Instruction Manual
3144-20
NOISE SEARCH TESTER
Aprio 2013 Revised edition 5 3144A981-05 13-04H
i
Contents
Contents
Introduction ...............................................................1
Inspection..................................................................1
Safety Notes .............................................................2
Operating Precautions..............................................5
Chapter 1 Overview 11
1.1 Product Overview......................................11
1.2 Features....................................................13
1.3 Names and Functions of Parts..................14
1.4 Quick Reference........................................21
Chapter 2 Measurement Preparations 25
2.1 Attaching the Strap....................................26
2.2 Installing the Batteries...............................27
2.3 Connecting the AC Adapter.......................29
2.4 Connecting the 9741 CLAMP ON
VOLTAGE SENSOR............................. .. ..30
2.4.1 Connecting the Sensor to the
Voltage Sensor Input Terminal.......30
2.4.2 Connecting the Instrument to the
Line being Measured......................32
2.5 Connecting Signals to the BNC Input
Terminal ....................................................34
2.6 Connecting to Ground...............................36
2.7 Turning the Power On/Off.........................38
2.8 Connecting the Earphone..........................40
2.9 Connecting Signals to the
Output Terminal.........................................41
Contents
ii
Chapter 3 Setup and Measurement 43
3.1 Sample Measurement........................... .... 43
3.2 Monitoring Measurement Data [MONI] ..... 48
3.3 Recording Data [REC]............. ..................50
3.4 Deleting Memory ....................................... 53
3.5 Viewing Recorded Data [VIEW]................ 54
3.6 Setting Date and Time.............................. 55
Chapter 4 Analysis of Recorded Data 57
4.1 General.....................................................57
4.2 Installing Software Drivers ........................ 58
4.3 Installing PC Application Software............ 60
4.4 Setting the Clock ....................................... 61
4.5 Transferring Data to the PC...................... 63
4.6 Analyzing Recorded Data on the PC ........ 68
4.7 Saving Images of Waveform Windows ..... 75
4.8 Printing a Waveform Window....................76
4.9 Analyzing Saved Recorded Data with
Excel .........................................................78
4.10 Error Information.......................................79
Chapter 5 Specifications 83
5.1 Main Unit Specifications............................83
5.2 Clamp Specifications......... ... .....................90
iii
Contents
Chapter 6 Maintenance and Service 93
6.1 Battery Replacement.................................93
6.2 Cleaning and Storage................................94
6.3 Repair and Servicing.................................94
6.4 Error Indications and Corrective Action.....95
6.5 System Mode.................................. ..........96
6.6 Instrument Disposal.................................101
Contents
iv
1
Introduction
Thank you for purchasing the HIOKI "Model 314420 NOISE SEARCH TESTER." To obtain maximum performance from the instrument, please
read this manual first, and keep it handy for future
reference.
Registered Trademarks:
Windows and Excel are registered trademarks of
Microsoft Corporation in the United States and/or
other countries.
Inspection
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.
Confirming package contents
• 9741 CLAMP ON VOLTAGE SENSOR..........1
• Instruction Manual..........................................1
• LR6 alkaline batteries.....................................6
• 9445-02 AC ADAPTER or
9445-03 AC ADAPTER..................................1
• PC software(CD-R) ........................................1
• USB cable......................................................1
• Earphone........................................................1
• Strap...............................................................1
• Carrying case.................................................1
Introduction
Safety Notes
2
Safety Notes
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.
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 correspond-
ing topic in the manual (marked with the
symbol) before using the relevant function.
Indicates a double-insulated device.(9741)
Indicates a grounding terminal.
Indicates DC (Direct Current).
3
Safety Notes
Symbols in Use
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.
Indicates the prohibited action.
Indicates the location of reference information.
Accuracy
We define measurement tolerances in terms of f.s.
(full scale) and rdg. (reading) with the following
meanings:
• f.s. (maximum display value or scale length)
The maximum displayable value or scale length.
This is usually the name of the currently selected
range.
• rdg. (reading, displayed or indicated value)
The value currently being measured and indicated on the measuring instrument.
Safety Notes
4
The 9741 CLAMP ON VOLTAGE SENSOR complies with
CAT III 200 V safety requirements.
To ensure safe operation of measurement instrument, IEC
61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories.
