Instruction Manual
3470
MAGNETIC FIELD HiTESTER
December 2008 Revised edition 4 3470A981-04 08-12H
Contents
i
Contents
Introduction ................................................................................1
Inspection ..................................................................................2
Safety Information ................... .................... ................... ...........4
Operating Precautions ................. ................... .................... .......6
1Overview 9
1.1 Product Overview ...............................................9
1.2 Features ........................................................... 11
1.3 Measurement Example ....................................13
1.4 Names and Functions of Parts .........................17
1.4.1 3470 Magnetic Field HiTester ............................17
1.4.2 3471 Magnetic Field Sensor ..............................21
1.4.3 3472 Magnetic Field Sensor ..............................22
1.5 Definition of Measurement Items ......................23
1.6 Screen Configuration and Key Operation
Work Flow ........................................................24
1.7 Measurement Work Flow ................................. 27
2 Measurement Preparations 29
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2.1 Supplying Power ..............................................29
2.1.1 Connecting the AC Adapter ..............................29
2.1.2 Inserting and Replacing Batteries ......................30
2.2 Connecting a Magnetic Field Sensor ...............32
2.3 Turning the Power On and Off .........................33
3 Measurement Procedure 35
3.1 Measurement Preparations ..............................3 5
3.2 Pre-measurement Check .................................37
3.3 Measuring Magnetic Flux Density .................... 38
3.4 Measuring Exposure Level (General Public) .... 41
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Index
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Contents
3.4.1 Preparing for Exposure Measurements .............41
3.4.2 Exposure Level ..................................................43
3.4.3 Measurement Procedure ...................................45
3.5 Measuring Exposure Level (Occup.) ................ 48
3.6 Holding Maximum Value of the Resultant
RMS Values .....................................................51
3.7 Checking and Deleting Saved Data .................52
3.7.1 Checking Saved Data ........................................52
3.7.2 Deleting Saved Data ..........................................54
3.7.3 Deleting All Saved Data .....................................57
4 Advanced Functions 59
4.1 Checking Remaining Battery Power ................. 59
4.2 Function for Saving Settings (Saving Set
Modes and Measurement Ranges) .................. 60
4.3 Initializing Function (Returning Settings to
Their Factory Defaults) .....................................61
4.4 Other Functions ................................................62
4.4.1 Setting Auto Power Off (Sav ing Battery Power) 62
4.4.2 Setting Audible Key Feedback ..........................64
4.4.3 Changing Unit Indication ....................... ............66
4.4.4 Setting the Slow Function ..................................68
4.4.5 Turning on the MEM. MODE key in MAX.
HOLD or output mode .......................................70
5 Using Application Software 73
5.1 Overview ..........................................................73
5.2 Installing ........................................................... 74
5.2.1 Installing the Driver ............................................74
5.2.2 Installing software ..............................................82
5.3 Graphic Representation of Measurement
Values ..............................................................85
5.4 Transferring Recorded Data to a PC ................ 88
5.5 Configuring the 3470 ........................................91
Contents
5.6 Viewing Version Information .............................93
6 Advanced Measurements 95
6.1 Outputting Waveform and Resultant
RMS Values .....................................................95
7 Specifications 101
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7.1 3470 Magnetic Field HiTester ........................101
7.1.1 Basic Specifications .........................................101
7.1.2 General Specifications .....................................103
7.1.3 Application Software ................................. .......104
7.1.4 Equations and Functions .................................105
7.2 3471 Magnetic Field Sensor ...........................107
7.3 3472 Magnetic Field Sensor ...........................108
8 Maintenance and Service 109
8.1 Troubleshooting ..............................................109
8.2 Error Indication ...............................................110
8.3 Version Display ..............................................110
8.4 Cleaning ......................................................... 110
8.5 Service ...........................................................110
Appendix 111
Appendix 1 ICNIRP Guideline (Basic Restrictions) ..111
Appendix 2 Coupling Factor in the ICNIRP
Guidelines .............................................112
Appendix 3 Graph Showing the Range of
ICNIRP 1998 Guidelines ....................... 113
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APP
Index
iv
Contents
Introduction
Thank you for purchasing the HIOKI “Model 3470 Magnetic Field HiTester.” To obtain maximum performance from the instrument, please
read this manual first, and keep it handy for future reference.
