A method, an apparatus, and a computer program product for wireless communication are provided. The device includes at least an equalization process portion, an abnormality determination portion, a voltage measurement portion, and a control portion. In addition, online visualization tools may be implemented to graphically depict the normalized profiles, as well as differences between the collected profiles and the normalized profiles. One embodiment places the backpressure restrictor upstream of an initial stream switching valve and downstream of sample pre-heat coil.