CAT II Primary electrical circuits in equipment connected to
an AC electrical outlet by a power cord (portable
tools, household appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III Primary electrical circuits of heavy equipment (fixed
installations) connected directly to the distribution
panel, and feeders from the distribution panel to outlets.
CAT IV The circuit from the service drop to the service en-
trance, and to the power meter and primary overcurrent protection device (distribution panel).
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.
Use of a measurement instrument that is not CAT-rated in
CAT II to CAT IV measurement applications could result in a
severe accident, and must be carefully avoided.
Measurement categories
5
Operating Precautions
Before Use
Installation, Operating Environment, and Handling
of the Instrument
Operating Precautions
Follow these precautions to ensure safe operation
and to obtain the full benefits of the various functions.
• 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 9741 CLAMP ON VOLTAGE
SENSOR 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 repair.
• Do not allow the instrument to get wet, and
do not take measurements with wet hands.
This may cause an electric shock.
• Do not use the instrument where it may be
exposed to corrosive or combustible
gases. The instrument may be damaged or
cause an explosion.
Operating Precautions
6
Operating Environment
Observe the following to avoid damage to
the instrument.
• Installation and Operating Environment
Between 0°C and 40°C; 80% RH or less;
indoors only.
• Do not store or use the instrument where it
could be exposed to direct sunlight, high
temperature or humidity, or condensation.
Under such conditions, the instrument may
be damaged and insulation may deteriorate so that it no longer meets specifications.
• This instrument is not designed to be
entirely water- or dust-proof. To avoid damage, do not use it in a wet or dusty environment.
• Do not use the instrument near a device
that generates a strong electromagnetic
field or electrostatic charge, as these may
cause erroneous measurements.
• To avoid damage to the instrument, protect
it from vibration or shock during transport
and handling, and be especially careful to
avoid dropping.
7
Operating Precautions
Handling of Cables
• To avoid corrosion from battery leakage,
remove the batteries from the product if it
is to be stored for a long time.
• Adjustments and repairs should be made
only by technically qualified personnel.
• If the protective functions of the product
are damaged, either remove it from service
or mark it clearly so that others do not use
it inadvertently.
Accurate 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 avoid breaking the cables, do not bend or pull
them.
• Avoid stepping on or pinching cables, which
could damage the cable insulation.
Operating Precautions
8
T erminals
• The instrument is provided with various
types of external connectors. When plugging cables into the connectors, be carefu l
not to misconnect.
• The voltage sensor input terminal of the
instrument is dedicated to the 9741
CLAMP ON VOLTAGE SENSOR. Be sure
to use the 9741 sensor specified by HIOKI.
Keep in mind that using any other type of
sensor may result in electric shock or malfunction.
• Note the following maximum input voltage
and maximum rated voltage to earth of the
BNC input terminal. If their voltages are
exceeded, this device will be damaged and
personal injury will result. Therefore, do
not perform measurement in this case.
Maximum input voltage: 5 V
PEAK
Maximum rated voltage to earth: 5 V
To protect against dirt and dust, always leave the
protective cover in place, unless using the terminals.
9
Operating Precautions
Care and Handling of CD-R
• 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 spiritbased 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.
• T o 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 abrasives or solvent cleaners.
• Hioki shall not be held liable for any problems
with a computer system that arises from the use
of this CD-R, or for any problem related to the
purchase of a Hioki product.
• In the interests of ongoing product developments, there may be minor discrepancies
between screen displays and the operating
instructions, and in the data conversion process.
• Hioki shall not be held liable for any problems
with a computer system that arises from the use
of this CD-R, or for any problem related to the
purchase of a Hioki product.
Operating Precautions
10
11
Chapter 1 Overview
Overview Chapter 1
1.1 Product Overview
Noise is propagated through diverse routes such
as communication lines and power supply lines.
Many cases of trouble, including false operation
and malfunction caused by noise, are currently on
the rise. To avoid such trouble, it is essential to
identify the noise frequency bands and routes
through which noise enters, and to take appropriate corrective action.
The 3144-20 NOISE SEARCH TESTER can
search for noise frequency bands and routes of
penetration by simply clamping the 9741 CLAMP
ON VOLTAGE SENSOR to the line being measured.
Moreover, the logging function of the instrument
enables long-time monitoring. The USB interface
allows recorded data to be transferred to a PC,
displayed in graphs, and output to a printer.
