Hioki PW3337, PW3336 Instruction Manual
Contents
Contents
i
1
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
PW3336A981-04
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 (Multipleinstrument 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
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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 Maximum 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
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
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
Chapter 6 Maintenance and
Service 177
6.1 Trouble Shooting ............................. 177
6.2 Error Indication ................................ 179
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Contents
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
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1
Introduction
Introduction
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.
Measurement
1
Guide
Offers an introduction to the instrument's basic measuring method for first time users.
Instruction Manual
2
(This document)
The models are classified according to the number of the input channels and the factory-installed options as
follows.
Model Number of input channels
Contains explanation and instructions regarding the instrument's operating method and
functions.
Show the model that is equipped with each function as the icon.
z : Installed − : Not installed
Factory-installed options
GP-IB D/A output
2 −−
2 z −
2 − z
2 zz
3 −−
3 z −
3 − z
3 zz
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 sensors". 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 CT9555 series Sensor Unit, which is option. Please refer to
the instruction manual of Model CT9555 series for details.
Trademark
Microsoft and Internet Explorer are either registered trademarks or trademarks of Microsoft Corporation in the
United States and other countries.
2
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
Confirming Package Contents
Confirming Package Contents
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 mea-
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 CT6862-05 AC/DC Current Sensor (50 A AC/DC)
Model CT6863-05 AC/DC Current Sensor (200 A AC/DC)
Model 9709-05 AC/DC Current Sensor (500 A AC/DC)
Model CT6865-05 AC/DC Current Sensor (1000 A AC/DC)
Model CT6841-05 AC/DC Current Probe (20 A AC/DC)
Model CT6843-05 AC/DC Current Probe (200 A AC/DC)
Model CT6844-05 AC/DC Current Probe (500 A AC/DC)
Model CT6845-05 AC/DC Current Probe (500 A AC/DC)
Model CT6846-05 AC/DC Current Probe (1000 A AC/DC)
Model 9272-05 Clamp on Sensor (20 A/200 A AC/DC)
Model CT9555 Sensor Unit
Model CT9556 Sensor Unit
Model CT9557 Sensor Unit
Model L9217 Connection Cord
surements)
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 measuring instruments are to use the instrument, another person familiar with such
instruments must supervise operations.
3
Safety Information
This manual contains information and warnings essential for safe operation of the instrument and for maintaining it in safe operating condition. Before using it, be sure to carefully read the following safety precautions.
Safety Symbols
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
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
Indicates a grounding terminal.
Indicates AC (Alternating Current).
The following symbols in this manual indicate the relative importance of cautions and warnings.
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.
symbol) before using the relevant function.
Indicates that incorrect operation presents a possibility of injury to the user or damage to the instrument.
Symbols for Various Standards
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 EU Directive.
4
Safety Information
Notation
Indicates the prohibited action.
(p. ) Indicates the location of reference information.
* Indicates that descriptive information is provided below.
SET
(Bold character)
The screen of this instrument displays characters in the following manner.
Names of settings, buttons, and other screen elements are enclosed in brackets.
Accuracy
We define measurement tolerances in terms of f.s. (full scale), rdg. (reading) and dgt. (digit) values, with the
following meanings:
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 value that causes the digital display to show a "1" as the least-significant digit.
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories.
• 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.
This instrument conforms to the safety requirements for CAT II 1000 V, CAT III 600 V measuring instruments.
CAT II
CAT III
CAT IV
When directly measuring the electrical outlet receptacles of the primary electrical circuits in equipment connected to an AC electrical outlet by a power cord (portable tools, household appliances, etc.)
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.
When measuring the circuit from the service drop to the service entrance, and to the power meter and primary
overcurrent protection device (distribution panel).
5
50 mm or more
50 mm or more
Operating Precautions
Operating Precautions
Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions.
Before Use
• 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 electric shock, so contact your dealer or Hioki representative for replacements.
Instrument Installation
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
Avoid the following locations that could cause an accident or damage to the instrument.
Exposed to direct sunlight
Exposed to high temperature
Exposed to water, oil, other chemicals,
or solvents
Exposed to high humidity or condensation
Exposed to high levels of particulate
dust
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 ventilation 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 instrument or cause burns or fire.
