Mini-Seis III Pro™ Operating Manual
Page 7
Manual – A waveform mode where the instrument triggers based on a key press or
the application of an external trigger.
Ranges and Resolutions
The standard unit has a maximum seismic range of 10.24 in/sec (260 mm/sec) and a
maximum linear weighted acoustic range of 148 dB (512 Pa). The 16 bit seismic resolution at
the standard range is 0.0003125 in/s (0.00794 mm/s). The linear acoustic 16 bit resolution is
0.000156 Mb (0.0156 Pa). The maximum range of the seismic and acoustic sensors can be
modified at the factory for more or less sensitivity.
The downloaded data resolution can be changed between 16 bits and 12 bits with the
Seismograph Data Analysis software. Changing the resolution does not affect the native
data, which is stored using 16 bits. However, since the data are normally compressed when
accessed through the USB or serial interface, the 12 bit option will result in smaller file sizes.
The 12 bit seismic resolution at the standard range is 0.005 in/s (0.127 mm/s). The linear
acoustic 12 bit resolution is 0.0025 Mb (0.25 Pa).
Sample Rates
The available waveform sample rates are 1024, 2048, 4096, 8192 and 16384 over 4 or 8
channels of data. A 64K and 128K rate is available for single channel waveform. The
available histogram sample rates with the 4 channel model are 1024, 2048, 4096, 8192 and
16384. The 8 channel histogram sample rate is limited to no more than 8192.
W
AVEFORM
M
ODE
(4
OR
8
C
HANNEL
)
1K to 16K in powers of two.
W
AVEFORM
M
ODE
(1
C
HANNEL
)
64K or 128K.
H
ISTOGRAM OR
H
ISTOGRAM
/W
AVEFORM
M
ODE
(4
C
HANNEL
)
1K to 16K in powers of two.
H
ISTOGRAM OR
H
ISTOGRAM
/W
AVEFORM
M
ODE
(8
C
HANNEL
)
1K to 8K in powers of two.
Waveform Recording Duration
The waveform recording duration can be from 1 to 120 seconds at all sample rates. There is
also a pre-trigger of 1024 samples. The time of the pre-trigger will thus vary with the
selected sample rate. At a sample rate of 1024, the pre-trigger is one second. At a sample
rate of 4096, the pre-trigger is 0.25 second.
Battery Life
In waveform mode, at a sample rate of 1024 samples per second, the unit will operate for
approximately 7 to 10 days with a full charge. With the Timer Mode set to an eight hour
monitoring day, the continuous operating time can be extended to approximately one
