Earth Data PR6-24 Portable Field Recorder Specification

No. of channels3 or 6 differential input
CMRRBetter than -100 dB
Input range±0.8 V, ±8 V, ±20 V User programmable
Input resistance2 MΩ differential; 1 MΩ each input to ground
Input offset drift10 µV per °C
Primary sample rates 1, 2, 4, 5, 10, 20, 25, 40, 50, 75, 100, 120, 125, 150, 200, 250, 300, 375, 500, 600, 750, 1000, 2000, 3000
Secondary sample rates Freely selectable from primary rate list,(as above) in 3 channel mode. Certain restrictions apply in 6 channel mode
Analogue responsed.c. to 0.4 of selected sample rate
RMS to RMS noise150 dB at 10 Hz and below
140 dB at 100 Hz and below
130 dB at 1000 Hz and below
Timing accuracyBetter than ± 10µs. (GPS locked)
MediaRemovable hard disk unit. (20 GB minimum), USB mass storage support (optional)
Data file type Any length Mini-SEED (stored on FAT32 partition - readable by Windows, Linux)
Operating systemLinux
Additional stored information GPS activity, battery voltage, ambient temperature, disk temperature. Four low resolution analogue channels at 1 Hz
Power requirements10 to 18 V (2.5 W average) at 100 Hz 3 channels, 3W for 6 channels, with cycled GPS
Power savingGPS cycling, Window operation, Low supply voltage switch off.
Disk docking station IEEE-1394 (FireWire) or USB connection from Earth Data docking station to host (FireWire or USB compatible) PC
10/100baseTx ethernetCommunicate using TCP/IP (e.g. FTP client, telnet)
Modem Connect using PPP client (e.g. Windows Dial up networking - then communicate with standard TCP/IP FTP client or telnet)
USB (optional)Connectivity with other USB devices
WLAN - bluetooth (optional)Communication with PDAs, laptops, hand-helds, etc (requires USB interface)
Dual power connectors2 x 12 V input; fused power output. 1 x 12 V if USB option selected. Low supply shut-down facility.
External Modem Automatic wake up via ring indicator
Ethernet AND real time monitorEthernet is 10/100baseTx
Real time monitor is RS232
Signal channels 1 to 3 Includes raw power output. Optional stabilised ± 12 V output. Calibration output (+5 V, 0 V, -5 V)
Signal channels 4 to 6 Includes raw power output. Optional stabilised ± 12 V output. Calibration output (+5 V, 0 V, -5 V)
Ancillary channels 4 low-resolution analogue inputs. 12 bits, ± 10 V, 1 Hz. 2 digital outputs (1 TTL, 1 open collector 50 V)
GPS antenna5 V or 3 V powered types available.
Size 154 x 210 x 227 mm
WeightRecorder only 3.5 Kg: Disk 0.35 Kg
Temperature range-20 to +55 °C
WaterproofingTo IP67 standard
HousingInjection moulded ABS.

This specification is subject to change without notice.