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Last modified by robert on 2026/02/27 19:58
From version 100.1
edited by robert
on 2026/02/13 22:02
Change comment: There is no comment for this version
To version 103.1
edited by robert
on 2026/02/16 17:55
Change comment: There is no comment for this version

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416 416  
417 417  ----
418 418  
419 += Instrument Response =
420 +
421 +We are aware that there are various different published responses for these instruments and trust very few of them. One has to be careful with how polarity is handled between groups as well, and if one is working in integer counts (the ANSIR default) or mV (unclear why anyone would use this as it makes file sizes enormous). The response information published below is in **counts** and seems to fit well in huddle tests. Note that the response is the same for all channels and all units (e.g. there are no bespoke calibrations!), all appear to be sample rate insensitive, and the IGU data has been inverted (multiplied by -1) as described here: [[5Hz Node Polarity Issues>>https://auspass.edu.au/xwiki/bin/view/Data/AusPass%20Data/#HSmartSoloNodePolarityIssues]]
422 +
423 +== IGU 16HR-3C ==
424 +
425 + '16HR3C': {'poles':[(-22.211059+22.217768j), (-22.211059-22.217768j)],
426 + 'zeros':[0j, 0j],
427 + 'gain':1,
428 + 'sensitivity': 257019225.55108312}
429 +
430 +[[X axis is samples (.01 s), Y axis is velocity (m/s)>>image:IGU16_Z_huddle.png]]
431 +
432 +[[X axis is samples (.01 s), Y axis is velocity (m/s)>>image:IGU16_N_huddle.png]]
433 +
434 +== IGU 16-1C ==
435 +
436 +== BD3C-5 ==
437 +
438 + 'BD3C': {'poles':[(-1720.4+0j), (-1.2+0.9j), (-1.2-0.9j)],
439 + 'zeros':[(14164+0j), (-7162+0j), 0j, 0j],
440 + 'gain':1.69726e-05,
441 + 'sensitivity': 702651512.6046528}
442 +
443 +== Horizontal noise & how to avoid ==
444 +
445 +The 5 Hz nodes are susceptible to horizontal noise due to the placement of geophones in the units, **but this can be mitigated by completely burying the units flush with the ground.** In the below example, the node was set on the floor of our basement set on its plastic carrying case support. As such the amount of horizontal noise noticeably increases above ~~ 10Hz.
446 +
447 +[[Power spectrum huddle test vs a CMG-6TD (S1) and TC120/Centaur combo, all filtered 0.5-5 Hz. The N and E channels have excess noise above 10Hz due to "sticking up" out of the ground.>>image:IGU16_spectrum.png]]
448 +
419 419  = **Cleaning** =
420 420  
421 421  When assembled, the nodes are water resistant but not submersible. They can handle a good spray and wipe-down. A strong, non-wire brush is helpful to reach areas between the metal spikes on the bottom.
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518 518  |**Dimensions (LxHxW)**|558 x 357 x 300mm
519 519  |**Input rating**|100-210V - 50/60Hz
520 520  |**Power**|1000W
521 -|**Weight**|14.5kg
522 -|**Weight with cables**|21kg
551 +|**Weight**|14.5 kg
552 +|**Weight with cables**|21 kg
523 523  )))
524 524  
525 525  (% class="box" id="HSmartSoloBD3C-16PortableBatteryCharger" %)
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531 531  |**Dimensions (LxHxW)**|625 x 500 x 366mm
532 532  |**Input rating**|100-210V - 50/60Hz
533 533  |**Power**|100W
534 -|**Weight**|21.5 - 24kg
535 -|**Slots no.**|16
564 +|**Weight**|21.5 - 24 kg
565 +|**Capacity**|16 nodes
536 536  |**Download Speed**|20MB/sec/slot
537 537  )))
538 538  
... ... @@ -542,11 +542,11 @@
542 542  
543 543  [[image:20250729_124644.jpg]]
544 544  
545 -|**Dimensions (LxHxW)**|625 x 500 x 366mm
546 -|**Input rating**|100-210V - 50/60Hz
547 -|**Power**|640W
548 -|**Weight**|26.3kg
549 -|**Slots no.**|16
575 +|**Dimensions (LxHxW)**|625 x 500 x 366 mm
576 +|**Input rating**|100-210V - 50/60 Hz
577 +|**Power**|640 W
578 +|**Weight**|26.3 kg
579 +|**Capacity**|16 nodes
550 550  )))
551 551  
552 552  (% class="box" %)
... ... @@ -556,9 +556,9 @@
556 556  [[image:20250729_124957.jpg]]
557 557  
558 558  
559 -|**Dimensions (LxHxW)**|590 x 225 x 405mm
560 -|**Weight**|8.2kg
561 -|**Slots no.**|6
589 +|**Dimensions (LxHxW)**|590 x 225 x 405 mm
590 +|**Weight**|8.2 kg
591 +|**Capacity**|6 nodes
562 562  )))
563 563  
564 564  (% class="box" %)
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573 573  
574 574  18.0kg (full)
575 575  )))
576 -|**Capacity**|6
606 +|**Capacity**|6 nodes
577 577  )))
578 578  
579 579  (% class="box" %)
... ... @@ -584,7 +584,7 @@
584 584  
585 585  |**Dimensions (LxHxW)**|225 x 200 x 550mm
586 586  |**Weight**|
587 -|**Capacity**|8
617 +|**Capacity**|8 nodes
588 588  )))
589 589  )))
590 590  )))
IGU16_N_huddle.png
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