Featuring USB flash drive support and improved accuracy
Your Personal 10-channel Logger
Real-time recording of up to 10ms/
sample data to USB or CF memory
Small and light enough for the palm
Logger Utility program supports
of your hand - yet completely isolated multi-channel measurements via PC
Lightest weight in its class and Easy Operation
Featuring USB flash drive support, faster performance, and more accurate thermocouple measurement
Redesigned to be even more capable, Hioki’s
10-channel logger still fits in the palm of your hand.
Ultra-compact for convenient portability
Dimensions and mass (HiLOGGER only) :
Approx. 176 mm (6.93 in) W × 101 mm (3.98 in) H × 41 mm (1.61 in) D, 550 g (19.4 oz)
Provides ten electrically isolated analog input channels for measuring
voltage and temperature, plus four pulse-counting input channels.
The isolated inputs alleviate constraints while minimizing interchannel
10 ms scanning of all channels provides rapid sampling capabilities
Track waveforms to meet demands for measuring sudden changes in loads
Widescreen, bright LCD gives excellent viewability
The beautiful, wide QVGA-TFT display is ideal for waveform monitoring.
Featuring USB flash drive support
The LR8431-20 can record measurement data on a USB flash drive for easy transfer to a computer. In long-term
measurement applications, it can also record to reliable Compact Flash cards for increased peace of mind.
Replace storage media during real-time recording
Switch out fully loaded storage media with new ones while recording without stopping the
measurement so that you can analyze any data recorded so far.
Note: During high-speed recording, be sure to insert the new storage media within 2 minutes of removing the former.
Display remaining recording time
The LR8431-20 lets you check the remaining recording time based on the available capacity
on your CF card or USB flash drive.
Load data from previous MEMORY HiLOGGER 8430-20 models
The LR8431-20 can also load waveform and settings data from previous MEMORY HiLOGGER 8430-20
models, allowing it to make measurements using the same settings and display past data.
Setting screen
Copy data between storage media
The LR8431-20 can copy recorded data between the CF card and USB flash drive.
Use only HIOKI CF cards, which are manufactured to strict industrial standards, for long-term storage of
important data. Operation of non-HIOKI CF cards is not guaranteed.
The LR8431-20 delivers improved thermocouple measurement accuracy
and reference junction compensation accuracy.
Example: When measuring 50°C water with a type-K thermocouple
The LR8431-20 provides improved accuracy of ±1.5°C, whereas previous models provided accuracy of ±3°C.
± 3°C
Measurement Accuracy: ±2°C
Reference junction compensation accuracy: ±1°C
Measurement Accuracy: ±1°C
Reference junction compensation accuracy: ±0.5°C
Evaluating motors and inverters used in electric and hybrid vehicles
The LR8431-20 enables stable, low-noise measurement of high-speed, high-resistance targets.
Efficiency measurement and performance evaluation of air conditioning equipment
The LR8431-20 supports simultaneous, multi-point measurement, for example of input and output
at multiple air conditioning registers or the temperature of internal components.
Temperature measurement and performance evaluation of internal components in electronic equipment
Used with a wind velocity converter, the LR8431-20 can measure cooling efficiency
inside equipment enclosures.
10ms 10ch
This compact logger excels in a broad range of settings,
from production lines to research and development.
Ten Isolated Analog Input Channels
There’s no need to worry about differing potentials of measurement objects when measuring temperature and
voltage. All ten analog channels are isolated. Even when measuring temperature and voltage at the same time,
interchannel interference and electric shock hazards are eliminated. The four pulse channels are ideal for counting
revolution pulses to measure rotation speed. (Pulse inputs share common ground.)
Note: Isolation between channels is possible through the use of semi-conductor relays. Voltage exceeding the product specifications, such as that originating from
lightning surges or other sources, should never be applied between each channel; otherwise the relays will short and the recorder will be damaged.
High-Speed Sampling
10 ms Sampling and Recording
Across All Channels
Abrupt changes in load need to be measured
during development of EV • HV • PHV, for which
multi-channel, 10 ms sampling is essential.
This HiLOGGER can track waveforms that
could not be followed with the 10 0 ms
sampling interval previously available.