1
Introduction
This instruction manual contains instructions for use of the device
with the3471 and 3472 Magnetic Field Sensor.
Note
While every effort has been made to ensure that the content of this manual is correct, we would appreciate it if you notified your dealer or local
Hioki agent should you notice any unclear, incorrect or missing informa
tion.
Trademarks in this manual
Microsoft, Windows, and Windows NT are registered trademarks of
Microsoft Corporation in the United States and/or other countries.
Notation
• Unless otherwise specified, “Windows” represents Windows 98, Me,
Windows NT, Windows 2000, Windows XP.
• Dialog box represents a Windows dialog box.
• Menus, commands, dialogs, buttons in a dialog, and other names on
the screen and the keys are indicated in brackets.
Mouse Operation
Click: Press and quickly release the left button of the mouse.
Right-click: Press and quickly release the right button of the mouse.
Double click: Quickly click the left button of the mouse twice.
Drag: W hile ho lding dow n the left button of the mouse, move the
Activate: Click on a window on the screen to activate that window.
mouse and then releas e the left button to deposit the chosen item in the desired position.
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Inspection
Inspection
Verifying Package Contents
When you receive the instrument, inspect it carefully to ensure that no
damage occurred during shipping. If damage is evident, or if it fails to
operate according to the specifications, contact your dealer or Hioki rep
resentative.
3470-01 Magnetic Fiel d HiTester
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3470 (1) USB cable (1)CD (PC application
software) (1)
LR6 alkaline battery (4)
3471 Magnetic Field Sensor (1)
9445-02 AC Adapter
or
9445-03 AC Adapter (EU)
(1)
Carrying Case (1)
Instruction manual
(1)
Inspection
3470-02 Magnetic Fiel d HiTester
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3470 (1) USB cable (1)CD (PC application soft-
LR6 alkaline battery (4)
9758 Extention Cable
(1) 9759 Output Cable (1 ) Carrying Case (1)
ware) (1)
9445-02 AC Adapter
or
9445-03 AC Adapter (EU)
(1)
3471 Magnetic Field Sensor (1) 3472 Magnetic Field
Instruction man-
ual (1)
Sensor (1)
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This instrument has been calibrated to operate with the provided sensor and should be used only with this sensor. Thus if multiple instruments are used, Before use make sure that the matching number (up
to the hyphen) on the tester and the sensor are identical.
Shipping precautions
Use the original packing materials when transporting the instrument, if
possible.
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Safety Information
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. Be certain that you
understand the ins truct i ons and precautions in the manual before
use. We disclaim any responsibility for accidents or injuries not
resulting directly from instrument defects.
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 f ollowing sa fety precautions.
Safety Symbols
In the manual, the symbol indicat es p art icul ar ly im por tant 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 DC (Direct 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.
Indicates that incorrect operation presents a possibility of injury to the user or damage to the instrument.
Indicates advisory items related to performance or
correct operation of the instrument.
Other Symbols
(⇒ p. )
*
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Safety Information
Indicates the location of reference information.
Indicates that descriptive information is provided below.
Indicates a prohibited action.
Measurement Categories (Overvoltage categories)
To ensure safe operation of measurement instruments, IEC 61010
establishes safety standards for various electrical environments, catego
rized as CA T I to C AT IV, and call ed measurement cat egories. The se are
defined as follows.
CAT I : Secondary electrical circuits connected to an AC electrical
CAT II : Primary electrical circuits in equipment connected to an AC
CAT III : Primary electrical circuits of heavy equipment (fixed installa-
CAT IV : The circuit from the service drop to the service entrance, and
Higher-numbered categories correspond to electrical environments with
greater momentary
energy. So a measure
ment device designed for
CAT III envir onment s can
endure greater momen
tary energy than a device
designed for CAT II.
Using a measurement 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.
Never use a CAT I measuring instrument in CAT II, III, or IV enviro nment s.
