SRi32H bit Digitizer with The S400 Fracturing Sensor


the sri32h with sensor 

 

LandTech introduces its new ultra high resolution digitizer/recorder unit which has been designed with the cooperation of GEObit. The technology is based on the SRi32 digitizer/recorder, initially designed for micro-cracking monitoring from the surface. Since Landtech is focusing in both PST and Fracturing Monitoring applications, the instrument has been re-designed, in order to comply with all the requirements and be able to operate with multiple ways. Special characteristics such as ultra high resolution, miniature size, ultra low power consumption (the unit can operate for one week with a small 12V/9Ah battery) combine to make the instrument the most competitive in today’s market. Our latest innovation in technology keeps LandTech several steps ahead today’s competition.

 

Technical Specifications

 

General

No. Channels

3/6

A/D Converter

Fourth Generation, Delta-Sigma, 32bits resolution

THD

-125dB

Input Resistance

500 kOhms differential

Sampling Rate

50-1,000 samples per second, in steps

Power

9-18 Vdc, 0.7W

RMS Noise

138dB @ 250 sps, 129dB @ 1,000 sps

Input Range

+/- 2.5V, +/- 5V, +/- 7.5V, +/- 10 v fully differential

ADC

Modulator

4th order Delta-Sigma Modulator

Filter

Programmable SINC, FIR, IIR Filtering, auto-calibration function

Filter Response

Selectable Minimum or Linear Phase Filter

Sensor Electronics

Type

Force-Balance applied on 4.5Hz geophone

Bandwith

0.2Hz  - 98Hz

Sensitivity

2,000V/m/sec

Sensor Dimensions

50mm dia x 180mm length

Cable Length

20 m, up to 100 m

Data Recording

Media

Dual Removable microSD Flash card

Data File Type

CORE32 format, embedded FAT32 file system

Information File

System log file

Recording Mode

Continuous, in ten minutes data files

Data Processing

Real Time Signal Processing

Real time event detection, P, S wave arrival time detection

Time Base

Type

12 channels GPS receiver/DPLL

Accuracy

Time : +/- 1 usec to UTC time pulse, +/-5 m to position

Timing Sources

Ultra low drift DPLL unit using TCVOCXO, RTC

Communication

Telemetry

Serial port, Ethernet port

Connectivity

Seiscomp/SEEDlink plugin, RS232 port

Seismometer Control & SOH

Commands

Four TTL commands remotely controlled

SOH

Four low resolution, +/- 10V inputs

Physical

Size

168mm x 106 mm x 68 mm

Weight

1.2 kg

Environment

Temp. Range

-20 to +70 0C

Humidity

100%, IP67 enclosure