10ms sampling
100ms sampling
Measurement comparison of abrupt
load change in waveform with 10 ms
(upper trace) and 100 ms sampling
10ms sampling
100ms sampling
Measurement comparison of 5 Hz
square pulse waveform with 10 ms
(upper trace) and 100 ms sampling
(using the supplied Logger Utility program)
Enhanced Noise Suppression
Noise-resistant measurement circuitry for improved
Measurement involves the deployment of a delta-sigma
type A/D converter. Suppress inverter switching noise
and line-frequency hum by digital filtering with the
HiLOGGER's proprietary oversampling technology.
Note: Optimum noise suppression is obtained for recordings at least two seconds long.
(using the supplied Logger Utility program)
Collect data in real-time with a computer
Logger Utility (Accessory)
The LR8431-20 ships standard with Logger Utility, a software application that supports multi-channel computer measurement.
Simply connect the logger to a computer with a USB cable.
USB connection ensures easy setup
Configure HiLOGGER settings from the Logger Utility. Settings are
sequentially ordered and guided from the PC application.
USB receptacle
for data communication
Up to five LR8431-20 instruments can be connected
to a single computer with USB cables.
Providing 50 analog and 20 pulse channels that can be graphically displayed
together in one window.
■ USB cable connection
A USB hub can be used to enable multi-channel measurement of multiple locations.
USB cable B type
Logger Utility program
Collect data in real-time with a computer
Logger Utility (Accessory)
Control measurements from the PC screen
Use the supplied Logger Utility program to control real-time data recording from the PC. Scroll backward through
the displayed trend graph window to view past waveforms even while recording.
Up to five LR8431-20 HiLOGGERs can be connected to one PC, providing 50 analog and 20 pulse channels that
can be graphically displayed together in one window.
Entire Recording Length: 1 s/div
Patented "dual-knob function"
You can use the scrollbar to confirm what the position of the waveform
portion displayed on the screen is within the whole recorded waveform.
The ability to change the time axis shown on individual windows provides
a convenient way to analyze data collected over an extended period of
Screen display range
50 ms/div magnification
Knob 1
Screen display range
100 ms/div magnification
Knob 2
■ Logger Utility (Bundled application software)
Model 8423, 8430-20, LR8431-20, LR8432-20, LR8400-20,
LR8401-20, LR8402-20, and LR8410-20
Windows 10/8/7 (32bit/64bit), Vista (32bit/64bit), XP (with SP2
or later) (32bit)
Measurements on multiple loggers connected by LAN or USB can
be controlled to sequentially acquire, display and save waveform
data (for recording up to 10 million samples)
Number of controllable instruments: up to 5 units of any
Real-time data Display: Waveforms (time-axis divided display possible), numerical
values (logging), and alarm status can be displayed at the same time
Numerical value display: Can be monitored in a separate window
Scroll: Waveform scroll while measuring
Data saving destination: Real-time data transfer to Excel, or Realtime data acquisition file (LUW format)
Event marks: Can be set while measuring
Data acquisition settings for the logger or logging station
Saving: The setting for multiple loggers or logging stations can be
saved together in one file (LUS format); Instrument configuration
settings can be sent and received
Processed data file: Real-time data acquisition file (LUW format),
Record to internal memory data (MEM format)
Display format: Simultaneously display waveform and numerical
value, (time-axis divided display possible)
Maximum number of channels: 675 channerls (measurement data)
+ 60 channels (waveform processing data)
Others: Display each channel’s waveform on 10 sheets, scroll, record
event mark, cursor, screen hard copy, numerical value display
Target data: Real-time data acquisition file (LUW format), record
to internal memory data (MEM format)
Converted sections: All data, designation section
Format: CSV format (separate by comma, space, tab), transfer to
Excel spreadsheet, arbitrary data thinning
Processing items: Four arithmetic operations
Number of processing channels: 60 channerls
Target data: Real-time data acquisition file (LUW format), record
to internal memory data (MEM format), data acquired in real
time, waveform processing data
Calculation items: Average, peak, maximum values, time to
maximum values, minimum values, time to minimum values,
ON time, OFF time, count the number of ON time and OFF time,
standard deviation, integration, area values, totalization
Target data: Real-time data acquisition file (LUW format), record
to internal memory data (MEM format)
Search mode: Event mark, time and date, maximum position,
minimum position, maximum pole, minimum pole, alarm
position, level, window, amount of change
Supported printer: Printer compatible with the OS
Target data: Real-time data acquisition file (LUW format), record
to internal memory data (MEM format)
Print functions Print format: Waveform image, report format, list print (channel
settings, event, cursor value)
Print area: The entire area, area between cursors A and B
Print preview: Supported
A variety of transducer outputs (DC voltage), or thermocouple measurements over 10 channels
4 Pulse (count) Input Channels, 1 Alarm Output Channel
Real-time Save & Long-term recording to CF Card or USB memory
For more reliable data protection, we recommend use of HIOKI CF cards, which are manufactured to strict industrial standards, for real-time saving of data or long-term storage of
important data. The USB communications function cannot be used while saving data to a USB flash drive. Operation of non-HIOKI CF cards is not guaranteed.
