A method of in-situ pyrometer calibration for a wafer treatment reactor such as a chemical vapor deposition reactor desirably includes the steps of positioning a calibrating pyrometer at a first calibrating position and heating the reactor until the reactor reaches a pyrometer calibration temperature. The charge control resin can provide a toner with superior charging performance. The physical location of the electronic communications device is measured or estimated as needed, after which validating the location identifier occurs when the measured or estimated physical location is calculated to be within a threshold distance of the physical location represented by the location identifier. The sensors are used to detect persons who attempt to cut, climb, lift, or contact the security fence. The secondary thermal connection may include a compressible solid carbon fiber material. Further, the method includes scheduling MSs located in a second predetermined region based on the position of each MS relative to the BS.