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Seismograph (The Mini-Seis)

Kategori Vibration Monitoring
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Seismograph (The Mini-Seis)

The Mini-Seis is the very definition of a great seismograph for an affordable cost. It is ideal for all kinds of blast vibration monitoring and for most continuous vibration monitoring in bargraph mode. Rugged, reliable and very easy to use, the Mini-Seis sets the standard for value in a seismograph.

Features
Lightweight and easy to use.
Rugged aluminum case shielded against interference.
Keypad and display for easy setup and data review.
Transducer and microphone interchangeable between units of like gain.
Variable recording ranges, trigger levels and record durations.
Rechargeable internal battery with typical 10 day continuous operation on a full charge.
Extended operation using AC power or external DC power.
The most powerful, yet easy to use, analysis software available

Application
All types of commercial blasting
Building implosions
Seismic exploration
Pile driving
Hoe ramming
Heavy equipment
Ordinance destruction

Specifications

Data Recorded One (1) acoustic and three (3) seismic channels.

Frequency Response Mini-Seis: 2 to 500 Hz. (-3 dB. points) at 2048 samples per second.
Lower sample rates reduce the high frequency response
proportionately.

Mini-Seis II: 2 to 250 Hz. (-3 dB points) at 1024 samples per second.

Seismic Sensors Three component mounted velocity geophones or accelerometers,
depending on the ordered recording ranges.

Microphone Ceramic element rated to at least 160 dB.

Memory Solid state with all summary, setup, and recorded data retained
with power off.
A lithium backup battery retains data if primary power fails.

Clock A 24 hour clock maintains the date and time accurate to within
1 minute per month, even if primary power fails.

Timer Mode Allows an instrument to be active only during selected hours
on a daily basis.

Display The high contrast LCD has two lines of 40 characters to facilitate
the instrument’s setup. It also allows the operator to view operating
parameters and summary data.

Optional Keypad Contains 6 keys for entering setup data and operating commands.

Power on Log A log of the last 64 on/off cycles is kept in memory to indicate the
active monitoring periods.
If the timer is used, the log is updated each time it activates.

Battery Internal 6 volt rechargeable.

Operating Time With a fully charged battery all models will operate from 7 to 10
days at 1024 samples per sec. Longer times may be obtained
using the timer mode or external power from a small solar cell
or automobile battery.

External Battery Life A standard automobile battery will keep the internal battery at full
charge for several months at moderate temperatures. If the external
battery fails, the unit will continue to operate on its internal battery.

Charging An internal charging circuit allows charging with the supplied plug-in
wall mount charger or any 10 to 15 volt DC supply.
Power supplies for international use are available.

Operating Temperature 0 to 130 degrees F (-18 to 54 degrees C)

Case Heavy gauge aluminum for effective electrical shielding and
rugged protection. A stainless steel case is optional.
The case is sealed allowing shallow burial.

Size Approximately 7.5 in. x 4.5 in. x 2.5 in.

Weight – Aluminum Case Approximately 3.5 lbs. (1.6 Kg.) without accessories.

Weight – Stainless Steel Adds 2 lbs. (.9 Kg.) above the aluminum case weight.

Weight – Accessories Approximately 6 lbs. (2.7 Kg.) including the storage case.

Waveform Data Mini-Seis: The full waveform signature is stored in solid state
memory for up to 340 events.

Mini-Seis II 1/8M: Approximately 10 to 20 typical blast events.
Mini-Seis II 1/4M: Approximately 50 to 100 typical blast events.
Mini-Seis II 1/2M: Approximately 150 to 250 typical blast events.

Summary Data Summarized data include the event time, date, battery voltage,
peak measurements, unit serial number and frequencies.
The summarized data are stored in solid state memory
for the last 341 events.

Sample Rate Mini-Seis: From 2048 samples per second per channel down to
32 samples per second per channel.

Mini-Seis II: 1024 or 512 samples per second per channel.

Recording Units English (U.S.) or metric.

Seismic Recording Ranges Standard (x2)
0.005 IPS to 2.5 IPS (0.125 to 64 MMPS)
0.01 IPS to 5.0 IPS (0.25 to 127 MMPS)
0.02 IPS to 10.0 IPS (0.50 to 254 MMPS)

Optional (x1 – accelerometers)
0.01 IPS to 5.0 IPS (0.25 to 127 MMPS)
0.02 IPS to 10.0 IPS (0.50 to 254 MMPS)
0.04 IPS to 20.0 IPS (1.00 to 508 MMPS)

Optional (x4)
0.0025 IPS to 1.2 IPS (0.063 to 30.5 MMPS)
0.005 IPS to 2.5 IPS (0.125 to 64 MMPS)
0.01 IPS to 5.0 IPS (0.25 to 127 MMPS)

Optional (x8)
0.0013 IPS to 0.6 IPS (0.033 to 15.2 MMPS)
0.0025 IPS to 1.2 IPS (0.063 to 30.5 MMPS)
0.005 IPS to 2.5 IPS (0.125 to 64 MMPS)

Acoustic Ranges 0.02 to 2.56 millibars (100 to 142 dB)
0.04 to 5.12 millibars (106 to 148 dB).

Trigger Levels Seismic
2.5 IPS Range – 0.01 to 0.57 IPS (0.25 to 14.5 MMPS).
5.0 IPS Range – 0.02 to 1.14 IPS (0.5 to 29 MMPS).
10.0 IPS Range – 0.04 to 2.28 IPS (1.0 to 58 MMPS).

Seismic trigger sensitivities are proportionally modified by optional
gains.

Acoustic – 106 to 142 dB or 112 to 148 dB.

Manual Trigger Allows triggering from the keyboard or by an external input. One unit
may be used to trigger additional instruments.

Record Duration Mini-Seis: From 1 to 6 seconds at a sample rate of 2048 samples
per second.
At lower sample rates, the duration is automatically increased
proportional to the amount of decrease in the sample rate.

Mini-Seis II: From 1 to 9 seconds at 1024 samples per second.

Cycle Time Mini-Seis: At 1024 samples per second, up to 12 seconds of data
can be taken with only 50 milliseconds between events.
After 12 seconds of data are stored, another event cannot be
taken until the previous data have been processed.
Processing requires about 3 seconds per second of recording time.

Mini-Seis II: Maximum continuous data time is 9 seconds.

Records Stored Up to 341 typical coal mine or quarry blast events.

Calibration Test (Seismic) A dynamic transducer test is performed automatically after each
event or manually on command. The test is stored in the summarized
data and may be downloaded as an event.

Calibration Test (Acoustic) An electronic test of the microphone is performed with the seismic test
and is stored in memory along with the seismic test.

84 Hour Cal Test In a remote installation, an automatic calibration test occurs if no event
has been recorded for 84 hours.

RS232 Serial Port Data can be downloaded and setup commands can be uploaded
directly by computer or remotely by modem.

Baud Rate From 1200 to 38.4K.

 

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Hotline :+62 81289270182 / 081585556782/WA
Phone :+62 21 7301725
Fax : +62 21 7301725
E-mail : info@majuselaras.com
or majuselaras@gmail.com

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Ciledug, Tangerang - Indonesia

Hotline 081585556782

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