Resetting target meters without resetting source meter in eAM

For my application, we are trying to use a source meter to feed multiple target meters.  The source meter represents the total hours on the engine.  The target meters represent the hours on each component of the engine (the turbocharger, each injector, the governor, etc).  We would like to use the source meter to feed the meters associated with the components.  However, we would also like to reset the target meters independently of each other and independently of the source meter.  After a target meter is reset, its value is still received from the source meter, but only as a change value.