The device is a signal recorder for data acquisition systems. It is capable of processing four channels with bandwidths of up to 584 Hz. Resolution is 22 bits and the usable dynamic range varies from 111 dB with an input bandwidth of 36.5 Hz to 99 dB with an input bandwidth of 584 Hz.
 
The device consists of four separate A/D converter channels that are implemented using sigma-delta technology. Sigma-delta ADCs include on-chip digital filtering and, thus, the system filtering requirements are eased.
 
Up to 100 signal recorders can work together with RS-485 communication network. Maximum working distance is up to 1500m. RS-485 network communication work in low-power mode. It's diver output and receiver input is protected against +/-15kV electro-static discharge (ESD) shocks, without latchup. RS-485 network allowing error-free data transmission up to 250kbps. The network are designed for full/half-duplex communications.
 
 

APPLICATION	Seismic System   Strong Motion Accelerograms   Observation of Explosion  Exploration
FEATURES	22-Bit Sigma-Delta ADC  Each SR-22 has 4 A/D Channels  Input Range: +/-2.5V  Dynamic Range of 111 dB (at Cutoff Frequency 36.5 Hz)  +/-0.003% Integral Nonlinearity  On-Chip Low-Pass Digital Filter  Cutoff Programmable from 584 Hz to 36.5 Hz  Linear Phase Response  Software Control of Filter Cutoff Frequency  6V DC Power Supply  Low Power Operation: mW  CLOCK ACCURACY  WORKING TEMPERATURE: -20Co to 60Co
NETWORK	RS-485 Communication  Error-free data transmission up to 250kbps.  Full-Duplex  Maximum Communication distance 1500m