Chapter 1 Overview
12
Cell phone
Penetrates through
communication
lines
Penetrates through power
supply lines
Extension line
Lighting apparatus
Home appliances
Power supply
lines
Communication lines
Penetrates through
ground wires
Main unit
3144-20
Penetrates directly
Noise sources:
There are many noise sources, such as power
transmission lines, electric railways, inverter units,
and CB radios.
Penetration routes:
Some noise enters through communication lines,
power supply lines, and ground wires, while other
noise penetrates devices directly.
Propagation routes:
Noise is propagated through various routes,
including communication lines and power supply
lines.
The instrument can search for noise frequency
bands and penetration routes by simply attaching
the 9741 CLAMP ON VOLTAGE SENSOR.
13
1.2 Features
Noncontact type of voltage sensor
Searches for noise in a system in operation, without affecting circuits currently in communication or
damaging cables.
Measuring frequency band range: 500 Hz
to 30 MHz
Covers a wide band ranging from noise on power
transmission lines to that of CB radios.
Noise indicated on a large-LCD level
meter
Indicates detected noise on a level meter, separately by frequency band.
PEAK HOLD function
Indicates the peak value in each frequency band
and the time measured.
Memory function for up to 64,000 items of
data
Records measurement data and measurement
times for up to 64,000 items of data.
Equipped with USB interface
Using the PC software supplied with the instrument enables the transfer of data to a PC, display
of time series data, and output to a printer.
Compatible with two different power
sources: Batteries and AC adapter
Applicable to field measurements, given its portability and long-time monitoring capability.
Handy type
A compact, lightweight noise measuring tool that
can be used just like a simple circuit-tester.
Chapter 1 Overview
Chapter 1 Overview
14
Front
page 17
Protective cover
for the voltage sensor input terminal,
BNC input terminal, and output terminal.
When not using
the instrument,
place the protective cover back in
place.
page 18
Protective cover
Operating keys
LCD display
Cover fastening method
when instrument in use
3144-20 NOISE SEARCH TESTER
1.3 Names and Functions of Parts
15
Chapter 1 Overview
Top
Input terminal for
external signals,
excluding signals
from the 9741.
Effective when the
instrument is not
connected to the
9741.
page 34
Output terminal for waveforms applied to the voltage
sensor input terminal or
BNC input terminal.
page 41
Connect the supplied 9741
CLAMP ON VOLTAGE
SENSOR here.
page 30
Switch to select the input
impedance of the BNC input
terminal.
(50 /1 M approx. 120 pF
page 34
Voltage sensor input terminal
BNC input terminal
Output terminalSelector switch
Bottom Surface
Plug the USB cable in
this terminal.
Rear Side
USB terminal
Battery cover
Setscrew
Chapter 1 Overview
16
Left Side
page 38
page 26
Right Side
Regulates the sound volume of the earphone.
Audible band monitoring
output terminal. Plug in the
earphone used to listen to
noise here.
page 40
Plug in the 9445-02 or 9445-03 AC
ADAPTER (supplied with the instrument) here.
Ground terminal for this instrument.
page 36
Protective cover
(when fastened)
Strap hole
POWER switch
Volume control knob
AC adapter connection terminal
Ground terminal
Earphone terminal
17
Chapter 1 Overview
Frequency range
indication
Display Section
Scale indication
[In decibels (dBV)]
Indication of Memory Blocks
Remains on when the
PEAK HOLD function is
ON.
Indication of
measuring
range
Indicates the frequency
range at peak detection, with
the PEAK HOLD function
ON.
Level meter (indicates for
each frequency range in 12
steps).
Indicates when noise is detected.
Indicates the date and time,
with the PEAK HOLD function OFF.
Indicates the peak detection
time, with the PEAK HOLD
function ON.
Battery mark
(Lights when the supply voltage drops below 6.5 V.)
Indication of recording time
interval
MONI: Remains on during
monitoring.
REC: Remains on during
recording.
VIEW: Remains on during
display of recorded
data.
Blocks (Storage units of recorded
data)
One block can hold up to 8,000
items of data.
Indicates the delimiter of files, with
each file covering the start to the
end of a recording. A file consists
of one to eight blocks, depending
on the number of data items recorded.
Empty blocks
Blocks occupied
by files
Indication of Memory Blocks
Chapter 1 Overview
18
Operation Keys
Key
Press for 1 sec.
RANGE key
key
PEAK HOLD
key
MEM.BLOCK
key
(The functions of keys vary, depending on
the settings made.)
