Hioki LR8431-20 User manual

MEMORY HiLOGGER
Measurement Guide
LR8431-20
April 2013 Revised edition 2 LR8431B981-02 13-04H

Procedure
1
Procedure
Operation and Screen Types
(p.12) Describes the screen types and an overview of the
operating keys.
Measurement Procedure
(p.16) Describes procedures from measurement prepara-
tion to analysis.
Monitoring Voltage Fluctua-
tions (p.19)
This section describes voltage measurement using
an AC transducer* to acquire voltage fluctuation data
for one week, with the data automatically saved on a
CF card.
* The example transducer provides 0 - 10 V DC out-
put proportional to 0 - 150 Vrms AC input.
Monitoring Temperature
Changes (p.21)
This section describes temperature measurement
using a type K thermocouple to acquire temperature
data once per second, for monitoring temperature
changes. The post-measurement saving method is
also described.
Monitoring Energy Con-
sumption (p.24)
This section describes pulse measurement using a
watt-hour meter* to acquire integrated power con-
sumption data for one month.
* The example watt-hour meter provides an output of
50,000 pulses/kWh.
Analysis (p.26) View and calculate waveform measurement values
using the A/B cursors.

Introduction
2
Thank you for purchasing the HIOKI "Model LR8431-20 Memory HiLogger."
This Measurement Guide consists of some basic application examples. Before using
the instrument, be sure to read the Instruction Manual carefully.
About options: Contact your dealer or Hioki representative for details.
Introduction
Confirming Package Contents
When you receive the instrument, inspect it carefully to ensure that no damage
occurred during shipping. In particular, check the accessories, panel switches,
and connectors. If damage is evident, or if it fails to operate according to the
specifications, contact your dealer or Hioki representative.
Confirm that these contents are provided.
Model LR8431-20 ......................... 1
Memory HiLogger
Model Z1005 AC Adapter............1
with supplied power cord
Measurement Guide 
(This document) ..........................1
USB Cable....................................1
CD.................................................1
• Instruction Manual (PDF)
• Logger Utility Instruction Manual (PDF)
• Logger Utility (Data acquisition 
application program)
The latest version can be
downloaded from our web site.
Model 9780 Battery Pack
Model Z1005 AC Adapter
Model 9641 Connection Cable (for pulse inputs)
Model 9782 Carrying Case
Model 9812 Soft Case
Model 9727 PC Card (256MB)
Model 9728 PC Card (512MB)
Model 9729 PC Card (1GB)
Model 9830 PC Card (2GB)
Model 9809 Protection Sheet

Safety Information
3
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.
The following symbols in this manual indicate the relative importance of cautions
and warnings.
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. 
However, 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 precau-
tions in the manual before use. We disclaim any responsibil-
ity for accidents or injuries not resulting directly from
instrument defects.
Safety Symbols
In the manual, the symbol indicates particularly important information that the
user should read before using the instrument.
The symbol printed on the instrument indicates that the user should refer to a
corresponding topic in the manual (marked with the symbol) before using the
relevant function.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
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.

Safety Information
4
Accuracy
We define measurement tolerances in terms of f.s. (full scale), rdg. (reading) and
dgt. (digit) values, 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 cur-
rently selected range.
Example: For the 1 V range, f.s. = 1 V
rdg. (reading or displayed value)
The value currently being measured and indicated on the measuring instrument.
dgt. (resolution)
The smallest displayable unit on a digital measuring instrument, i.e., the input value
that causes the digital display to show a "1" as the least-significant digit.
Symbols for Various Standards
This symbol indicates that the product conforms to safety regulations set out
by the EC Directive.
This is a recycle mark established under the Resource Recycling Promotion
Law (only for Japan).
WEEE marking:
This symbol indicates that the electrical and electronic appliance is put on the
EU market after August 13, 2005, and producers of the Member States are
required to display it on the appliance under Article 11.2 of Directive 2002/96/
EC (WEEE).
Ni-MH
Other Symbols
Indicates the prohibited action.
(p. #) Indicates the location of reference information.
Indicates that descriptive information is provided below.
[ ] The names of setting objects and buttons on the screen are indicated
by square brackets [ ].
SET
(Bold characters) Bold characters within the text indicate operating key labels.
Unless otherwise specified, "Windows" represents Windows 2000, Windows XP, Win-
dows Vista, Windows 7 or Windows 8.
Click: Press and quickly release the left button of the mouse.
Double click: Quickly click the left button of the mouse twice.