Terminal 2: Trigger Output
•Outputs a signal when triggering occurs
•Use for synchronous parallel triggering of
multiple HiLOGGERs
Terminal 3: External Trigger Input
Pulse Inputs (measure integration/revolution count variations)
Voltage/Temperature Measurement (using thermocouples)
•Four input channels
•Pulse inputs share common
ground with the HiLOGGER
•For measuring energy consumption
and cumulative flow
•Ten input channels
•Isolated walls around all input channel terminals
(M3 dia. screws)
•Voltage or temperature measurement settings can
be independently set up for each channel
Note: Thermocouple types K, J, E, T, N, R, S, B
Note: Uses special HIOKI Input Cable 9641
•Causes triggering when signaled by an
external trigger source
•Use for synchronous parallel triggering of
multiple HiLOGGERs
Integration count 0 to 1000M (count)
Rotation count
0 to 5000/n (r/s)
±100 mV to ±60 V
1 to 5 V
Thermocouple K, J, E, T, N, R, S, B
-200°C to 2000°C
Terminal 4: Alarm Output
•Outputs a signal when alarm criteria are satisfied
•The output signal shares common ground with the
•Use for simultaneous control of an external alarm device
To record 4 - 20mA instrumentation signals,
attach a commercially available 250Ω
shunt resistance to the input terminals
(between + and -) to convert the signals
to 1 - 5 V. Then use the 1-5V or the 10V
f.s. input range in the HiLOGGER.
Note: Open-collector output (active low, with voltage output)
Terminal 1: GND
USB Memory (for real-time data saving)
Real-time Save to CF Card
CF Card (for real-time data saving)
or USB memory
Save every measurement to CF card or USB memory in real time. For more reliable
data protection we recommend use of HIOKI CF cards, which are manufactured to
strict industrial standards, for long-term storage of important data.
(Non-Hioki CF cards are not supported)
•Supports HIOKI’s 2GB Card
Note: Non-Hioki CF cards are not supported
Recording Time (Save to External storage in real-time of binary data) Note: When saving in CSV data format, total recording time is 1/10 or shorter of the following.
Recording All Channels (ten analog, four pulse and one alarm)
Recording intervals
10 ms
1d 15h 14m
1 GB
3d 06h 29m
2 GB
6d 12h 58m
20 ms
1h 04m
3d 06h 29m
6d 12h 58m
13d 01h 57m
50 ms
2h 40m
8d 04h 13m
16d 08h 26m
32d 16h 53m
100 ms
5h 21m
16d 08h 26m
32d 16h 53m
65d 09h 47m
200 ms
10h 43m
32d 16h 53m
65d 09h 47m
130d 19h 35m
327d 00h 59m
500 ms
1d 02h 49m
81d 18h 14m
163d 12h 29m
2d 05h 39m
163d 12h 29m
327d 00h 59m
4d 11h 18m
327d 00h 59m
11d 04h 16m
10 s
22d 08h 33m
20 s
44d 17h 06m
30 s
67d 01h 39m
1 min
134d 03h 18m
2 min
268d 06h 36m
5 min to 1 hour
512 MB
Internal memory (7 MB)
Maximum recording time is inversely proportional to number of recording channels.
