Posted by Eins on April 09, 2001 at 13:22:06:
In Reply to: Re: how I understand it posted by Steve on April 09, 2001 at 12:57:18:
Steve,
you can install this "SPG Alarm" yourself:
before every dive, open your tank valve, check the SPG, then close the valve again. Now, breathe out of both regs and watch the SPG as you breathe it to zero. If the SPG worked this time, chances are it is OK for the following dive.
Arno