Mandatory Gas Time Alarm at beginning of the dive

[Nandodiver]

@hhouter Just taking a guess… but it possible that the first order/serial of transmitters might be faulty…
My transmitters arrive in 15 july 2026

You should gather an excel with owner data to try to find a common pattern between the transmitters.

[Nandodiver]

date of arrival 15 july 2026

First 2 digits (YY): Year of manufacture
Next 2 digits (WW): Week of the year the device was made.
Remaining digits: Unique factory production numbers

Transmitter Model DP142
Serial 2625xxxxxxx
Serial 2625xxxxxxx

Nautic DW251
software 2.49.32
bluetooth 3.0.50
serial 2553xxxxxxxx

Nautic S DW253
software 2.54.12
bluetooth 3.0.54
Serial 2604xxxxxxxx

[hhouter]

@Nandodiver that might be an option but why is my EON Core on the same POD and same dive where the Nautic logs the alarm not giving any comparable errors? My expectation is that the errors are in the Nautic.

[Nandodiver]

@hhouter do you have the problem in :

Sunnto Tank POD (new version)

Or the

Suunto wireless tank pressure transmitter (old version)

[hhouter]

@Nandodiver I have the tank POD, i believe the transmitter only works with the older computers like Vyper and the D Range of dive watches.
I bought the POD in the beginning of this year and i’m not aware that there is a new version available.

[Nandodiver]

This morning i had 2 x Mandatory gas alarm with both dive computers connect to the same transmitter and completely diferent times

1x Nautic (right arm) (battery 45% )
1x Nautica S (left arm) (battery 18% )
1x transmitter on right side (backmount)

and from my findings i believe is related with bad communication between transmitter and dive computer

Ps: its the first time im using the configuration single gas tank, my normal configuration is multiple gas (even if both tanks are air ) Could be related or not with the alert/bad communication.

pps: this was the dive i had most dropouts (no idea why)

NAUTIC S

Mandatory gas alarm 7m26s
Air consumption 100L/Minute 7m31s
Dropouts time on Nautic S 8m41s + 9m.28s + 26m49s + 27m21s + 29.26s

Theres was some Dropouts that i didn’t record, not sure if was at same time has the Mandatoy gas alarm

NAUTIC

Mandatoy gas alarm 26m28s
Air consumption 100L/Minute 26m28s
Dropouts time on Nautic 9m19s + 26m43s + 27m20s + 29m24s.

[Nandodiver]

More prints

[Nandodiver]

more prints

[Nandodiver]

Here the Nautic S had dropout and i move the arm closer to the transmitter to re-connect

[Nandodiver]

here Nautic & Nautical S had dropout at same time, and i was able to check the air consumption in Nautic

[Nandodiver]

Another dropout Nautic & Nautical S

[Nandodiver]

The following air consumption is not making sense on the Nautic S
Tank 12 L x 197 bar = 2364 bar

start 197 Bar
end 43 Bar
154 Bar x 12L =1848
2.70 ATM x 44 minutes = 118

1848L / 118 =15,6L minute

[hhouter]

@Nandodiver This is why I think, the POD does not have anything to do with it, somewhere in the Ventilation and GasTime calculation as seen by @mikenizm something goes crazy, it is corrected after some time but this is a serious issue to be solved asap!!!

[Nandodiver]

@hhouter the air consumption is definitely a bug (starting new topic about it)

[hhouter]

@Nandodiver Correct, but might also be related to the Ventilation issue…