Earth Data EDR-210 Recorder Specification

GENERAL
No. of channels3 or 6 differential input
Input impedance1 MΩ (any input to ground)
Input CMRRBetter than -100 dB
Number of gain ranges4 (very low gain; low gain; high gain; very high gain)
Input sensitivity20 nV, 100 nV, 1 µV or 2.5 µV per bit (24-bit word size)
Input range±0.16 V, ±0.8 V, ±8 V, ±20 V user programmable
Gain accuracyWithin 0.1 dB after auto-calibration
D.C. offset±5 µV low gain and very low gain; ±1 µV high gain and very high gain
Offset drift±10 µV/°C
CrosstalkBetter than -120 dB
A TO D CONVERTERS
Number of A to D Converters3 or 6 (one per channel)
TypeEarth Data proprietary Delta Sigma Converter
Samplong frequency192 kHz
Filter typeLinear pahse
Alias Portection Spurious in band signals better than -120 dB as a result of any frequency above the passband and any amplitude up to full scale
Primary sample rates1, 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 ratesAs above (3 channel unit); Sub-division of primary rate (6 channel unit)
RMS to RMS noise150 dB below 10 Hz
140 dB below 100 Hz
125 dB below 1000 Hz
Analogue responsed.c. to 0.4 of selected sample rate
Spurious tonesNothing above -160 dB (input short circuit)
Intermodulation products Less than -120 dB for any two sine wave frequencies within the passband at half full scale amplitude
Timing accuracyBetter than ±10 µs (GPS locked)
Sensor Power12 V ±0.2 V available on input connector. (100 µA current limited)
AUXILIARY INPUT CHANNELS
Number of channels4 (six channel units); 8 (three channel units)
Type of conversionMultiplexed successive approximation; 16 bit
Input range±10 V
Sampling rate1 Hz
OUTPUT
Available interfacesEthernet TCP/IP; RS232; USB
Internal storage FLASH (allows more than 3 hours history at 100 Hz. Expandable by fitting Internal Compact Flash. Removable hard disk drive in sealed enclosure, 160GB capacity.
ADDITIONAL FEATURES
Digital outputsOne TTL level output; One open collector to 50 V
GPSInternal and/or external options available
ENVIRONMENTAL
HousingMoulded glass loaded ABS
Water proofingTo IP67 standard (water only)
Operating temperature-20 to +60 °C
Storage temperature-40 to +80 °C
POWER REQUIREMENTS
Supply voltage range10.5 V to 28 V
Power consumption 800 mW (no comms 3 channel unit); 1.2 W (ethernet, 3 channel unit); 1.5 W (ethernet and USB. 3 channel unit)
SIZE AND WEIGHT
DimensionsLength 230mm; Width 100mm; Height 150mm
Weight 1.6 kg