Just some info,

the codemasters are monophasic the guidelines (2005) state that 360j is the prefered energy for defibrillation using a monophasic machine in cardiac arrest
Algorythm link below.
http://www.resus.org.uk/pages/alsalgo.pdf

200j is used occasionally in emergencies where the operator isn't sure whether the machine is biphasic or monophasic.
After risk assessment we are planning to replace our codemasters with biphasic technology as the codemasters are starting to fail and are no longer supported by phillips