Because the actual capacity of the External strage is less than that indicated, and because the header portion of waveform files is not included in capacity calculations, expect actual
maximum times to be about 90% of those in the table.
"H" Exceeds 365 days.
■ Product Specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
General specifications (product guaranteed for one year)
Input System/
Analog Inputs
Analog inputs: 10 (M3 mm dia. screw terminal block), electrically
isolated between channels, and from chassis ground.
Input impedance: 1 MΩ (when voltage input or temperature
measuring with thermocouple burn-out detection OFF), 800 kΩ (with
thermocouple burn-out detection ON)
Pulse inputs: 4 channels (requires HIOKI Input Cable 9641)
Note: all pulse inputs share common ground with the HiLOGGER
Maximum rating:
60 V DC (max. voltage between input terminals without damage)
Maximum rated voltage from isolated terminals to ground:
60 V DC (max. voltage between input channel terminals, and from
Measurement Settings
Recording Intervals 10 ms to 1 hour, 19 selections
(sampling period)
Graph Timebase
Pulse Inputs
Alarm Output
Internal storage
(7 MB of two-byte data points, or four-byte pulse measurements)
CF card: CF card slot × 1 (Up to 2GB), Data format: FAT,
USB memory: USB 2.0 High-speed capable, series mini-B
receptacle, Data format: FAT, FAT32
Backup battery life for clock and settings: approx. 5 years
Backup Function For measurement data: 100 hours with fully charged
battery pack, or for as long as AC adapter is connected
External Control External Trigger/Event Mark input (exclusion function),
Trigger Output, Alarm Output
4.3-inch WQVGA-TFT color LCD (480 × 272 dots)
Display type
Displayable languages English, Japanese
One USB 2.0 series mini B receptacle
Functions: Control from a PC (Ver 1.00 or later),
Transfers internal data on the CF card to a PC
Temperature and humidity range for use:
0°C to 40°C (32°F to 104°F), (or 5°C to 30°C, 41°F to 86°F
when battery charging), 80% rh or less
Temperature and humidity range for storage:
(no condensation)
-10°C to 50°C (14°F to 122°F), 80% rh or less
Compliance standard Safety: EN61010, EMC: EN61326, EN61000
(1) 100 to 240 V AC, 50/60 Hz using AC ADAPTER Z1005
(when used with the AC Adapter, the AC Adapter has priority)
Power Sources
(3) 12 V battery
External storage
(10 to 16 V DC ±10%, Please contact HIOKI for connection cord)
Power Consumption 10 VA
Approx. 2.5 hours (with Battery Pack Model 9780 while saving to the CF
Operating Time
Dimensions and
Charging time: Approx. 200 minutes (@5°C to 30°C ambient)
Approx. 176 mm (6.93 in) W × 101 mm (3.98 in) H × 41 mm (1.61 in)
D, 550 g (19.4 oz) (HiLOGGER only)
Measurement Guide × 1, AC ADAPTER Z1005 × 1,
USB cable × 1, CD-R (Instruction Manual, data collection
software “Logger Utility”) × 1
Trigger functions
Trigger Source
(selectable for each channel)
External Trigger
Trigger Timing
All analog and pulse channels P1 to P4, external trigger,
logical sum (OR) and product (AND) of each trigger source
Criteria: Short-circuit between external trigger input and ground,
or voltage input (H-L transition from [3.0 – 5 V] to [0 – 0.8 V])
Pulse width: At least 1 ms (H), and 2 µs (L)
Input limits: 0 to 7 V DC
Start, Stop and Start/Stop
(different trigger criteria can be set to start and stop)
Level: Triggers when rising or falling through preset threshold
Window: Triggers when entering or exiting range defined by
preset upper and lower thresholds
Analog: 0.025% f.s. (f.s. = 10 display divisions)
Level Resolution Pulse: Totalization 1 count, Rotations 1/n [r.s] (n: pulses per rotation)
Records for a specified period before triggering; can be set
for real-time saving
(1) Output signal at trigger occured, (2) Output signal at start
or trigger occured, (1) or (2) mode selectable
Trigger Output
Open collector (active low, with voltage output, at least 10 ms pulse
Trigger Types
(Analog, Pulse)
width, Voltage levels: 4.0 to 5.0 V (H) and 0 to 0.5 V (L), Max. sink current:
5 mA DC, Max. applied voltage: 30 V DC)
span has elapsed
Enable continuous recording ON (records until the Stop key is pressed), or
disable to record for a specified time span (days, hours, minutes and seconds)
Enable to record for a specified time span, or between specified
Timer Recording (ON/OFF)
start and stop times
Waveform (Binary or CSV data): stores data to the CF card or USB memory
Auto Saving
channels, and with chassis)
Pulse signal characteristic: No-voltage relay contact “a”,
open collector or voltage input (High: ≥ 2.5 V, Low: ≤ 0.9 V),
Period: at least 200 µs (both high and low periods at least 100 µs)
One channel, non-isolated:
output from external control connector (common ground)
Signal criteria:
configurable high/low threshold levels, enter/exit threshold
window, logical sum (OR) and logical product (AND) for every
input channel. Output is refreshed each time recording starts.
