SPT200 Data Logger
Power Supply: 8V ~ 24VDC
Number of Channels: Option of 2-channel (SPT200-2) or 6-channel (SPT200-6)
A/D Conversion: 32-bit
D/A Signal Generator: 32-bit DAC for external resistance measurement and seismic sensor calibration with sinusoidal signal (Newer SPT200 version)
Sampling Frequency: 62.5Hz, 125Hz, 250Hz, 500Hz, 1KHz, 2KHz, 4KHz
Analog Gain: 1, 4, 16, 64
Input Impedance: 2M Ohm
Signal Bandwidth: DC ~ 2KHz
System Noise: About 5 nV/sqrt(Hz) at gain of 16 (lowest in the industry)
Input Range: -2.5V ~ +2.5V 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 (Newer SPT200 version)
Acquisition Timing: GPS synchronized
GPS Positioning Accuracy: 2.5 meters (std.)
Data File: Stored in SD card
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 electrodes and coils, LEMI, Zonge and Phoenix coils
Power Supply for External Sensors: ± 11V DC
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).
Power Consumption: Lowest power consumption in the industry – about 1.6W during acquisition with all 6 channels enabled; much lower than nearest competitors
Size and Weight: Small size and light weight with internal battery; Size: TBD, about 8″ x 5″ x 3″