Safety Information
5
Measurement categories
To ensure safe operation of measurement instruments, IEC 61010 establishes safety stan-
dards for various electrical environments, categorized as CAT II to CAT IV, and called mea-
surement categories.
Using a measurement instrument in an environment designated with a higher-numbered cat-
egory 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.
Difference between "Measurement" and "Recording"
The measurement and recordingprocesses are distinguished as follows for the purposes of
these instructions.
Measured data (data acquired in internal memory) is erased whenever a new measurement
starts. To retain data, always record (save) it.
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 entrance, and to the power
meter and primary overcurrent protection device (distribution panel).
Measurement: The acquisition of input values into internal HiLogger memory or to a PC
via communications.
Recording: Storing measurement data on a CF card, USB flash drive or on a PC via
data communication.

Operating Precautions
6
Follow these precautions to ensure safe operation and to obtain the full benefits of
the various functions.
• Before using the instrument for the first time, verify that it operates normally to
ensure that no damage occurred during storage or shippi ng. If you find any dam-
age, contact your dealer or Hioki representative.
• Before using the instrument, make sure that the insulation on the cables is undam-
aged 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 rep-
resentative for replacements.
• Operating temperature and humidity: 0 to 40°C at 80% RH or less (non-conden-
sating)
• Temperature and humidity range for guaranteed accuracy: 23±5°C, 80%RH or less
Operating Precautions
Before Use
Instrument Installation
Avoid the following locations that could cause an accident or damage to the
instrument. Exposed to direct sunlight
Exposed to high tempera-
ture In the presence of corrosive
or explosive gases
Exposed to water, oil, other
chemicals, or solvents
Exposed to high humidity or
condensation
Exposed to strong electro-
magnetic fields
Near electromagnetic radia-
tors
Exposed to high levels of
particulate dust Near induction heating sys-
tems
(e.g., high-frequency induc-
tion heating systems and IH
cooking utensils)
Subject to vibration
The maximum operating (ambient) temperature for the LR8431-20
is 40°C. Do not attempt to use in higher temperature environ-
ments.

Operating Precautions
7
Installation Precautions
• If the instrument is used in any state other than the following, the
measurement accuracy may not satisfy the device specifications.
•
• Leave sufficient space around the ventilation holes and install the
instrument with the holes unobstructed.
• Avoid temperature changes around the terminal block. Especially
avoid directed airflow such as from an electric fan or air conditioner
vent.Thermocouple inputs are prone to measurement errors.
• When the HiLogger is moved to a location with significantly dif-
ferent ambient temperature, allow at least 30 minutes for thermal
equalization before measuring.
• Correct measurement may be impossible in the presence of
strong magnetic fields, such as near transformers and high-cur-
rent conductors, or in the presence of strong electromagnetic
fields such as near radio transmitters.
• If liquid enters the enclosure through an air vent or other opening, it
may damage the instrument's internal circuitry. Exercise caution con-
cerning the surrounding environment when installing the instrument.
Horizontal placement Upright placement
Handling the Instrument
• Do not allow the instrument to get wet, and do not take mea-
surements with wet hands. This may cause an electric shock.
• Do not attempt to modify, disassemble or repair the instru-
ment; as fire, electric shock and injury could result.
To avoid damage to the instrument, protect it from physical shock
when transporting and handling. Be especially careful to avoid
physical shock from dropping.
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 interfer-
ence to the reception of radio and television broadcasts.

Operating Precautions
8
Handling the Cords and Cables
• Avoid stepping on or pinching cables, which could damage the
cable insulation.
• To avoid breaking the cables and probes, do not bend or pull them.
• To avoid damaging the power cord, grasp the plug, not the cord,
when unplugging it from the power outlet.
Before Turning Power On
Using the Battery Pack
• For battery operation, use only the HIOKI Model 9780 Battery
Pack. We do not take any responsibility for accidents or
damage related to the use of any other batteries.
See: For more information about the battery pack, see the instruction manual
(on the included CD).
Using the AC Adapter
• Use only the supplied Model Z1005 AC Adapter. AC adapter
input voltage range is 100 to 240 VAC (with ±10% stability) at
50/60 Hz. To avoid electrical hazards and damage to the
instrument, do not apply voltage outside of this range.
• Turn the instrument off before connecting the AC adapter to
the instrument and to AC power.
• To avoid electrical accidents and to maintain the safety spec-
ifications of this instrument, connect the power cord pro-
vided only to a 3-contact (two-conductor + ground) outlet.
• Use only the designated power cord with this instrument.
Use of other power cords may cause fire.
• Before turning the instrument on, make sure the supply volt-
age matches that indicated on its power connector. Connec-
tion to an improper supply voltage may damage the
instrument and present an electrical hazard.
When the power is turned off, do not apply voltage or current to
the connectors. Doing so may damage the instrument.
• After use, always turn OFF the power.
• Brief power interruptions of 40 ms or less will not cause this
instrument to malfunction. However, Longer interruptions may
cause the Memory HiLogger to shut itself off, so consider local
power conditions before installing, as appropriate.
• To ensure that recording is not interrupted by power outages, you
can use the Z1005 AC Adapter and 9780 Battery Pack together.

