MR8740T
HIOKI MR8740C963-05
MR8740-50
Quick Start Manual
MEMORY HiCORDER
Be sure to read this manual before using the instrument.
When using the instrument for
the rst time
Name and Function of
Each Part
Measurement Method
Oct. 2021 Revised edition 5
MR8740C963-05 21-10H
Troubleshooting
Maintenance and Service
p. 24
Troubleshooting
p. 69 Message
p. 6
p. 149
p. 151
p. 154
EN
*600530255*
HIOKI MR8740C963-05
FAQs
HIOKI MR8740C963-05
To set the measurement range automatically
Refer to “3.7 Measuring Signals With the Auto-range Setting” (p. 80).
To change the measurement range
Refer to “Analog channel” (p. 73).
To add a comment to the data
Refer to “Analog channel” (p. 73).
To minimize inuence of noise (Low-pass lter, LPF)
Refer to “Analog channel” (p. 73).
To change the sampling rate
Refer to “3.2 Setting Measurement Conditions” (p. 70).
To congure the trigger settings
Refer to “3.4 Conguring the Level Trigger Settings” (p. 75).
To scroll through the waveform display
Refer to “4.2 Handling Waveforms” (p. 85).
To read measured values (cursor values) with cursors
Refer to “4.1 Reading Measured Values (Trace Cursors)” (p. 83).
To save data les
Refer to “3.6 Saving Data Consisting of Items Selected” (p. 78).
To estimate le size
Refer to “13.1 Information for Reference Purposes” of Instruction Manual.
To open data les with a computer
Refer to “4.3 Loading Data With Your Computer (Wave Viewer)” (p. 86).
MR8740C963-05
Measurement Procedure
HIOKI MR8740C963-05
The basic measurement procedure is as follows. For advanced use, refer to the Instruction Manual
(PDF) in the accompanying CD.
Preparing for measurement
Inspecting the instrument before measurement
Conguring the basic settings for measurement
Choose a sampling rate.
Choose a recording length (shot).
Conguring the input channel settings
Congure the analog channel settings.
(p. 35)
(p. 69)
(p. 70)
(p. 72)
Conguring the trigger settings
Congure the trigger settings.
Starting/Stopping measurement
Saving measured data les
Analyzing waveforms
Scroll through, zoom in, and zoom out waveforms.
Read measured values (with the trace cursors).
Finishing the measurement
(p. 75)
(p. 77)
(p. 78)
(p. 83)
Contents
HIOKI MR8740C963-05
Introduction
Symbols and abbreviations
Conrming Package Contents
Safety Information
Operation Precautions
How to Refer to This Document
........................................................1
.............................2
........................4
............................................6
.....................................8
...................21
1 Overview 23
1.1 Product Overview and Features
1.2 Name and Function of Each Part
1.3 Screen
Screen conguration
Explanation of each screen
1.4 Basic Operation
Mouse operation
Changing screens and settings
Help Function
(Displaying Instruction Manual)
....................................................28
.................................28
.......................29
....................................31
.......................................31
.........23
.......24
.................32
.................34
2 Preparing for
Measurement
35
Turning o the instrument
2.7 Setting the Clock
..........................64
..................................65
2.8 Regulating the Zero Position
(Zero-Adjustment)
................................66
2.9 Executing Calibration
(For the Instrument With Model
MR8990 Installed)
................................68
3 Measurement Method 69
3.1 Inspection Before Measurement
3.2 Setting Measurement Conditions
Sampling rate setting guideline
3.3 Conguring the Input Channel
Settings
Analog channel
..................................................72
.........................................73
3.4 Conguring the Level Trigger
Settings
..................................................75
3.5 Starting/Stopping Measurement
3.6 Saving Data Consisting of Items
Selected
.................................................78
3.7 Measuring Signals With the Autorange Setting
.........................................80
........69
.......70
..................71
.........77
2.1 Installing and Removing Modules
Allocation of modules and channels
2.2 Attaching Connection Cords
Connection cables
(For measuring voltage, frequency,
or rotation speed, and obtaining
accumulations)
Thermocouple (Temperature)
Strain gauge transducer
Current sensor
Acceleration sensor
Logic probe (Measuring logic signals)
Connection cable
(For precisely measuring voltage)
Outputting waveforms
Outputting pulse waveforms
Outputting voltage, current, and
resistance
Connection cable (high voltage)
.........................................40
............................43
..........................................45
..................................49
...............................52
......................53
.................................................54
...........37
...............38
....................42
........51
..............51
................55
2.3 Connecting the External Control
Terminals
...............................................56
2.4 Connecting the Instrument with
computers
..............................................58
2.5 Preparing Storage Devices
(Recording Media)
USB ash drive
Built-in drive
Removing storage devices
Formatting storage devices
..............................................60
................................60
.........................................60
........................61
.......................62
2.6 Supplying Power to the Instrument
Turning on the instrument
.........................63
......36
....63
