The present invention generally relates to compositions and methods for preventing and treating human diseases including, but not limited to, pathogens such as bacteria, yeast, parasites, fungus, viruses, and cancer. A transport frame power supply is arranged to provide power to the DUT in a pre-testing stage. The second contacts extend toward the first contacts and include: first contact portions provided at distal ends of the second contacts; and second contact portions provided further on proximal end sides of the second contacts than the first contacts. The pressing assembly generates a first pressing force acting on the developing unit such that the developing roller is in pressure contact with the image bearing member. The method includes acts of identifying a first data record including a first information content as representing a contact, identifying a second data record that has a second information content differing from the first data record and represents the contact, and merging the first data record and the second data record into a single contact record. In a time period T4, the corrected electric signals is calculated, and the gain circuit characteristics are checked.