•
•
In the presence of corrosive or explosive
gases
Exposed to strong electromagnetic fields
Near electromagnetic radiators
Near induction heating systems
(e.g., high-frequency induction heating
systems and IH cooking utensils)
To prevent overheating, be sure to leave the specified clearances around the unit.
• 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)
6
Operating Precautions
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 sensor 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)
7
Operating Precautions
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 incorrect 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 connected 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 sensor 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 indicated on its power connector. Connection to an improper supply voltage may damage the instrument and present an electrical hazard.
• To avoid electrical accidents and to maintain the safety specifications of this instrument, 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 rectangular wave or pseudo-sine-wave output to power the instrument. Doing so may damage 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 connectors.
8
Operating Precautions
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 terminals 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.
9
Operating Precautions
• 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 CT9555 series
Sensor Unit while the instrument is turned on. Doing so may damage the instrument, current sensor, or CT9555 series Sensor Unit.
• Do not input current to the current sensor when it is not connected to the instrument or
when the instrument and CT9555 series Sensor Unit are turned off. Doing so may damage
the current sensor, instrument, or CT9555 series Sensor Unit.
• Correct measurement may be impossible in the presence of strong magnetic fields, such as near transformers 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.
• The warranty period of the instrument is three years.
10
Operating Precautions
11
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)
1.1 Product Overview
Overview Chapter 1
1.1 Product Overview
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 industrialuse and three-phase electrical equipment.
The instrument provides coverage from DC to inverter frequencies with support for voltages up to 1000 V and
direct-input currents of up to 65 A. It can also measure currents of up to 5000 A using an optional current sensor.
1.2 Features
• : 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 frequency 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 international 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 measurement standard in use.
12
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)
1.2 Features
• 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 harmonic 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 possible 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 synchronization source.
• Variations over extended periods of time can be recorded by using the instrument in conjunction with equipment such as a recorder or data logger using level output (updated every 200 ms) for each channel’s voltage, 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 instantaneous 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).
1.3 Names and Functions of Parts
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)
(Pressing 200 mA in the
shift state selects autorange operation.)
CH
Switches the channel 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 autorange 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 functions.
1.3 Names and Functions of Parts
13
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.
14
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.
V Voltage (U)
A Current(I)
W Active 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)
θ V ° CH1 CH2
Inter-channel voltage fundamental
wave phase difference (θU2-1)
θ V ° CH1 CH3
Inter-channel voltage fundamental
wave phase difference (θU3-1)
θ A ° CH1 CH2
Inter-channel current fundamental
wave phase difference (θI2-1)
θ A ° 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 percentage (PHDk)
1.3 Names and Functions of Parts
Display parameters
1.3 Names and Functions of Parts
DC AC
When using the AC+DC rectifier, both the DC and AC lamps light
up.
DC AC Umn
When using the AC+DC Umn rectifier, the DC, AC, and Umn
lamps light up.
DC Lights up when using the DC rectifier.
AC Lights up when using the AC rectifier.
FND Lights up when using the FND rectifier.
LEVEL
Lights up when the instrument is displaying a harmonic component level (harmonic voltage RMS value, harmonic current RMS
value, or harmonic active power).
HD%
Lights up when the instrument is displaying a harmonic content
percentage (harmonic voltage content percentage, harmonic
current content percentage, or harmonic active power content
percentage).
CH1
Lights up when the instrument is displaying the CH1 measured
value for the selected display parameter.
CH2
Lights up when the instrument is displaying the CH2 measured
value for the selected display parameter.
CH3
Lights up when the instrument is displaying the CH3 measured
value for the selected display parameter.
sum
Lights up when the instrument is displaying the measured value
for the sum of the selected display parameters when using a wiring mode other than 1P2W.
Rectifier indicator lamps (p.47)
Harmonic measurement (HARMONICS) lamps (p.71)
15
CH1, CH2, CH3, and sum lamps
16
RUN
Indicates the status of integration based on START/STOP key
operation or communications.
RUN lamp on: Integration active
RUN lamp flashing: Integration stopped
RUN lamp off: Integration reset
RUN EXT
Indicates the status of integration based on external control.
RUN lamp on, EXT lamp on: Integration active
RUN lamp flashing, EXT lamp on: Integration stopped
RUN lamp and EXT lamp off: Integration reset
HOLD
Lights up when display hold is activated by pressing the HOLD
key.
