A method for detecting component defects of an analog signal processing circuit, especially for a measurement transmitter. According to one embodiment, a treatment solution includes a surfactant, a complexing agent, and a pH adjuster. When transmitting print data to the printer, the print client encrypts the print data in advance with the acquired public key and transmits the encrypted print data as print transmitting data. The transport is able to notify the operator of exceptions and other conditions, and the operator is able to exercise full control over the transport, without a need for the operator to go to a central console in order to obtain information and issue commands. The toothed gear is rotatably clockwise or counter clockwise mounted to the stator.