Compact Dynamic Strain Recorder
Entering the scene in advanced measurement of
strain, vibration, pressure, load, etc.
Signal conditioners and 16-bit A-D converters are incorporated, 4 channels each,
into a compact package to perform advanced measurement in limited spaces.
The 4-channel EDS-400A is equipped with signal conditioners and 16-bit A-D
converters to digitally record dynamic strain and voltage signals at high speeds. It
can be set to desired recording conditions through either a PC connected to the
LAN interface or a CF memory card inserted into the slot.
The recorder amplifies and digitizes input signals, and then saves the results in
the CF memory card. The PC, if connected to the LAN interface, enables monitoring of waveforms of the data being recorded. The acquired data can be transferred to the PC either on-line via the LAN interface or off-line via the CF memory
card. The accessory software enables the PC to graphically display the data while
the optional DAS-100A or NI DIAdem analysis software enables data analysis in
various modes on the PC.
Data is saved in CF card.
LAN interface enables PC to
control EDS-400A and to
collect data.
Control Software
•General Specifications
Operating temperature range: 0 to 50 °C
Operating humidity range: 20 to 90 %RH (noncondensing)
Vibration resistance: 49.03 m/s2 (5 G), 5 to 55 Hz (when operating)
Power source: 10 to 16 VDC; approx. 0.6 A (with 12 VDC supplied)
Connector: Hirose RM12BRD-4PH
Storage temperature range: –10 to 60 °C
Operating environment: No dust and no inductive noise from
large-capacity motor, etc.
Dimensions: 100 (W) x 50 (H) x 110 (D) mm (excluding protrusions)
Mass: Approx. 500 g
•Hardware Specifications
Number of measuring channels: 4
Input connectors: Tajimi R05-R5F
Applicable plugs: Tajimi R05-PB5M
Applicable sensors: Strain gages (4-gage system), strain-gage
transducers, voltage-output sensors
Applicable bridge resistance: 120 to 1000 Ω (4-gage system)
Gage factor: 2.00 fixed
Excitation voltage: 2 VDC
Measuring range
Strain: 6 steps of 1000, 2000, 5000, 10000, 20000 µm/m and OFF
Voltage: 6 steps of 1, 2, 5, 10, 20 V and OFF
Accuracy: Within ±0.5 %FS
Balance adjustment (zero suppress): ON/OFF setting possible for each
individual channel
Adjusting method: True electronic method (saved in nonvolatile memory)
Adjusting range
Strain input: Resistance ±2 % (±10000 µm/m) or more
Voltage input: ±10 V or more
Max. input voltage: ±30 V (for voltage measurement)
Frequency response range*: DC to 20 kHz (deviation: +1 dB, –3 dB)
Lowpass filter*
*Characteristics of analog section
Transmission characteristics: 2-pole (secondary) Butterworth
Cutoff frequency: 20 Hz, 200 Hz, 2 kHz or FLAT
Accuracy of cutoff frequency: –3 dB ±1 dB
Attenuation characteristics: –12 dB ±1 dB/oct.
Resolution of A-D conversion: 16 bits
Sampling method: Simultaneous sampling of all channels
Sampling frequency: 1, 2, 5, 10, 20, 50, 100, 200, 500 Hz,
1, 2, 5, 10, 20, 50, 100 kHz (16 steps)
Note: Selectable number of channels is 2 for sampling at 50 kHz, and
1 for sampling at 100 kHz.
Control switches: START/STOP, ZERO, READ
Condition setting: Through either PC or CF card in which necessary
conditions are written in advance
Start/stop of recording: Through PC, panel key or external contact
Zero suppress execution: Through PC, panel key or external contact
LED annunciators
POWER: Lights up when the power is ON.
SYNC: Indicates synchronization status.
MEAS: Lights up when recording is in progress.
1, 2, 3, 4: Indicate channel status.
READ: Indicates the status of measuring conditions.
Minimal installation
space required
4 channels
per unit
Sampling at a maximum 100 kHz
Palm-sized compact design
Applicable to strain and voltage
Well suited to strength tests and
vibration/noise measurement
Up to 8 units can be connected in cascade
for 32-channel simultaneous measurement. Rear input connectors allow direct
connection of sensors outputting strain and
voltage signals.
The maximum sampling frequency is 100
kHz for 1-channel measurement and 20
kHz for 4-channel simultaneous measurement. Thus, the EDS-400A can be utilized
for various purposes including strength
tests of car bodies and oil pressure measurement of engines and transmissions.
Designed to be far smaller and lighter than
KYOWA’s forerunners, the 4-channel data
logger can conveniently be carried for field
tests and business trips.