4 Analysis Method 83
4.1 Reading Measured Values
(Trace Cursors)
4.2 Handling Waveforms
Scrolling through waveforms
Zooming in and out waveforms
.....................................83
............................85
.....................85
..................85
4.3 Loading Data With Your Computer
(Wave Viewer)
.......................................86
5 Specications 89
5.1 Specications of Model MR8740T
General specications
Trigger
......................................................94
Waveform screen
Setting screen
File
...........................................................99
Performing calculation
Memory division
Waveform search
Others
....................................................101
..........................................97
...............................89
......................................96
.............................100
......................................101
....................................101
5.2 Specications of the Options
Model 8966 Analog Unit
Model 8967 Temp Unit
Model 8968 High Resolution Unit
Model U8969 Strain Unit
Model 8970 Freq Unit
Model 8971 Current Unit
..........................103
............................105
.........................109
............................. 111
......................... 113
.....89
............103
............107
i
Contents
HIOKI MR8740C963-05
Model 8972 DC/RMS Unit
Model 8973 Logic Unit
Model MR8990 Digital Voltmeter Unit
Model U8974 High Voltage Unit
Model U8975 4ch Analog Unit
Model U8977 3CH Current Unit
Model U8978 4CH Analog Unit
Model U8979 Charge Unit
Model U8991 Digital Voltmeter Unit
Model MR8790 Waveform Generator
Unit
........................................................134
Model MR8791 Pulse Generator Unit
Model U8793 Arbitrary Waveform
Generator Unit
Model U8794 VIR Generator Unit
........................................139
....................... 115
............................117
.................122
................127
.......................129
6 Maintenance and
Service
6.1 Troubleshooting
Before sending the instrument for repair
6.2 Initializing the Instrument
6.3 Message
Error messages
Warning messages
6.4 Self-check
Memory check
LAN check
Media check
System conguration check
6.5 Cleaning the Instrument
6.6 Disposing of the Instrument
(Removing the lithium battery)
149
..................................151
...................153
..............................................154
......................................155
.................................156
............................................160
........................................160
..............................................161
...........................................163
.....................164
....................165
......118
...............120
...............124
.........132
......136
............143
..151
..........165
7 Appendix 167
7.1 Mounting the instrument in a rack
Rack-mount brackets
How to secure the rack-mount brackets
Index 169
Warranty Certicate
ii
....167
..............................167
...168
Introduction
HIOKI MR8740C963-05
Thank you for choosing the Hioki MR8740T Memory HiCorder (Model MR8740-50). Preserve this
manual carefully and keep it handy to make full use of this instrument for a long time.
Following manuals are provided along with these models. Refer to manuals relevant to your
purpose.
Type Contents Printed PDF
Operating Precautions Information on the instrument for safe operation
Introduction
–
Quick Start Manual
(This document)
Instruction Manual Functions and instructions for the instrument –
Instruction Manual
U8793, MR8790, MR8791
Basic instructions and specications of the instrument
Functions, specications, and instructions for the
U8793, MR8790, and MR8791
–
Latest instruction manual
The contents of this manual are subject to change, for example as a result of
product improvements or changes to specications.
The latest edition can be downloaded from Hioki’s website.
https://www.hioki.com/global/support/download
Target audience
This manual has been written for use by individuals who use the product in question or who teach
others to do so.
It is assumed that the reader possesses basic electrical knowledge (equivalent to that of someone
who graduated from the electrical program at a technical high school).
Trademarks
• Microsoft and Internet Explorer are either registered trademarks or trademarks of Microsoft
Corporation in the United States and other countries.
• Other products and company names are trade names, registered trademarks, or trademarks of
their respective owners.
–
1
Symbols and abbreviations
HIOKI MR8740C963-05
Symbols and abbreviations
Safety notations
In this document, the risk seriousness and the hazard levels are classied as follows.
DANGER
WARNING
CAUTION
IMPORTANT
Indicates an imminently hazardous situation that will result in death or serious
injury to the operator.
Indicates a potentially hazardous situation that may result in death or serious
injury to the operator.
Indicates a potentially hazardous situation that may result in minor or moderate
injury to the operator or damage to the instrument or malfunction.
Indicates information related to the operation of the instrument or maintenance
tasks with which the operators must be fully familiar.
Indicates a high voltage hazard.
If a particular safety check is not performed or the instrument is mishandled,
this may give rise to a hazardous situation; the operator may receive an electric
shock, may get burnt or may even be fatally injured.
Indicates prohibited action.
