Rebreather World - View Single Post

Skipbreather · 14th January 2007, 17:13

Quote: (Originally Posted by decoweenie)

Ken,

Have you tried to use the alkaline 9V battery in the Meg yet using your adapter ?

Based on your numbers above, the Meg consumes about ~100 ma/h (worst case) which gives the 9V alkaline about 3-4 hours - enough for to save dive.

Hi Phi

I’ve run an ALKALINE 9v battery on the primary side during various test dives. After 4 ½ hours of letting it fire the solenoid under normal swimming demand the under load voltage reading still showed IIRC (was more than 9 months ago) above 7 volts. That battery is still on my bench, waiting for more torture testing and it just now tested 8.58 volts on my Fluke DVOM.

2 caveats. First is that I know you’ve got the Smithers electronics. Mine are APECS 2.01. I’d advise a call to ISC to be certain 9v won’t fry the Smithers ‘leces. Second is I do not know if your Smithers package gives you access to real time voltages.

For those not familiar, one of the really valuable features of the APECS 2.x package is the ‘System Monitor’ page. It gives you the real time battery voltage and the mv seen by the handset for each O2 cell. For the primary side it also gives the voltage of the battery when under firing load from the solenoid.

Hope this helps. How do you like Ron’s Meg?

Best,
Ken

14th January 2007, 17:13	#36 (permalink)
Skipbreather Reads the fine print Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet MK 15.X Home Build Join Date: Mar 2005 Location: Chicago, Illinois, USA Posts: 557	Re: fire alarm Quote: (Originally Posted by decoweenie) Ken, Have you tried to use the alkaline 9V battery in the Meg yet using your adapter ? Based on your numbers above, the Meg consumes about ~100 ma/h (worst case) which gives the 9V alkaline about 3-4 hours - enough for to save dive. Hi Phi I’ve run an ALKALINE 9v battery on the primary side during various test dives. After 4 ½ hours of letting it fire the solenoid under normal swimming demand the under load voltage reading still showed IIRC (was more than 9 months ago) above 7 volts. That battery is still on my bench, waiting for more torture testing and it just now tested 8.58 volts on my Fluke DVOM. 2 caveats. First is that I know you’ve got the Smithers electronics. Mine are APECS 2.01. I’d advise a call to ISC to be certain 9v won’t fry the Smithers ‘leces. Second is I do not know if your Smithers package gives you access to real time voltages. For those not familiar, one of the really valuable features of the APECS 2.x package is the ‘System Monitor’ page. It gives you the real time battery voltage and the mv seen by the handset for each O2 cell. For the primary side it also gives the voltage of the battery when under firing load from the solenoid. Hope this helps. How do you like Ron’s Meg? Best, Ken __________________ "Entropy RULES! Enjoy the interim."
(Online)