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Last modified by robert on 2026/02/27 19:58
From version 103.1
edited by robert
on 2026/02/16 17:55
Change comment: There is no comment for this version
To version 99.1
edited by robert
on 2026/02/12 13:35
Change comment: There is no comment for this version

Summary

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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 -
449 449  = **Cleaning** =
450 450  
451 451  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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548 548  |**Dimensions (LxHxW)**|558 x 357 x 300mm
549 549  |**Input rating**|100-210V - 50/60Hz
550 550  |**Power**|1000W
551 -|**Weight**|14.5 kg
552 -|**Weight with cables**|21 kg
521 +|**Weight**|14.5kg
522 +|**Weight with cables**|21kg
553 553  )))
554 554  
555 555  (% class="box" id="HSmartSoloBD3C-16PortableBatteryCharger" %)
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561 561  |**Dimensions (LxHxW)**|625 x 500 x 366mm
562 562  |**Input rating**|100-210V - 50/60Hz
563 563  |**Power**|100W
564 -|**Weight**|21.5 - 24 kg
565 -|**Capacity**|16 nodes
534 +|**Weight**|21.5 - 24kg
535 +|**Slots no.**|16
566 566  |**Download Speed**|20MB/sec/slot
567 567  )))
568 568  
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572 572  
573 573  [[image:20250729_124644.jpg]]
574 574  
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
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
580 580  )))
581 581  
582 582  (% class="box" %)
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586 586  [[image:20250729_124957.jpg]]
587 587  
588 588  
589 -|**Dimensions (LxHxW)**|590 x 225 x 405 mm
590 -|**Weight**|8.2 kg
591 -|**Capacity**|6 nodes
559 +|**Dimensions (LxHxW)**|590 x 225 x 405mm
560 +|**Weight**|8.2kg
561 +|**Slots no.**|6
592 592  )))
593 593  
594 594  (% class="box" %)
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598 598  [[image:20250729_124502.jpg]]
599 599  
600 600  |**Dimensions (LxHxW)**|230 x 340 x 310mm
601 -|**Weight**|(((
602 -3.6kg (empty)
603 -
604 -18.0kg (full)
571 +|**Weight**|3.6kg
572 +|**Slots no.**|6
605 605  )))
606 -|**Capacity**|6 nodes
607 -)))
608 608  
609 609  (% class="box" %)
610 610  (((
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614 614  
615 615  |**Dimensions (LxHxW)**|225 x 200 x 550mm
616 616  |**Weight**|
617 -|**Capacity**|8 nodes
583 +|**Slots no.**|6
618 618  )))
619 619  )))
620 620  )))
IGU16_N_huddle.png
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