Operating Precautions
9
About Inputs and Measurement
• The maximum input voltage (and the maximum rated volt-
age to earth) for the analog input terminals is 30 Vrms (or 60
V DC). If these limits are exceeded, the instrument may be
damaged and personal injury or death could occur, so do
not attempt measurement.
• Do not leave the Memory HiLogger connected to test
objects in environments where a voltage surge might
exceed the dielectric withstand voltage. Doing so could
result in damage to the Memory HiLogger, bodily injury or
fatal accident.
• Channels are insulated by semiconductor relays. When a voltage
beyond the specification is applied between the channels, the
semiconductor relay may short circuit. Please ensure that a volt-
age beyond specification, especially a surge such as a lightning,
is never applied. When an abnormal measurement value is
observed, please contact your dealer or Hioki representative for
inspection.
The waveform for an open channel may sometimes appear to be
influenced by the signals of the other channels being measured. If
you do not like this, please set the waveform display of the open
channel to OFF or short-circuit the input terminals of the open
channel by connecting the positive and negative terminal.

Operating Precautions
10
CD Handling
• 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 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, or for any problem
related to the purchase of a Hioki product.

Operating Precautions
11
Using a CF Card/USB flash drive
• Inserting a CF card/USB flash drive upside down, backwards or in the
wrong direction may damage the CF card, USB flash drive, or HiLogger.
• Never eject a CF card /USB flash drive while measuring or when the
HiLogger is or accessing the card. Data on the CF card/USB flash
drive may be destroyed. (The CF icon/USB flash drive icon at the
lower right is red while the card is being accessed.)
• Do not transport the HiLogger while a USB flash drive is connected.
Damage could result.
• As the CF card/USB flash drive is sensitive to static electricity, damage
to the CF card/USB flash drive or wrong operations by the HiLogger
may occur due to static electricity. Please be careful when handling it.
• With some USB flash drives, the HiLogger may not start up if power is
turned on while the USB flash drive is inserted. In such a case, turn
power on first, and then insert the USB flash drive. It is recommended
to try out operation with a USB flash drive before starting to use it for
actual measurements.
• The Flash memory in a CF card/USB flash drive has a limited operat-
ing life. After long-term usage, data storage and retrieval become diffi-
cult. In this case, replace the CF card/USB flash drive with a new one.
• We cannot provide compensation for data loss in a CF card/USB flash
drive, regardless of content or cause of the damage. Data is also cleared
from memory if a long time passes after measuring. Always maintain a
backup of important data stored on a CF card/USB flash drive.
• Although real-time saving to USB flash drive is supported, a CF card is
recommended for data preservation. Performance cannot be guaranteed
when using storage media other than a Hioki-specified CF card option.
• Use a USB flash drive whose continuous current consumption does not
exceed 300 mA (peak 500 mA). (The peak value is displayed as "Max
Power" under the USB flash drive self-test on the [System] screen.)
• Depending on how USB is used, the USB connector and instrument set-
tings may vary as shown in the chart below.
• The three USB methods of use described in the chart below involve
exclusive settings and cannot be used simultaneously.
USB method of use Connector
used [System] screen USB mode setting
Use a USB flash drive. Type A USB Memory (Default)
Communicate with the LR8431-20
and initiate measurement using the
Logger Utility software from a com-
puter (using a USB cable). Type B USB Communication
Read files on a CF card that is con-
nected to the LR8431-20 from a
computer (using a USB cable). Type B USB Drive