Indicates the action which must be performed.
Symbols axed to the instrument
Indicates cautions and hazards. When the symbol appears on the instrument, read the
corresponding topic in the Instruction Manual.
Indicates the power button that switches the instrument between on and o states.
Indicates a grounding terminal.
Indicates DC (direct current).
Indicates AC (alternating current).
Symbols for Standards
Indicates the Waste Electrical and Electronic Equipment Directive (WEEE Directive) in EU
member states.
Indicates that the product conforms to regulations set out by the EU Directive.
2
Others
HIOKI MR8740C963-05
Symbols and abbreviations
*
(p. ) Indicates the location of reference information.
START
(Bold-faced)
[ ]
Windows
Current sensor Sensors measuring current are referred to as “current sensor.”
S/s
Additional information is presented below.
Indicates the initial setting values of the items. Initializing the instrument restores
settings to each of these values.
Names and keys on the screen are indicated in boldface.
Menus, dialog boxes, buttons in a dialog box, and other names on the screen are
indicated in brackets ([ ]).
Unless otherwise specied, “Windows” represents Windows 7, Windows 8, and
Windows 10.
The number of times per second the analog input signals are digitized by the
instrument is represented in “samples per second (S/s).”
Example: “20 MS/s” (20 megasamples per second) indicates that the signal is digitized
20 × 106 times per second.
Notations
We dene measurement tolerances in terms of f.s. (full scale) and rdg. (reading) values, with the
following meanings:
f.s.
rdg.
setting
(maximum display value or scale length)
The maximum displayable value or scale length.
(displayed value)
The value currently being measured and displayed on the measuring instrument.
(setting value)
Indicates the value set as the output voltage, current, or other quantity.
3
Conrming Package Contents
HIOKI MR8740C963-05
Conrming Package Contents
When you open the package, inspect the instrument carefully to ensure that everything is in good
condition, and that no damage occurred during shipping. Carefully check the accessories, panel
keys and switches, and connectors. If the instrument seems to have been damaged or does not
work as specied, contact your authorized Hioki distributor or reseller.
Check that the package contents are correct.
Instrument
Model MR8740T Memory HiCorder
Accessories
Power cord
Operating Precautions (0990A903)
Quick Start Manual (This document)
Instruction Manual CD*
• Instruction Manual
MR8740C964-xx.pdf
Application disc*
(p. 63)
1
(p. 34)
1
(p. 86)
*1: The latest version can be downloaded from our website.
4
Blank panel (for slots with no module installed)
Rack-mount brackets
(p. 36)
(p. 167)
Conrming Package Contents
HIOKI MR8740C963-05
Options (sold separately)
The options listed below are available for the instrument. To order an option, please contact your
authorized Hioki distributor or reseller. Options are subject to change. Please check Hioki’s website for the
latest information.
For information about products, including cables, probes, and sensors, that can be connected to optional
modules, see the “Options” row of each module’s specications in “5.2 Specications of the Options”
(p. 103).
Input modules
Model 8966 Analog Unit
Model 8967 Temp Unit
Model 8968 High Resolution Unit
Model U8969 Strain Unit
Model 8970 Freq Unit
Model 8971 Current Unit
Model 8972 DC/RMS Unit
Model 8973 Logic Unit
Model U8974 High Voltage Unit
Model U8975 4ch Analog Unit
Model U8977 3CH Current Unit
Model U8978 4CH Analog Unit
Model U8979 Charge Unit
Model MR8990 Digital Voltmeter Unit
Model U8991 Digital Voltmeter Unit
Output modules
Model MR8790 Waveform Generator Unit
Model MR8791 Pulse Generator Unit
Model U8793 Arbitrary Waveform Generator Unit
Model U8794 VIR Generator Unit
USB ash drive
Model Z4006 USB Drive (16 GB)
LAN cable
Model 9642 LAN Cable
Other
Model 9335 Wave Processor
5
Safety Information
HIOKI MR8740C963-05
Safety Information
This instrument and modules are designed to conform to IEC 61010 Safety Standards, and has
been thoroughly tested for safety prior to shipment. However, using the instrument in a way not
described in this manual may negate the provided safety features.
Read the following safety notes carefully before using the instrument.
DANGER
Mishandling the instrument could result in bodily injury or even death, as well
as damage to the instrument. Familiarize yourself with the instructions and
precautions in this manual before using the instrument.
WARNING
Electricity can cause potentially serious events such as an electric shock,
heat generation, re, and an arc ash due to a short-circuit. If you have not
used electrical measuring instruments before, you should be supervised by a
technician who has experience in electrical measurement.
Protective gear
Performing measurement using this instrument involves live-line work. To
prevent an electric shock, use appropriate protective insulation and adhere to
applicable laws and regulations.