• Measured data is saved in CF card, enabling
long-term measurement.
Control Software for Pocket PC
The control software enables a Pocket PC to set measuring conditions, suppress zero, start the EDS-400A recording, and monitor
data in numeric and graphic formats.
The Pocket PC may be either hardwired or wirelessly connected to
the EDS-400A via LAN.
Operating environment: Pocket PC 2003
(Pocket PC and telemetry LAN transmitter and receiver are not provided.)
(Pocket PC, LAN interface card and LAN cable are not provided.)
Operation modes
Manual: A press of the START/STOP key starts it recording. The EDS400A stops recording when it completes recording in a preset number of measuring values or when the START/STOP key is pressed
once again.
Trigger: A press of the START/STOP key places the EDS-400A in
standby condition and when the trigger condition is satisfied, it starts
recording. The number of measuring values before the trigger point
can be specified for recording.
Trigger functions
Trigger source: External trigger signal, analog input
Trigger level: Can be set only for the analog trigger mode, in a plus/
minus full scale range.
Trigger slope: Rise, fall or both to be specified
Number of pretrigger data: Number of measuring values before
trigger point can be specified for recording.
Backup function: Setting conditions, balance adjustment parameters
LAN interface: 10BASE-T/100BASE-TX
Connector: RJ-45 modular jack
Monitor display: Waveforms, bar graphs and numeric data can be
monitored on the PC connected via LAN port.
Data storage: CF memory card (128 MB to 1 GB)
Synchronized operation: Dedicated synchronization cable enables
cascade connection of up to 8 units for synchronized recording.
The units connected in cascade record concerned data in the respective CF cards as separate files, which can be arranged in a single file
on the PC after collection.
•Control Software
Measuring condition setting functions
Sensors: Strain gages, strain-gage transducers, voltage-output
Number of measuring channels: Max. 32 (with 8 units of EDS-400A
connected in cascade)
Sampling frequency: 1, 2, 5, 10, 20, 50, 100, 200, 500 Hz,
1, 2, 5, 10, 20, 50, 100 kHz
Measuring mode: Manual, analog trigger, external trigger
Number of measuring values: Selectable in a range of 0 to 4294967295
(depends on the blank space of CR card)
Setting to 0 lets the EDS-400A record to the full capacity of CF card.
Measuring channel condition setting functions
Selection of measuring channels: Possible
Range: Selectable for each measuring channel
Strain: 1000, 2000, 5000, 10000, 20000 µm/m or OFF
Voltage: 1, 2, 5, 10, 20 V or OFF
Lowpass filter: A cutoff frequency is selectable for each measuring
channel from the following: FLAT (20 kHz), 2 kHz, 200 Hz and 20 Hz
Calibration coefficient: A value by which every measured value is
multiplied can be set for each measuring channel.
Offset: An offset value which is added to every calibrated value can
be set for each measuring channel.
Engineering unit: Selectable from 60 kinds for each measuring
channel. Input of an optional unit is also possible.
Channel name: Can be input for reference.
Zero suppress: ON/OFF setting possible for each measuring channel
Suitable as
onboard logger
operation possible
Analysis software
optionally available
Stand-alone operation
LAN interface provided
DAS-100A or NI DIAdem
The EDS-400A operates on 10-16 VDC.
A PC connected to the LAN interface
can control the EDS-400A as well as
monitor and collect measured data.
• START/STOP and ZERO buttons are provided on the front panel to enable start/
stop of recording and zero suppress.
Collected data can be effectively and
efficiently edited and analyzed using
KYOWA’s DAS-100A or the DIAdem
software available from National Instruments.
Major functions of DAS-100A: •Cutting of
necessary data section and editing •FFT
analysis, histogram analysis, differentiation/
integration •Arithmetic operations, filtering,
statistical operations
Protector Kit EDS-PMF
Shown above is the EDS-400A
coupled with the ESB-04A battery box, using EDS-PMF protector kits.
Remote Control Unit
Bridge Connectors
The protector kit is designed to not only protect the EDS-400A against
shocks but also couple it with the ESB-04A battery box or join multiple units of the EDS-400A.
Shown above are 2 units of the
EDS-400A vertically coupled using EDS-PMF protector kits. Horizontal coupling is also possible.
Strain input conversion cable, 30 cm long
Voltage input cable, 1.5 m long
Synchronization cable, 20 cm long
AC adapter (100-240 VAC)
Bridge connectors are required
to connect strain gages to the
buttons are provided to control the
recorder from a distant location.
