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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/08/08 16:09
From version 51.1
edited by robert
on 2025/06/30 19:28
Change comment: There is no comment for this version
To version 56.1
edited by robert
on 2025/08/06 16:45
Change comment: There is no comment for this version

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... ... @@ -14,9 +14,9 @@
14 14  
15 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 (higher sample rates draw more power but only marginally, < 5mW). 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 +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 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.
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 21  (% class="box infomessage" %)
22 22  (((
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23 23  Power issues are easy and cheap to solve relative to the cost of your experiment, don't skimp!
24 24  )))
25 25  
26 +(% class="wikigeneratedid" %)
27 +In the case of an LPR, there is a large compartment for housing an internal battery, able to accommodate anything from a 10-30Ah battery. To use a standard lead acid battery with a positive and negative terminal, a 6 pin adaptor must be used. This ensures the voltage from the external power port (pins A and C) connect to the battery and ensure the system actually recharges. (See [[Peripheral Equipment>>doc:Instrumentation.Peripheral Equipment.WebHome]] for a more comprehensive overview of this kind of setup)
28 +
26 26  = Data Card Formatting and Information =
27 27  
28 28  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.
... ... @@ -86,7 +86,7 @@
86 86  
87 87  * XX.ANUSR network and station name
88 88  * 100 Hz Sample Rate
89 -* 40V pp (or +/- 20 V) gain / Trillium Compact seismometer version
92 +* 40 Vpp (or +/- 20 V) gain / Trillium Compact seismometer version
90 90  * Record on Restart enabled
91 91  
92 92  Note that if a user sets the gain incorrectly, this can be fixed later (assuming nothing clipped) by multiplying or dividing by factors of 2. The gain setting can be looked up from the logfile, else you may have to guess from a PSD or other method.
... ... @@ -134,7 +134,7 @@
134 134  
135 135  The seismometer model and serial number (up to 10 characters) can be set. Seismometer model options include:
136 136  
137 -* Trillium Compact (same for 20 and 120)
140 +* Trillium Compact (same for 20s and 120s models)
138 138  * CMG - 3ESP
139 139  * Guralp 40T
140 140  * LE-3D Lite
... ... @@ -175,19 +175,28 @@
175 175  
176 176  Instrument response can be downloaded from IRIS [[Nominal Response Library>>https://ds.iris.edu/ds/nrl/]] if need be, or [[directly from us>>http://auspass.edu.au/data/logger_response]] , or by downloading the response of an equivalent sensor at AusPass (e.g. get_stations(level='response') ).
177 177  
178 -[[Huddle test comparing a Trillium Compact 120 + TerraSAWR vs a Trillium Compact 120 + Nanometrics Centaur (M8.AUANU)>>image:TC120_ANU_vs_CENTAUR.png||data-xwiki-image-style-alignment="center"]]
179 179  
180 -= ANU TerraSAWR (Gen 3, FW 3.5a, 2017- current) =
182 +[[Amplitude and phase response for ANU logger at 50 Hz>>image:ANU_50hz_response.png]]
181 181  
182 -Not sure there's much left to say
184 +[[Amplitude and phase response for ANU logger at 100 Hz>>image:ANU_100hz_response.png]]
183 183  
184 184  
187 +[[Amplitude and phase response for ANU logger at 250 Hz>>image:ANU_250hz_response.png]]
185 185  
186 -= ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current) =
187 187  
188 -Ditto the mighty LPR!
190 +[[Amplitude and phase response for ANU logger at 1000 Hz>>image:ANU_1000hz_response.png]]
189 189  
190 190  
193 +[[Huddle test comparing a Trillium Compact 120 + TerraSAWR vs a Trillium Compact 120 + Nanometrics Centaur (M8.AUANU)>>image:TC120_ANU_vs_CENTAUR.png||data-xwiki-image-style-alignment="center"]]
194 +
195 += ANU TerraSAWR (Gen 3, FW 3.5a, 2014- current) =
196 +
197 +Earliest known model is dated July 2014 (though first deployed in 2019) and our current flagship model. Lightweight and small.
198 +
199 += ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2011 - current) =
200 +
201 +Earliest known model is dated May 2011 (but first deployed November 2012) and still in use today. Potentially capable of housing much larger batteries than the TSAWR due to the larger cavity space.
202 +
191 191  = ANU "ANUSR" (Gen 1, 2003? - 2012) =
192 192  
193 193  This logger has been retired for a long time and has a different instrument response. It used modular component boards and was powered via an acrylic case of 6 x 6V lantern batteries. There is a somewhat complete one above the CAT lab door if anyone is so inclined to have a look.
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215 215  
216 216  
217 217  
230 +
231 +
232 +
233 +
234 +
218 218  (% class="box" %)
219 219  (((
220 220  = TerraSAWR Specs =
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