WARNING
6
Safety Information
HIOKI MR8740C963-05
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.
DANGER
• 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.
• Never use a measuring instrument that lacks category labeling in a CAT II to
CAT IV measurement environment. Doing so could result in a serious accident.
CAT II: 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.).
CAT III: When measuring the primary electrical circuits of heavy equipment (xed installations)
connected directly to the distribution panel, and feeders from the distribution panel to
outlets.
CAT IV: When measuring the circuit from the service drop to the service entrance, and to the
power meter and primary overcurrent protection device (distribution panel).
Distribution Panel
Service Entrance
Service Drop
CAT IV
Power Meter
Fixed Installation
Internal Wiring
CAT III
CAT II
T
Outlet
The applicable measurement category is determined based on the module being used.
Refer to “Handling the instrument and modules” (p. 10).
7
Operation Precautions
HIOKI MR8740C963-05
Operation Precautions
Follow these precautions to ensure safe operation and to obtain the full benets of the various
functions.
Checks before Use
DANGER
If the connection cords or the instrument is damaged, there is a risk of an electric
shock. Perform the following inspection before using the instrument:
• Check that the insulation of the connection cords are neither ripped nor torn
and that no metal parts are exposed before using the instrument. Using the
instrument under such conditions could result in an electric shock. Replace the
connection cords with those specied by our company.
• Check if there is any damage to the instrument occurred during storage or
shipping and verify that it operates normally before using the instrument. If you
nd any damage, contact your authorized Hioki distributor or reseller.
Installing the instrument and modules
Installing the instrument in inappropriate locations could cause a malfunction of
the instrument an accident, or re. Avoid the locations that are:
• Exposed to direct sunlight or high temperatures
• Exposed to corrosive or combustible gases
• Exposed to strong electromagnetic elds or electrostatic charges
• Near induction heating systems (such as high-frequency induction heating
systems and IH cooking equipment)
• Susceptible to vibration
• Exposed to water, oil, chemicals, or solvents
• Exposed to high humidity or condensation
• Exposed to high quantities of dust particles
• 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.
• Use M4 × 8 mm screws to x the rack-mount brackets on the MR8740-50.
Using a screw longer than 8 mm can cause damage to the inside of the instrument
or an electric shock.
WARNING
8
Operation Precautions
HIOKI MR8740C963-05
CAUTION
Failure to observe the following precaution may result in bodily injury.
• The instrument weighs about 14 kg (20.8 kg with modules installed in all slots). It
should be moved by at least two people.
• The instrument is heavy. When transporting it, follow your company’s workplace safety
standards to assure safety (for example, by wearing non-slip gloves and protective
footwear).
5 cm or wider
• Do not place the instrument on an unstable table.
• Do not place the instrument on an inclined
surface.
• Do not stack the multiple instruments.
• Vents must not be blocked.
• To prevent overheating, be sure to leave 5 cm
(2 inches) around the instrument.
• The instrument should be operated only with the
bottom side downwards.
9
Operation Precautions
HIOKI MR8740C963-05
Handling the instrument and modules
• Do not use the modules or the cables to measure circuits that exceed those
ratings or specications. Damage to the instrument or overheating can cause
bodily injury.
• The maximum input voltage and maximum rated voltage to earth of the modules
and connection cords are shown in the following table. To avoid an electric
shock and damage to the instrument, ensure that input voltage never exceeds
these limits. The lower maximum input voltage of the module or connection
cord must be used. Measuring a voltage exceeding this value can cause
damage to the instrument, resulting in bodily injury. The same applies to the
maximum rated voltage to earth using an input attenuator for the measurement.
Ensure that the connection does not allow the input voltage to exceed the
maximum rated voltage to earth.
Refer to
Rating of input modules
“5.2 Specications of the Options” (p. 103).
DANGER
Modules Maximum input voltage
Model 8966 Analog Unit
Model 8967 Temp Unit – 300 V AC/DC (CAT II)
Model 8968 High Resolution Unit
Model U8969 Strain Unit – 30 V rms / 60 V DC
Model 8970 Freq Unit
Model 8971 Current Unit – Non-isolated
Model 8972 DC/RMS Unit
Model 8973 Logic Unit – Non-isolated
Model U8974 High Voltage Unit
Model U8975 4ch Analog Unit
Model U8977 3CH Current Unit – Non-isolated
Model U8978 4CH Analog Unit
400 V DC 300 V AC/DC (CAT II)
400 V DC 300 V AC/DC (CAT II)
400 V DC 300 V AC/DC (CAT II)
400 V DC 300 V AC/DC (CAT II)
1000 V DC
700 V AC
200 V DC 300 V AC/DC (CAT II)
40 V DC (Direct input)
400 V DC (with Model 9665
10:1 Probe used)
Maximum rated voltage to
earth
1000 V AC/DC (CAT III)
600 V AC/DC (CAT IV)
30 V AC, 60 V DC
(Direct input)
300 V AC/DC (CAT II)
(with Model 9665 10:1
Probe used)
10
Model U8979 Charge Unit
Model
MR8990
Model U8991 Digital Voltmeter Unit
Digital Voltmeter Unit
ModulesModel MR8740T
High
Low
40 V DC
500 V DC 300 V AC/DC (CAT II)
100 V DC 100 V AC/DC
Maximum input voltage
30 V AC
60 V DC
Maximum rated voltage
to earth
Rating of generator modules
HIOKI MR8740C963-05
You can mixedly install generator modules and measurement modules in the instrument.