Operation and Screen Types
12
Operation and Screen Types
Select the item to
change.
Show available
setting options.
Select the desired
setting.
Changing screen contents
CF Card Slot
External control 
terminals
CHARGE LED
USB Port
POWER
Switch
Operating Keys
(Rear)
Battery
Compartment
Apply the new set-
ting,
or cancel it.
Analog Input 
Terminals
Pulse Input 
Connector
USB flash 
drive SlotAC Adapter
Socket
WAVE/DATA
Selects among waveform
screen displays (p. 13).
SET
Displays the Settings
screens, and switches
among the screen tabs with
each press (p. 14).
FILE
Displays file information
(p. 15).
CH/
Select channels.
ESC
Cancels changes to set-
tings.
Cursor Keys
Moves the position
of the cursor (blink-
ing selection) on
the screen.
ENTER
Accepts displayed
settings.
KEY LOCK
Disables keypad
operations. Press
and hold the left
and right cursor keys simul-
taneouslyfor threeseconds
to lock and unlock the keys.
(Zero Adjust)
Performs zero ad-
justment.
Press the up and
down keys simultaneously
to execute.
Press to save data manual-
ly (p. 23).
Press the center key to se-
lect waveform scrolling or
A/B cursor movement, then
press the left and right cur-
sor keys to scroll or move
(p. 26).
Setup and display
Saving operations
Scroll waveforms and
read cursor values
Choose a screen
Start and stop measure-
ment. The LED at the left
lights green while mea-
suring.
Start and stop
measurement
Operating Keys

Operation and Screen Types
13
Selects between
seven display
types.
The screen switch-
es each time you
press the key.
Operational infor-
mation is displayed
along the bottom of
the screen.
[Wave] Screen
Measurement data is displayed
as waveforms.
[Value+Cmnt] Screen
Measurement data is displayed
as numerical values with com-
ments.
[Wave+Calc] Screen
Measurement data is displayed
as waveforms with calculation
results.
[Gauge+Wave] Screen
Measurementdata isdisplayed
as waveforms with gauges.
[Wave+Value] Screen
Measurement data is displayed
as waveforms and numerical
values.
[Value] Screen
Measurement data is displayed
as numerical values.
[Wave+Crsr] Screen
Measurement data is displayed
as waveforms with cursor val-
ues.
Waveform/Numerical Screens
Selection is also
available from the
name of the current
screen displayed
near the bottom right

Operation and Screen Types
14
CH Screen
Make input channel settings
while viewing the monitor dis-
play.
Scaling Screen
Make these settings to convert
measured values to arbitrary
units for display.
Comment Screen
Enter channel comments.
Setting Screen
Make settings for recording.
Set numerical calculation,
auto-saving and timers.
Range Screen
Make settings while viewing all
channel settings.
Trig&Alm Screen
Recording criteria (triggering)
and warning sounds can be set
for each channel.
System Screen
Configure the system environ-
ment.
Selects between
seven display
types.
The screen switch-
es each time you
press the key.
Operational infor-
mationisdisplayed
alongthebottomof
the screen.
Settings Screens
Press the left/right
cursor keys to se-
lect between the
Settings screens.

Operation and Screen Types
15
File Screen
View and manage files on the
CF Card or USB flash drive.
File Screen
Operational infor-
mation is displayed
along the bottom of
the screen.

Measurement Procedure
16
Before measuring, be sure to read the "Usage Notes" in the Instruction Manual.
Measurement Procedure
Install the battery pack (option)
Rear
View
We recommend using the battery pack to provide backup during power outag-
es, and to preserve measurement data.
Connect the power cord
Top View
Connect the measurement cable
Top View
CH1CH10
Pulse Input Connector
Analog Input
Terminals
For pulse input signals: 
connect the Hioki 9641 Connection
Cable .
For voltage or temper-
ature measurement: 
connect appropriate
measurement or ther-
mocouples leads.
Insert a CF Card or USB flash drive (option)
Top View
Confirm that sufficient free space
is available, and for auto-saving,
that a CF card or USB flash drive
is inserted before measuring.

Measurement Procedure
17
Turn the power on
Right Side
View
Connect to the measurement object
Configure settings for measurement
Configure recording settings
on the Setting screen.
• Recording interval
• Recording length
• Auto-saving (if used)
Make other settings as
necessary.
Configure input channel set-
tings on the CH screen.
• Channel selection
• Input type
• Measurement range
Make other settings as
necessary.

Measurement Procedure
18
Press to start and stop recording with
the selected measurement conditions.
When [Repeat] is [Off] (default setting), one
recording length is acquired, and recording
stops automatically.
When [Repeat] is [On], recording proceeds
continuously.
Start and finish measuring
Start
Measurement Stop
Measurement
Analyze