Signal characteristic:
Open-collector output (active low, with voltage output)
Voltage levels: 4.0 to 5.0 V (H) and 0 to 0.5 V (L),
Max. sink current: 5 mA DC, Max. applied voltage: 30 V DC
3.5 MWords
Note: Setting is independent from the recording interval
(ON/OFF) Enable to repeat recording after the specified recording time
Recording Time
terminals to chassis ground without damage)
Input limits: -5 to +10 V DC (max. voltage between input terminals
without damage), non-isolated (common ground between pulse input
Note: All input channels are scanned within each recording interval
100 ms to 1 day per division, 21 selections
Data Storage
during real-time measurement
Numerical value calculations: stores calculated values to the CF card
or USB memory when finished measuring
Note: Don't shutdown while data saving
Each recording can be saved in a separate file
Overwriting save (endless loop recording):
New data overwrites the oldest data when the storage media is full
Divided Saving:
Enable to save data at a specified interval (days, hours and minutes)
Divided Saving: Specified Time (specify a time of day at which to start
saving data to files at a specified interval)
Note: Don't shutdown while data saving
Stored data can be recalled by the HiLOGGER in 3.5 MWord (7 MB)
Load Stored Data quantities (for a single channel; less for multiple channels)
Configure saving and reloading to and from CF card or USB memory
Settable Save/
or internal memory
Ten types for internal memory, no limit for CF card and USB memory
Calculations 1 to 4, may be simultaneous
Selections: average, peak, maximum and minimum values,
time-to-maximum and time-to-minimum
Selectable Filters 50Hz, 60 Hz, or OFF (digital filtering of high frequencies on analog channels)
Channel Settings
Enable/disable measurement (ON/OFF), selectable waveform color
Analog channels (10): Voltage (DC only), Temperature (thermocouple
only). Thermocouple types K, J, E, T, N, R, S, B
Channel Settings Pulse input channels (4): Count Integration or revolutions
Alarm output (1): Hold/not-hold, beeper enable/disable (ON/OFF),
Show/hide alarm waveform display (ON/OFF)
Measurement parameters
Measurement parameters
input ranges
(JIS C 1602-1995)
@23 ±5˚C/73 ±9˚F,
80% rh or less
After 30 minutes
Defined after zero
adjustment has been
Other Functions
Measurement parameters
Range of Measurements
Finest Resolution
100 mV f.s.
-100 mV to +100 mV
5 μV
1 V f.s.
-1 V to +1 V
50 μV
10 V f.s.
-10 V to +10 V
500 μV
20 V f.s.
-20 V to +20 V
1 mV
100 V f.s.
-60 V to +60 V
5 mV
1 V to 5 V
500 μV
1 − 5 V (Note)
Accuracy: ±0.1 % f.s. (Note: 1 - 5V range's f.s. = 10 V )
2000°C f.s.