The measurement categories comply with the Overvoltage Categories of
the IEC60664 Standards.
outlet through a transformer or similar device.
electrical outlet by a power cord (portable tools, household
appliances, etc.)
tions) connected directly to the distribution panel, and feeders
from the distribution panel to outlets.
to the power meter and primary overcurrent protection device
(distribution panel).
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Do not touch high voltage lines with the
sensor or the instrument. They are not
insulated and the application of high volt
age to this instrument may expose testing
personnel to high voltage that may at
worst lead to electric shock and death.
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6
Operating Precautions
Operating Precautions
Follow these precautions to ensure safe operation and to obtain the full
benefits of the various functions.
Preliminary Checks
• Before using the instrument the first time, verify that it operates normally to ensure that the no damage occurred during storage or shipping. If you find any damage, contact your dealer or Hioki
representative.
• Before using the instrument, make sure that the insulation on the
cables 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 repr esent ative for rep air.
Installation Environment
Operating temperature/humidity range: 0 to 40°C, 80%RH or less
(no condensation)
Temperature and humidity for guaranteed accuracy: -10 to 50°C,
80%RH or less (no condensation)
Avoid the following locations that could cause an accident or damage to the instrument.
Exposed to direct sunlight
Exposed to high temperature
Exposed to liquids
Exposed to high humidity
or condensation
Exposed to high levels of
particulate dust
In the presence of corrosive or explosive gases
Exposed to strong electromagnetic fields
Near electromagnetic
radiators
Subject to vibration
Connections
Connect only designated devices to the instrument terminals. To prevent damage, do not apply a voltage that is outside the specified range
to the instrument.
Handling
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Operating Precautions
• The instrument and the 3471 and 3472 Magnetic Field Sensors are
built mainly from nonmagnetic metals and contain hardly any mag
netic materials. Thus if the inst rument is heated by an all metal IH and
other induction heating system the sensor may melt or be damaged,
because of the nonmagnetic metals.
• The 3471 and 3472 Magnetic Field Sensors have a plastic housing that
may melt if brought into contact with a hot measurement object (cookpot
or other hot object).
• Do not expose cables t o exces siv e str ess as they may br eak . Esp ec iall y,
the 9758 Exten tion Ca ble and 975 9 Output C able shou ld be hand led with
care.
Handling with the CD
• Always hold the disc by the edges, so as not to make fingerprints on
the disc or scratch the printing.
• Never touch the recorded side of the disc. Do not place the disc
directly on anything hard.
• Do not wet the disc with volatile alcohol or water, as there is a possibility of the label printing disappearing.
• To write on the disc label surface, use a spirit-based felt pen. Do not
use a ball-point pen or hard-tipped pen, because there is a danger of
scratching the surface and corrupting the data. Do not use adhesive
labels.
• Do not expose the disc directly to the sun's rays, or keep it in conditions of high temperature or humidity, as there is a danger of warping,
with consequent loss of data.
• To remove dirt, dust, or fingerprints from the disc, wipe with a dry
cloth, or use a CD cleaner. Always wipe radially from the inside to the
outside, and do no wipe with circular movements. Never use abra
sives or solvent cleaners.
• Hioki shall not be held liable for any problems with a computer system
that arises from the use of this CD, or for any problem related to the
purchase of a Hioki product.
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Operating Precautions
1.1 Product Overview
Overview 1
1.1 Product Overview
The 3470 Magnetic Field HiTester is designed to measure magnetic flux
density and level of magnetic field exposure.
• It can be used to assess conformance to ICNIRP 1998 and EN50366
(IEC62233) and in research on magnetic field exposure.
• The instrument is designed to be used with the 3471 and 3472 Magnetic Field Sensors.
Make sure that the matching number (up to the hyphen) on the tester
and the magnetic field sensor are identical.
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• Magnetic field exposure refers to the exposure that may affect human
health.
The 3470 Magnetic Field HiTester can be used to measure conformance to Guidelines for Limiting Exposure to Time-varying Elec-
tric, Magnetic, and Electromagnetic Fields (ICNIRP 1998) and a
standard for measuring magnetic fields of electrical household
appliances (EN50366).
