| 摘要 |
A radiation measurement device having a radiation detector (1), a measurement instrument (2a) provided with a signal conversion unit (21a) for carrying out signal conversion on a detection current signal output from the radiation detector (1), and a signal input line (20) for supplying the detection current signal output from the radiation detector (1) to the signal conversion unit (21a), wherein if a test mode is selected, a test current signal is superposed on the detection current signal and supplied to the signal conversion unit (21a) through the closing of contacts (2742, 2752) and the connection of a constant-voltage source (271) and the signal input line (20), and if a normal mode is selected, the constant-voltage source (271) is connected to a point having the same potential as the signal input line (20) and the generation of a potential difference between the contacts (2742, 2752) is prevented through the opening of the contacts (2742, 2752) and the disconnection of the constant-voltage source (271) and signal input line (20). |
