NDAS-8426N is a seismic data logger designed to acquire and transfer high quality data in seismic networks and to store data on a local drive.
NDAS-8426N provides a 24-bit synchronized data registration via 6 channels and is well suited for connecting analog instruments by various manufacturers.
Along with analog instruments, there is an option to connect digital seismometers and accelerometers made by R-sensors. The data are stored in a file on a local drive as well as on external USB drives in miniSEED, binary and text formats.
The SeedLink protocol is used for telemetry.
The system is clocked with a high precision quartz that is being corrected with the use of external sources of GPS/GLONASS accurate time signals as well as via Ethernet over NTP and PTP protocols.
The data logger has 4 auxilliary channels as well as alarm relays to control external devices.
Additional instruments are possible to connect.
Characteristics Delivery and warranty
|Dynamic range||132 dB at 100 sps|
|Supply voltage||12-48 V (7.5-60 V permissible)|
|Power consumption||1.2 W excluding sensors, Wi-Fi, 3G, Ethernet; 1.8 W typical average|
|Temperature range||-20...+85°C - standard SD-card|
|ADC sampling rate||1, 10, 50, 100, 125, 250, 500, 1000, 2000, 4000, 8000 Hz|
|Dimensions||225 х 146 х 55 mm excluding connectors dimensions|
|ADC resolution||24 bit|
|Reference generator stability||0.5 ppm|
|Case material||Aluminum alloy, IP-65 waterproof|
|Number of channels||6|
|Gain coefficients||1, 2, 4, 8, 12|
|Data recording mode||continuous, schedule|
|Data recording format||binary, ASCII, miniSEED|
|Data transfer||SeedLink over Ethernet|
|Inbuilt sensors for device health monitoring||temperature, humidity|
|Case connectors||7-pin type for RS-485 power and interface; 10-pin type for inputs of main ADC for calibration and sensors power (2 pcs); inputs of auxilliary ADC and outputs of signal relay (1 pc); micro USB-B for data reading and configuration; RJ-45 type for Ethernet; USB-A for connecting external drives and CME-ND digital sensors; SMA-F type for GPS / Wi-Fi / 3G / 4G / LTE antennas|
|Delivery set||1.5 m USB type A/B standard cable, 3 m active GPS antenna, Wi-Fi SMA antenna, microSD 32 GB (installed), User manual|
|GNSS receiver||GPS / GLONASS|
|GNSS timing accuracy||< 10 µs|
|Additional network options||Power over Ethernet, up to 24 ADC channels, low power version, RS-485 wired interface to connect external sensors|