For more information on ICNIRP: "Appendix" (P.111)
• This tester can measure magnetic flux density and magnetic field
exposure generated by products manufactured at a customer site or
produced by devices in a customer environment.
It can measure magnetic flux density and magnetic field exposure
generated by products manufactured at a customer site or produced
by devices in a customer environment.
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1.1 Product Overview
Functions Functions in detail Reference
Basic Magnetic flux
Application Output
density
measurements
Exposure
level
measurements
functions
Application
software use
*1: Available units are T, G, and A/m and the magnetic permeability of air being 4π×10-7 H/m,
*2: This value is obtained by inverse filtering of magnetic flux density values stated in
Measuring the magnetic flux density of appli-
*1
ances and environments
Magnetic flux density (10 Hz to 400 kHz):
For wide range measurement s of magne tic fl ux densit y
Magnetic flux density (10 Hz to 2 kHz):
For magnetic flux density of power frequencies
Magnetic flux density (2 kHz to 400 kHz):
For magnetic flux density of hig h frequencies other
than power frequencies
*2
Measuring the exposure level of appliances
and environmen t s
Exposure level (general public):
This level is used f or measuring exposur e to magnetic fields prevalent in environments where we can
assume the presence of people of all age groups and
health conditions (people who are not normally
aware of the presence of magne tic field s) as well as
exposure to magnetic fields gener ated by appli anc
es and other consumer devices manufactured to
conform to EN50366 (or IEC6233) and other st an
dards.
This level corresponds t o the general public exp osure level in ICNIRP 1998.
Exposure level (occupational):
This level applies to measurements of exposure to
magnetic fields in environments that involve
adults only who are generally exposed under
known conditions and are trained to be aware of
potential risk and to take ap propriate prec autions.
This level corres ponds to the occupational ex po
sure level in ICNIRP 1998.
A function that makes it possible to output
3.3 (P . 38)
3.4 (P . 41)
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6.1 (P . 95)
3.5 (P . 48)
waveforms and resultant RMS value of magnetic flux density or exposure levels.
• This function allows you to do the following:
5 (P. 73)
• to set up the 3470 from your PC
• to upload data saved on the 3470 to your PC
• to monitor RMS values
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the relationships between th e differ ent uni ts are as fol lows : 1T=10
the ICNIRP1998 Guideline.
Use the exposure level figures indicated for the general public in IEC62233 or Since
the reference levels for magnetic field exposure indicated in ICNIRP1998 for occu
pational exposure is approximately five times that of general public exposure, the indicated values for occupational exposure is roughly a fifth of general public exposure.
"Appendix" (P.111)
G, 1 A/m=4π×10-7 T.
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How big is the magnetic field?
1.2 Features
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1.2 Features
Easy to view LCD displ ay
The large LCD display makes for ease of viewing measurement values.
Automatic recognition of magnetic field sensors
Two magnetic field sensors of different sizes, the 3471 and 3472, are
available for the tester
The 3471, inte nded fo r normal appli cation , has a cr oss- sectio nal a rea of
2
100 cm
The 3472 sensor has a cross-sectional area of 3 cm2 and is designed
for measuring d et a ile d di stri but ion .
The 3470 automatically recognizes an attached sensor so there is no
need to set a conversion rate whenever a sensor is connected.
Switchable measu re ment methods
The tester allows the user to switch between the following measurement
modes: magnetic flux density, exposure (General Public), and exposure
(Occup.).
Switchable axis
The user can switch between different axes (x-axis, y-axis and z-axis
and resultant values) in each measurement mode
.
3471
3472
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Waveform and resultant RMS value output
Both waveform ( ) and resultant RMS ( ) output can be
selected.
With a 9759 Output Cable you can connect the 3470 to an oscilloscope
or recorder for output of waveforms and resultant RMS values.
Waveform output :
Resultant RMS
value output :
enables measurement of magnetic field waveforms when
the tester is connected to an oscilloscope or recorder.
permits recording of resultant values on a recorder or logger, which is convenient for long-term measurements.
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1.2 Features
Memory function
Records up to 99 measurement data.
Function for saving settings
Measuring conditions can be stored to enable quick access to the same
operating conditions each time you power up.
