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Versione
italiana
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TECHNICAL
NOTES
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| Power supply | 2 x 1.5 VDC AA, alkaline battery |
| Internal voltage | +3.3 V, +3.6 V for the analog section |
| Power consumption | 75 mW (GPS inactive), 450 mW (GPS active) |
| Battery duration | 80 h continuous measurement, GPS inactive |
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| Number of channels | 3+1 analog |
| Amplifiers | all channels with differential inputs |
| Noise | < 0.5 μV r.m.s. @128 Hz sampling |
| Input impedance | 106 Ohm |
| Frequency range | DC - 360 Hz |
| Sampling frequency | 16384 Hz per channel |
| Oversampling frequency | 32x, 64x, 128x |
| A/D conversion | ≥24 bit equivalent |
| Max analog input | 51.2 mV (781 nV/digit) |
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| Display graphic | graphic, 128 x 64 pixels, back-lighted |
| Keyboard | soft-touch, 4 keys |
| Clock | internal, permanent with date and alarm, can be visualized also during the acquisition |
| GPS | 12 channels with time-marker (precision 1 μs) |
| Level | spirit, horizontal high precision, sensitivity 5' arc (0.083°) |
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| Connections |
type B, USB port |
| Data recording | internal memory, standard 512 Mb, optional up to 2 Gb |
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| Dimension and weight | 10 x 14 x 7.7 (height)
cm 1.1 kg aluminum case |
| Ground coupling | spikes and rheological cushion |
| Operating environmental conditions | temperature
- 10 / +70°C humidity 0-90% without condensation |
| Impermeability | IP protection index = 65 (dust proof, splash proof) |
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| Sensors | 3 orthogonal high
resolution electrodynamic velocimeters self-locking when not in acquisition |