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Predator-Petrel-Perdix VPM-B Upgrade pin




 
Our Price: £46.68 (56.02 inc VAT)

Product Code: VPM


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Description
 
Upgraded your Predator, Petrel or Perdix dive computer to VPM-B decompression.
This upgrade gives you the option of using the standard GF deco or switching the the VPM-B algorithm.
Input your serial number in the box above and checkout as normal, your unlock code will be email with in 24hrs.
NOTE: you will also need to update your firmware to the latest firmware before using the PIN code.

VPM Bubble Models.
VPM or the Varying Permeability Model is a decompression algorithm that attempts to model the behavior of bubbles within the human body during decompression. The algorithm was initially developed by David Yount in laboratory testing and coded into Fortran by Erik Baker.

The Shearwater Implementation.
Shearwater Research has implemented VPM-B according to the original Erik Baker Fortran specification. In addition to implementing the Baker model, Shearwater Research has added a new option. VPM-B dive profiles often have deep stops to control bubble formation with reduced time at shallow depths. The reduced shallow depth time can be quite aggressive with VPM-B so Shearwater Research has included a VPM-B Gradient Factor Surfacing (GFS) option. VPM-B/GFS allows VPM-B dives to be executed while ensuring that a gradient factor of 90% is never violated.
Features
  • Adjustable conservatism from 0 to +5.
  • VPM-B and VPM-B/GFS (Gradient Factor Surfacing)
  • Available as a firmware option to existing Shearwater Predators.

Average Rating: 5 of 5 Total Reviews: 34 Write a review »

  0 of 0 people found the following review helpful:
 
Password February 21, 2017
Reviewer: stefano beatrizotti from Verscio, TI Switzerland  
Fast, serious, clear ..... what else ?!

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Great service February 18, 2017
Reviewer: Filip Buksa from Pag, Zadar county Croatia  
Easy to order, awesome communication with seller

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  0 of 0 people found the following review helpful:
 
Perdix Upgrade October 3, 2016
Reviewer: Fernando V. Rueda from Constantia, Cape Town South Africa  
The codes were emailed to us within minutes of ordering, great service

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  0 of 0 people found the following review helpful:
 
A Must Have June 23, 2016
Reviewer: Robin Norman from Little Paxton, Cambridgeshire UK Highlands  
No need to say much here it is was quick, efficient and "does what it says on the tin". Would suggest a little bit more information be supplied on the VPM-B/90 setting, for those not fully conversant with gradient factors could be a little confusing as to how it affects 'run times' Matches the program on the Predator almost to the minute.

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  0 of 0 people found the following review helpful:
 
VPM-B June 8, 2016
Reviewer: Caroline from Bradford, West Yorkshire UK Mainland  
Dive buddy has the upgrade loaded on his Predator so purchased to ensure we have similar run times on dives. Easy to update computer and quick service receiving pin.

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