Dual power supply
The tester can be powered both by battery and AC power to enable
measurements in the field as well as permitting installation for long-term
measurements.
1.3 Measurement Example
1.3 Measurement Example
This section provides a measurement example using this tester.
Objective: to measure magnetic field exposure generated by products to determine
whether they pass or fail the requirements to obtain a CE marking.
Measurement location : Anechoic chamber*1
Device under test : exposure level (general public) of magnetic
Measurement location, distance*2: around, 30 cm
State of device under test *2 : Half-filled with water, and maxiMeasurement time : a few seconds at each measurement point
fields generated by an electric rice cooker
*3
mum heat setting
DUT (device under test)
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Be sure to measure areas that
generate maximum exposure to
magnetic fields.
In this example, r1 = 30 cm.
Storage of measurement data: tester memory and PC memory
Required equipment : 3470
*1: A location where magnetic fields other than that generated by the DUT is minimal
and where the re are no magnet ic fie lds or me tal ob jects in the vi cinity that c ould be
affected by the measurements. An anechoic chamber is not required if the above
conditions can be met.
Measurements performed in an anechoic chamber should be performed at a certain distance from the walls, which are made of a magnetic material.
*2 : Since this state depends on the DUT, refer to the IEC62233, EN50366 or other rel-
evant specifications to determine the required state of the DUT during testing.
*3 : This value comes from IEC62233 Ed.1.0. Note that it may change when the stan-
dard is revised.
3471 or 3472 sensor
Batteries
AC adapter
Product whose magnetic field is to be
tested
PC
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1.3 Measurement Example
Preparations
1. Insert batteries in the tester or connect it to the AC adapter and fold
out the stand. Also connect the 3471 or 3472 M agnetic Field Sensors.
Insert th e sensor in the sensor
terminal.
Plug the adapter into the AC
adapter terminal and the
mains plug into an AC wall
outlet.
Insert batteries in the battery
compartment on the rear and fold
out the stand.
2. Connect the tester to a PC using a USB cable.
USB cable
3. Install the driver and the PC software on the PC.
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1.3 Measurement Example
Setup, measurements and data storage
1. Select Exposure (general public) measurement mode.
2. Select Auto range. ([AUTO] on the display lights. )
3. Place the magnetic field sensor near the DUT. (A distance of 30 cm if
the DUT is an electric cooker)
Read the indicated value and press
to save the m easurement data.
4. Read the indicated value and store the measurement data in the
tester.
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Processing data after measurement
1. Start up the software and transfer the measurement data stored in the
instrument to the PC.
2. Analyze the data transferred to the PC using Excel or other spreadsheet program.
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1.3 Measurement Example
Analysis flow chart
START
Measurement data ± accuracy
< 100%
*
Yes
≥100%
(Measurement data ± accuracy) ×
coupling factor (0 to 1)
≤100%*
Yes
≥100%
Exceeds
Does not comply
* : Whether tester accur acy sho uld be added or subt racted depen ds on th e sta ndpoint
of testing personnel. Refer to the instructions in the IEC62233 standards.
For details on the coupling factor, refer to Appendix 2 "Coupling Fa ctor in the ICNIRP Guidelines" (P.112).
*2 : This cannot be measured by a magnetic field tester.
Calculate the induced current
density with the human body
model and a numerical analysis.
Evaluation goes below the basic
restrictions.
Yes
Complies
1.4 Names and Functions of Parts
1.4 Names and Functions of Parts
1.4.1 3470 Magnetic Field HiTester
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1
Front
Display
(P. 20)
AC adapter terminal
Connect the AC adapter here.
2.1.1 (P. 29)
Back
Matching number
Use the tester with a sensor
that has an identical matching
number (up to the hyphen).
Sensor terminal
Connect the 3471, 3472
Magnetic Fi eld Sensor o r
a 9758 Extent ion Ca ble.
2.2 (P. 32)
Keys
(P. 18)
Output terminal
Connect a 9759 Output Cable.
USB terminal
Connect a USB cable.
Stand
When setting up the meter on a desk or other flat surface fold
out the stand to make sure that the magnetic field sensor
does not come into contact with the surface underneath.
