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[gringo]

[uuidgen]

Tak tylko chciałbym się upewnić - naprawdę elektronika w rebie nie szacuje zużycia scrubbera na podstawie zużycia tlenu?

[andrzej4380]

[Motti]

[gringo]

[Kula]

uuidgen,

Cytat:

Tak tylko chciałbym się upewnić - naprawdę elektronika w rebie nie szacuje zużycia scrubbera na podstawie zużycia tlenu?

Z tego co wiem w większości konstrukcji nie, poprostu odlicza czas od wymiany. W Sentinelu w podstawowej wersji nie dość że mierzy temp scrubbera to jeszcze jakoś to koreluje z ilością dodanego do pętli tlenu do tego jeszcze bierze pod uwagę gazy i inne czynniki i doszacowuje dokładniej, natomiast w wersji Expedition na bieżąco mierzy ilość CO2 w pętli dzięki temu możesz bardzo dokładnie określić stan scrubbera...co jak wszystko ma wady i zalety.

[Motti]

[gringo]

tutaj odpowiedz z MP dotyczaca wydajnosci kartridzy do MK6

Molecular Products Ltd doesn’t supply a datasheet with these details because that work was done by Poseidon as part of its EN14143 testing on the whole unit. They may well share that with you if you ask them. You’re obviously aware that the breathing gas is denser at depth and your breathing work is harder against the higher density gas.

What we can tell you following higher ambient pressure testing of Sofnolime 797, that’s the same material as in the cartridge but in self filled cartridges, using ANSTI equipment and EN14143 conditions we have a reasonable idea of capacity changes.

Under the conditions of EN14143 using an APD Inspiration rebreather:
Water temperature of 4 C
Breathing rate of 40 litres per minute; 20 breaths at 2 litres tidal volume per breath
1.6 litres CO2 per minute added

At working depths of 20 metres and 40 metres the capacity of the absorber decreases from surface (1 Bar ambient) by approx 10% at 20 metres (3 Bar A) and 30% at 40 metres (5 Bar A) UNDER THESE CONSTANT CONDITIONS. This is to a CO2 breakthrough of 0.5KPa partial pressure. I assume you understand that no carbon dioxide exits the scrubber until breakthrough commences. We measure the duration to the point where the CO2 reaches 0.5KPa under the operating conditions.

This is true for scrubbers of 2 – 3 kg of Sofnolime 797 which includes the Sofnodive 797 cartridge. (~2.7kg)


Bear in mind, breathing rate, descent and ascent times and rates affect these times as the test is made at a constant depth of 20 or 40 metres with ‘descent’ to depth within 1 minute. Unlike in real life diving we allow the breakthrough to occur at depth. I wouldn’t recommend you try this on a dive.

Hope this helps.

Kind regards
Phil Heyes
Business Development Manager
Molecular Products Limited

[Motti]

[gringo]

pojawila sie 7 i pojawila sie taka informacja:
WARNING:
Diving to 60m affects the canister duration. The canister has
been tested for a duration of 120 minutes at 60m. According
to EN 14143:2013 the canister duration is to be determined via
a full dive profile. This is proven within the formal testing of
the Poseidon SE7EN by an accredited laboratory. Conducting
a 100m dive with 10minutes bottom time, using a prepacked
canister (Sofnodive 797) it was determined that such a dive
profile is within the canister duration. The dive was carried out
using a 11/69 Trimix, following the WeDive plan. Test conditions
were as follows; Water temp 4°C, and a breathing rate of 40lpm
producing 1.6 l CO2 per minute at STPD (Standard Temperature
& Pressure, Dry).

[Konrad Dubiel]

[Trajter]

[Konrad Dubiel]

[Piotrek Ginter]

[Trajter]

[Piotrek Ginter]

A ja znam 2 takich co maja 4

[Motti]