Weird TTS after gas change

[kaheksa]

Did a dive on a recent trip and the computer went a little grazy after a gaschange.

OSTC 2C
Depth 41m
Gasses: Tx23/25, Tx 18/46 and Nx99
GF: 20/85
V2.90
Battery full

Went down on the 23/25 bottom stage and when it was finished switched to 18/46 backgas. After the gasswitch the TTS went crazy and started climbing..200min, 600min, 1500min, 3500min. When I got to 9m it droped to about 400 and when I switched the gas to Nx99 at 6m it went back to normal again and showed about 15min TTS. Tried to do it again in the simulator and everything worked fine..

[heinrichsweikamp]

Too bad the decoplan is not recorded in your dive (Set CF25>0). I wonder which stop did went up here. As for the ceiling, it looks reasonable for your GF set and dive profile.

How did you setup your NX99? With or without change depth?

regards,
Matthias

[kaheksa]

It was set for 6m change