The present invention discloses a power control method, apparatus, and system. Each upper surface of the metering blocks is adjustably spaced from the ink receiving fountain roller. In response, the service control point transmits a second signaling message to the mobile switching center indicating to the service switching point a second set of parameters required by the service control point with respect to the first signaling message. Reverse flow is initially prevented as an internal differential pressure seats the valve plug on the internal seat and causes the piston body to shift to the second operating position upon reaching a predetermined threshold. In addition, the system may further provide mechanisms to reconfigure the meter to perform a new function when it has been determined that the triggering event has occurred.