Operation Precautions
Intended use Model name Number of
For generating sine
wave and DC
For generating pulse
For generating
arbitrary waveforms
For generating DC
voltage, DC current,
and resistance
generation
Model MR8790
Waveform Generator
Unit
Model MR8791
Pulse Generator Unit
Model U8793
Arbitrary Waveform
Generator Unit
Model U8794
VIR Generator Unit
Ratings of connection cords
Connection Cord
Model L9197
Connection Cord
Model L9198
Connection Cord
(for measuring low-voltage)
Model L9217
Connection Cord
Model L9790
Connection Cord
Model 9322
Dierential Probe
Model L4940
Connection Cord
*: When Model U8974 High Voltage Unit is used
Maximum
input voltage
600 V AC/DC
300 V AC/DC
600 V AC/DC
2000 V DC
1000 V AC
1000 V DC*
Maximum output
channels
4 20 kHz −10 V to 10 V
8 20 kHz
2 100 kHz −10 V to 15 V
8
Maximum rated voltage to earth
600 V AC/DC (CAT III)
300 V AC/DC (CAT IV)
600 V AC/DC (CAT II)
300 V AC/DC (CAT III)
• With Model L9790-01 Alligator Clip or
Model 9790-03 Contact Pin attached
600 V AC/DC (CAT II)
300 V AC/DC (CAT III)
• With Model 9790-02 Grabber Clip
attached
300 V AC/DC (CAT II)
150 V AC/DC (CAT III)
• With grabber clips attached
1000 V AC/DC (CAT II)
• With alligator clips attached
1000 V AC/DC (CAT II)
600 V AC/DC (CAT III)
• With Model L4935 Alligator Clip Set or
Model L4932 Test Pin Set attached
600 V AC/DC (CAT IV)
1000 V AC/DC (CAT III, CAT II)
• With Model L9243 Grabber Clip attached
1000 V AC (CAT II)
• With Model L4936 Bus Bar Clip Set
attached
600 V AC/DC (CAT III)
• With Model L4937 Magnetic Adapter Set
attached
1000 V AC/DC (CAT III)
• With Model L4934 Small Alligator Clip
Set attached
300 V AC/DC (CAT III)
600 V AC/DC (CAT II)
frequency
Output voltage
TTL level
(amplitude: 0 to 5 V)
Open-collector output
Voltage: −0.1 V to 5.3 V
Current: −5 mA to 5 mA
Resistance: 10 Ω to 1 M
Maximum rated
1 A
0.2 A
1 A
10 A
1 A
5 A
2 A
3 A
Ω
current
–
11
Operation Precautions
HIOKI MR8740C963-05
Connection Cord
Model P9000-01
Dierential Probe
Model P9000-02
Dierential Probe
Model 9166
Connection Cord
Model L9795-01
Connection Cable
(for generating)
Model L9795-02
Connection Cable
(for generating)
It is recommended to measure the secondary side of a distribution panel with
the U8974 High Voltage Unit. Do not measure the primary side of the distribution
panel because an unrestricted current ow could damage the instrument and
facilities if a short circuit occurs.
• Each channel of Model U8979 Charge Unit has the BNC terminal and miniature
connector terminal with the common ground. Do not connect cables with each
of the terminals simultaneously to avoid a short-circuit.
Maximum
input voltage
1000 V AC/DC 1000 V AC/DC (CAT III) –
30 V AC
60 V DC
±30 V 30 V rms AC, 42.4 V peak AC, or 60 V DC –
Maximum rated voltage to earth
For inputting voltage into Model U8979 –
Maximum rated
current
DANGER
WARNING
• To avoid an electric shock and damage to the module and the instrument,
conrm that the instrument is turned o and that the connection cords are
disconnected before removing or replacing a module.
• To avoid an electric shock, install a blank panel over any slot with a module
removed.