To cancel display hold: Pressing the HOLD key once more
causes the display hold state to be canceled and the HOLD lamp
to be turned off.
MAX
When the HOLD, MAX, and MIN lamps are all off, pressing the
SHIFT key and then the HOLD key causes the maximum value
to be held and the MAX lamp to light up.
MIN
Pressing the HOLD key while the MAX lamp is lit up (indicating
that the maximum value is being held) causes the minimum value to be held and the MIN lamp to light up.
Pressing the HOLD key while the MIN lamp is lit up (indicating
that the minimum value is being held) causes the minimum value
hold to be canceled, returning to the normal measured value display.
1.3 Names and Functions of Parts
Integration (INTEGRATOR) status indicator lamps (p.62)
Hold (HOLD) status indicator lamp (p.108)
Wiring (WIRING) mode indicator lamps (p.40)
These lamps light up when the following wiring modes are selected:
1P2W×2 1-phase/2-wire × 2 circuits (CH1 and CH2 are 1-phase/2-wire.)
1P3W 1-phase/3-wire
3P3W
3-phase/3-wire, active power measurement using the two-power-meter method
3P3W2M
3-phase/3-wire, active power measurement using the two-power-meter method (Displays line voltage and phase current, which
are not measured, using vector calculations.)
1P2W×3
1-phase/2-wire × 3 circuits (CH1, CH2, and CH3 are 1-phase/2wire)
1P3W&1P2W
1-phase/3-wire & 1-phase/2-wire (CH1 and CH2 are 1-phase/3wire, Active power is measured by 2-power measurement method, and CH3 is 1-phase/2-wire.)
3P3W&1P2W
3-phase/3-wire & 1-phase/2-wire (CH1 and CH2 are 3-phase/3wire, and CH3 is 1-phase/2-wire.)
3P3W2M
3-phase/3-wire, active power measurement using the two-power-meter method (Displays wire voltage and phase current,
which are not measured, using vector calculations.)
3V3A
3-phase/3-wire, active power measurement using the two-power-meter method (Actually measures and displays all wire voltages and phase currents.)
3P3W3M
3-phase/3-wire (Converts and displays wire voltages and phase
voltages using vector calculations with 3V3A wiring.)
3P4W 3-phase/4-wire
17
1.3 Names and Functions of Parts
18
These lamps indicate the instrument’s overall setting status. They light up
when the corresponding function is ON.
AVG
Lights up when the number of averaging iterations is
set to a value other than the default value of 1.(p.57)
HRM LIMIT
Lights up when the harmonic analysis order upper limit
is set to a value other than the default value of 50.(p.71)
SYNC. OUT
Lights up when the synchronized measurement I/O setting is set to OUT (Master). Flashes with external synchronized signal input when set to IN (Slave). Turns off
when set to OFF.(p.81)
D/A WAVE
Lights up when the D/A output setting is set to waveform/high-speed active power level output (the default
setting is level output). (p.88)
KEY LOCK Lights up when key operation is disabled. (p.111)
REMOTE
Lights up when the instrument is in remote operation
mode. (p.134)
These lamps indicate the setting status for each channel. Function lamps light up
when set to a value other than the default setting.
SYNC. DC
Lights up when the synchronization source is set to DC (the
default setting is each channel’s voltage: U1, U2, and U3).
(p.51)
EXT. SENSOR
Lights up when the current input method setting is set to
TYPE1 or TYPE2 (current sensor input) (the default setting
is OFF [current value direct input]). (p.42)
CT
Lights up when the CT ratio setting is set to a value other
than the default setting of 1. (p.59)
VT
Lights up when the VT ratio setting is set to a value other
than the default setting of 1. (p.59)
FREQ. 200kHz
Lights up when the zero-cross and frequency measurement
filter setting is set to 100 Hz, 5 kHz, or 200 kHz (the default
setting is 500 Hz). (p.53)
TIME OUT 1s/10s
Lights up when the synchronization detection timeout is set
to 1 sec. or 10 sec. (the default setting is 0.1 sec.). (p.55)
U AUTO RANGE
Lights up when the voltage measurement range is set to
auto range (the default setting is auto range OFF). (p.48)
I AUTO RANGE
Lights up when the current measurement range is set to
auto range (the default setting is auto range OFF). (p.48)
1.3 Names and Functions of Parts
Setting status indicator lamps
When the VT and CT lamps are lit up, note that voltage and current inputs differ from the
displayed measured values.
