.
e.g.) Keeping away the instrument from a heat, leaving sufficient clearances around the instrument,
installing cooling fans to the rack in which the instrument is mounted, or other measures.
• The recommended calibration interval of the instrument is one year.

Operating Precautions
10

1.1 Product Overview
11
The PW3336/ PW3337 is a power meter with power measurement capabilities for the full range of electrical
equipment, from single-phase devices such as battery-driven devices and household electronics to industrial-
use and three-phase electrical equipment.
The instrument provides coverage from DC to inverter frequencies with support for voltages up to 1,000 V and
direct-input currents of up to 65 A. It can also measure currents of up to 5,000 A using an optional current sensor.
• : These instruments provide two channels each of voltage
input and current input.
• : These instruments provide three channels each of voltage
input and current input.
• Since all channels are isolated, the instrument can simultaneously measure multiple circuits.
• It supports measurement lines from single-phase to 3-phase/4-wire.
• With 3-phase/3-wire measurement lines, the instrument can measure either voltage between lines (3V3A)
or phase voltage (3P3W3M) using vector calculations simply by switching its line setting (input terminal
connections remain the same).
• Accuracy is guaranteed for currents of up to 65 A with direct input.
• (The maximum input current is 70 A, ±100 Apeak.)
• An optional current sensor can be used to measure currents in excess of 65 A. (p.102)
• The instrument delivers a high fundamental accuracy of ±0.15% rdg. (at less than 50% of range, ±0.1% rdg.
±0.05% f.s.).
• Over a wide band from DC and 0.1 Hz to 100 kHz, the instrument covers not only the fundamental fre-
quency band for inverter-driven equipment, but also the carrier frequency band.
• Power factor effects are low at ±0.1% f.s. (with a internal circuit voltage/current phase difference of
±0.0573°), allowing high-accuracy measurement of active power during low power-factor operation, for
example during no-load testing of transformers and motors.
• The instrument can perform harmonic measurement in compliance with the IEC 61000-4-7:2002 interna-
tional standard on harmonic measurement methods.
• You can set an upper limit for the analyzed order from the 1st to 50th order according to the harmonic mea-
surement standard in use.
Overview Chapter 1
1.1 Product Overview
1.2 Features
Support for all power lines
Guaranteed accuracy up to 65 A with direct input
High-accuracy, wide-band performance
Standard harmonic measurement function complying with
IEC 61000-4-7:2002 (p.71)

1.2 Features
12
• Since processing for functions such as AC+DC (RMS), AC+DC Umn (voltage average value rectified RMS
equivalent), DC (DC component), AC (AC component), FND (fundamental wave component), and har-
monic measurement as well as integration measurement can be performed internally and in parallel, it is
possible to obtain simultaneous measured values simply by switching the display.
• Since the measurement range and other parameters can be set independently for each channel, it is possi-
ble to measure input-output efficiency for inverters and other power supply devices. (p.78)
• The active power level can be output for each cycle for the voltage or current assigned to the synchroniza-
tion source.
• Variations over extended periods of time can be recorded by using the instrument in conjunction with equip-
ment such as a recorder or data logger using level output (updated every 200 ms) for each channel’s volt-
age, current, and active power as well as associated sum values and three user-selected parameters.
• Safe, insulated waveforms can be observed using waveform output (equivalent to a sampling rate of
approximately 87.5 kHz) for each channel’s instantaneous voltage, instantaneous current, and instanta-
neous power.
• You can control the instrument or capture data from it using a computer by using the standard RS-232C or
LAN interface. (You can also communicate with a computer over USB by using a commercially available
USB serial conversion cable.)
• The instrument also provides a GP-IB interface, an essential capability when building such systems.
( )
• Simultaneous measurement can be performed by connecting two instruments with an optional BNC cable.
• Calculations, display updates, data updates, integration control, display hold timing, zero-adjustment, and
key lock operation of the instrument set as the slave (IN setting) are matched to the master instrument
(OUT setting).
Extensive measurement functionality, standard
High-speed D/A output to capture harsh load variations (p.88)
Building a system with 3 interfaces (p.117)
Synchronized control function with support for measurement of even
more channels (p.81)

1.3 Names and Functions of Parts
13
1.3 Names and Functions of Parts
The shift state is automatically canceled after Approx. 10 seconds. When the RECTIFIER key or a parameter
key is pressed, the shift state is canceled after Approx. 2 seconds.
Function setting status lamps
(for each channel) (p.18)
Light up to indicate when settings differ
from default settings.
CH/ RECTIFIER (p.46)
Switches the displayed channel and
rectifier (in the shift state).
Parameter keys (p.14)
Switch display parameters.
Warning lamps
(for each channel)
(p.19)
Current range (p.48)
(Pressing200mAinthe
shift state selects auto-
range operation.)
CH
Switches the chan-
nel to configure.
(For both voltage
and current)
POWER switch (p.35)
Turns the instrument on and off.
Front Panel
Display
Switches between measured
values and setting values.
Voltage range (p.48)
(Pressing 15 V in the
shift state selects auto-
range operation.)
e.g.) PW3337-03 HRM/ ORDER SEL
Harmonic display (switch among level, content percentage, and
normal display)
HOLD/ MAX/ MIN
Holds display values, switches between maximum and minimum
values (in the shift state).
SHIFT/ EXIT/ LOCAL
Activates/deactivates the shift state; exits settings mode or remote
mode.
START/STOP /DATA RESET
Starts/stops integration, resets integrated values (in the shift state).
Function setting
keys (p.40)
Configure functions.
Function setting status lamps
(p.18)
Light up to indicate activated func-
tions.

1.3 Names and Functions of Parts
14
Display parameters
Pressing on the first row, on the second row, on the third row, or on the fourth row of the measured
value display switches the display parameter, causing the selected display parameter to light up.
VVoltage (U)
A Current(I)
WActive power (P)
VA Apparent power (S)
Var Reactive power (Q)
PF Power factor (λ)
°Phase angle (φ)
V Hz Voltage frequency (f)
A Hz Current frequency (f)
Ah + Positive current integration
Ah - Negative current integration
Ah Current integration sum
Wh + Positive active power integration
Wh - Negative active power integration
Wh Active power integration sum
TIME Integration time
V pk Voltage waveform peak value (Upk)
A pk Current waveform peak value (Ipk)
η1 % Efficiency (η)
η2 % Efficiency (η)
CF V Voltage crest factor (Ucf)
CF A Current crest factor (Icf)
T.AV A Time average current (T.AV I)
T.AV W Time average active power (T.AV P)
RF V % Voltage ripple rate(Urf)
RF A % Current ripple rate(Irf)
THD V % Total harmonic voltage distortion (Uthd)
THD A % Total harmonic current distortion (Ithd)
θV ° CH1 CH2 Inter-channel voltage fundamental
wave phase difference (θU2-1)
θV ° CH1 CH3 Inter-channel voltage fundamental
wave phase difference (θU3-1)
θA ° CH1 CH2 Inter-channel current fundamental
wave phase difference (θI2-1)
θA ° CH1 CH3 Inter-channel current fundamental
wave phase difference (θI3-1)
HRM V LEVEL Harmonic voltage RMS value (Uk)
HRM A LEVEL Harmonic current RMS value (Ik)
HRM W LEVEL Harmonic active power (Pk)
HRM V % HD% Harmonic voltage content percentage
(UHDk)
HRM A % HD% Harmonic current content percentage
(IHDk)
HRM W % HD% Harmonic active power content per-
centage (PHDk)