Text version of the page 
Text version of the page 
| | | | | | | | | | | | | | | | | | | | | | | Regulator Owner's Manual | | | | | | | | | | Inhalation Resistance Control Knob | | | | | | | | | | Some second stage models are equipped with an additional adjustment, which controls inhalation resistance. This control knob, located beside the IVS/RVS switch, adjusts the amount of effort required to start the air flow at the beginning of the inhalation cycle. As it is turned "in" (clockwise), the opening effort will increase. This will make the second stage less sensitive to sudden changes in ambient pressure. Turning the knob 'taut" (anti-clockwise) will decrease the opening effort to make breathing easier. | | | | | | | | | | This adjustment is particularly useful at deeper depths, or in variable conditions that affect the opening effort of the second stage, such as strong currents or while using a diver propulsion vehicle (DPV). You can use the inhalation control knob to tune your regulator to maintain its peak performance throughout the course of your dive, or you can leave it set in its mid-range position and dive with it as you would any non-adjustable second stage. | | | | | | Resistance | | | | | | | | | | | | | | For more information on using these adjustments, refer to the section titled, Diving With Your Regulator, on page 20. | | | | | | | | | | 12 | | | | | | | | | | | | | | | | | | | | | | |
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