Table T7. Power consumption of the NEREID-191 system.
|
Subsystem
|
Condition
|
Power consumption
(W) |
|---|---|---|
| CRM | 0.73 | |
| OBH | Mass locked, short cable | 2.7 |
| Mass unlocked, short cable | 2.5 | |
| Mass unlocked, measured at PDM | 3.3 | |
| DC/DC for OBH | No supply for OBH | 0.3 |
| DM24 | 1.55 | |
| SAM-191 | No disk running | 1.0 |
| Disk powered (10 s) | 8.16 (10 s) | |
| Disk spin up | 30.98 (maximum) | |
| Disk write | ~14.8 to ~15.8 (variable) | |
| (average over disk operation period) | (16.9) | |
| Increase by running GPS receiver | 0.15 | |
| MEG + 1 x OBH | 4.0 | |
| MEG + 2 x OBH | 7.33 | |
| SAM | 11-hr cycle average for a typical amount of incoming data: (100 sps + 20 sps) x 6 channels x 2 bytes | 1.77 |
| Total average: | ||
| MEG + 2 x OBH + SAM | 9.1 |
Note: CRM = combiner/repeater module, OBH = ocean borehole seismometer, DM24 = modular digitizer, SAM = storage acquisition module, MEG = multiple-access expandable gateway, PDM = power distribution module, GPS = Global Positioning System.