Quote:
| Originally Posted by Drmike Actually I used to have problems on ascent as you describe. If you have a full CL and you ascend the gas expands and the PO2 drops. The solenoid opens but because the loop volume is so big now it has to add much more O2 to try to raise the PO2 than it would if the loop was min volume. Then you end up in a runaway or a yoyo situation. |
Amen brother.
I'll try for what is virtually negative volume next time I get to play.
I admit my loop volume is a lot more minimum these days than when I first learnt the trick but I'll probably stick to the switch down trick. It smooths out a lot of the bumps and it's no effort as I have the master controller in my hand free ascending...
I assume you don't have a trick to stop spikes on the descent. Leaving the switch up seems to work well for that and I'm often showing 1.1 when I hit target depth and select high setpoint.
nigelH