• To prevent the instrument damage or an electric shock, use only the screws that
are originally installed for securing the module in place. If you have lost any
screws or nd that any screws are damaged, please contact your authorized
Hioki distributor or reseller.
12
Operation Precautions
HIOKI MR8740C963-05
CAUTION
• Do not touch module connectors inserted to the instrument to avoid damaging a
module.
• To avoid damage to the instrument, do not unplug the power cable from the
instrument when operations are in progress. Be sure to use the power key to turn o
the instrument.
• The U8794 permits a load resistance of 1 kΩ or more while outputting a voltage. Do
not connect a load resistance lower than the permissible value or short-circuit an
output terminal. Damage to the instrument could result.
• Do not set the OUTPUT terminal status of the U8794 to SHORT when a power supply
unit connects with the OUTPUT terminal. A short-circuit current will ow, resulting in
damage to the instrument or power supply device.
• Do not connect anything with the U8794 OUTPUT terminal during a general test
of the self-diagnosis function and an oset measurement of the oset canceling
function. When the connected target is a power supply device, the instrument and the
connected target can be damaged because the OUTPUT terminals of each channel
are momently short-circuited.
• The mounting screws must be rmly tightened or the module may not work as
specied, or may even fail.
• When you use the U8794 resistance generation function to presume a characteristic
of a connected target with an output resistance of less than 1 kΩ, a current that
exceeds the specication will ow, resulting in damage to the instrument and the
connected target.
• Model U8979 Charge Unit has two miniature connectors with the maximum input
charge of ±500 pC (for six higher-sensitivity range) or ±50,000 pC (for six lowersensitivity range). Inputting a charge that exceeds these value causes damage to the
instrument.
• Use an acceleration sensor with a built-in pre-amplier that conforms to the
specication of Model U8979 (3.5 mA, 22 V). Using a inapplicable sensor may cause
damaging itself.
IMPORTANT
• Install a blank panel over the slot with no module installed. If the measurement is performed
without the blank panel installed, the instrument may not work as specied because of
temperature instability within the modules.
• If any unexpected waveform is observed or a module is not recognized, send the instrument for
repair.
• Disconnect all cables and remove a USB ash drive before carrying the instrument.
• Waveforms can frequently uctuate even when no voltage is applied due to an induction voltage.
This, however, is not a malfunction.
• 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.
Precautions during shipment
To avoid damage to the instrument, protect it from physical shock when transporting
and handling. Be especially careful to avoid physical shock due to dropping it.
• Store the packaging materials even after unpacking, because you will need them when you
transport the instrument.
CAUTION
13
Operation Precautions
HIOKI MR8740C963-05
• To ensure safe handling, when transporting the instrument, please use the original box and
packing materials,
but do not use if the box is damaged or warped, or if the packing materials are in poor condition
or incomplete.
If you nd any damage, contact your authorized Hioki distributor or reseller.
• When packing the instrument, make sure to disconnect the test leads and power supply cords
from the main device.
• When transporting, avoid dropping or other excessive impact.
CD precautions
• Exercise care to keep the recorded side of discs free of dirt and scratches. When writing text on a
disc’s label, use a pen or marker with a soft tip.
• Keep discs inside a protective case and do not expose to direct sunlight, high temperature, or
high humidity.
• Hioki is not liable for any issues your computer system experiences in the course of using this
disc.
14
Handling storage devices
HIOKI MR8740C963-05
• Do not carry the instrument with a USB ash drive inserted. Damage could result.
•
Do not subject the instrument to extreme shock or vibration. Shock can cause damage to
the built-in SSD unit.
• Do not insert a storage device upside down, backward, or in the wrong direction.
Doing so may damage the storage device or instrument.
Exercise care when using such products because static electricity could damage the
external storage device or cause a malfunction of the instrument.
IMPORTANT
• Do not extract any external storage device or turn o the instrument while the instrument is
accessing the storage device (while the green DIAG LED is lighting up). Data stored in the
device could be lost.
• No compensation is available for loss of data stored on the external storage device (USB ash
drive) or the built-in SSD unit of the instrument, regardless of the content or cause of damage
or loss. Be sure to back up any important data stored on the device (USB ash drive) and the
built-in SSD unit of the instrument.
• When the instrument is left powered o for a long period of time (about 1 year or more), the
data saved to the built-in SSD may be lost. Be sure to back up the data if the instrument is to
be left powered o for a long time.
Operation Precautions
CAUTION
• With some external storage device, the instrument may not start up if power is turned on while
the device is inserted. In such a case, turn o and cycle the instrument.
• The instrument supports not all commercially available USB ash drives.
• The number of times data can be written on external storage devices (USB ash drive) and the
built-in SSD unit of the instrument is limited by their ash memory. If data has been rewritten
many times, data reading and writing capabilities will be degraded. In that case, replace the
device.