Warning (WARNING) indicator lamps
These lamps indicate channel warnings. When the following warning lamps and error lamps are lit up, they indicate a hazardous state or inability to perform measurement accurately:
PEAK OVER U
Lights up when an overvoltage input warning occurs, indicating that the input voltage peak value has exceeded
±1500 V or ±600% of the voltage measurement range.
PEAK OVER I
Lights up when an overcurrent input warning occurs, indicating that the input current peak value has exceeded ±100
A or ±600% of the current measurement range.
SYNC. ERROR
Lights up when a synchronization error occurs, indicating
that synchronization cannot be detected.
HRM ERROR
Lights up when a harmonic measurement synchronization
error occurs, indicating that the harmonic measurement
synchronization frequency range was exceeded.
These lamps light up in response to settings on the following setting screens:
CH SET
Channel settings
• Synchronization source
• Current input method
•CT ratio
•VT ratio
• Zero-cross and frequency measurement filter
• Synchronization detection timeout
MEAS. SET
Shared settings that apply to all channels
• Integration time
• Number of averaging iterations
• Harmonic analysis upper limit order
• Synchronized measurement I/O (master, slave)
• D/A output
INTERFACE
Interface settings
• RS-232C
•GP-IB
•LAN
19
1.3 Names and Functions of Parts
Setting screen indicator lamps
20
Manufacturer's Serial No.
Model name number
Shows the serial number.
Do not remove this label, as it is
required for product support.
Voltage input terminal (U )
Input voltage signals. (p.28)
Rear
MAC address of the
LAN
e.g.) PW3337-03
GP-IB connector
Connect a communications cable when using the
GP-IB interface. (p.131)
External synchronization terminal
Connect a cable for synchronized
measurement. (p.81)
Power Inlet
(p.34)
D/A Output terminal
*
(D/A OUTPUT)
The voltages listed below
are output from each
terminal. (p.88)
RS-232C connector
Connect a communications
cable when using the RS232C interface. (p.118)
External current sensor
input terminal
(CURRENT SENSOR)
Connect current sensors. (p.102)
LAN connector
Connect a communications cable when using the LAN interface. (p.122)
External control terminal
(EXT. CONTROL)
Input signals from an integration
external control function. (p.85)
Current input terminal ( I )
Input current signals. (p.28)
1.3 Names and Functions of Parts
*D/A OUTPUT terminals
The following voltages are output from each terminal.
Level output: Level (analog) output is updated at an interval of approximately 200 ms.
Instantaneous waveform output: The input waveform as sampled at a frequency of approximately 87.5 kHz is output.
High-speed active power level output: The active power for every cycle for the voltage or current set as the synchronization
source is output.
U1/u1, U2/u2, U3/u3
I1/i1, I2/i2, I3/i3
P1/p1, P2/p2, P3/p3
Psum/Hi-Psum
Hi-P1, Hi-P2, Hi-P3
DA1, DA2, DA3
Key processing is embedded in the instrument for production and verification purposes. For example, this
processing includes transitioning to an adjustment mode. If key operation causes a message or indication
that is not described in this manual to be displayed, immediately cycle the instrument’s power.
Generates voltage level output or instantaneous voltage waveform output (set to one or the
other) for each channel.
Generates current level output or instantaneous current waveform output (set to one or the
other) for each channel.
Generates active power level output or instantaneous power waveform output (set to one or
the other) for each channel.
(P3/p3 is generated by only.)
Generates active power sum level output or high-speed level output (set to one or the other)
for wiring modes other than 1P2W.
Generates active power high-speed level output for each channel.
(Hi-P3 is generated by only.)
Generates level output for three of the following parameters for each channel and as a sum
(sum value) as selected by the user:
Voltage, current, active power, apparent power, reactive power, power factor, phase angle,
voltage total distortion, current total distortion, voltage crest factor, current crest factor, voltage ripple rate, current ripple rate, voltage frequency, current frequency, efficiency, current
integration, and active power integration
21
Bottom panel
This instrument can be rack mounted.
