Just put on a sunray pinpointer. Seems all targets are reading one number higher than what the coil reads. Example: Coil on quarter reads 46 with pinpointer reads 47. Also dime read 44 with coil and 45 with pinpointer. Just wondered if this is normal . Any advice is appreciated as I just put it on and would like to know if it is ok! thanks.. these were all air tests and coin close to coil/probe