•DB-120C-2R (right)
(for 2-wire system)
•DB-120C-3R (left)
(for 3-wire system)
Usable for 1-element 120Ω gages.
Thermocouple measuring unit
Enables the EDS-400A to measure temperature using a thermocouple.
F-V converter
Converts pulse-input frequency to voltage for measurement with the EDS-400A.
Condition saving: Measuring conditions and measuring channel
conditions can be saved in a condition file with a desired name.
The saved condition file enables immediate setup for measurement with the same conditions as previous.
Graph display of monitoring data: Monitoring data can be graphed
as wave forms or bar graphs.
Wave for m graph: Monitoring data are graphed with the number
of the data on X axis. The number can be set up to 1200, and a
maximum 8 channels of data can be graphed with numeric values on the same display.
Bar graph: Monitoring data of up to 8 channels are graphed with
the channels on X axis. Numeric values are simultaneously displayed.
Real-time graph: Recording data of up to 8 channels are graphed
with the number of the data on X axis. Numeric values are simultaneously displayed.
Measuring mode: Manual, analog trigger, external trigger
Manual: A press of the START/STOP key starts the EDS-400A
recording measured values in a preset number. If a PC is connected, sampling at 10 kHz or less enables the PC to perform
real-time data collection.
Analog trigger: When a preset trigger level is reached in the
designated channel, the EDS-400A starts recording measured
values in a preset number.
External trigger: An external trigger signal starts the EDS-400A
recording measured values in a preset number.
Data reproduction: Recorded data can be displayed in graphic
format or converted to CSV format.
Wave form graph: Data of up to 8 channels can be graphed as
wave forms.
Conversion to CSV format: A desired data section can be cut for
saving in CSV format.
Types of files
Measuring condition file: Saved with an extension of E4C
Measured data file: KYOWA standard format (extension: KS2)
•Operating Environment (PC)
CPU: Pentium III 700 MHz or higher, or the equivalent
OS: Windows 2000 (Professional)/XP (Professional, Home Edition)
Memory: 256 MB or more
Interface: 10BASE-T/100BASE-TX
Hard disk: Blank space of 10 MB or more (for other than storage of
measured data)
Display: 1024 x 768 dots or more: full color
CD-ROM drive: For installing the control software, etc.
•Standard Accessories
DC power cable P-57, 128MB CF memory card, CD-R (control software EDS-40A and instruction manual)
Protector kit firmly guards the mainframe as well as
facilitates connection of multiple units.
Protector Kit Mounted on Mainframe
•Protector Kit EDS-PMF
In combination with various sensors for automotive performance tests,
safety confirmation and evaluation of riding comfort, the EDS-400A enables measurement and analysis of physical quantities such as acceleration, load, component force, moment and oil pressure.
Examples of test results obtained by analysis software options
Strain gage
Bridge connector
Online data collection
via LAN interface
Voltage-output sensor
Offline data collection
Strain-gage transducer
CF memory card
Data Acquisition Time for Reference
with 128MB CF Card (Standard Accessory)
Number of Measuring Channels
100 kHz
8 min.
50 kHz
16 min.
8 min.
20 kHz
40 min.
20 min.
13 min.
10 min.
10 kHz
80 min.
40 min.
26 min.
20 min.
5 kHz
160 min.
80 min.
53 min.
40 min.
2 kHz
6.6 hr.
3.3 hr.
133 min.
100 min.
1 kHz
13 hr.
6.6 hr.
4.4 hr.
3.3 hr.
500 Hz
26 hr.
13 hr.
8.8 hr.
6.6 hr.
200 Hz
2.7 days
33 hr.
22 hr.
16 hr.
100 Hz
5.5 days
2.7 days
44 hr.
33 hr.
50 Hz
11 days
5.5 days
3.7 days
2.7 days
20 Hz
27 days
13 days
9.2 days
6.9 days
10 Hz
55 days
27 days
18 days
13 days
5 Hz
111 days
55 days
37 days
27 days
2 Hz
277 days
138 days
92 days
69 days
1 Hz
555 days
277 days
185 days
138 days
Specifications are subject to change without notice for improvement.
Safety precautions
Reliability through integration
Be sure to observe the safety precautions given in the instruction
manual, in order to ensure correct
and safe operation.
Manufacturer s Representative
Overseas Department:
1-22-14, Toranomon, Minato-ku, Tokyo 105-0001, Japan
Tel: (03) 3502-3553 Fax: (03) 3502-3678
e-mail: overseas@kyowa-ei.co.jp
Cat. No. 604B-U34
Printed in Japan on Recycled Paper 9/04 ocs
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