Selects the measuring range (on the
monitoring screen [MONI] with the
PEAK HOLD function OFF.)
Selects the frequency range corresponding to the peak detection time to
be indicated (with the PEAK HOLD
function ON).
Scrolls recorded data (on the data view
screen [VIEW]).
Sets the date and time (in date and
time setup). (Values DOWN)
Sets the PEAK HOLD function on and
off (on the monitoring screen [MONI] or
recording screen [REC]).
Each pressing of this key shifts flashing to the setting position in order of
Year Month Day Hour
Minute Second (in date and time
setup).
Explanation
Defines the settings of date and time.
Selects the memory block (on the data
view screen [VIEW]).
19
DATE/TIME
key
DATE/TIME
key
Press for 1
sec.
key
REC key
Press for 1
sec.
Chapter 1 Overview
Switches the current indication to a
date or time (on the monitoring screen
[MONI] with the PEAK HOLD function
OFF).
Enables date and time setup.
Selects the frequency range corresponding to the peak detection time to
be indicated (with the PEAK HOLD
function ON).
Scrolls recorded data (on the data view
screen [VIEW]).
Sets the date and time (in date and
time setup). (Values UP)
Starts or stops recording.
(Starts on the monitoring screen [MONI]).
(Stops on the recording screen [REC]).
REC INTERVAL key
OVERWRITE ON/
OFF key
Press for 1
sec.
Sets the recording interval (on the
monitoring screen [MONI]).
Switches between Automatic Stopping
Mode and Overwrite Recording Mode
for recording (on the monitoring screen
[MONI]).
Deletes all recorded data
(on the monitoring screen
[MONI] or data view screen
[VIEW]). (When pressed for
1 sec.)
Switches between monitoring screen [MONI] and data
view screen [VIEW] (when
pressed simultaneously).
Chapter 1 Overview
20
9741 CLAMP ON VOLTAGE SENSOR
Clamp section
Connector
Lever
page 36
page 30
page 32
Pressing the lever
opens the clamp
section.
Ground terminal
21
Date indication
Time indication
DATE
TIME
To cancel: Press any key
other than the above.
Press for
1 sec.
Value setting
DOWN UP
Shifts to setting position
(Year
Month Day
Hour Minute
Second)
End of setup.
The setting position
flashes.
Set the value
at the flashing
position.
Each pressing of the
key changes the indication.
Chapter 1 Overview
1.4 Quick Reference
[MONI]: Monitoring screen/ [REC]: Recording screen/
[VIEW]: Data view screen
Measuring Range
(On [MONI] with the PEAK HOLD function OFF)
Switching of
range
Date and Time Indication
(On [MONI] with the PEAK HOLD function OFF)
Switching of
indication
Change of
settings
Recording Interval
(On [MONI])
Change of
settings
Chapter 1 Overview
22
CONT
Lights.
When memory becomes full, new data is
written over old data to
continue recording.
Press for
1 sec.
remains on.)
(CONT
Goes off.
When memory becomes full, recording
stops automatically.
Press for
1 sec.
CONT
REC
MONI
Recording is started.
Recording is stopped.
Lights.
Lights.
Press for
1 sec.
Press for 1 sec simultaneously.
All recorded data is
deleted.
Data Saving Method (On [MONI])
Save by
overwriting
Save without
overwriting
Start and Stop of Measurement
(Start on [MONI], Stop on [REC])
Start and
stop of measurement
Data deletion (On [MONI] or [VIEW])
Deletion
(Batch dele-
tion)
23
Chapter 1 Overview
Lights.
Shifts to
the left.
Shifts to
the right.
Indicates the peak value of
the range in which is
lighting, and the detection
time.
Goes off.
Press simultaneously
MONI
VIEW
Lights.
Lights.
Monitoring screen [MONI]
Data view screen [VIEW]
Allows monitoring recorded data.
Each pressing of the key
switches the
blocks.
123
Back
Forward
Peak Value Indication (PEAK HOLD function)
(On [MONI] or [REC])
Activating
the PEAK
HOLD function
Selecting the
frequency
range to be
indicated
(Effective only
with PEAK
HOLD ON)
Deactivating
the function
Switching of Screens
Switching
between
monitoring
screen
[MONI] and
data view
screen
[VIEW]
Viewing of Recorded Data (On [VIEW])
Selecting the
memory
block
Scrolling the
data
Chapter 1 Overview
24
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