6.1 (P. 95)
Camera tripod screw
Attach a commercially available camera tripod here.
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When using the
handle as a stand
for the device, do
not press down too
hard on the device
as this can damage the handle.
Battery
compartment lid
Open to insert or replace batteries.
2.1.2 (P. 30)
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1.4 Names and Functions of Parts
keys
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8
2
3
5
4
Keys Description
1
2 Switches magnetic fiel d mea sur em ent modes as sho w belo w:
3
4
5
6 Shows saved measurement data.
• Turns the power on and off.
• Holding down while turning on the power initia lizes the memory and
the saved settings (returning them to their factory defaults).
For details on the factory defaults: 4.3 (P. 61)
• Holding down th e whi le power in g up al lows you t o set the Au to po we r
off, audible key feedback, unit indication, slow function, and MEM.MODE
key
enable/disable.
4.4 (P. 62)
Magnetic flux density (10 Hz to 400 kHz) → magnetic flux density (10 Hz to 2 kHz) →
magnetic flux density (2 kHz to 400 kHz)
sure level (Occup.) → magnetic field density (10 Hz to 400 kHz) → ...
3.3 (P. 38)
• Swit ches between Auto and Manual ranges.
Manual range: (magnetic flux density mode) AUTO → r0 (2 μT/20 mG/1.6
A/m)→ r1 (20 μT/200 mG/16 A/m) → r2 (200 μT/2 G/160 A/m) → r3 (2 mT/
G/1600 A/m)→ AUTO...
20
(exposure level mode) AUTO → r0 (20%) → r1 (200%) → r2 (2000%) →
AUTO...
Auto range: automatically selects appropriate range during measurements.
• Switches measurement ranges duri ng ma nual range.
3.3 (P. 38)
• Magnetic flux density switching is performed by converting from T (Tesla).
For this reason, for example, 1.592 A/m is the maximum indicated value in
the 1.6 A/m range.
• Use to output.
• Switches between the following output functions.
OFF → Waveform output → r e s u ltant RMS va lue output → OFF...
• This mode disables the auto power off mode.
6.1 (P. 95)
• Holds the maximum value. (Each new maximum value updates the indicated
value.)
• Press this key again to unhold.
• 3.6 (P. 51)
3.7 (P. 52)
→ exposure level (General Public) → expo-
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1.4 Names and Functions of Parts
Keys Description
7
8 Switches the displayed axis as shown below:
• Stores measurement data in memory.
• Clears displayed measurement data when viewing memory data.
3.7 (P . 52)
XYZ→X→Y→Z→XYZ...(XYZ indicates a resultant value
1.5 "Definition of Measurement Items" (P.23)
*
) *:
X2+Y2+Z
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1.4 Names and Functions of Parts
Display
Note: Icons no t de scr i b ed be lo w c a nno t b e u s ed wi t h t his t e st e r
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1, 2
3, 4
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Memory
View Mode
Displays saved data.
3.7 (P . 52)
Magnetic flux density mode
Displays t he s ele c t ed ma gn eti c f lux d en s ity mode.
3.3 (P. 38)
Icons Description
1 Lights when Auto Range is selected.
2 Lights when measurement data is being stored.
3 Shows displayed axis. (XYZ indicates a resultant value*.)
*
1.5 "Definition of Measurement Items" (P.23)
4 Lights when holding a maximum value.
5 Lights when bat ter y vo ltage becomes too l ow. (Replace the batteries w hen t hi s
6 Lights during output of waveform.
7 Lights during output of a resultant RMS value.
8 Lights when automatic power off is on.
9 Indicates the number of the measurement data stored in memory.
10 Indicates that a measurement value is an RMS value.
11 Indicates the unit used for indicating exposure level.
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3.6 "Holding Maximum Value of the Resultant RMS Values" (P.51 )
icon lights.)
"Function for checking low battery voltage" (P.36)
3.7 "Checking and Deleting Saved Data" (P.52)
Flashes during the slow function is on.
3.4 "Measuring Exposure Level (General Public)" (P .41) ,3.5 "Measuring Exposure Level
(Occup.)" (P. 48)
• Indicates the unit used for indicating magnetic flux density.
