Changes for page ANU Seismic Data Loggers
Last modified by robert on 2025/06/20 12:31
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... ... @@ -12,9 +12,17 @@ 12 12 13 13 = Power Considerations = 14 14 15 -Both the LPR-200 (or "Low Power Recorder" 200) and TerraSAWR are designed to use as little power as possible .Forverysunny environments(latitudes< 30) a 10 Wattsolarpanel shouldsuffice,howeverthereisno harmin using 20 orevena40 Watt panel. We generally recommend 20 Wattpanelswith at least a 7 Ah battery.15 +Both the LPR-200 (or "Low Power Recorder" 200) and TerraSAWR are designed to use as little power as possible, and more or less use the same amount of power. 16 16 17 +At 100 Hz and with a GPS cable connected these loggers draw about 220 mW of power once the screen is off. 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. 17 17 19 +For very sunny environments (latitudes < 30) a 20V 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 + 21 +(% class="box infomessage" %) 22 +((( 23 +Power issues are easy and cheap to solve relative to the cost of your experiment, don't skimp! 24 +))) 25 + 18 18 = Data Card Formatting and Information = 19 19 20 20 Both the TerraSAWR and LPR-200 require SD Cards to be formatted in FAT32 filesystem. For 64Gb cards it can be difficult to format in FAT32, but [[software >>http://auspass.edu.au/field/fat32cardformatter.exe]]is available. ANU recommend SanDisk Extreme 150 mb/s cards in either 32 or 64Gb size. We strongly discourage using cards larger than 64Gb, and in general smaller cards are less likely to fail. We have also found that "adapter" cards (e.g. SD to microSD) are prone to having write issues and **strongly** advise against them. ... ... @@ -168,7 +168,7 @@ 168 168 169 169 = ANU TerraSAWR (Gen 3, FW 3.5a, 2017- current) = 170 170 171 - Wordstodescribe theTSAWR would gohere,ifneeded179 +Not sure there's much left to say 172 172 173 173 174 174