Range of Measurements
-200°C to 2000°C
Finest Resolution
(K) -200°C to 1350°C
(J) -200°C to 1200°C
(E) -200°C to 1000°C
(T) -200°C to 400°C
(N) -200°C to 1300°C
(R) 0°C to 1700°C
(S) 0°C to 1700°C
(B) 400°C to 1800°C
K, J, E, T, : ±1.0°C (-100°C or more), ±1.5°C (-200°C to -100°C)
±1.2°C (-100°C or more), ±2.2°C (-200°C to -100°C)
R, S:
±2.2°C (300°C or more), ±4.5°C (0°C to 300°C)
±2.5°C (1000°C or more), ±5.5°C (400°C to 1000°C)
Reference junction compensation [RJC] accuracy:
±0.5°C (horizontal positioning), ±1°C (vertical positioning)
Internal [RJC] (internal reference junction compensation at 0°C):
Measurement accuracy = (temp. measurement accuracy) + (RJC accuracy)
External [RJC] (using external junction compensation at 0°C):
Measurement accuracy = temp. measurement accuracy only
Thermocouple burn-out detection: ON or OFF
Range of Measurements
Finest Resolution
1,000 M (count) f.s. 0 to 1,000 M (count)
1 (count)
Totalization mode: cumulative (counts from start)
Instantaneous value: instantaneous value during each recording period
0 to 5,000/n (r/s)
1/n (r/s)
5,000/n (r/s) f.s.
Pulse (Rotations) Settable pulses per rotation: 1 to 1,000
Slope Setting
("n" above is the number of sensor output pulses per rotation)
↑ (count of L-to-H pulse transitions), ↓ (count of H-to-L pulse transitions)
by position, or by upper/lower display limit values
Displayed Range Specified
(Upper/lower limit values only at Totalization mode)
Common Channel Settings
Decimal (display decimal values), Exponential (display base-10
exponents), or Off
Method: Ratio (set by slope and intercept), or 2-point (set by input/
output values at two points)
Other Common
Enter comments for each channel, set start/stop triggers and
Channel Settings alarm criteria
Options in Detail
Order Code: LR8431-20
(English model)
Supplied Accessories:
Measurement Guide × 1, AC ADAPTER Z1005 × 1, USB cable × 1,
CD-R (Instruction Manual, data collection software “Logger Utility”) × 1
Supplied Accessories
Removable storage (CF card)
Supplied with
PC Card adapter
Battery Pack
Use only PC Cards sold by HIOKI. Compatibility and performance are
not guaranteed for PC cards made by other manufacturers. You may be
unable to read from or save data to such cards.
PC CARD 2G 9830 (2 GB capacity)
PC CARD 1G 9729 (1 GB capacity)
PC CARD 512M 9728 (512 MB capacity)
100 to 240 V AC
Input cables
Charges while installed
in the HiLOGGER
PC Card Precaution
Ni-MH, Charges while installed
To prevent damage to
the instrument’s display
For pulse inputs, 1.5 m (4.92 ft) length
. or LCD protection, pairs of additional sheets
can be purchased separately.
Includes space for small items,
Neoprene rubber
Includes compartment for options,
Resin coated
Related Products
With built-in VOLTAGE/TEMP UNIT × 2 modules
With built-in UNIVERSAL UNIT × 2 modules
. ith built-in UNIVERSAL UNIT × 1,
30 isolated analog input channels
30 isolated analog input channels
30 isolated analog input channels
LAN/USB support, for measuring with a PC
Use a heat flow sensor to measure the movement and
volume of heat energy
Ultra-compact for convenient portability
15 to 120 isolated analog channels, with up to
600-channel systems available
10 isolated analog channels
LR8410 -20
15 to 105 isolated analog channels
Logging multi-point data has never been so easy
Install logging modules in hard-to-reach locations
Note: Company names and Product names appearing in this catalog are trademarks or registered trademarks of various companies.
TEL +86-21-63910090 FAX +86-21-63910360 / E-mail:
TEL +65-6634-7677 FAX +65-6634-7477
81 Koizumi, Ueda, Nagano, 386-1192, Japan
TEL +81-268-28-0562 FAX +81-268-28-0568
HIOKI KOREA CO., LTD. / E-mail: TEL +82-2-2183-8847 FAX +82-2-2183-3360
TEL +1-609-409-9109 FAX +1-609-409-9108 / E-mail:
All information correct as of June 17, 2016. All specifications are subject to change without notice.
Printed in Japan
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF