Changes for page ANU Seismic Data Loggers
Last modified by robert on 2026/02/19 15:45
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... ... @@ -16,10 +16,8 @@ 16 16 17 17 At 100 Hz and with a GPS cable connected these loggers draw about 220 mW of power once the screen is off (higher sample rates draw more power but only marginally, < 5 mW). Adding a sensor (e.g. a Trillium Compact 120) increases this to approximately 400 mW, or 0.4 volt-amps. So, in theory 7 Ah battery should last about 10 days without a solar panel, but in practice it seems to be a bit closer to 8 which may be due to variability in power drain while in getting GPS locks. 18 18 19 -For very sunny environments (latitudes < 30) a 20 Volt ,10 Watt solar panel should have no issue keeping these loggers alive over the summer months, and assuming unobstructed skies should also be fine over winter.**However** whenpossible a20 Watt paneworks best, especially as theyusuallycost only$10-20more thesedays.19 +For very sunny environments (latitudes < 30) a 20 Volts 10 Watt solar panel should have no issue keeping these loggers alive over the summer months, and assuming unobstructed skies should also be fine over winter. However there is no harm in using 20 or even a 40 Watt panel, especially for high latitudes, coastal regions, or areas without a full sky view. In theory up to a 60 Watt solar panel is fine, but we don't recommend anything over 40 Watts and that amount of power is already overkill. 20 20 21 -40 Watt panels can also be used, and may be needed for extreme climates, or areas without a full sky view. 60 Watt panels have also been known to work, but this is now reaching the the limit of what the loggers can reasonably handle for extended periods and are not recommended for long term deploys. 22 - 23 23 (% class="box infomessage" %) 24 24 ((( 25 25 Power issues are easy and cheap to solve relative to the cost of your experiment, don't skimp! ... ... @@ -291,7 +291,6 @@ 291 291 292 292 293 293 294 - 295 295 (% class="box" %) 296 296 ((( 297 297 = TerraSAWR Specs = ... ... @@ -355,6 +355,5 @@ 355 355 356 356 357 357 358 - 359 359 360 360 )))