Method and system for controlling gain and offset in...

Details Method and system for controlling gain and offset in... Method and system for controlling gain and offset in...

G - Physics

01

J

354/29

G01J 1/18 (2006.01) G01T 1/208 (2006.01) G01J 1/08 (2006.01) G01J 1/44 (2006.01)

Patent

CA 1333638

A measurement of standard light is performed during radiation measurement for gain correction and offset correction of radiation measurement apparatus. The standard light emitted by a LED falls on a PMT. An output signal of a preamplifier corresponding to the PMT is entered into a system controller after being subjected to predetermined analog signal processing. The system controller calculates a gain correction value and an offset correction value on the basis of initial correction values and an output value of the preampli- fier, whereby gain control and offset control can be performed stably even in radiation measurement.

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