• Model Z4006 USB Drive can be used to save data. Use the product available as Hioki’s option
only. (p. 5)
15
Operation Precautions
HIOKI MR8740C963-05
Built-in battery
The instrument contains a battery (sealed lead acid battery) to shut down Windows® in case power
is cut (power outrage or turning o a breaker). Since the battery has a limited life expectancy,
it must regularly be replaced. When replacing batteries, please contact your authorized Hioki
distributor or reseller.
Expected lifetime: About 2 years (Operated at an ambient temperature of
25°, when the instrument is turned o once a day)
About 4 years (Operated at an ambient temperature of
25°, when the instrument is turned o ve times a year)
CAUTION
• You have to charge the battery periodically even if you do not use the instrument.
Periodically charge the battery every three months at a storage temperature of 35°C;
every six months at a storage temperature of 25°C. Failure to do so may reduce the
battery life expectancy.
• Do not install the instrument in a sealed space or near a re. Doing so may cause an
explosion or re.
• Do not use the instrument at high ambient temperature. Do not use the instrument
with the end-of-life battery. Doing so may cause electrolyte leakage, resulting in a bad
inuence that includes a re at a worst. Make sure that you use the instrument within
the operating temperature range and inspect and replace the battery periodically.
16
Operation Precautions
HIOKI MR8740C963-05
Before connecting cords
For detailed precautions and instructions on connections, refer to the instruction manuals of your
connection cords.
DANGER
• If the insulation on a connecting cable melts, the metal conductor may be
exposed. Do not use any cable whose metal conductor is exposed. Doing so
could result in an electric shock, burn, or other hazards.
When measuring power line voltage
• Only connect connection cords on the secondary side of a distribution panel. If
a short-circuit occurs on the secondary side of the distribution panel, the panel
will interrupt the short-circuit current. Do not connect the connection cords on
the primary side of the distribution panel because an unrestricted current ow
can damage the connection cords and facilities if a short-circuit occurs.
• To prevent an electrical shock and bodily injury, do not touch any input
terminals on the VT (PT), CT or the instrument when they are in operation.
• Do not leave the measurement cables connected to the instrument in an
environment where voltage may surge beyond the maximum input voltage.
Applying voltage may result in damage to the instrument, or serious accidents.
• Do not cause a short-circuit between another wire and the wire to be measured
with the metal tip of the connection cord. Arcs or such grave accidents are
likely to occur.
• To avoid a short-circuit or electric shock, do not touch the metal tip of the
connection cord.
WARNING
• To prevent an electric shock, conrm that the white or red portion (insulation
layer) inside the cable is not exposed. If a color inside the cable is exposed, do
not use the cable.
• Do not place a cable in contact with the lines to be measured. Any contact
can cause the instrument to malfunction and lead to a short-circuit or electric
shock, resulting in bodily injury.
• Be sure to connect the voltage input and current input terminals correctly.
incorrect connection could damage or a short-circuit.
• Use only the specied connection cords. Using a non-specied cable may
result in unsafe measurements. Using a non-specied cable may also result in
incorrect measurements due to poor connection or other reasons.
• To avoid electric shock, do not exceed the lower of the ratings shown on the
modules and connection cords.
An
17
Operation Precautions
HIOKI MR8740C963-05
• To prevent cord damage, do not step on cords or pinch them between other objects.
• The cable is hardened in freezing temperatures. Do not bend or pull it to avoid tearing
• Do not use any cable terminated with a metal BNC connector for connecting cables
CAUTION
Do not bend or pull on cords at their base.
its shield or cutting the cable.
to the BNC jacks on modules. If you connect a metal BNC cable to insulated BNC
connector, the insulated BNC connector and instrument may be damaged.
• To prevent damage to the BNC connector, be sure to release the
locking mechanism, grip the head of the connector (not the cord),
and pull it out.
Before connecting a logic probe to a measuring object
DANGER
To avoid an electric shock, a short-circuit and damage to the instrument, supply
power from a single main to the instrument and a measuring object with the
accompanying power cord.
The ground pin of logic terminal of Model 9320-01 Logic Probe (or Model 9327
Logic Probe) is not isolated from the instrument ground. The ground is shared.
If each of the terminals are supplied with power from separate mains or power
is supplied through a non-grounded power cord, the measuring object and the
instrument may be damaged because a current may ow through the logic probe
due to the resulting ground potential dierence between the terminals. The
following connection procedure is recommended to avoid this problem:
• Connect the power cord provided
to the instrument and supply
power from the same outlet as the
measuring object.
• Connect the ground of the
measuring object to the GND
terminal (functional earth terminal)
of the instrument.
