SR124bit Digitizer


 

 

SR24bit

The SR-24 has 3 input channels, and capability for connection to a wide range of sensors. The digitizer is based on a powerful, wide dynamic range delta-sigma analog-to-digital converter, with very low noise characteristics and excellent power supply rejection. The sampling rate can be set to 40, 50, 60, 100, 125, 150, 200, 250, 300, 400 and 500 samples per second. Optional, sampling rates of 1, 2, 5, 10, 20, 25 and 600, 700, 750,1000 samples per second can be supported. Data are stored in a Compact Flash type storage unit. Typical storage unit is 2 GB, enough to store approximately 26 days data of 3 channels @ 100 samples per second. Larger than 2GB Compact Flash Card Unit can be used to increase the recording period.

 

Technical Specification:

 

General

No. Channels

3

A/D Converter

Sigma-Delta, 312KHz base rate, 24bits resolution

CMRR

Better than -100dB

Input Resistance

500 kOhms differential

Sampling Rate

1-750 samples per second

Power

9-18 Vdc ~ 1.9W (160mA@12Vdc)

RMS Noise

130dB@ 100 sps

Input Voltage

+/- 10Vpp bipolar, +/- 5Vpp bipolar, +/- 0.5Vpp bipolar

Data Recorder

Media

Removable compact flash card (Up to 2 GB, optional more than 2 GB)

Data file type

CORE24 format, software format converter available

Additional Information

Written on file header : battery voltage, site position

Recording Mode

Continuous

Recording Duration

26 days (continuous recording, 3 channels, 100sps, 2 GB CF)

Time Base

Type

12 channels GPS receiver

Accuracy

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

Communication

Telemetry

Over UHF Modem

Connectivity

Seiscomp/SEEDlink plugin, RS232 port

Physical

Size

300 mm x 250 mm x 120 mm

Weight

3.2 kg

Environment

Temp.Range

-20 to 70 0C

Humidity

100%, IP67 enclosure