See: Appendix 3 Rack Mounting(p. A11)
Parts removed from this instrument should be stored in a
safe place to enable future reuse.
Left side
When using the stands
Open the stands until they clicks into place. Be sure
to use both stands.
When folding up the stands
Fold up the stands until they click into place.
Right side
Vents
Keep clear of obstructions.
1.3 Names and Functions of Parts
Do not apply heavy downward pressure with the stand extended. The stand could be damaged.
22
Installing the Instrument (p.5)
CHECKS
• Are the wires from the measurement targets shut off?
• Is the instrument turned off, and has the power cord been disconnected?
• Using D/A output (p.88)
• Using synchronized control to conduct measurements with 2
instruments simultaneously (p.81)
• Using external control to control integration (p.62)
• Sending and receiving data with the RS-232C, LAN, and GP-IB
interfaces (p.117)
Connecting Wires and Cords
Connect the measurement lines to the instrument and then connect the power cord to the instrument.
CHECKS
• Is the instrument connected on the secondary side of the circuit
breaker?
• Does the circuit being used exceed 1000 V?
• Does the voltage or current being measured exceed 1000 V or 70
A, respectively?
If so, use VT and CT.
• Are appropriate types of wire being used to connect to the voltage
and current input terminals?
Use solderless terminals that cover wiring with insulation. When
using solderless terminals with exposed metallic parts, use wire
with adequate dielectric strength and current capacity.
• Has the wiring been shorted?
• Are the input terminals loose?
• Have wires been connected properly?
Connect wires. (p.28)
e.g.)
Connect the power cord. (p.34)
When using one or more current sensors, see "3.9 Using a Current Sensor" (p.102).
Turning on the instrument (p.35)
Before turning on the instrument, verify that the wires have been connected properly one more time.
After displaying the initial screen, the instrument will display input values under the current settings.
Allow the instrument to warm up for at least 30 minutes.
Perform zero-adjustment.
To fulfill the instrument’s accuracy specifications, be sure to perform zero-adjustment for the voltage
and current measured values.
1.4 Measurement Workflow
1.4 Measurement Workflow
1 Install the instrument, connect wires and cords, and
turn on the instrument.
23
Selecting the wiring mode (p.40)
Setting the current input method (p.42)
Selecting display parameters (p.44)
Selecting voltage and current ranges (p.48)
Setting the synchronization source (p.51)
Selecting rectifiers (p.47)
1.4 Measurement Workflow
2 Configure instrument settings. (These settings can
also be changed during measurement.)
24
Configure the following settings as necessary:
Setting the frequency measurement range
See: "3.2.6 Setting the Frequency Measurement Range" (p.53)
Addressing display value variation: Displaying average measured values
See: "3.2.8 Displaying Measured Values as an Average (AVG: Averaging)" (p.57)
Measuring voltages in excess of 1000 V: Using VT (PT) to make measurements
See: "3.2.9 Setting the VT and CT Ratio" (p.59)
Measuring currents in excess of 65 A: Using CT to make measurements
See: "3.2.9 Setting the VT and CT Ratio" (p.59)
When you wish to perform integration
See: "3.3 Integration" (p.62)
When you wish to measure harmonics
See: "3.4 Viewing Harmonic Measured Values" (p.71)
When you wish to measure efficiency
See: "3.5 Measuring Efficiency" (p.78)
When you wish to use the display hold, maximum value hold, and minimum value
hold functions
See: "3.10.1 Fixing Display Values (Display Hold)" (p.108)
"3.10.2 Displaying Peak, Minimum, and Maximum Values (Maximum Value Hold)" (p.109)
When you wish to use D/A output
See: "Examples of analog output"(p.98)
When you wish to use the RS-232C interface
See: "Setting the RS-232C communications speed"(p.119)
When you wish to use the LAN interface
See: "Setting the LAN’s IP address"(p.123)
When you wish to use the GP-IB interface
See: "Setting the GP-IB address"(p.133)
When you wish to perform synchronized measurement with multiple instruments
See: "3.6 Performing Synchronized Measurement with Multiple Instruments (Multiple-instrument Syn-
chronized Measurement)" (p.81)
1.4 Measurement Workflow
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