High technology for your life!
We produce a P-wave-detect alarm system for Shinkansen.
portable Digital seismometer
AcCo
Oh, Quake!
Displaying Seismic Intensity and Maximum Acceleration
in real time
Modified Mercalli Intensity (MMI)
is now available
Modified Mercalli Intensity
(MMI)
Acceleration (Gal)
MMI
MMI
MMI
MMI and Acceleration are displayed
alternately by 0.5 seconds.
in office
in school
in public place
・Digital display of Acceleration and Modified Mercalli Intensity(MMI)
・Alarm out with buzzer, LED and RS-232C
AcCo (Display of Acceleration)
・Possible to observe and save wave forms with PC AcCo (Display of Acceleration and MMI)
・2 way power supply with AC100V and battery
PC connection cable
（This battery is for backup in power failure.）
Extended cable for control switch
¥98,000
¥128,000
¥7,000
¥15,000
USAGE: alarm for earthquake / observation of earthquake / measurement of vibration
/ education for disaster prevention / teaching material for science etc.,
Contact address
System and Data Research Co., Ltd.
3-25-3, Fujimidai, Kunitachi-shi, Tokyo 186-0003 JAPAN TEL:+81
URL：www.sdr.co.jp
E-mail: [email protected]
42 574 4536 FAX:+81 42 574 4576
* The above-mentioned characteristic changes
not with a guarantee value but with observation
conditions. It is possible to customize some
parameters (for example, alarm continuation
time etc.). Please ask separately in that case.
(*1) 006P battery required for back up,
replacement per a year recommended if no
events are detected.
(*2) Without MMI option: 2 horizontal
components or 1 horizontal and 1 vertical
component (selective). With MMI option: 2
horizontal.
(*3) Without MMI option: Display more than
10Gal (preset) or 1-20Gal (selective). With
MMI option: Display more than 5Gal (preset).
(*4) With MMI option, vertical direction
cannot be observed.
(*5) Without MMI option: selectable from 12
stages of 10, 15, 20, 25, 30, 40, 50,
80,100,120,150 and 200Gal.
With MMI option: MMI Alarm is not set. More
than 40Gal (preset).
With/ Without MMI option Alarm levels can
be changed by a PC installed optional software.
(*6) It may cause damage for the instruments,
if not using the optional PC connection cable.
Physical Specifications
Dimension
17cm(w) x 12cm(h) x 6.5cm(d) (not including projections)
Weight
0.8 kg (not including a battery)
Power supply
AC100V, 50/60Hz, and 4VA (AC adapter attached, battery back up (*1))
Operating temperature
0-50℃
Operating humidity
less than 80% (not dew)
Measurement
Sensor type
Acceleration 2 direction (*2)
Measurement range
Each direction up to 2g (2 x 980Gal)
Noise level
less than 1Gal-rms
Resolution
Abbreviation 1/6Gal
Sampling rate
1/100seconds
Frequency range
DC-10Hz
Display
Frequency range
0.1-5Hz
The contents of a display The maximum acceleration value (*3), Modified Mercalli Intensity (option) (*4)
The display type
4 characters of high luminosity 7 segment Light Emitting Diode
Alarm output
Frequency range
0.1-5Hz
Alarm conditions
Exceeding of setting level (*5)
The display method
Red Light Emitting Diode luminescence, buzzer and output via RS-232C
Output
The contents of an output
Waveform and other information
The output method The original procedure using RS-232C (D-SUB 9 pin socket), (Separately
optional software and optional cable necessity (*6))
Instrumental Intensity for
MMI by AcCo
Intensity Description of effects
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
Not felt except by a very few under especially favorable circumstances.
Felt only by a few persons at rest, especially on upper floors of buildings. Delicately suspended
objects may swing.
Felt quite noticeably indoors, especially on upper floors of buildings, but many people do not
recognize it as an earthquake. Standing automobiles may rock slightly. Vibrations are like passing
of truck.
During the day felt indoors by many, outdoors by few. At night some awakened. Dishes, windows,
doors disturbed; walls make creaking sound. Sensation like heavy truck striking building. Standing
automobiles rocked noticeably. Acceleration is 15-20 cm/s/s, average peak velocity is 1-2
cm/s.
Felt by nearly everyone, many awakened. Some dishes, windows, and so on broken; cracked
plaster in a few places; unstable objects overturned. Disturbances of trees, poles, and other tall
objects sometimes noticed. Pendulum clocks may stop. Acceleration is 29-39 cm/s/s, average
peak velocity is 2-5 cm/s.
Felt by all, many frightened and run outdoors. Some heavy furniture moved; a few instances of
fallen plaster and damaged chimneys. Damage slight. Acceleration is 59-69 cm/s/s, average
peak velocity is 5-8 cm/s.
Everybody runs outdoors. Damage negligible in buildings of good design and construction; slight
to moderate in well-built ordinary structures; considerable in poorly built or badly designed
structures; some chimneys broken. Noticed by persons driving cars. Acceleration is 98-147
cm/s/s, average peak velocity is 8-12 cm/s.
Damage slight in specially designed structures; considerable in ordinary substantial buildings with
partial collapse; great in poorly built structures. Panel walls thrown out of frame structures. Fall of
chimneys, factory stack, columns, monuments, walls. Heavy furniture overturned. Sand and mud
ejected in small amounts. Changes in well water. Persons driving cars disturbed. Acceleration is
245-294 cm/s/s, average peak velocity is 20-30 cm/s.
Damage considerable in specially designed structures; well-designed frame structures thrown out
of plumb; great in substantial buildings, with partial collapse. Buildings shifted off foundations.
Ground cracked conspicuously. Underground pipes broken. Acceleration is 490-539 cm/s/s,
average peak velocity is 45-55 cm/s.
Some well-built wooden structures destroyed; most masonry and frame 60 structures destroyed
with foundations; ground badly cracked. Rails bent. Landslides considerable from river banks and
steep slopes. Shifted sand and mud. Water splashed, slopped over banks. Accelerations are
more than 588 cm/s/s, average peak velocity is more than 60 cm/s.
Few, if any, (masonry) structures remain standing. Bridges destroyed. Broad fissures in ground.
Underground pipelines completely out of service. Earth slumps and land slips in soft ground. Rails
bent greatly.
Damage is total. Waves are seen on ground surface. Lines of sight and level distorted. Objects are
thrown into the air.
* This table is extracted from Bolt, Bruce A. Abridged Modified Mercalli Intensity Scale, Earthquakes Newly Revised and Expanded, Appendix C, W.H. Freeman and Co. 1993, 331 pp.
* Legend: "cm/s/s" is the acceleration unit, the gravity acceleration is nearly equal to 980cm/s/s which
generates a force equal to the weight of the object.
"cm/s" is centimeters per second; 60 cm/s is
about 1.4 miles per hour
10000
Gal
M odified M erc alli Intens ity
b y C .F.R ich te r(1 9 5 8 )
re vis e d b y B.A.Bo lt(1 9 9 3 )
b y D a vid J. Wa ld (1 9 9 9 )
1000
P
G 100
A
10
1
1
2
3
4
5
6
7
8
9 10 11 12
MMI by AcCo (simulation)
10000
5
H
z
1000
P
G
A
100
b
y
A
c
C
o
Gal
M odified M erc alli Intens ity
b y C .F.R ich te r(1 9 5 8 )
re vis e d b y B.A.Bo lt(1 9 9 3 )
b y D a vid J. Wa ld (1 9 9 9 )
10
1
1
2
3
4
5
6
7
8
9 10 11 12
MMI by AcCo (simulation)