3.3 "Measuring Magnetic Flux Density" (P.38)
• "mV" indication isn’t used in this instrument.
X2+Y2+Z
2
Exposure level mode
Displays the selected exposure level modes as
follows:
General Public
Occup. (Occupational)
3.4 (P. 41) ,3.5 (P. 48)
1.4 Names and Functions of Parts
1.4.2 3471 Magnetic Field Sensor
z
yx
Sensor
Output conn ector
Connects to the 3470 sensor
connector.
2.2 (P. 32)
Matching number
Use the tester with a sensor
that has an identical matching
number (up to the hyphen).
21
1
2
3
4
x-axis coil
The dotted line indicates the
x-axis coil.
x-axis
z-axis coil
z-axis
The dotted line indicates the
z-axis coil.
y-axis coil
The dotted line indicates the
y-axis coil.
y-axis
5
6
7
8
9
10
11
12
13
22
1.4 Names and Functions of Parts
1.4.3 3472 Magnetic Field Sensor
Output connector
Connects to the 3470 sensor connector.
2.2 (P. 32)
The line indicates the
x-axis coil.
z
yx
Matching number
Sensor
y-axis coil z-axis coil
The line indicates the
z-axis coil.
Use the tester with a sensor
that has an identical matching
number (up to the hyphen).
y-axis
x-axis
x-axis coil
z-axis
The line indicates the z-axis coil.
1.5 Definition of Measurement Items
)(tx)(ty)(tz)(ˆtx)(ˆty)(ˆt
)
ˆ
tR
)
ˆ
tR
)(ˆtx)(ˆty)(ˆtz)(tx)(ty)(t
1.5 Definition of Measurement Items
Instantaneous values obt ained from the x- axis, y-axis and z-axis sensors
at time t are referred to as, respectively,
RMS values are respectively , and . The RMS values used
by this tester represent the values shown below. (T when the slow function is turned off is about 0.12 s and about 1 s when the function is on.)
t
ˆ
tx
)(
ˆ
ty
)(
ˆ
tz
)(
1
=
=
=
∫
−
Tt
T
t
1
∫
−
Tt
T
t
1
∫
−
Tt
T
2
dttx
)}({
2
dtty
)}({
2
dttz
)}({
, and while the
z
23
1
2
3
4
A resultant RMS value represents the following.
ˆ
• The IEC62233 and EN50366 standards state that "Transient magnetic fields with a duration of less than 200 ms, e.g. during switching
events, are disregarded. If a switching action o ccurs d uring t he mea
surements, the measurement has to be repeated."
Transient responses may not be correctly measured when slow
function is off. Make a new measurement if this happens.
• T o make a 1 s measurement that includes transient responses, measure using the slow function while being mindful of the timing that
transient responses occur.
4.4.4 "Setting the Slow Function" (P.68)
The above can be summarized as shown below.
Resultant RMS value :
RMS value (per axis):
Instantaneous value (per axis):
These are the same both in magnetic flux density mode and exposure
level mode.
Resultant RMS and RMS values (for each axis) can be viewed on a
PC using the application software (on CD) supplied with the tester .
5.1 "Overview" (P.73)
ˆ
{}{}{}
)(
)(
(
ˆ
)(
222
ˆ
)(
tztytxtR ++=
(
, , :
, , :
-
LCD reading, RMS
:
output ( )
LCD reading
z
Waveform output
(
)
5
6
7
8
9
10
11
12
13
24
.
.
1.6 Screen Configuration and Key Operation Work Flow
1.6 Screen Configuration and Key Operation
Work Flo w
3.3 (P . 38)
Magnetic flux density mode
(10 Hz to 400 kHz)
3.3 (P . 38)
Press .
Magnetic flux density mode
(10 Hz to 2 kHz)
Measurement mode
Tindicates selected mode.
Magnetic flux density
mode
3.5 (P. 48)
Exposur level
(Occup.) mode
Exposure
level mode
Press
3.3 (P . 38)
Press .
Magnetic flux density mode
(2 kHz to 400 kHz)
Press .
3.4 (P. 41)
Exposure level
(General Public) mode
Press
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