Cressi computer problem

[marty5797]

Hi
I was diving yesterday and turned the dive after 20 minutes, I was diving the second dive of the day to the MV Xlendi wreck in Gozo with the first dive to the Cominoland Wreck with max depth of 36.9m. This is the 8th dive in 4 days and the previous days dive were 40m and 23.6 with all other dives to a depth of less than 20 m. I encountered a problem with the descent readings on my cressi leonardo computer which was showing I was desending way to quickly but I was level with my buddy in the blue at the time. I added air to the bcd but it still showed my descent rate was to quick so I added more air, when the computer reading changed I was ascending to quick and I then deflated but again the computer reading did not change this led to me going up and down and I turned the dive and done the safety stop and abandoned after 33 mins.
At first I thought maybe I was parked and pressed the wrong inflate and deflate buttons but I dive a scubapro glide bcd with red and grey inflate and deflate buttons which are difficult to get wrong.
Has anyone else had problems with the readings on Cressi Loenardo computers or was this diver error.
Thankfully I am OK with no side affect and will not dive again on this holiday Thanks in advance

 

[rongoodman]

I guess I'm confused as to why you're using your DC to monitor your descent rate and what "way to quickly" might mean. That being said said, depth sensors do fail from time to time. Can you compare the log of the dive to that on your buddy's computer?

 

[marty5797]

I was watching the descent rate on the computer and has visual and audio alarms that I was descending to quickly.
I had no visual references other than my dive buddy and listened to the computer

 

[rongoodman]

That makes no sense at all. Are you sure it wasn’t complaining about going deeper than the MOD for the gas you had set?

 

[therookie]

I was watching the descent rate on the computer and has visual and audio alarms that I was descending to quickly.
I had no visual references other than my dive buddy and listened to the computer

I'm confused by this as well. I also dive a Cressi Leonardo, and I've never seen anything related to a "descent rate" either on the DC itself or in the manual. Ascent rate indications and alarms, oh yes - very much so.

Were the depth readings on your computer about the same as the ones on your buddy's? Could definitely be a defective depth sensor.

Or as just posted - maybe it was an alarm about something else.

 

[Sascha314]

How did the displayed depth change during that? I mean thats normally the best and easiest to read reference.

 

[rongoodman]

I see no mention of the descent rate or an associated alarm in the manual. There are alarms for rapid ascent, depth, approaching NDL, PO2, and CNS toxicity.

 

[dmaziuk]

There is no descent rate on the Leo, but from my experience, a couple of bounce dives to 40-ish metres will push it out of the NDL very fast, esp. if you just do 3-minute safety stops and 45-minute SIs. If I had to guess, I'd guess your alarms were for blowing the mandatory deco stops(*).

Word Perfect Helpline

*) Whether Leo generates reasonable decompression schedules is another question.

 

[therookie]

There is no descent rate on the Leo, but from my experience, a couple of bounce dives to 40-ish metres will push it out of the NDL very fast, esp. if you just do 3-minute safety stops and 45-minute SIs. If I had to guess, I'd guess your alarms were for blowing the mandatory deco stops(*).

(*) Whether Leo generates reasonable decompression schedules is another question guaranteed to blow up this thread

Deco alarms were my second thought that occurred to me about 30 seconds after I typed my earlier response.

 

[stepfen]

Apart from not knowing how to use his/her dive computer, the OP also seems to not understand that the bcd's inflate/deflate buttons do not work the same way that elevator's up / down buttons work.

I hope I am wrong in both of these assumptions.

BTW welcome to scubaboard @marty5797 !!