(Always supply power from a single
main.)
Refer to “2.6 Supplying Power to
the Instrument” (p. 63).
Measuring
object
Measuring
object
GND
1
2
Model MR8740T
Logic
Probe
Model MR8740T
Logic
probe
18
Functional ground terminal
Before turning on the instrument
HIOKI MR8740C963-05
• To prevent electrical shock and to maintain the safety specications of this
instrument, connect the accompanying power cord only to an inlet.
• 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.
Do not operate the instrument on any of the power sources (UPS or uninterruptible
power supply, DC/AC inverter) that provide rectangular-wave or pseudo-sine-wave
power. Doing so may damage the instrument.
Operation Precautions
WARNING
CAUTION
19
Operation Precautions
HIOKI MR8740C963-05
Before connecting the instrument to external equipment
DANGER
To avoid electrical hazards and damage to the instrument, do not apply voltage
exceeding the rated maximum to the external control terminals.
Model MR8740T
I/O terminal Maximum input voltage
IN1
IN2 10 V DC
OUT1 50 V DC, 50 mA, 200 mW
OUT2 50 V DC, 50 mA, 200 mW
TRIG.OUT 50 V DC, 50 mA, 200 mW
Model U8793 Arbitrary Waveform Generator Unit
I/O terminal Maximum input voltage
IN −0.5 V to 7 V DC
OUT 30 V DC, 50 mA
10 V DC
WARNING
To avoid an electric shock or damage to the equipment, always observe the
following precautions when connecting your external equipment to external
control terminals.
• Always turn o the instrument and any equipment to be connected before
making connections.
• Be careful to avoid exceeding the ratings of the external control terminals.
• The external control terminal shares the ground with the chassis. As required,
isolate the devices and systems to be connected to the external control
terminals from one another.
Always turn both devices o before connecting and disconnecting an interface
connector. This may cause an electric shock.
I/O terminals Maximum input voltage
EXT.TRIG
EXT.SMPL 10 V DC
10 V DC
20
CAUTION
• Use a common ground to both the instrument and the connected equipment. Using
dierent ground circuits will result in a ground potential dierence between the
instrument and the connected equipment. If the cable is connected while such a
potential dierence exists, it may result in equipment malfunction or failure.
• Before connecting or disconnecting any cable, always turn o the instrument and your
device to be connected. Failure to do so could result in an equipment malfunction or
damage to the equipment.
• After inserting the connector, securely tighten the screws of the connector. Failure to
do so could result in an equipment malfunction or damage to the equipment.
• To prevent damage to the equipment, use the recommended type of wires to connect
your external equipment to the external control terminal, or otherwise ensure that the
wires have sucient withstand voltage and current capacity.
Refer to “2.3 Connecting the External Control Terminals” (p. 56).
How to Refer to This Document
HIOKI MR8740C963-05
How to open a screen
Indicates the order of clicking the
screens.
The button
setting key.
Procedure numbers
Numbered same as a
corresponding step-by-step
instruction.
Options and explanations
Describes selectable settings
when an item is clicked.
The icon indicates the default
setting of the item.
represents the
How to Refer to This Document
21
How to Refer to This Document
HIOKI MR8740C963-05
22
1
HIOKI MR8740C963-05
Overview
1.1 Product Overview and Features
This recorder allows you to observe a wide range of waveforms from low-speed signals to highspeed waveforms.
You can mainly use this instrument for analyzing test and evaluation results of various products and
troubleshooting those products.
Multichannel simultaneous sampling
This instrument can simultaneously measure signals
across up to 108 channels.
Extensive line of measurement modules
Many types of measurement modules let the
instrument measure a variety of signals that include
voltage, current, temperature, and frequency.
Overview
23
Name and Function of Each Part
HIOKI MR8740C963-05
1.2 Name and Function of Each Part
Front side
1
No. Name Function
Up to 27 modules can be installed in the instrument.
You can install as many modules of Model 8971 Current
Unit and Model U8977 3CH Current Unit as possible in any
Module embedding part
1
slots unless the total number of connectable current sensors
reaches nine. Model 8973 Logic Unit can be installed in slots
to which UNIT 25, UNIT 26, or UNIT 27 is assigned only.
Refer to an instruction manual that comes with each input
module.
2
3
4
5
6
Reference
page
p. 10
p. 36
USB2.0 connector Connect a USB ash drive, USB mouse, or USB keyboard.
2
Start button. Activates the instrument or puts it into standby when pressed.
3
POWER lamp
4
DIAG lamp Indicates instrument status.
5
Command error lamp Lights up if a command error occurs.
6
Indicates whether the instrument is powered on or in standby
mode.
p. 60
p. 26
24
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