A plasma display panel drive method eliminates crosstalk and allows for high quality image display by preventing erroneous discharge from occurring in an address period. The closure device comprises a shaft part extending in the direction of a longitudinal axis and a plurality of sealing elements, which are disposed in the region of an outer surface of the shaft part and are intended for applying to an inner lateral surface of the sample container to be closed, wherein said lateral surface faces the longitudinal axis. The delay of the variable delay element is initially set to a minimum delay value. Thus, if the static arrays are modified to add or delete constants or the diagnostic code is in an abbreviated dump mode, the amount of memory to be allocated will be calculated accurately. The present invention makes boating safer by ensuring adequate ventilation of volatile gasoline fumes, thereby preventing accidental explosions that can occur when a boat’s engine is started. The PLL circuit includes a PFD, a charge-pump coupled to the PFD, an SCR coupled to the charge pump, a filter coupled to the SCR, and a VCO circuit coupled to the filter, wherein the SCR reduces an amplitude of a plurality of current pulses at an output of the charge-pump before the plurality of current pulses reach an input of the VCL circuit.