Procedures for testing rebreathers differ from those for testing open circuit equipment. This is a fatal accident rate of over 100 times that of open circuit scuba. Heist's second wife, a painter who does set design for the Open Circuit. This has a similar function to an open circuit demand valve. Equipment failure is rare in open circuit scuba. After reading the battery's open circuit voltage, the load is applied. An independent current source with zero current is identical to an ideal open circuit. There are flameproof resistors that fail (open circuit) before they overheat dangerously. For example, no physical current source can operate when applied to an open circuit. The coefficient ranges from 1 (open circuit) to -1 (short circuit). When connected to an open circuit, there is zero current and thus zero power. There are two kinds of SCBA&colon; open circuit and closed circuit. Less commonly, hyperoxic trimix is sometimes used on open circuit scuba. The amplitude of each pulse constitutes the open circuit voltage. For open circuit, the capacitor will be charged to the DC voltage.