SPT300 Data Logger
Power Supply: 8V ~ 24V
Number of Channels: 6 (SPT300-6) or 12 (SPT300-12)
A/D Conversion: Option of 24-bit 6-ch (SPT300-6) or 24-bit 6-ch and 32-bit 6-ch (SPT300-12)
D/A Signal Generator: 32-bit DAC, for external resistance measurement and seismic sensor calibration with sinusoidal signal
Sampling Frequency:
32-bit: 62.5 Hz, 125 Hz, 250 Hz, 500 Hz, 1 KHz, 2 KHz, 4KHz
24-bit: 2 KHz, 4 KHz,6 KHz, 12 KHz, 24 KHz, 48 KHz, 96 KHz (lower frequency available upon request for 24-bit)
Basically, the 6-ch 32-bit and 6-ch 24-bit are working fully independently; this is the only product in the market which can acquire lower frequency and higher frequency simultaneously, eliminating the necessity to exchange low/high frequency coils and maintaining continuously record without losing low frequency data during high frequency measurement.
Analog Gain:
32-bit channels: 1, 4, 16, 64
24-bit channels: 1, 5, 30, 199
Input Impedance: 2M Ohm
Signal Bandwidth:
32-bit channels: DC ~ 2 KHz
24-bit channels: DC ~ 48 KHz
System Noise: Lowest in the industry: about 5 nV/sqrt(Hz) for 32-bit at gain of 16; about 5nV/sqrt(Hz) for 24-bit at gain of 199
Input Range: -3.2V ~ +3.2V differential with high voltage protection
External Sensor Resistance Measurement: Yes, useful feature for external sensors, such as electrode contact resistance measurement for evaluation of electrode
Acquisition Timing: GPS synchronized
GPS Positioning Accuracy: 2.5 meters (std.)
Data File: Stored in SD card, 24-bit and 32-bit channel data are stored in two different files, with the identical format
Communication Interface: USB, long-range wireless, and Ethernet (optional)
Firmware Upgrade: Using USB
Packaging: Ruggedized enclosure
Sensors: Can be connected to most of sensors, such as electrodes, coil magnetometers, geophones, etc. using respective adapter cables, such as Crystal Globe electrode and coils, LEMI, Zonge and Phoenix coils
Power Supply for External Sensors: ± 11 VDC
Pseudorandom Noise Transmitter Sequence Driver: Yes
Acquisition Scheduler: Yes, useful for acquisition without operator
Acquisition and QA/QC Software: Provided with unit; also able to convert Crystal Globe data format to KMS, Zonge, Phoenix data format for customer evaluation/comparison purpose (currently KMS format conversion implemented).
Purchase Configuration: 32-bit 6-Ch daughter board can be removed if only 24-bit 6-Ch is needed
Power Consumption: Lowest power consumption in the industry – about 2.2W during acquisition with all 12 channels enabled; much lower than nearest competitors
Size and Weight: Small size and light weight with internal battery; Size: TBD, about 9″ x 5″ x 4″